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Bomi Sim, Jong Soo Kim, Hyejin Bae, Sungho Nam, Eunsuk Kwon, Ji Whan, Kim, Hwa-Young Cho, Sunghan Kim*, Jang-Joo Kim*, “Comprehensive Model of the Degradation of Organic Light-Emitting Diodes and Application for Efficient, Stable, Blue Phoshphorescent Devices with Reduced Influence of Polarons”, Physical Review Applied, 14, 024002 (2020)

Min Jung Kim, Soyun Lee, Chang-Ki Moon, Jang-Joo Kim, Jae Ryoun Youn*, Young Seok Song*, ” A broadband Multiplex Living Solar Cell”, Nano Lett. 20, 6, 4286-4291 (2020)

Developing renewable and sustainable energy sources is a compelling goal in materials science and engineering. In particular, natural photosynthesis with its infinite energy reservoir provides profound inspiration for energy conversion and storage systems. Here, we report a multiplex living solar cell that offers a drastic power enhancement by harnessing the broadband spectra of the visible wavelength range for photosynthesis. Cyanobacteria are embedded into a nanostructural complex composed of Au nanoparticles (NPs) and ZnO nanorods (NRs). This nanocomposite system is capable of not only generating excitons but also amplifying the photosynthetic performance of the cell via a far-field scattering effect in the broadband region of the light, resulting in multiplex energy harvesting with a peak power density of 6.15 mW/m2. We envision that this study will provide a strategic way to enhance the performance of biophotovoltaics, enabling efficient and durable energy generation.

Hwang-Beom Kim, Jang-Joo Kim*

“Simple method to extract extinction coefficients of films with the resolution of 10-5 using just transmission data and application to intermolecular charge-transfer absorption in an exciplex-forming organic film”

Opt. Express 28, 8, 11892-11898 (2020)

A simple method is presented to determine the thickness, refractive index and extinction coefficient of a film with the resolutions of ±1 nm, ±2 × 10−3, and 6 × 10−5, respectively. The method requires only ultraviolet-visible-near-infrared spectroscopy measurement of the transmittance of films with thicknesses of a few micrometers. A very small extinction coefficient of intermolecular charge transfer (CT) absorption of an exciplex-forming organic film is measured in the sub-bandgap wavelength region. This is to demonstrate that the CT absorption with extinction coefficient in the range of 10−3 to 10−5 can be measured indeed using the method, which is in the same resolution as photothermal deflection spectroscopy and Fourier transform photocurrent spectroscopy. The simplicity and feasibility of the proposed approach is expected to promote active study of intermolecular CT absorption in exciplex-forming films.

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Jin-Suk Huh(+), Yeon Hee Ha(+), Soon-Ki Kwon, Yun-Hi Kim*, Jang-Joo Kim*

“Design Strategy of Anthracene-Based Fluorophores toward High-Efficiency Deep Blue Organic Light-Emitting Diodes Utilizing Triplet-Triplet Fusion”

ACS Appl. Mater. Interfaces 12, 13,15422-15429 (2020)

In contrast to the red and green regions, conventional fluorescent emitters continue to serve as blue emitters in commercialized organic light-emitting diodes. Many researchers have studied anthracene moieties as blue emitters, given their appropriate energy levels and good emission properties. We herein report two new deep blue-emitting anthracene derivatives that include p-xylene as moieties connecting the anthracene cores to side groups. We enhanced the efficiency by maximizing triplet–triplet fusion (TTF) without sacrificing emission color. The large steric hindrance imposed by the methyl groups of p-xylene creates a perpendicular geometry between p-xylene and the neighboring aromatic rings. Any extension of π-conjugation is thus disrupted, and the isolated core anthracene moiety emits a deep blue color with a high photoluminescence quantum yield. Moreover, the extensive steric hindrance suppresses vibration and rotation because the molecules are rigid. The high horizontal dipole ratio attributable to the large aspect ratio increases the outcoupling efficiency of the emitted light. Furthermore, the charge mobility and triplet harvesting ability are enhanced by decreasing the bulkiness of the side groups. Molecular dynamics simulation revealed that the bulkiness of the side group significantly impacted molecular density, which in turn affected the charge transport and TTF. We used two molecules, 2PPIAn (containing a phenyl side group) and 4PPIAn (containing a terphenyl side group), to form nondoped emission layers that exhibited maximum external quantum efficiencies of 8.9 and 7.1% with Commission Internationale de L’Eclairage coordinates of (0.150, 0.060) and (0.152, 0.085), respectively.

Jin-Suk Huh, Kwon-Hyeon Kim, Jang-Joo Kim*“Emitting dipole orientation and molecular orientation of homoleptic Ir(III) complexes”Org. Electron. 82, 105715 (2020)

Origin and significance of emitting dipole orientation (EDO) of emitters in organic light-emitting diodes (OLEDs) have been studied extensively in recent years. However, EDO of homoleptic Ir(III) complexes (Homo-IrCs) have received less attention due to their three-fold molecular symmetry and resulting expectation to have random EDO. Herein, we report the EDOs of Homo-IrCs doped in various host materials. Interestingly the EDO of Homo-IrCs varies from preferred horizontal direction to rather vertical direction depending on dopant and host molecules. The variation of EDO of Homo-IrCs is correlated with the direction of the transition dipole moment (TDM) against the molecular C3 axis and the orientation of C3 axis of the dopants in films. The average orientations of the Homo-IrCs are extracted from measured the horizontal dipole ratios (Θs) and calculated TDM directions. Angle between the TDM direction and C3 axis in the Homo-IrCs under investigation are larger than 54.7° corresponding to the mutually orthogonal axes among the three transition dipole vectors so that the EDO of Homo IrCs can deviate from random orientation depending on the orientation of the C3 axis in films. Average molecular orientation of a HOMO-IrC in films varies by 10°–13° depending on host materials. In contrast, smaller variation (<5°) is observed among different Homo IrCs in a same host. The results indicate that host material is one of the dominating factors determining orientation of Homo-IrC molecules. Tris[(3,5-difluoro-4-cyanophenyl)-pyridine]iridium(III) (FCNIr) shows exceptionally high horizontal orientation, which likely originates from the dipole-dipole interaction between the dopant and hosts. FCNIr doped in diphenyl[4-(triphenylsilyl)phenyl]phosphine oxide (TSPO1) shows strong preferred horizontal EDO with the Θ of 0.78, demonstrating the possibility of large Θ value of Homo-IrCs.

Yu Kyung Moon(+), Jin-Suk Huh(+), Sonam Kim, Sinheui Kim, Seung Yeon Yi, Jang-Joo Kim*, Youngmin You*

“Synthetic Strategy for Preserving Sky-Blue Electrophosphorescence in Square-Planar Pt(II) Complexes”

ACS Electron. Mater. 2, 2, 604-617 (2020)

Phosphorescent Pt(II) complexes having tetradentate ligands have emerged as promising materials for use in organic light emitting devices (OLEDs). One drawback that retards the full exploitation of their electroluminescence is a strong propensity for bathochromically shifted emissions. The chromic shift results from intermolecular association. Molecular strategies that avoid the intermolecular interactions are needed, particularly for producing blue electrophosphorescence. We have designed and synthesized a series of phosphorescent cycloplatinate complexes having bis(1-pyrazolylphenyl)methane tetradentate ligands (PtSN1–3). The ligands have been systematically modified to incorporate methyl substituents at different positions of the pyrazole moieties (PtSN1, no methyl substituent; PtSN2, 4-methyl substituents; PtSN3, 3-methyl substituents) with the aim of preserving intrinsic sky-blue phosphorescence while suppressing intermolecular interactions. The synthetic modifications control the extent of out-of-plane distortions in the cycloplatinate scaffold. Excimer emission is obtained from PtSN1–2 of planar platinacycles in diluted solutions (10 μM) or in thin mCBP:TSPO1 (8 wt %) films (1:1, wt/wt; mCBP = 3,3-di(9H-carbazol-9-yl)biphenyl; TSPO1 = diphenyl(4-(triphenylsilyl)phenyl)phosphine oxide) due to strong spontaneous excimer formation with free energy changes of −4.4 to −3.1 kJ mol–1. By contrast, helically distorted PtSN3 is capable of preserving its inherent sky-blue phosphorescence in concentrated states as it effectively suppresses excimer formation. An additional benefit of our synthetic control is improved stability against degradation for PtSN3. Finally, electroluminescence performances were evaluated by constructing and analyzing multilayer OLEDs employing the PtSN complexes as dopants. As expected, the PtSN3 devices produced sky-blue electrophosphorescence with a Commission Internationale de l’Éclairage coordinate of (0.16, 0.24) and a peak external quantum efficiency of 8.5%. The electrophosphorescence spectra of the PtSN1–2 devices were contaminated with excimer luminescence. These results collectively demonstrated the effectiveness of the helical distortion approach for obtaining blue electrophosphorescence.

Hwang-Beom Kim, Jang-Joo Kim*

“Diffusion Mechanism of Exciplexes in Organic Optoelectronics”

Phys. Rev. Appl. 13, 024006 (2020)

Excited-state charge-transfer complexes (exciplexes) are actively exploited in organic optoelectronics to understand their nature in the solid state and improve device performance. However, the diffusion of exciplexes is not actively studied, despite its ever-growing importance in such devices due to the lack of apparent charge-transfer (CT) absorption. Here, we report, based on time-resolved photoluminescence spectroscopy, that energy transfer (ET) takes place directly from exciplexes to exciplexes; this is called exciplex-exciplex ET. Recent reports and our own observation of the subband-gap CT absorption in exciplex-forming systems support the direct exciplex-exciplex ET. The ET takes place dominantly via the Dexter-type exchange mechanism, as revealed by the exponential decrease of the ET rate constant with separation between the energy-donating exciplex and the energy-accepting exciplex.

Youngnam Lee, Seung-Je Woo, Jang-Joo Kim*, Jong-In Hong*

“Blue thermally activated delayed fluorescence emitter using modulated triazines as electron acceptors”

Dyes and Pigments 172, 107864 (2020)

Three types of thermally activated delayed fluorescence (TADF) emitters, namely, moTrSAc, tmTrSAc, and motmTrSAc, are reported that emit blue-shifted emission with high external quantum efficiencies (EQEs). These emitters have electron donating spiroacridine in common and various triazine-based electron acceptors. The electronic and structural control on the electron acceptor moiety adjusts the reduction potential of the molecule to shift the emission wavelength to the blue region. Moreover, as these emitters become widened, the light out-coupling efficiency increases due to the enhanced horizontal emitting dipole orientation. As a result, OLEDs based on moTrSAc, tmTrSAc, and motmTrSAc emit blue light in a range of 460–480 nm with high EQEs of 21.3, 15.5, and 19.5%, respectively.

2015 ~ 2019

Markus Regnat*, Kurt P. Pernstich, Kwon-Hyeon Kim, Jang-Joo Kim, Frank Nuesch, Beat Ruhstaller

“Routes for Efficiency Enhancement in Fluorescent TADF Exciplex Host OLEDs gained from an Electro-Optical Device Model”

Adv. Electron. Mater. 1900804, (2019)

Youngnam Lee, Seung-Je Woo, Jang-Joo Kim*, Jong-In Hong*

“Linear-shaped thermally activated delayed fluorescence emitter using 1,5-naphthyridine as an electron acceptor for efficient light extraction”

Org. Electron. (2019)

Hyoungcheol Lim, Hyung Jin Cheon, Gyeong Seok Lee, Mikyung Kim, Yun-Hi Kim*, and Jang-Joo Kim*

“Enhanced Triplet-Triplet Annihilation of Blue Fluorescent Organic Light-Emitting Diodes by Generating Excitons in Trapped Charge-Free Regions”

ACS Appl. Mater. Interfaces 11, 51, 48121-48127(2019)

Swetha S.M.Bhat(+), Sachin A. Pawar(+), Darshna Potphode, Chang-Ki Moon, Jun Min Suh, Changyeon Kim, Seokhoon Choi, Dipali S.Patil, Jang-JooKim, Jae Cheol Shin*, Ho Won Jang*

“Substantially enhanced photoelectrochemical performance of TiO2 nanorods/CdS nanocrystals heterojunction photoanode decorated with MoS2 nanosheets”

Appl. Cat. B: Environ., 259, 118102 (2019)

Jin-Suk Huh (+), Chang-Ki Moon (+), Jang-Joo Kim

“Dependence of apparent emitting dipole orientation of an Ir(III) complex on doping concentration, film thickness, and excitation condition”

Org. Electon., 74, 299-303 (2019)

Hyun Shin (+), Yeon Hee Ha (+), Hyun-Gu Kim (+), Ran Kim, Soon-Ki Kwon*, Yun-Hi Kim*, Jang-Joo Kim*

“Controlling Horizontal Dipole Orientation and Emission Spectrum of Ir Complexes by Chemical Design of Ancillary Ligands for Efficient Deep-Blue Organic Light-Emitting Diodes”

Adv. Mater., 31, 1808102 (2019)

Joo-Young Kim(+), Eun Kyung Lee(+), Jiyoung Jung, Don-Wook Lee, Youngjun Yun, Jong Won Chung, Jeong-Il Parka and Jang-Joo Kim*

“Densely cross-linked polysiloxane dielectric for organic thin-film transistors with enhanced electrical stability”

J. Mater. Chem. C 7, 5821-5829 (2019)

Akpeko Gasonoo, Jae-Min Kim, Seung-Jun Yoo, Yong-Joon Cho, Jeong-Hwan Lee, Yoonseuk Choi, Jang-Joo Kim*, Jae-Hyun Lee

“Analysis of the charge transfer and separation in electrically doped organic semiconductors by electron spin resonance spectroscopy”

Organic Electronics 67, 242-246 (2019)

Jae-Min Kim, Jang-Joo Kim*

“Charge transport layers manage mobility and Carrier density balance in light-emitting layers influencing the operational stability of organic light emitting diodes”

Organic Electronics 67, 43-49 (2019)

Seung-Je Woo(+), Youheon Kim(+), Yun-Hi Kim*, Soon-Ki Kwon*, Jang-Joo Kim*

“A spiro-silafluorene-phenazasiline donor-based efficient blue thermally activated delayed fluorescence emitter and its host-dependent device characteristics”

J. Mater. Chem. C 7, 4191-4198 (2019)

Seung-Je Woo(+), Youheon Kim(+), Soon-Ki Kwon, Yun-Hi Kim*, and Jang-Joo Kim*

“Phenazasiline/Spiroacridine Donor Combined with Methyl-Substituted Linkers for Efficient Deep Blue Thermally Activated Delayed Fluorescence Emitters”

ACS Appl. Mater. Interfaces 11, 7199-7207 (2019)

Joo-Young Kim, Byonggwon Song, Jungwoo Kim, Hyoek Kim, Myung-Sup Jung, Bang-Lin Lee, Jeong-Il Park, Jang-Joo Kim*

“Uniform Insulating Properties of Low-Temperature Curable Gate Dielectric for Organic Thin-Film Transistor Arrays on Plastic Substrate”

IEEE Electron Device Letters 40, 1 , 99-102 (2019)

Hyun-Gu Kim, Hyun Shin, Yeon Hee Ha, Ran Kim, Soon-Ki Kwon*, Yun-Hi Kim*, Jang-Joo Kim*

“Triplet Harvesting by a Fluorescent Emitter Using a Phosphorescent Sensitizer for Blue Organic-Light-Emitting Diodes” ACS Appl. Mater. Interfaces 11, 26-30 (2019)

Joo-Young Kim, Ji Whan Kim, Eun Kyung Lee, Jeong-Il Park, Bang-Lin Lee, Young-Nam Kwon, Sunjung Byun, Myung-Sup Jung* and Jang-Joo Kim*

“Cross-linked poly(hydroxy imide) gate-insulating materials for low-temperature processing of organic thin-film transistors”

J. Mater. Chem. C 6, 13359-13366 (2018)

Jinouk Song, Kwon-Hyeon Kim, Eunhye Kim, Chang-Ki Moon, Yun-Hi Kim, Jang-Joo Kim*& Seunghyup Yoo*

“Lensfree OLEDs with over 50% external quantum efficiency via external scattering and horizontally oriented emitters”

Nature Communications 9, Article number: 3207 (2018)

Hwang-Beom Kim, Jang-Joo Kim*

“A simple method to measure intermolecular charge-transfer absorption of organic films”

Organic Electronics 62, 511-515 (2018)

Young Hoon Lee, Sunghee Park, Jihun Oh, Seung-Je Woo, Ajay Kumar, Jang-Joo Kim, Jaehoon Jung*, Seunghyup Yoo*, Min Hyung Lee*

“High-Efficiency Sky Blue to Ultradeep Blue Thermally Activated Delayed Fluorescent Diodes Based on Ortho-Carbazole-Appended Triarylboron Emitters: Above 32% External Quantum Efficiency in Blue Devices”

Adv. Optical Mater. 6, 1800385 (2018)

Caroline Kotlowski, Patrik Aspermair, Hadayat Ullah Khan, Ciril Reiner-Rozman, Josef Breu, Sabine Szunerits, Jang-Joo Kim, Zhenan Bao, Christoph Kleber, Paolo Pelosi and Wolfgang Knoll*

“Electronic biosensing with flexible organic transistor devices”

Flex. Print. Electron. 3, 034003 (2018)

Kwon-Hyeon Kim, Jang-Joo Kim*

“Origin and Control of Orientation of Phosphorescent and TADF Dyes for High-Efficiency OLEDs”

Adv. Mater. 30, 1705600 (2018)

Chang-Ki Moon, Jin-Suk Huh, Jae-Min Kim, Jang-Joo Kim*

“Electronic structure and emission process of excited charge transfer states in solids”

Chem. Mater. 30, 5648-5654 (2018)

Min-Soo Choi, Sangmin Chae, Hyo Jung Kim, Jang-Joo Kim*

“Control of Crystallinity in PbPc:C60 blend film and Application for Inverted Near-Infrared Organic Photodetector”

ACS Appl. Mater. Interfaces 10, 25614-25620 (2018)

Min-Soo Choi, Siwoo Lee, Hyo Jung Kim, Jang-Joo Kim*

“Inverted near-infrared organic photodetector with oriented lead (II)phthalocyanine molecules via substrate heating”

Organic Electronics 61, 164-169 (2018)

Hong Chul Lim, Jang-Joo Kim*, Jyongsik Jang* and Jong-In Hong*

“Effect of the π-linker on the performance of organic photovoltaic devices based on push-pull D-π-A molecules”

New J. Chem. 42, 11458–11464 (2018)

Kyung-Hoon Han(+), Young-Sam Park(+)*, Doo-Hee Cho, Yoonjay Han, Jonghee Lee, Byoung-Gon Yu, Nam Sung Cho, Jeong-Ik Lee, Jang-Joo Kim*

“Optical analysis of power distribution in top-emitting organic light emitting diodes integrated with nano-lens array using finite difference time domain”

ACS Appl. Mater. Interfaces 10, 18942-18947 (2018)

Kwan Kim(+), Kyoung-Hoon Han(+), Yang-Doo Kim, Daihong Huh, Yoonjay Han, Heon Lee, Jang-Joo Kim*

“Dual pattern for enhancing light extraction efficiency of white organic light-emitting diodes”

Organic Electronics 57, 201-205 (2018)

Chang-Heon Lee, Jeong-Hwan Lee, Kwon-Hyeon Kim, and Jang-Joo Kim*

“Unveiling the Role of Dopant Polarity in the Recombination and Performance of Organic Light-Emitting Diodes”

Adv. Funct. Mater. 28, 1800001 (2018)

Sohee Jeon(+), Sunghun Lee(+), Kyung-Hoon Han(+), Hyun Shin, Kwon-Hyeon Kim, Jun-Ho Jeong*, Jang-Joo Kim*

“High-Quality White OLEDs with Comparable Efficiencies to LEDs”

Adv. Optical Mater. 6, 1701349 (2018)

Noh-Hwal Park, Seung-Hoon Lee, Seung-Hyeon Jeong, Dongyoon Khim, Yun Ho Kim, Sungmi Yoo, Yong-Young Noh* and Jang-Joo Kim*

“Heterostructured semiconductor single-walled carbon nanotube films for solution-processed high-performance field-effect transistors”

Semicond. Sci. Technol. 33, 035017 (2018)

Seung-Je Woo(+), Youheon Kim(+), Myeong-Jong Kim, Jang Yeol Baek, Soon-Ki Kwon*, Yun-Hi Kim* , Jang-Joo Kim*

“Strategies for the Molecular Design of Donor-Acceptor-type Fluorescent Emitters for Efficient Deep Blue Organic Light Emitting Diodes”

Chem. Mater. 30, 857-863 (2018)

Jae-Min Kim, Chang-Heon Lee, Jang-Joo Kim*

“Mobility balance in the light-emitting layer governs the polaron accumulation and operational stability of organic light-emitting diodes”

Applied Physics Letters, 111 (20), 203301 (2017)

Hyoungcheol Lim, Hyun Shin, Kwon-Hyeon Kim, Seung-Jun Yoo, Jin-Suk Huh, Jang-Joo Kim*

“An Exciplex Host for Deep-Blue Phosphorescent Organic Light-Emitting Diodes”

ACS Applied Materials & Interfaces, 9 (43), 37883-37887 (2017)

Chang-Ki Moon, Kwon-Hyeon Kim, Jang-Joo Kim*

“Unraveling the orientation of phosphors doped in organic semiconducting layers”

Nature Communications, 8, 791 (2017)

Young Hoon Sung, Kyung-Hoon Han, Yang Doo Kim, Yoonjay Han, Jang-Joo Kim*, Heon Lee*

“Air void optical scattering structure for high-brightness organic light emitting diodes”

Ceramics International, 43 (S1), S455-S459 (2017)

Young Hoon Sung(+), Pil-Hoon Jung(+), Kyung-Hoon Han, Yang Doo Kim, Jang-Joo Kim*, Heon Lee*

“Improved out-coupling efficiency of organic light emitting diodes fabricated on a TiO2 planarization layer with embedded Si oxide nanostructures”

Optical Materials, 72, 828-832 (2017)

Hyun-Gu Kim, Kwon-Hyeon Kim, Jang-Joo Kim*

“Highly Efficient, Conventional, Fluorescent Organic Light-Emitting Diodes with Extended Lifetime”

Advanced Materials, 29 (39), 1702159 (2017)

Jin-Suk Huh, Kwon-Hyeon Kim, Chang-Ki Moon, Jang-Joo Kim*

“Dependence of Pt(II) based phosphorescent emitter orientation on host molecule orientation in doped organic thin films”

Organic Electronics, 45, 279-284 (2017)

Myeong-Jong Kim(+), Seung-Jun Yoo(+), Jaeyoung Hwang, Sung-Jin Park, Jae-Wook Kang, Yun-Hi Kim*, Jang-Joo Kim*, Soon-Ki Kwon*

“Synthesis and characterization of perfluorinated phenyl-substituted Ir(III) complex for pure green emission”

Journal of Materials Chemistry C, 5 (12), 3107-3111 (2017)

Chang-Ki Moon, Katsuaki Suzuki, Katsuyuki Shizu, Chihaya Adachi, Hironori Kaji,* Jang-Joo Kim*

“Combined Inter- and Intramolecular Charge-Transfer Processes for Highly Efficient Fluorescent Organic Light-Emitting Diodes with Reduced Triplet Exciton Quenching”

Advanced Materials, 29 (17), 1606448 (2017)

Jeong-Hwan Lee(+), Hyun Shin(+), Jae-Min Kim, Kwon-Hyeon Kim, Jang-Joo Kim*

“Exciplex-Forming Co-Host-Based Red Phosphorescent Organic Light-Emitting Diodes with Long Operational Stability and High Efficiency”

ACS Applied Materials & Interfaces, 9 (4), 3277-3281 (2017)

Seung-Jun Yoo, Jeong-Hwan Lee, Jae-Min Kim, Jang-Joo Kim*

“Hole mobility in various transition-metal-oxides doped organic semiconductor films”

Applied Physics Letters, 110 (5), 053303 (2017)

Chan Seok Oh(+), Chang-Ki Moon(+), Jeong Min Choi, Jin-Suk Huh, Jang-Joo Kim, Jun Yeob Lee*

“Relationship between molecular structure and dipole orientation of thermally activated delayed fluorescent emitters”

Organic Electronics, 42, 337-342 (2017)

Jin Won Sun(+), Jang Yeol Baek(+), Kwon-Hyeon Kim, Jin-Suk Huh, Soon-Ki Kwon*, Yun-Hi Kim*, Jang-Joo Kim*

“Azasiline-based thermally activated delayed fluorescence emitters for blue organic light emitting diodes”

Journal of Materials Chemistry C, 5 (5), 1027-1032 (2017)

Hyun-Gu Kim, Kwon-Hyeon Kim, Chang-Ki Moon, Jang-Joo Kim*

“Harnessing Triplet Excited States by Fluorescent Dopant Utilizing Codoped Phosphorescent Dopant in Exciplex Host for Efficient Fluorescent Organic Light Emitting Diodes”

Advanced Optical Materials, 5 (3), 1600749 (2017)

Young-Sam Park*(+), Kyung-Hoon Han(+), Jehan Kim, Doo-Hee Cho, Jonghee Lee, Yoonjay Han, Jong Tae Lim, Nam Sung Cho, Byounggon Yu, Jeong-Ik Lee, Jang-Joo Kim*

“Crystallization-assisted nano lens array fabrication for highly efficient and color stable organic light emitting diodes”

Nanoscale, 9, 230-236 (2017)

Bomi Sim, Chang-Ki Moon, Kwon-Hyeon Kim, Jang-Joo Kim*

“Quantitative Analysis of the Efficiency of OLEDs”

ACS Applied Materials & Interfaces, 8 (48), 33010-33018 (2016)

Ganguri Sarada(+), Bomi Sim(+), Chang-Ki Moon, Woosum Cho, Kwon-Hyeon Kim, Vijaya Gopalan Sree, Eunju Park, Jang-Joo Kim*, Sung-Ho Jin*

“Synthesis and characterization of highly efficient blue Ir(III) complexes by tailoring β-diketonate ancillary ligand for highly efficient PhOLED applications”

Organic Electronics, 39, 91-99 (2016)

Kwon-Hyeon Kim(+), Eun Soo Ahn(+), Jin-Suk Huh, Yun-Hi Kim*, Jang-Joo Kim*

“Design of heteroleptic Ir complexes with horizontal emitting dipoles for highly efficient organic light-emitting diodes with an EQE of 38%”

Chemistry of Materials, 28 (20), 7505-7510 (2016)

Kwon-Hyeon Kim(+), Jang Yeol Baek(+), Chan Woo Cheon, Chang-Ki Moon, Bomi Sim, Myeong Yong Choi, Jang-Joo Kim*, Yun-Hi Kim*

“Highly efficient non-doped deep blue fluorescent emitters with horizontal emitting dipoles using interconnecting units between chromophores”

Chemical Communications, 52 (73), 10956-10959 (2016)

Dong-Gwang Ha, Jang-Joo Kim*, Marc A. Baldo*

“Link between hopping models and percolation scaling laws for charge transport in mixtures of small molecules”

AIP Advances, 6 (4), 045221 (2016)

Jae-Min Kim, Seung-Jun Yoo, Chang-Ki Moon, Bomi Sim, Jae-Hyun Lee*, Heeseon Lim, Jeong Won Kim, Jang-Joo Kim*

“N-type Molecular Doping in Organic Semiconductors: Formation and Dissociation Efficiencies of Charge Transfer Complex”

The Journal of Physical Chemistry C, 120 (17), 9475-9481 (2016)

Hyun Shin, Jeong-Hwan Lee, Chang-Ki Moon, Jin-Suk Huh, Bomi Sim, Jang-Joo Kim*

“Sky-Blue Phosphorescent OLEDs with 34.1% External Quantum Efficiency Using a Low Refractive Index Electron Transporting Layer”

Advanced Materials, 28 (24), 4920-4925 (2016)

Jin Won Sun, Kwon-Hyeon Kim, Chang-Ki Moon, Jeong-Hwan Lee, Jang-Joo Kim*

“Highly efficient sky-blue fluorescent organic light emitting diode based on mixed co-host system for thermally activated delayed fluorescence emitter (2CzPN)”

ACS Applied Materials & Interfaces, 8 (15), 9806-9810 (2016)

Ganguri Sarada, Bomi Sim, Woosum Cho, Juho Yoon, Yeong-Soon Gal, Jang-Joo Kim*, Sung-Ho Jin*

“New sky-blue and bluish-green emitting Ir(III) complexes containing an azoline ancillary ligand for highly efficient PhOLEDs”

Dyes and Pigments, 131, 60-68 (2016)

Beom-Soo Kim, Min-Hyung Choi, Min-Soo Choi, Jang-Joo Kim*

“Composition-controlled organometal halide perovskite via CH3NH3I pressure in vacuum codeposition process”

Journal of Materials Chemistry A, 4 (15), 5663-5668 (2016)

Kwon-Hyeon Kim, Seung-Jun Yoo, Jang-Joo Kim*

“Boosting Triplet Harvest by Reducing Nonradiative Transition of Exciplex toward Fluorescent Organic Light-Emitting Diodes with 100% Internal Quantum Efficiency”

Chemistry of Materials, 28 (6), 1936-1941 (2016)

Kwon-Hyeon Kim, Jia-Ling Liao, Si Woo Lee, Bomi Sim, Chang-Ki Moon, Gene-Hsiang Lee, Hyo Jung Kim, Yun Chi*, Jang-Joo Kim*

“Crystal Organic Light-Emitting Diodes with Perfectly Oriented Non-Doped Pt-Based Emitting Layer”

Advanced Materials, 28 (13), 2526-2532 (2016)

Cholho Lee, Kyung-Hoon Han, Kwon-Hyeon Kim, Jang-Joo Kim*

“Direct formation of nano-pillar arrays by phase separation of polymer blend for the enhanced out-coupling of organic light emitting diodes with low pixel blurring”

Optics Express, 24 (6), A488-A496 (2016)

Hyun-Sub Shim, Chang-Ki Moon, Jihun Kim, Chun-Kai Wang, Bomi Sim, Francis Lin, Ken-Tsung Wong, Yongsok Seo, Jang-Joo Kim*

“Efficient Vacuum-Deposited Ternary Organic Solar Cells with Broad Absorption, Energy Transfer, and Enhanced Hole Mobility”

ACS Applied Materials & Interfaces, 8 (2), 1214-1219 (2016)

Yongjun Jeon(+), Tae-Min Kim(+), Jang-Joo Kim*, Jong-In Hong*

“Vacuum-depositable thiophene- and benzothiadiazole-based donor materials for organic solar cells”

New Journal of Chemistry, 39 (12), 9591-9595 (2015)

Yang Doo Kim(+), Kyung-Hoon Han(+), Young Hoon Sung, Jung-Bum Kim, Hak-Jong Choi, Heon Lee*, Jang-Joo Kim*

“Enhanced light extraction efficiency in organic light-emitting diode with randomly dispersed nanopattern”

Optics Letters, 40 (24), 5838-5841 (2015)

Jin Won Sun(+), Jang Yeol Baek(+), Kwon-Hyeon Kim, Chang-Ki Moon, Jeong-Hwan Lee, Soon-Ki Kwon, Yun-Hi Kim*, Jang-Joo Kim*

“Thermally Activated Delayed Fluorescence from Azasiline Based Intramolecular Charge-Transfer Emitter (DTPDDA) and a Highly Efficient Blue Light Emitting Diode”

Chemistry of Materials, 27 (19), 6675-6681 (2015)

Hyun-Sub Shim, Francis Lin, Jihun Kim, Bomi Sim, Tae-Min Kim, Chang-Ki Moon, Chun-Kai Wang, Yongsok Seo*, Ken-Tsung Wong*, and Jang-Joo Kim*

“Efficient Vacuum-Deposited Tandem Organic Solar Cells with Fill Factors Higher Than Single-Junction Subcells”

Advanced Energy Materials, 5 (13), 1500228 (2015)

Min-Soo Choi, Tae-Min Kim, Hyun-Sub Shim, Beom-Soo Kim, Hyo Jung Kim, and Jang-Joo Kim*

“Enhancement of the Fill Factor through an Increase of the Crystallinity in Fullerene-Based Small-Molecule Organic Photovoltaic Cells”

ACS Applied Materials & Interfaces, 7 (17), 9134-9138 (2015)

Kwon-Hyeon Kim(+), Jae-Yeol Ma(+), Chang-Ki Moon, Jeong-Hwan Lee, Jang Yeol Baek, Yun-Hi Kim*, and Jang-Joo Kim*

“Controlling Emitting Dipole Orientation with Methyl Substituents on Main Ligand of Iridium Complexes for Highly Efficient Phosphorescent Organic Light-Emitting Diodes”

Advanced Optical Materials, 3 (9), 1191-1196 (2015)

Hyun Hwi Lee(+), Jeong-Hwan Lee(+), Jang-Joo Kim, and Hyo Jung Kim*

“Crystallinity and interface of 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile thin films between organic and transparent conductive oxide layers”

Applied Physics Express, 8 (5), 051601 (2015)

Seung-Jun Yoo, Jang-Joo Kim*

“Charge Transport in Electrically Doped Amorphous Organic Semiconductors”

Macromolecular Rapid Communications, 36 (11), 984-1000 (2015)

Chang-Ki Moon, Kwon-Hyeon Kim, Jin Woo Lee, and Jang-Joo Kim*

“Influence of host molecules on emitting dipole orientation of phosphorescent iridium complexes”

Chemistry of Materials, 27 (8), 2767-2769 (2015)

Chang-Ki Moon, Sei-Yong Kim, Jeong-Hwan Lee, and Jang-Joo Kim*

“Luminescence from oriented emitting dipoles in a birefringent medium”

Optics Express, 23 (7), A279-A291 (2015)

Sohee Jeon, Jeong-Hwan Lee, Jun-Ho Jeong, Young Seok Song, Chang-Ki Moon, Jang-Joo Kim, and Jae Ryoun Youn*

“Vacuum Nanohole Array Embedded Phosphorescent Organic Light Emitting Diodes”

Scientific Reports, 5, 8685 (2015)

Kwon-Hyeon Kim, Chang-Ki Moon, Jin Won Sun, Bomi Sim, and Jang-Joo Kim*

“Triplet Harvesting by a Conventional Fluorescent Emitter Using Reverse Intersystem Crossing of Host Triplet Exciplex”

Advanced Optical Materials, 3 (7), 895-899 (2015)

Jung-Bum Kim, Jeong-Hwan Lee, Chang-Ki Moon, Kwon-Hyeon Kim, and Jang-Joo Kim*

“Highly enhanced light extraction from organic light emitting diodes with little image blurring and good color stability”

Organic Electronics, 17, 115-120 (2015)

Jung-Bum Kim(+), Seung-Hoon Han(+), Kiyull Yang, Soon-Ki Kwon*, Jang-Joo Kim*, and Yun-Hi Kim*

“Highly efficient deep-blue phosphorescence from heptafluoropropyl-substituted iridium complexes”

Chemical Communications, 51 (1), 58-61 (2015)

Chuan Liu(+), Junhyuk Jang(+), Yong Xu, Hyo-Jung Kim, Dongyoon Khim, Won-Tae Park, Yong-Young Noh*, and Jang-Joo Kim*

“Effect of Doping Concentration on Microstructure of Conjugated Polymers and Characteristics in N-Type Polymer Field-Effect Transistors”

Advanced Functional Materials, 25 (5), 758-767 (2015)

Beom-Soo Kim , Tae-Min Kim , Min-Soo Choi , Hyun-Sub Shim , Jang-Joo Kim*

“Fully vacuum-processed perovskite solar cells with high open circuit voltage using MoO3/NPB as hole extraction layers”

Organic Electronics, 17, 102-106 (2015)

Jeong-Hwan Lee(+), Ganguri Sarada(+), Chang-Ki Moon(+), Woosum Cho, Kwon-Hyeon Kim, Young Geun Park, Jin Yong Lee, Sung-Ho Jin*, and Jang-Joo Kim*

“Finely Tuned Blue Iridium Complexes with Varying Horizontal Emission Dipole Ratios and Quantum Yields for Phosphorescent Organic Light-Emitting Diodes”

Advanced Optical Materials, 3 (2), 211-220 (2015)

Jeong-Hwan Lee, Shuo-Hsien Cheng, Seung-Jun Yoo, Hyun Shin, Jung-Hung Chang, Chih-I Wu, Ken-Tsung Wong*, and Jang-Joo Kim*

“An Exciplex Forming Host for Highly Efficient Blue Organic Light Emitting Diodes with Low Driving Voltage”

Advanced Functional Materials, 25 (3), 361-366 (2015)

2010 ~ 2014

Yang Doo Kim(+), Kyeong-Hoon Han(+), Sang-Jun Park, Jung-Bum Kim, Ju-Hyeon Shin, Jang Joo Kim, and Heon Lee

“Enhanced light extraction efficiency in organic light emitting diodes using a tetragonal photonic crystal with hydrogen silsesquioxane”

Optics Letters 39, 20, 5901 (2014)

Dae-Ho Kim, Kyu-Sik Kim, Hyun-Sub Shim, Chang-Ki Moon, Yong Wan Jin, and Jang-Joo Kim

“A high performance semitransparent organic photodetector with green color selectivity”

Applied Physics Letters 105, 213301 (2014)

Chercka Dennis, Seung-Jun Yoo, Martin Baumgarten, Jang-Joo Kim, and Klaus Mullen

“Pyrene based materials for exceptionally deep blue OLEDs”

Journal of Materials Chemistry C 2, 9083 (2014)

Jongchul Kwon(+), Tae-Min Kim(+), Hong-Se Oh, Jang-Joo Kim, Jong-In Hong

“Vacuum processable donor material based on dithieno[3,2-b:2′,3′-d]thiophene and pyrene for efficient organic solar cells”

RSC Advances 4, 24453 (2014)

Hui-Jun Yun(+), Kwon-Hyeon Kim(+), So-hee Kang, Jang-Joo Kim, Yun-Hi Kim

“Deep-Blue Phosphorescent Emitters with Phosphoryl Groups for Organic Light-Emitting Diodes by Solution Processes”

Israel Journal of Chemistry 54, 993 (2014)

Hyun-Sub Shim, Jung-Hung Chang, Chih-I. Wu, Jang-Joo Kim

“Effect of different p-dopants in an interconnection unit on the performance of tandem organic solar cells”

Organic Electronics 15, 1805 (2014)

Jihun Kim(+), Hyun-Sub Shim(+), Horim Lee, Min-Soo Choi, Jang-Joo Kim, and Yongsok Seo

“Highly Efficient Vacuum-Processed Organic Solar Cells Containing Thieno[3,2-b]thiophene-thiazole”

The Journal of Physical Chemistry C 118, 11559 (2014)

Hyun Hwi Lee, Ji Whan Kim, Jang-Joo Kim, Hyo Jung Kim

“Temperature and interfacial buffer layer effects on the nanostructure in a copper(II) phthalocyanine: Fullerene bulk heterojunction”

Materials Research Bulletin 58, 102 (2014)

Kwon-Hyeon Kim, Sunghun Lee, Chang-Ki Moon, Sei-Yong Kim, Young-Seo Park, Jeong-Hwan Lee, Jin Woo Lee, June Huh, Youngmin You, Jang-Joo Kim

“Phosphorescent dye-based supramolecules for high-efficiency organic light-emitting diodes”

Nature Communications 5, 4769 (2014)

Jung-Bum Kim, Jeong-Hwan Lee, Chang-Ki Moon, Kwon-Hyeon Kim, Jang-Joo Kim

“Highly efficient inverted top emitting organic light emitting diodes using a horizontally oriented green phosphorescent emitter”

Organic Electronics 15, 2715 (2014)

Tae-Min Kim, Hyo Jung Kim, Hyun-Sub Shim, Min-Soo Choi, Ji Whan Kim and Jang-Joo Kim

“The epitaxial growth of lead phthalocyanine on copper halogen compounds as the origin of templating effects”

Journal of Materials Chemistry A 2, 8730 (2014)

Thota Giridhar(+), Jeong-Hwan Lee(+), Woosum Cho, Hyunyoung Yoo, Chang-Ki Moon, Jang-Joo Kim, Sung-Ho Jin

“Highly efficient bluish green phosphorescent organic light-emitting diodes based on heteroleptic iridium(III) complexes with phenylpyridine main skeleton”

Organic Electronics 15, 1687 (2014)

Sunghun Lee, Hyun Shin, Jang-Joo Kim

“High-efficiency Orange and Tandem White Organic Light-emitting Diodes Using Phosphorescent Dyes with Horizontally Oriented Emitting Dipoles”

Advanced Materials 26, 5864 (2014)

Jin Won Sun(+), Jeong-Hwan Lee(+), Chang-Ki Moon, Kwon-Hyeon Kim, Hyun Shin and Jang-Joo Kim

“A Fluorescent Organic Light Emitting Diode with 30% External Quantum Efficiency”

Advanced Materials 26, 5684 (2014)

Hyun Shin(+), Sunghun Lee(+), Kwon-Hyeon Kim, Chang-Ki Moon, Seung-Jun Yoo, Jeong-Hwan Lee and Jang-Joo Kim

“Blue Phosphorescent Organic Light Emitting Diodes using an Exciplex Forming Co-host with the External Quantum Efficiency of Theoretical Limit”

Advanced Materials 26, 4730 (2014)

Kwon-Hyeon Kim, Chang-Ki Moon, Jeong-Hwan Lee, Sei-Yong Kim and Jang-Joo Kim

“Highly Efficient Organic Light-Emitting Diodes with Phosphorescent Emitters Having High Quantum Yield and Horizontal Orientation of Transition Dipole Moments”

Advanced Materials 26, 3844 (2014)

Sohee Jeon, Jun-ho Jeong, Young Seok Song, Won-Ik Jeong, Jang-Joo Kim and Jae Ryoun Youn

“Vacuum nano-hole array embedded organic light emitting diodes”

Nanoscale 6, 2642 (2014)

Jeong-Hwan Lee, Sunghun Lee, Seung-Jun Yoo, Kwon-Hyeon Kim, Jang-Joo Kim

“Langevin and trap-assisted recombination in phosphorescent organic light emitting diodes”

Advanced Functional Materials 24, 4681 (2014)

Tae-Min Kim, Hyun-Sub Shim, Min-Soo Choi, Hyo Jung Kim and Jang-Joo Kim

“Multilayer Epitaxial Growth of Lead Phthalocyanine and C70 Using CuBr as a Templating Layer for Enhancing the Efficiency of Organic Photovoltaic Cells”

ACS Applied Materials & Interfaces 6, 4286 (2014)

Hyun-Sub Shim, Jung-Hung Chang, Seung-Jun, Yoo Chih-I Wu, Jang-Joo Kim

“Correlation of the electronic structure of an interconnection unit with the device performance of tandem organic solar cells”

Journal of Materials Chemistry A 2, 5450-5454 (2014)

Jung-Bum Kim(+), Jeong-Hwan Lee(+), Chang-Ki Moon, Jang-Joo Kim

“Highly efficient inverted top emitting organic light emitting diodes using a transparent top electrode with color stability on viewing angle”

Applied Physics Letters 104, 073301 (2014)

Seung-Jun Yoo, Jung-Hung Chang, Jeong-Hwan Lee, Chang-Ki Moon, Chih-I Wu & Jang-Joo Kim

“Formation of perfect ohmic contact at indium tin oxide/N,N’-di(naphthalene-1-yl)-N,N’-diphenyl-benzidine interface using ReO3”

Scientific Reports 4, 3902 (2014)

Sunghoon Jung(+), Sunghun Lee(+), Myungkwan Song(+), Do-Geun Kim, Dae Sung You, Jong-Kuk Kim, Chang Su Kim, Tae-Min Kim, Kwon-Hyeon Kim, Jang-Joo Kim, Jae-Wook Kang

“Extremely Flexible Transparent Conducting Electrodes for Organic Devices”

Advanced Energy Materials 4, 1300474 (2014)

Sunghun Lee(+), Seul-Ong Kim (+), Hyun Shin, Hui-Jun Yun, Kiyull Yang, Soon-Ki Kwon, Jang-Joo Kim, and Yun-Hi Kim

“Deep-Blue Phosphorescence from Perfluoro Carbonyl-Substituted Iridium Complexes”

JACS 135, 38 (2013)

Jung-Bum Kim, Jeong-Hwan Lee, Chang-Ki Moon, Sei-Yong Kim, Jang-Joo Kim

“Highly Enhanced Light Extraction from Surface Plasmonic Loss Minimized Organic Light-Emitting Diodes”

Advanced Materials 25, 3571 (2013)

Young-Seo Park, Sunghun Lee, Kwon-Hyeon Kim, Sei-Yong Kim, Jeong-Hwan Lee, Jang-Joo Kim

“Exciplex-Forming Co-host for Organic Light-Emitting Diodes with Ultimate Efficiency”

Advanced Functional Materials 23, 4914 (2013)

Hyun-Sub Shim, Sei-Yong Kim, Ji Whan Kim, Tae-Min Kim, Chang-Heon Lee, Jang-Joo Kim

“An efficient interconnection unit composed of electron-transporting layer/metal/p-doped hole-transporting layer for tandem organic photovoltaics”, Applied Physics Letter 102, 203903 (2013)

Seung-Jun Yoo, Jeong-Hwan Lee, Jae-Hyun Lee, and Jang-Joo Kim

“Doping-concentration-dependent hole mobility in a ReO3 doped organic semiconductor of 4,4′,4″-tris(N-(2-naphthyl)-N-phenyl-amino)- triphenylamine”

Applied Physics Letter 102, 183301 (2013)

Ran Kim(+), Sunghun Lee(+), Kwon-Hyeon Kim, Yun-Ji Lee, Soon-Ki Kwon, Jang-Joo Kim, Yun-Hi Kim

“Extremely deep blue and highly efficient non-doped organic light emitting diodes using an asymmetric anthracene derivative with a xylene unit”

Chemical Communications 49, 4664-4666 (2013)

Sunghun Lee, Daniel Limbach, Kwon-Hyeon Kim, Seung-Jun Yoo, Young-Seo Park, Jang-Joo Kim

“High efficiency and non-color-changing orange organic light emitting diodes with red and green emitting layers”

Organic Electronics 14, 7, 1856-1860 (2013)

Sunghun Lee, Kwon-Hyeon Kim, Daniel Limbach, Young-Seo Park, Jang-Joo Kim

“Low Roll-Off and High Efficiency Orange Organic Light Emitting Diodes with Controlled Co-Doping of Green and Red Phosphorescent Dopants in an Exciplex Forming Co-Host”

Advanced Functional Materials 23, 4105 (2013)

Cholho Lee, Jang-Joo Kim

“Enhanced Light Out-Coupling of OLEDs with Low Haze by Inserting Randomly Dispersed Nanopillar Arrays Formed by Lateral Phase Separation of Polymer Blends”

Small 9, 22, 3858 (2013)

Young-Seo Park, Kwon-Hyeon Kim, Jang-Joo Kim

“Efficient triplet harvesting by fluorescent molecules through exciplexes for high efficiency organic light-emitting diodes”

Applied Physics Letter 102, 153306 (2013)

Jeong-Hwan Lee, Jang-Joo Kim

“Electron injection and transport for high-performance inverted organic light-emitting diodes”

Journal of Information Display 14, pp 39-48

Yang-Eun Lee, Sei-Yong Kim, Won-Ik Jeong and Jang-Joo Kim

“Microcavity tandem solar cells with a short circuit current higher than single cells”

Solar Energy Materials & Solar Cells 114, 59 (2013)

Sei-Yong Kim, Won-Ik Jeong, Christian Mayr, Yong-Seo Park, Kwon-Hyeon Kim, Jeong-Hwan Lee, Chang-Ki Moon, Wolfgang Brutting and Jang-Joo Kim

“Organic Light-Emitting Diodes with 30% External Quantum Efficiency Based on a Horizontally Oriented Emitter”

Advanced Functional Materials 23, 3896 (2013)

Sei-Yong Kim, Jeong-Hwan Lee, Hyun-Sub Shim and Jang-Joo Kim

“Optical analysis of ogranic photovoltaic cells incorporating graphene as a transparent electrode”

Organic Electronics 14, 6, 1496 (2013)

Hyong-Jun Kim, Cheng-Guo An and Jang-Joo Kim

“Degradation mechanism of green phosphorescent dye doped polymer light-emitting diodes”

Thin Solid Films 531, 419 (2013)

Yong-Hee Shin, Sin-Bi Kang, Sunghun Lee, Jang-Joo Kim and Han-Ki Kim

“Near infra-red transparent Mo-doped In2O3 by hetero targets sputtering for phosphorescent organic light emitting diodes”

Organic Electronics 14, 926 (2013)

Hyo Jung Kim(+), Jeong-Hwan Lee(+), Ji Whan Kim, Sunghun Lee, JunHyuk Jang, Hyun Hwi Lee and Jang-Joo Kim

“Molecular alignment and nanostructure of 1,4,5,8,9,11-hexaazatriphenylene-hexanitrile (HATCN) thin films on organic surfaces”

Journal of Materials Chemistry C 1, 1260 (2013)

Ji Whan Kim, Hyo Jung Kim, Tae-Min Kim, Tae Gun Kim, Jeong-Hwan Lee, Jeong Won Kim and Jang-Joo Kim

“High performance Organic Planar Heterojunction Solar cells by controlling the Molecular orientation”

Current Applied Physics 13 (2013)

Dae-Ho Kim, Tae-Min Kim, Won-Ik Jeong, and Jang-Joo Kim, “Rhenium oxide as an efficient p-dopant to overcome S-shaped current density-voltage curves in organic photovoltaics with a deep highest occupied molecular orbital level donor layer”, Appl. Phys. Lett. 101, 153303 (2012)

Chul Young Kim(+), Dong-Gwang Ha(+), Hyun-Hee Kang, Hui-Jun Yun, Soon-Ki Kwon, Jang-Joo Kim and Yun-Hi Kim, “Synthesis and Characterization of New Blue Light Emitting Iridium Complexes Containing a Trimethylsilyl Group” Journal of Materials Chemistry 22, 22721 (2012)

Tae-Min Kim(+), Ji Whan Kim(+), Hyun-Sub Shim and Jang-Joo Kim, “High efficiency and high photo-stability zinc-phthalocyanine based planar heterojunction solar cells with a double interfacial layer” Applied Physics Letter 101, 113301 (2012)

Sung-Hoon Jung, Jang-Joo Kim, Hyong-Jun Kim, “High performance inkjet printed phosphorescent organic light emitting diodes based on small molecules commonly used in vacuum processes”, Thin Solid Films 520 (2012) 6954-6958

Sin-Bi Kang, Jong-Wook Lim, Sunghun Lee, Jang-Joo Kim and Han-Ki Kim, “Transparent indium oxide films doped with high Lewis acid strength Ge dopant for phosphorescent organic light-emitting diodes”, J. Phys. D: Appl. Phys. 45 (2012) 325102

Jong-Wook Lim, Seong Jun Kang, Sunghun Lee, Jang-Joo Kim, and Han-Ki Kim, “Transparent Ti-In-Sn-O multicomponent anodes for highly efficient phosphorescent organic light emitting diodes”, JOURNAL OF APPLIED PHYSICS 112, 023513 (2012)

Sunghun Lee, Jeong-Hwan Lee, Kwon Hyeon Kim, Seung-Jun Yoo, Tae Gun Kim, Jeong Won Kim and Jang-Joo Kim, “Determination of the interface energy level alignment of a doped organic hetero-junction using capacitance-voltage measurements” Organic Electronics Volume 13, Issue 11, November 2012, Pages 2346-2351

Jae-Hyun Lee and Jang-Joo Kim, “Interfacial doping for efficient charge injection in organic semiconductors (Feature Article)” Physica Status Solidi A 209, No. 8, 1399-1413 (2012)

Jeong-Hwan Lee(+), Sunghun Lee(+), Jung-Bum Kim, JunHyuk Jang and Jang-Joo Kim, “A high performance transparent inverted organic light emitting diode with 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile as an organic buffer layer” Journal of Materials Chemistry 2012, 22, 15262-15266

Jongchul Kwon, Jung-Pyo Hong, Seunguk Noh, Tae-Min Kim, Jang-Joo Kim, Changhee Lee, Seonghoon Lee and Jong-In Hong, “Pyrene end-capped oligothiophene derivatives for organic thin-film transistors and organic solar cells”

New Journal of Chemistry 2012, 36, 1813-1818

Hyo Jung Kim, Hyun-Sub Shim, Ji Whan Kim, Hyun Hwi Lee and Jang-Joo Kim,

“CuI interlayer in lead phthalocyanine thin films enhance near-infrared light absorption”

Applied Physics Letter 100, 263303, 2012

Hyo Jung Kim, Ji Whan Kim, Hyun-Hwi Lee, Byeongdu Lee and Jang-Joo Kim,

“Initial Growth Mode, Nanostructure, and Molecular Stacking of a ZnPc:C60 Bulk Heterojunction”

Advanced Functional Materials, 22, 20, 4244-4248 (2012)

Won-Ik Jeong, Yang Eun Lee, Hyun-Sub Shim, Tae-Min Kim, Sei-Yong Kim and Jang-Joo Kim,

“Photoconductivity of C60 as an Origin of Bias-Dependent Photocurrent in Organic Photovoltaics”

Advanced Functional Materials Volume 22, Issue 14, pages 3089-3094, July 24, 2012

Hyun-Sub Shim, Hyo Jung Kim, Ji Whan Kim, Sei-Yong Kim, Won-Ik Jeong, Tae-Min Kim and Jang-Joo Kim,

“Enhancement of near-infrared absorption with high fill factor in lead phthalocyanine-based organic solar cells”

Journal of Materials Chemistry, 22, 9077 (2012)

Sei-Yong Kim and Jang-Joo Kim, “Outcoupling efficiency of organic light emitting diodes employing graphene as the anode” Organic Electronics, 13, 1081 (2012)

Hyo Jung Kim, Hyun Hwi Lee, Ji Whan Kim, Junhyuk Jang and Jang-Joo Kim,

“Surface dependent thermal evolution of the nanostructures in ultra-thin copper(Ⅱ) phthalocyanine films”

Journal of Materials Chemistry, 22, 8881, 2012

Sei-Yong Kim, Jeong-Hwan Lee, Jae-Hyun Lee and Jang-Joo Kim,

“High contrast flexible organic light emitting diodes under ambient light without sacrificing luminous efficiency”

Organic Electronics, 13, 826, 2012

Sung-Hwan Choi, Jun-Hyuk Jang, Jang-Joo Kim, and Min-Koo Han,

“Low-Temperature Organic (CYTOP) Passivation for Improvement of Electric Characteristics and Reliability in IGZO TFTs”,

IEEE ELECTRON DEVICE LETTERS, VOL. 33, NO. 3, MARCH 2012

Xu Lin , Shiki Yagai , Akihide Kitamura, Dong Ryeol Hwang, Soo Young Park, Young-Seo Park, Jang-Joo Kim, Takashi Karatsu,

“Small molecular host based on carbazole and m-terphenyl derivatives for efficient solution processed organic light-emitting diodes”,

Synthetic Metals 162 (2012) 303-308

Jeong-Hwan Lee, Ji Whan Kim, Sei-Yong Kim, Seung-Jun Yoo, Jae-Hyun Lee, Jang-Joo Kim,

“An organic p-n junction as an efficient and cathode independent electron injection layer for flexible inverted organic light emitting diodes”,

Organic Electronics 13 (2012) 545-549

Sunghun Lee, Jeong-Hwan Lee, Jae-Hyun Lee, Jang-Joo Kim,

“The Mechanism of Charge Generation in Charge-Generation Units Composed of p-Doped Hole-Transporting Layer/HATCN/n-Doped Electron-Transporting Layers”

Advanced Functional Materials, 2012, 22, 855-860

Ki Ho So, Ran Kim, Hyuntae Park, Il Kang, K. Thangaraju, Young Seo Park, Jang Joo Kim, Soon-Ki Kwon, Yun-Hi Kim,

“Synthesis and characterization of a new iridium(III) complex with bulky trimethylsilylxylene and applications for efficient yellow-green emitting phosphorescent organic light emitting diodes”,

Dyes and Pigments Volume 92, Issue 1, January 2012, Pages 603-609

J.-J. Kim, M.-K. Han, Y.-Y. Noh, “Flexible OLEDs and organic electronics”,

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 26, 030301, 2011

J.-Y. Jung, Y. Zhou, J.-W. Kim, J.-J. Kim, J. Yoon,

“Novel electron-transport materials containing three-coordinate boron atom with high hole-blocking ability”,

ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 242, 2011

Chang-Lyoul Lee, Rupasree Ragini Das and Jang-Joo Kim,

“Effects of Symmetry of Ir (III) Complex on the Photophysical Properties and Device Performances”,

Molecular Crystals and Liquid Crystals Volume 550, Issue 1, 2011, 284-293

Young-Seo Park, Won-Ik Jeong and Jang-Joo Kim,

“Energy Transfer from Exciplexes to Dopants and Its Effect on Efficiency of Organic Light-Emitting Diodes”,

Journal of Applied Physics, 110, 124519 (2011)

Jeong-Hwan Lee, Po-Sheng Wang, Hyung-Dol Park, Chih-I Wu, Jang-Joo Kim,

“A high performance inverted organic light emitting diode using an electron transporting material with low energy barrier for electron injection”,

Organic Electronics Volume 12, Issue 11, November 2011, Pages 1763-1767

Seul-Ong Kim, Qinghua Zhao, K. Thangaraju, Jang Joo Kim, Yun-Hi Kim, Soon-Ki Kwon,

“Synthesis and characterization of solution-processable highly branched iridium (III) complex cored dendrimer based on tetraphenylsilane dendron for host-free green phosphorescent organic light emitting diodes”,

Dyes and Pigments, Volume 90, Issue 2, August 2011, Pages 139-145

Hyo Jung Kim, Ji Whan Kim, Jang-Joo Kim,

“Invited Paper: Nanostructures of a Mixed Donor and Acceptor Layer in Organic Photovoltaics”,

Electronic Materials Letters, 7, 93-104 (2011)

Hyo Jung Kim, Ji Whan Kim, Hyun Hwi Lee, Tae-Min Kim, Junhyuk Jang, Jang-Joo Kim,

“Grazing Incidence Small-Angle X-ray Scattering Analysis of Initial Growth of Planar Organic Molecules Affected by Substrate Surface Energy”,

The Journal of Physical Chemistry Letters, 2, 1710-1714 (2011)

Dae Hwan Oh , Qinghua Zhao, Seul-ong Kim, Hyuntae Park, Yun-Hi Kim, Young-Seo Park, Jang-Joo Kim, Soon-Ki Kwon

“Synthesis and device performance of new efficient blue copolymers containing biphenylenevinylene and triphenyldiamine”,

Macromolecular Research, 19, 629-634 (2011)

Hadayat Ullah Khan, Junhyuk Jang, Jang-Joo Kim, Wolfgang Knoll,

“Effect of Passivation on the Sensitivity and Stability of Pentacene Transistor Sensors in Aqueous Media”,

Biosensors and Bioelectronics, 26, 4217 (2011)

Ji Whan Kim(+), Hyo Jung Kim(+), Hyun Hwi Lee, Taemin Kim, and Jang-Joo Kim,

“Formation of bulk heterojunctions by alternative thermal deposition and its structure analysis for high efficiency small molecular organic photovoltaics”,

Advanced Functional Materials, 21, 2067 (2011)

Jae-Hyun Lee, Hyun-Mi Kim, Ki-Bum Kim, Ryota Kabe, Pavel Anzenbacher Jr, and Jang-Joo Kim

“Homogeneous dispersion of organic p-dopants in an organic semiconductor as an origin of high charge generation efficiency”,

Applied Physics Letters, 98, 173303 (2011)

Jae-Hyun Lee, Hyun-Mi Kim, Ki-Bum Kim, and Jang-Joo Kim,

“Origin of charge generation efficiency of metal oxide p-dopants in organic semiconductors”

Organic Electronics, 12, 950-954 (2011)

Hadayat Ullah Khan, Junhyuk Jang, Jang-Joo Kim, and Wolfgang Knoll,

“In Situ Antibody Detection and Charge Discrimination Using Aqueous Stable Pentacene Transistor Biosensors”,

Journal of the American Chemical Society, 133, 2170-2176 (2011)

Won-Ik Jeong, Jane Lee, Sun-Young Park, Jae-Wook Kang and Jang-Joo Kim

“Reduction of Collection Efficiency of Charge Carriers with Increasing Cell Size in Polymer Bulk Heterojunction Solar Cells”,

Advanced Functional Materials, 21, 343-347 (2011)

Younhee Lim, Young-Seo Park, Yerang Kang, Do Young Jang, Joo Hyun Kim, Jang-Joo Kim, Alan Sellinger, and Do Y. Yoon,

“Hole Injection/Transport Materials Derived from Heck and Sol-Gel Chemistry for Application in Solution-Processed Organic Electronic Devices”,

Journal of the American Chemical Society, 133, 1375-1382 (2011)

Chang-Lyoul Lee, Rupasree Ragini Das, and Jang-Joo Kim,

“Synthesis and characterization of bis-orthometalated Ir(III) complex consisting of non-carbon-coordinating ligand”,

Molecular Crystals and Liquid Crystals, 531, 40-46 (2010)

Dong-Seok Leem, Sungsoo Kim, Ji Whan Kim, Jung Inn Sohn, Angharad Edwards, Jingsong Huang, Xuhua Wang, Jang-Joo Kim, Donal D. C. Bradley, and John C. deMello

“Rapid Patterning of Single-Wall Carbon Nanotubes by Interlayer Lithography”,

Small, 6, 2530-2534 (2010)

Hwan-Hee Cho, Boik Park, Hyong-Jun Kim, Jongyoup Shim, Sohee Jeon, Jun-ho Jeong and Jang-Joo Kim

“Planarization of Nanopatterned Substrates Using Solution Process to Enhance Outcoupling Efficiency of Organic Light Emitting Diodes”,

Current Applied Physics, 10, e139-e142 (2010)

Hyong-Jun Kim, Myeong-Jun Kim, Hyung-Dol Park, Jae-Hyun Lee, Si Tae Noh, Young-Chul Lee, Jang-Joo Kim,

“Near-IR electromer emission from new ambipolar carbazole containing phosphorescent dendrimer based organic light emitting diode”,

Synthetic Metals, 160, 1994-1999 (2010)

Hyeon-Gu Jeon, Jang-Joo Kim,

“Magnetic field induced grain growth of perylene polycrystalline films”,

Organic Electronics, 11, 1723-1728 (2010)

Dong-Seok Leem, Ji Whan Kim, Sung Ouk Jung, Seul-Ong Kim, Se Hoon Kim, Kee Young Kim, Yun-Hi Kim, Soon-Ki Kwon, Jang-Joo Kim,

“Efficient and color stable hybrid white organic light-emitting diodes utilizing electron-hole balanced spacers”,

Journal of Physics D: Applied Physics, 43, 405102 (2010)

Ying Zhou(+), Ji Whan Kim(+), Raju Nandhakumar, Min Jung Kim, Eunae Cho, Youn Soo Kim, Yoon Hee Jang, Chongmok Lee, Seungwu Han, Kwan Mook Kim, Jang-Joo Kim and Juyoung Yoon

“Novel Binaphthyl-Containing Bi-Nuclear Boron Complex with Low Concentration Quenching Effect for Efficient Organic Light-Emitting Diodes”,

Chemical Communications, 46, 6512-6514 (2010)

Jane Lee, Sei-Yong Kim, Changsoon Kim, Jang-Joo Kim,

“Enhancement of the short circuit current in organic photovoltaic devices with microcavity structure”,

Applied Physics Letters, 97, 083306 (2010)

Sei-Yong Kim, Dong-Seok Leem, Jang-Joo Kim,

“Estimation of the mean emission zone in phosphorescent organic light-emitting diodes with a thin emitting layer”

Optics Express, 18, 16715-16721 (2010)

Hwan-Hee Cho, Boik Park, Hyong-Jun Kim, Sohee Jeon, Jun-ho Jeong and Jang-Joo Kim,

“Solution Processed Photonic Crystals to Enhance the Light Outcoupling Efficiency of Organic Light Emitting Diodes”,

Applied Optics, 49, 4024-4028 (2010)

Sei-Yong Kim, Jang-Joo Kim,

“Outcoupling efficiency of organic light emitting diodes and the effect of ITO thickness”,

Organic Electronics, 11, 1010-1015 (2010)

Sun-Young Park(+), Won-Ik Jeong(+), Do-Geun Kim, Jong-Kuk Kim, Dong Chan Lim, Joo Hyun Kim, Jang-Joo Kim, Jae-Wook Kang,

“Large-area organic solar cells with metal subelectrode on indium tin oxide anode”,

Applied Physics Letters, 96, 173301 (2010)

Ali Ozhan Altun, Sohee Jeon, Jongyoup Shim, Jun-Ho Jeong, Dae-Geun Choi, Ki-Don Kim, Jun-Hyuk Choi, Soon-Won Lee, Eung-Sug Lee, Hyung-Dol Park, Jae R. Youn, Jang-Joo Kim, Yong-Hee Lee, Jae-Wook Kang,

“Corrugated organic light emitting diodes for enhanced light extraction”,

Organic Electronics, 11, 711-716 (2010)

Hoe-Joo Seo(+), Kyung-Mo Yoo(+), Myungkwan Song, Jin Su Park, Sung-Ho Jin, Young Inn Kim, Jang-Joo Kim,

“Deep-Blue Phosphorescent Iridium Complexes with Picolinic acid N-Oxide as the Ancillary Ligand for High Efficiency Organic Light-Emitting Diodes”,

Organic Electronics, 11, 564-572 (2010)

Ying Zhou(+), Ji Whan Kim(+), Min Jung Kim, Won-Joon Son, Su Jung Han, Ha Na Kim, Seungwu Han, Youngmee Kim, Chongmok Lee, Sung-Jin Kim, Dong Ha Kim, Jang-Joo Kim, Juyoung Yoon,

“Novel Bi-Nuclear Boron Complex with Pyrene Ligand: Red-Light Emitting as well as Electron Transporting Material in Organic Light-Emitting Diodes”,

Organic Letters, 12, 1272-1275 (2010) (It has been highlighted by “Noteworthy Chemistry”)

Jae-Hyun Lee, Dong-Seok Leem, Jang-Joo Kim,

“Effect of host organic semiconductors on electrical doping”,

Organic Electronics, 11, 486-489 (2010)

Bong Joon Lee, Hyo Jung Kim, Won-Ik Jeong, Jang-Joo Kim,

“A transparent conducting oxide as an efficient middle electrode for flexible organic tandem solar cells”,

Solar Energy Materials and Solar Cells, 94, 542-546 (2010)

2005 ~ 2009

Chang-Lyoul Lee, Sung-Wook Nam, Viena Kim, Jang-Joo Kim, and Ki-Bum Kim,

“Electroluminescence from monolayer of quantum dots formed by multiple dip-coating processes”, Physica Status Solidi B, 246, 803-807 (2009)

Dong-Seok Leem, Sung Ouk Jung, Seul-Ong Kim, Jong-Won Park, Ji Whan Kim, Young-Seo Park, Yun-Hi Kim, Soon-Ki Kwon and Jang-Joo Kim,

“Highly efficient orange organic light-emitting diodes using a novel iridium complex with imide group-containing ligands”, Journal of Materials Chemistry, 19, 8824-8828 (2009)

Hyo Jung Kim, Jae Hwa Park, Hyun Hwi Lee, Dong Ryeol Lee, Jang-Joo Kim,

“The effect of Al electrodes on the nanostructure of poly(3-hexylthiophene):fullerene solar cell blends during thermal annealing”, Organic Electronics, 10, 1505-1510 (2009)

Jae Jin Kim, Youngmin You, Young-Seo Park, Jang-Joo Kim and Soo Young Park,

“Dendritic Ir(III) Complexes Functionalized with Triphenylsilylphenyl Groups: Synthesis, DFT Calculation and Comprehensive Structure-Property Correlation”, Journal of Materials Chemistry, 19, 8347 – 8359 (2009)

Dong-Seok Leem, Sei-Yong Kim , Jae-Hyun Lee, Jang-Joo Kim,

“High efficiency p-i-n top-emitting organic light-emitting diodes with a nearly Lambertian emission pattern”, Journal of Applied Physics, 106, 063114 (2009)

Moussa Saleh, Young-Seo Park, Martin Baumgarten, Jang-Joo Kim, Klaus Mullen,

“Conjugated Triphenylene Polymers for Blue OLED Devices”, Macromolecular Rapid Communication, 30, 1279-1283 (2009)

Hyo Jung Kim, Hyun Hwi Lee, Jang-Joo Kim,

“Real time investigation of the interface between P3HT:PCBM layer and Al electrode during thermal annealing”, Macromolecular Rapid Communication, 30, 1269-1273 (2009)

Frederic Laquai, Young-Seo Park, Jang-Joo Kim, Thomas Basche,

“Excitation energy transfer in organic materials: From fundamentals to optoelectronic devices”, Macromolecular Rapid Communication, 30, 1203-1231 (2009)

Seungjun Chung, Jae-Hyun Lee, Jaewook Jeong, Jang-Joo Kim, Yongtaek Hong,

“Substrate thermal conductivity effect on heat dissipation and lifetime improvement of organic light-emitting diodes”, Applied Physics Letter, 94, 253302 (2009)

Mei-Hsin Chen, Yu-Hung Chen, Chang-Tin Lin, Guan-Ru Lee, Chih-I Wu, Dong-Seok Leem, Jang-Joo Kim, Tun-Wen Pi,

“Electronic and chemical properties of cathode structures using 4,7-diphenyl-1,10-phenanthroline doped with rubidium carbonate as electron injection layers”, Journal of Applied Physics, 105, 113714 (2009)

Byoung-Kuk Lee and Jang-Joo Kim,

“Enhanced efficiency of dye-sensitized solar cells by UV-O3 treatment of TiO2 layer”, Current Applied Physics 9, 404-408 (2009)

Jae-Hyun Lee, Dong-Seok Leem, Hyong-Jun Kim, and Jang-Joo Kim,

“Effectiveness of p-dopants in an organic hole transporting material”, Applied Physics Letter, 94, 123306 (2009)

Jinwoo Kim, Junhee Cho, Seungjun Chung, Jeonghun Kwak, Changhee Lee, Yongtaek Hong, Jang-Joo Kim,

“Inkjet-Printed Silver Gate Electrode and Organic Dielectric Materials for Bottom-Gate Pentacene Thin-Film Transistors”, Journal of the Korean Physical Society, 54, 518 (2009)

Dong-Seok Leem, Sei-Yong Kim, Jang-Joo Kim, Mei-Hsin Chen, and Chih-I Wu,

“Rubidium-Carbonate-Doped 4,7-Diphenyl-1,10-phenanthroline Electron Transporting Layer for High-Efficiency p-i-n Organic Light Emitting Diodes”, Electrochemical and Solid-State Letters, 12, J8-J10 (2009)

Won-Ik Jeong, Sei Yong Kim, Jang-Joo Kim, and Jae Wook Kang,

“Thickness dependence of PL efficiency of organic thin films”, Chemical Physics 355, 25-30 (2009)

Seung Joon Lee, Jin Su Park, Kyung-Jin Yoon, Young-Inn Kim, Sung-Ho Jin, Sung Kwon Kang, Yeong-Soon Gal, Sunwoo Kang, Jin Yong Lee, Jae-Wook Kang, Se-Hyung Lee, Hyung-Dol Park, and Jang-Joo Kim,

“High-Efficiency Deep-Blue Light-Emitting Diodes Based on Phenylquinoline/Carbazole-Based Compounds”, Advanced Functional Materials, 18, 3922-3930 (2008)

Kim, J., Jeong, J., Park, S.J., Kwon, S.-K., Kim, J.-J., Hong, Y.

“All-solution-processed Organic thin-film transistors using inkjet-printed silver electrodes”, ECS Transactions 16, 225-230 (2008)

Dong-Seok Leem, Jae-Hyun Lee, Jang-Joo Kim, and Jae-Wook Kang

“Highly efficient tandem p-i-n organic light-emitting diodes adopting a low temperature evaporated rhenium oxide interconnecting layer”, Applied Physics Letter, 93, 103304 (2008)

Myoung-Chul Um, Junhyuk Jang, Jung-Pyo Hong, Jihoon Kang, Do Yeung Yoon, Seong Hoon Lee, Jang-Joo Kim and Jong-In Hong,

“Organic thin-film transistors based on 2,6-bis(2-arylvinyl)anthracene: high-performance organic semiconductors”, New Journal of Chemistry, 32, 2006-2010 (2008)

Song Se-Yong, Kim Kang-Su, Lee Young-Bin, Kwak Jin-Sung, Eun-Kyung Kim, Cho Yong-Kuk, Soon-Ki Kwon, Qinghua Zhao, Won-Ik Jung, Jang-Joo Kim, Yun-Hi Kim

“Synthesis and Characterization of Novel Poly(arylenevinylene) Derivative”, Journal of Applied Polymer Science, 110, 2009-2015 (2008)

Kwang-Hyuk Choi, Jin-A Jeong, Han-Ki Kim, Jae-Young Lee, Jung-Hwan Lee, Hyo-Dae Bae, Yoon-Heong Tak, Se-Hyung Lee, Dong-Seok Leem, and Jang-Joo Kim,

“Characteristics of Ni-Doped IZO Layers Grown on IZO Anode for Enhancing Hole Injection in OLEDs”, Journal of The Electrochemical Society, 155, J340-J344 (2008)

Nam Su Kang, Byeong-Kwon Ju, Ji Whan Kim, Jang-Joo Kim, Jae-Woong Yu, and Byung Doo Chin,

“Correlation of photoluminescent quantum efficiency and device characteristics for the soluble electrophosphorescent light emitter with interfacial layers”, Journal of Applied Physics, 104, 024511 (2008)

S.-W. Cho, J.-A. Jeong, J.-H. Bae, J.-M. Moon, K.-H. Choi, S.W. Jeong, N.-J. Park, J.-J. Kim, S.H. Lee, J.-W. Kang, M.-S. Yi, and H.-K. Kim,

“Highly flexible, transparent, and low resistance indium zinc oxide-Ag-indium zinc oxide multilayer anode on polyethylene terephthalate substrate for flexible organic light light-emitting diodes”, Thin Solid Films, 516, 7881-7885 (2008)

Jong Won Chung, Byeong-Kwan An, Ji Whan Kim, Jang-Joo Kim and Soo Young Park,

“Self-assembled perpendicular growth of organic nanoneedles via simple vapor-phase deposition: one-step fabrication of a superhydrophobic surface”, Chemical Communications, 2008, 2998-3000

Jae-Hyun Lee, Dong-Seok Leem, Jang-Joo Kim,

“High performance top-emitting organic light-emitting diodes with copper iodide-doped hole injection layer”, Organic Electronics, 9, 805-808 (2008)

Young-Seo Park, Jae-Wook Kang, Dong Min Kang, Jong-Won Park, Yoon-Hi Kim, Soon-Ki Kwon, and Jang-Joo Kim,

“Efficient, color stable white organic light-emitting diode based on high energy level yellowish-green dopants”, Advanced Materials, 20, 1957-1961 (2008)

Dong Min Kang, Jae-Wook Kang, Jong Won Park, Sung Ouk Jung, Se-Hyung Lee, Hyung-Dol Park, Yun-Hi Kim, Sung Chul Shin, Jang-Joo Kim and Soon-Ki Kwon,

“Iridium Complexes with Cyclometalated 2-Cycloalkenyl-Pyridine Ligands as Highly Efficient Emitters for Organic Light-Emitting Diodes”, Advanced Materials, 20, 2003-2007 (2008)

Sohee Jeon, Jae-Wook Kang, Hyung-Dol Park, Jang-Joo Kim, Jae R. Youn, Jongyoup Shim, Jun-ho Jeong, Dae-Geun Choi, Ki-Don Kim, Ali Ozhan Altun, Se-Heon Kim, and Yong-Hee Lee,

“Ultraviolet nanoimprinted polymer nanostructure for organic light emitting diode application”, Applied Physics Letters, Vol. 92, pp.223307 (2008)

Myoung-Chul Um, Junhyuk Jang, Jihoon Kang, Jung-Pyo Hong, Do Yeung Yoon, Seong Hoon Lee, Jang-Joo Kim and Jong-In Hong.

“High-performance organic semiconductors for thin-film transistors based on 2,6-bis(2-thienylvinyl)anthracene” J. Mater. Chem., 18, 2234-2239 (2008)

Jang, J., Kim, J.W., Park, N., Jang-Joo Kim,

“Air stable C60 based n-type organic field effect transistor using a perfluoropolymer insulator” Organic Electronics, Vol.9 (2008), pp.481-486

Kang, J.-W., Lee, D.-S., Park, H.-D., Kim, J.W., Jeong, W.-I., Park, Y.-S., Lee, S.-H., Go, K., Lee, J.-S., Jang-Joo Kim,

“A host material containing tetraphenylsilane for phosphorescent OLEDs with high efficiency and operational stability”, Organic Electronics, Vol.9 (2008), pp.452-460

Jun Ho Chi, Chang-Lyoul Lee, Jang-Joo Kim, Jin Chul Jung,

“Synthesis and light-emitting properties of a novel π-conjugated poly[di(p-phenyleneethynylene)-alt- (p-phenylenecyanovinylene)] containing n-octyloxy side branches” Journal of Applied Polymer Science, 108 (2) pp.914-922, (2008)

Bae, J.-H., Moon, J.-M., Jeong, S.W., Kim, J.-J., Kang, J.-W., Kim, D.-G., Kim, J.-K., Kim, H.-K.,

“Transparent conducting indium zinc tin oxide anode for highly efficient phosphorescent Organic Light Emitting Diodes”, Journal of the Electrochemical Society, 155 (1), pp. J1-J6. (2008)

Joo Hyun Kim, Do Yeung Yoon, Ji Whan Kim and Jang-Joo Kim,

“New host materials with high triplet energy level for blue-emitting electrophosphorescent device”, Synthetic Metals, Vol.157(18-20), pp.743-750 (2007)

Jun Ho Chi, Se Hee Park, Chang-Lyoul Lee, Jang Joo Kim, Jin Chul Jung,

“Synthesis and Light-Emitting Properties of New Polyimides Containing Ethynylene Units in the Main Chain”, Macromolecular Materials and Engineering, Vol. 292(7), pp. 844-854 (2007)

D.R. Whang, Y. You, S.H. Kim, W.-I. Jeong, Y.-S. Park, J.-J. Kim, S.Y. Park,

“A highly efficient wide-band-gap host material for blue electrophosphorescent light-emitting devices”, Applied Physics Letters, 91 (23), art. no. 233501. (2007)국제 학술지

Jae-Wook Kang, Deug-Sang Lee, Hyung-Dol Park, Young-Seo Park, Ji Whan Kim, Won-Ik Jeong, Kyung-Mo Yoo, Kyoungmoon Go, Se-Hoon Kim and Jang-Joo Kim,

“Silane- and triazine-containing hole and exiton blocking material for high-efficiency phosphorescent organic light emitting diodes”, Journal of Materials chemistry, 17, 3714-3719 (2007)

Dong-Seok Leem, Hyung-Dol Park, Jae-Wook Kang, Jae-Hyun Lee, Ji Whan Kim, and Jang-Joo Kim,

“Low driving voltage and high stability organic light-emtting diodes with rhenium oxide-doped hole transporting layer”, Applied Physics Letters, Vol. 91, (2007) 011113

Tae-Hyuk Kwon, Myoung Ki Kim, Jongchul Kwon, Dae-Yup Shin, Su Jin Park, Chang-Lyoul Lee, Jang-Joo Kim, and Jong-In Hong,

“Highly efficient light-harvesting system based on a phosphorescent acceptor coupled with dendrimer donors via singlet-singlet and triplet-triplet energy transfer”, Chem. Mater. Vol. 19, No. 15 (2007) 3673

Youngmin You, Cheng-Guo An, Jang-Joo Kim, and Soo Young Park,

“A Deep Red Phosphorescent Ir(III) Complex for Use in Polymer Light Emitting Diodes: Role of the Arylsilyl-Substituents”, Journal of Organic Chemistry, 72, 6241-6246 (2007)

Jae-Wook Kang, Se-Hyung Lee, Hyung-Dol Park, Won-Ik Jeong, Kyung-Mo Yoo, Young-Seo Park, and Jang-Joo Kim,

“Low roll-off of efficiency at high current density in phosphorescent organic light emitting diodes”, Applied Physics Letters, 90, (2007) 223508

Jong-Min Moon, Jung-Hyeok Bae, Jin-A Jeong, Soon-Wook Jeong, No-Jin Park, Han-Ki Kim, Jae-Wook Kang, Jang-Joo Kim, and Min-Su Yi,

“Enhancement of hole injection using ozone treated Ag nanodots dispersed on indium tin oxide anode for organic light emitting diodes”, Applied Physics Letters, 90, (2007) 163516

Jae-Wook Kang, Won-Ik Jeong, Jang-Joo Kim, Han-Ki Kim, Do-Geun Kim and Gun-Hwan Lee,

“High-Performance Flexible Organic Light-Emitting Diodes Using Amorphous Indium Zinc Oxide Anode”, Electrochemical and Solid-State Letters, Vol.10, No.6, (2007) J75-J78

Jung-Hyeok Bae, Jong-Min Moon, Jae-Wook Kang, Hyung-Dol Park, Jang-Joo Kim, Woon Jo Cho, and Han-Ki Kim,

“Transparent, low resistance, and flexible amorphous ZnO-doped In2O3 Anode Grown on a PES Substrate”, Journal of the Electrochemical Society, Vol. 154, (2007) J81-J85

Han-Ki Kim, Myung Soo Kim, Jae-Wook Kang, Jang-Joo Kim and Min-Su Yi,

“High-quality thin-film passivation by catalyzer-enhanced chemical vapor deposition for organic light-emitting diodes”, Applied Physics Letters, Vol. 90, (2007) 013502

Youngmin You, Cheng-Guo An, Deug-Sang Lee, Jang-Joo Kim and Soo young Park,

“Silicon-containing dendritic tris-cyclometalated Ir(III) complex and its electrophosphorescence in a polymer host”, JOURNAL OF MATERIALS CHEMISTRY , Vol.16, (2006), 4706-4713

Nam SH, Kang JW and Kim JJ,

“Direct pattering of polymer optical waveguide using liquid state UV-curable polymer”, MACROMOLECULAR RESEARCH, Vol.14, No.1 (2006), 114-116

Kim S, Seo J, Jung HK, Kim JJ and Park SY,

“White luminescence from polymer thin films containing excited-state intramolecular proton-transfer dyes”, ADVANCED MATERIALS, Vol. 17, No.17 (2005), 2077

Nam, Sung-Hyun, Kang, Jae-Wook and Kim, Jang-Joo,

“Temperature-insensitive flexible polymer wavelength filter fabricated on polymer substrates”, Applied Physics Letters, Vol.87, (2005), 233504

Ghim J, Shim HS, Shin BG, Park JH, Hwang JT, Chun C, Oh SH, Kim JJ and Kim DY,

“Isomer structure-optical property relationships for naphthalene-based poly(perfluorocyclobutyl ether)s”, MACROMOLECULES, Vol. 38, No.20 (2005), 8278-8284

Tae-Hyuk Kwon, Hyo Soon Cho, Young Ki Kim, Ji-Whan Kim, Jang-Joo Kim, Wan Hee Lee, Su Jin Park, Ik-Soo Shin, Hasuck Kim, Dong Mok Shin, Young Keun Chung, and Jong-In Hong,

“Color tuning of cyclometalated iridium complexes through modification of phenylpyrazole derivatives and ancillary ligand based on ab initio calculations”, Organometallics. Vol. 24, No.7 (2005), 1578-1585

Han-Seo Cho, Kun-Mo Chu, Sae-kyung Kang, Sung-Hwan Huang, Byung-Sup Rho, Weon-Hyo Kim, Joon-Sung Kim, Jang-Joo Kim and Hyo-Hoon Kim,

“Compact Packaging of Optical and Electronic Components for On-Board Optical Interconnects”, IEEE Transactions on Advanced Packaging, Vol. 28, No.1 (February 2005), 114

Chang-Lyoul Lee, Rupasree Ragini Das and Jang-Joo Kim,

“Polymer based blue electrophosphorescent light emitting devices”, Current Applied Physics, Vol. 5, (2005) 309-313

Jae-Wook Kang, Jae-Pil Kim, Jae-Suk Lee, and Jang-Joo Kim,

“Structure-Property Relationship of Fluorinated co-poly(arylene ether sulfide)s and co-poly(arylene ether sulfone)s for Low-loss and Low-birefringence Waveguide Devices”, IEEE J. Lightwave Technology, VOL. 23, NO. 1, JANUARY 2005, 364

2000 ~ 2004

Doojin Vak, Chaemin Chun, Chang Lyoul Lee, Jang-Joo Kim and Dong-Yu Kim,

“A novel spiro-functionalized polyfluorene derivative with solubilizing side chains”, J. Mater. Chem. (2004) 14 , 1342-1346

Sungouk Jung, Youngjin Kang, Hyung-Sun Kim, Yun-Hi Kim, Chang-Lyoul Lee, Jang-Joo Kim, Sung-Koo Lee and Soon-Ki Kwon,

“Effect of Substitution of Methyl Groups on the Luminescence Performance of Ir(III) Complexes: Preparation, Structures, Electrochemistry, Photophysical Properties and Their Applications in Organic Light-Emitting Diodes (OLEDs)”, Eur. J. Inorg. Chem. (2004) 3415-3423

X.-D. Li, Z.-X. Zhong, J.-J. Kim and M.-H. Lee,

“Novel Photosensitive Fluorinated Poly(arylene Ether) Having Zero-Birefringence”, Macromolecular Rapid Comm. (2004) 25, 1090-1094

Chang-Lyoul Lee, Rupasree Ragini Das and Jang-Joo Kim,

“Polymer-based blue electrophosphorescent light-emitting diodes using a bisorthometalated Ir (III) complex as the triplet emitter”, Chem. Mater. (2004) 16, 4642-4646

Bu-Gon Shin, Joeng-Ho Park, and Jang-Joo Kim,

“Plastic Photonic Crystal Fibers Drawn From Stacked Capillaries” J. Nonlinear Optical Physics and Materials, Vol. 13, Nos. 3&4 (2004) 519-523

Jieun Ghim, Deug-Sang Lee, Bu Gon Shin, Doojin Vak, Dong Kee Yi, Mi-Jeong Kim, Hwa-Sub Shim, Jang-Joo Kim and Dong-Yu Kim,

“Optical Properties of Perfluorocyclobutane Aryl Ether Polymers for Polymer Photonic Devices”, Macromolecules, (2004) Vol.37, No.15, 5724-5731

Jae-Wook Kang, Sehoon Kim, Soo Young Park and Jang-Joo Kim,

“All-optical polymeric interferferometric wavelength converter comprising an excited state intramolecular proton transfer dye”, Appl. Phys. Lett., Vol. 84, (2004) 4221-4223

J.-S. Kim and J.-J. Kim,

“Stacked Polymeric Multimode Waveguide Arrays for Two-Dimensional Optical Interconnects”, J. Lightwave Technol. 22(3), 840 (2004)

J.-S. Kim and J.-J. Kim,

“Fabrication of multimode polymeric waveguides and micromirrors using deep x-ray lithography”, IEEE Photonics Technology Letters, Vol. 16 (No. 3), March 2004, 798

Sung Ho Baek, Jae-Wook Kang, Xiang Dan Lia, Myung-Hoon Lee, and Jang-Joo Kim,

“Zero-birefringence photosensitive polyimides for optical waveguides”, Optics Letters 29 (3), 301-303 (February 1, 2004)

H. J. Chang, A. Kim, J. W. Wu, S. H. Han, B. Park, J. J. Kim, J. S. Lee, H. Takezoe,

“Chiral Nonlinear Optics in Oxides, Polymers and Liquid Crystals”, Journal of the Korean Physical Society, 43(4), 587-596 (2003)

B. Y. Myung, J. J. Kim and T. H. Yoon,

“Adhesion property of 12FPMDA-based polyimides containing trifluoromethyl-phenyl moiety”, J. Adhesion Science & Technology 17(12), 1669-1684 (2003)

Yong-Young Noh, Jang-Joo Kim, Yuji Yoshida and Kiyoshi Yase,

“Organic Field-Effect Transistor by a wet-transferring method”, Appl. Phys. Lett. 83, 1243-1245 (2003).

Jae-Pil Kim, Jae-Wook Kang, Jang-Joo Kim, and Jae-Suk Lee,

“Fluorinated Poly(arylene ether sulfone)s for polymer optical waveguide devices”, Polymer 44, 4189-4195 (2003).

B. Y. Myung, J. S. Kim, J. J. Kim, T. H. Yoon,

“Synthesis and characterization of novel polyimides with 2,2-bis(4(4-aminophenoxy)phenyl)phthalein-3,5′-bis(trifluoromethyl)anilide”, J. of Polymer Science, Part A: Polymer Chemistry, 41, 3361-3374, (2003)

Jae-Pil Kim, Jae-Wook Kang, Jang-Joo Kim, and Jae-Suk Lee,

“Synthesis and Optical Properties of Fluorinated Poly(arylene ether phosphine oxide)s”, J. of Polymer Science, Part A: Polymer Chemistry, 41, 1497-1503, (2003)

Bu-Gon Shin, Joeng-Ho Park, and Jang-Joo Kim,

“Low-Loss, High-Bandwidth Graded-Index Plastic Optical Fiber (GI-POF) Fabricated by the Centrifugal Deposition Method”, Applied Physics Letters, 82, 4645-4647 (2003).

Jae-Wook Kang, Mi-Jeong Kim, Jae-Pil Kim, Seong-Joo Yoo, Jae-Suk Lee, dong-Yu Kim, and Jang-Joo Kim,

“Polymeric wavelength filters using holographic surface relief gratings on azobenzene-containing polymer films”, Applied Physics Letters, 82(22), 8323-8325 (2003).

Yong-Young Noh, Jang-Joo Kim, Yuji Yoshida and Kiyoshi Yase,

“Effect of Molecular Orientation of Epitaxially Grown Platinum(II) Octaethyl Porphyrin films on The Performance of Field-Effect Transistors”, Adv. Materials. 15(9), 699-702 (2003).

Y.-Y. Noh, C.-L. Lee, K. Yase and J.-J. Kim,

“Energy transfer and device performance in phosphorescent dye doped polymer light emitting diodes”, Journal of Chemical Physics, 118(6), 2853-2864 (2003) February.

J.-S. Kim, J.-W. Kang, and J.-J. Kim,

“Simple and Low Cost Fabrication of Thermally Stable Polymeric Multimode Waveguides using a UV-curable Epoxy”, Japanese Journal of Applied Physics, Vol.42, 1277-1279 (2003).

C.-L. Lee, N.-G. Kang, Y.-S. Cho, J.-S. Lee, and J.-J. Kim,

“Polymer Electrophosphorescent Device: comparison of Phosphorescent Dye Doped and Coordinated System”, Optical Materials, Vol.21, pp.119-123, Jan. 2003.

R. R. Das, C.-L. Lee, Y.-Y. Noh, and J.-J. Kim,

“Optical and Electroluminescent Properties of a New Green Emitting Ir(III) Complex”, Optical Materials, Vol.21 pp.143-146, Jan. 2003

Jae-Pil Kim, Young-sun Cho, Jae-Wook Kang, Jang-Joo Kim, and Jae-Suk Lee,

“Hydrolysis and condensation of fluorine containing organosilicon”, Optical materials, Vol. 21, pp. 445-450, Jan. 2003

J.-W. Kang, E. Y. Kim, and J.-J. Kim,

“All-optical switch and modulator using photochromic dye doped polymer waveguides”, Optical Materials, Vol.21, pp. 543-548, Jan. 2003.

B. Y. Myung, J. J. Kim and T. H. Yoon,

“Synthesis and characterization of novel 3,6-di(3´,5´-bis(trifluoromethyl)phenyl)pyromellitic dianhydride (12FPMDA) for polyimide synthesis”, J. Polymer Science, Part A: Polymer Chemistry, 40 (23), 4217-4227 (Oct. 2002).

Myong-Hoon Lee, Xiangdan Li, Jink Yu kim, Jaewook Kang, Seongho Paek and Jang Joo Kim,

“Facile Fabrication of Polymer Waveguide by Using Photosensitive Polyimides” Mol. Cryst. Liq. Cryst., Vol.377, pp.7-12, 2002.

Jiwon Sohn, Jaehoon Hwang, Soo Young Park, Yong Young Noh, and Jang-Joo Kim,

“Charge carrier mobility and photorefractive grating buildup in bipolar organic glasses”, Appl. Phys. Lett. 81, 190, (2002)

M.-J. Kim, B.-G. Shin, J.-J. Kim, and D.-Y. Kim,

“Photoinduced supramolecular chirality in amorphous azobenzene polymer films”, Journal of the American Chemical Society, Vol.124(14), pp.3504-3505, 2002.

J.-W. Kang and J.-J. Kim,

“Low-loss and thermally stable TE-mode selective polymer waveguide using photosensitive fluorinated polyimide”, IEEE Photonics Technology Letters, Vol.14(9), pp.1297-1299, Sept. 2002.

D. J. Park, Y. Y. Noh, C. M. Chun, J.-J. Kim, and D.-Y. Kim,

“Synthesis and Characterization of a New Polyfluorene derivative with Well-defined Conjugation Length”, Molecular Crystal Liquid Crystal, Vol.377, pp.73-76 , 2002.

D. J. Park, Y. Y. Noh, J.-J. Kim, and D.-Y. Kim,

“A Thermally Stable Blue-emitting Polyspirobifluorene”, Polymer Preprints, Vol.43(1), pp.71-72, 2002.

J. W. Kang and J.-J. Kim,

“All-optical Mach-Zehnder modulator using a photochromic dye doped polymer”, Appl. Phys. Lett. Vol.80(10), pp.1710-1712, March 11. 2002.

J.-P. Kim, J. W. Kang, J.-J. Kim, and J.-S. Lee,

“Low-Loss Fluorinated Poly(arylene ether sulfide)s for Optical Waveguide Devices”, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 222, pp.U255, 2001.

J.-P. Kim, W.-Y. Lee, J.-W. Kang, S.-K. Kwon, J.-J. Kim, and J.-S. Lee,

“Fluorinated poly(arylene ether sulfide) for polymeric optical waveguide devices”, Macromolecules, Vol. 34, pp. 7817-7821, 2001.

J.-S. Lee, N.-G. Kang, Y.-S. Cho, J.-H. Ahn, C.-L. Lee and J.-J. Kim,

“Phosphorescent Copolymer of Ir-bound 2-(4-vinylphenyl)pyridine with N-Vinylcarbazole”, Polymer Preprints 2001, 42(2), pp448-449, 2001

T.-W. Lee, O. O. Park, J.-J. Kim, J.-M. Hong, and Y. C. Kim,

“Efficient Photoluminescence and Electroluminescence from Environmentally Stable Polymer/Clay Nanocomposites”, Chemistry of Mater. Vol.13(6), pp.2217-2222, May 23, 2001.

H. K. Jung, C.-L. Lee, J. K. Lee, J.-K. Kim, S. Y. Park and J.-J. Kim,

“Synthesis and properites of novel electroluminescent oligomers containing carbazolylene-vinylene-sulfonylene units for a light-emitting diode”, Thin solid Films, V.401, pp.111-117 , 2001.

J. W. Kang, J. P. Kim, W. Y. Lee, J. S. Kim, J. S. Lee, and J.-J. Kim,

“Low-Loss Fluorinated Poly(Arylene Ether Sulfide) Waveguides with High Thermal Stability”, J. Lightwave. Tech. 19(6). pp.872-875, June. 2001.

C.-L. Lee, K. B. Lee, and J.-J. Kim,

“Highly Efficient Polymer Phosphorescent Light Emitting Devices”, Mat Sci. and Engineering B. Vol.85(2-3), pp.228-231, 2001.

T.-W. Lee, O. O. Park, J.-H. Yoon, and J.-J. Kim,

“Polymer-layered silicate nanocomposite light-emitting devices”, Adv. Mater. Vol.13(3), pp.211-213, February 5, 2001.

T.-W. Lee, O. O. Park, J.-H. Yoon, and J.-J. Kim,

“Enhanced Quantum Efficiency in Polymer/Layered Silicate Nanocomposite Light Emitting Devices”, Synth. Met., Vol.121, pp.1737-1738 (2001)

J. W. Kang, J. S. Kim, and J.-J. Kim,

“Optimized Oxygen Plasma Etching of Polycarbonate for Low-Loss Optical Waveguide Fabrication”, Jpn. J. Appl. Phys. Vol.40(5A), pp.3215-3219, May 2001.

M. H. Lee, J. K. Kim, Y. S. Cheong, J. W. Kang, J.-J. Kim, and C. H. Kim,

“Photoinduced Refractive Index Modulation of Photosensitive Polyimides and Their Application in Passive Waveguide Fabrication” Mol. Cryst. Liq. Cryst. Vol.371, pp.419-422 (2001).

J.-W. Kang, Y.-D. Shin, J.-S. Lee, J.-J. Kim, S. H. Han and J. W. Wu,

“Induced chirality in a polyisocyanate polymeric film and the polarization rotation change under an external electric field”, J. Am. Opt. Soc. B, Vol.18(3), pp.298-301, March 2001.

K. U. Jeong, J.-J. Kim and T.-H. Yoon,

“Synthesis and characterization of novel polyimides containing fluorine and phosphine oxide moieties”, Polymer, Vol.42(14), pp.6019-6030. February 21 (2001).

T.-H. Yoon, K.-U. Jeong, B.-Y. Myoung, J.-J. Kim,

“Synthesis and characterization of novel fluorine and phosphine oxide containing polyimdies”, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 220, U352-U352, 2000

J. W. Kang, J. S. Kim, C. M. Lee, E. Y. Kim and J.-J. Kim,

“1×2 all-optical switch using photochromic-doped waveguides”, Electron. Lett. Vol. 36(19), pp.1641-1642. (2000).

C.-L. Lee, K. B. Lee and J.-J. Kim,

“Polymer phosphorescent light-emitting devices doped with tris(2-phenylpyridine) iridium as a Triplet Emitter” Appl. Phys. Lett. Vol. 77(15), pp. 2280-2282, 9 Oct. 2000.

J.-H. Yoon, T.-W. Lee, O.-O. Park and J.-J. Kim,

“Evidence of band bending observed by electroabsorption studies in polymer light emitting devices with ionomer/Al or LiF/Al cathode”, Appl. Phys. Lett., Vol.76(16), pp.2152-2154, (16) (2000)

Y.-D. Shin, Y.-S. Choi, J.-J. Kim, J.-S. Lee, S.-H. Han and J. W. Wu

“Anionic Living Polymerization of Monomers with Photo-Electronic Properties for Control of Polymeric Nano Architectures”, Mol. Cryst. Liq. Cryst, Vol. 349, pp9-14, June (2000).

S.-W. Kim, H. K. Jung, J. K. Lee, M. S. Kang, S. Y. Park, and J.-J. Kim,

“Polymer Electroluminescent Devices of Poly(4,4′-triphenyl amine-diylvinylene-alt 4,4′-diphenyl-sulfone-vinylene) (PTASV)”, Mol. Cryst. Liq. Cryst, Vol. 349, pp4383-388, June (2000).

J.-H. Yoon, J.-J. Kim, T.-W. Lee, and O. O. Park

“Electroabsorption Measurement of Polymer Electroluminescent Devices with Insulating Layer”, Mol. Cryst. Liq. Cryst, Vol. 349, pp447-450 , June (2000).

C. H. Kim, H. S. Kim, M. R. Kim, B. G. Shin, J.-J. Kim, C.-H. Lee, C. S. Ha, and J. K. Lee,

“Photovoltaic properties of PVK based films with 5, 10, 15, 20-Tetra(O-Nitrophenyl) Porphyrinatozinc and 8-Hydroquinoline Aluminium”, Mol. Cryst. Liq. Cryst, Vol. 349, pp427-430 June (2000).

1995 ~ 1999

H. K. Jung, J. K. Lee, M. S. Kang, S. W. Kim, J.-J. Kim and S. Y. Park,

“Synthesis and properties of poly(p-phenylenevinylene-co-sulfonylene) for a blue light-emitting diode”, Polym. Bull 43, pp. 13-20 (1999).

J.-J. Kim, W.-Y. Hwang, H. Park, H.-M. Lee and S.G. Han,

“Importance of the electrical property of the cladding layer in electro-optic polymer waveguides”, Nonlinear Optics, Vol. 22, pp. 469-472 (1999).

J.-J. Kim, W.-Y. Hwang and M.-C. Oh,

“Advances in electro-optic polymer waveguide devices”, Nonlinear Optics, Vol. 20, pp. 237-254 (1999).

Y. -M. Kim, J. -I. Jin, M. Y. Jin, K. Y. Choi, J.-J. Kim and T. Y. Zyung,

“Synthesis and characterization of novel polyamides carrying NLO moieties”, Polymer, Vol. 38. No.9. pp2269-2275, (1997).

H.-M. Lee, W.-Y. Hwang, M.-C. Oh, H. Park, T. Zyung and J.-J. Kim,

“High performance electro-optic polymer waveguide device”, Appl. Phys. Lett. 71, 3779 (1997).

L.-M. Do, K. Kim, T. Zyung, H.-K. Shim, J.-J. Kim,

“In situ Investigation of degradation in polymeric electroluminescent devices using time-resolved confocal laser scanning microscope”, Appl. Phys. Lett. 70, 3470 (1997).

H.-M. Lee, W.-Y. Hwang, M.-C. Oh, H. Park, and J.-J. Kim,

“End-face scattering loss in integrated-optical waveguide”, Appl. Optics, 36 (34), 9021 (1997).

W.-Y. Hwang, M.-C. Oh, H.-M. Lee, H. Park, and J.-J. Kim,

“Polymeric 2 x 2 electrooptic switch consisting of asymmetric Y junctions and Mach-Zehnder interferometer”, IEEE Photon. Tech. Lett. 9, 761 (1997).

Y.-E. Kim, H. Park and J.-J. Kim,

“Improvement of quantum efficiency in polymer electroluminescence devices by inserting PMMA Langmuir-Blodgett films”, Synth. Met. 85, 1191 (1997).

Y.-E. Kim, S.-D. Jung, H. Park, W.-Y. Hwang, T. Zyung, H.-S. Shin, I.-N. Kang, H-K Shim and J.-J. Kim,

“PMMA Langmuir-Blodgett films inserted in a polymer light emitting diode to improve quantum efficiency”, Mol. Cryst. Liq. Cryst. 294, 123 (1997).

H. Park, W.-Y. Hwang and J.-J. Kim,

“Origin of direct current drift in electro-optic polymer modulator”, Appl. Phys. Lett. V.70 (21), 2796 (1997).

M.-C. Oh, W.-Y. Hwang, J.-J. Kim, S.-Y. Shin,

“Electro-optic polymer devices for the control of guided-wave polarization”, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 212, 244-PMSE (1996)

I.-N. Kang, D.-H. Hwang, H.-K. Shim, T. Zyung and J.-J. Kim,

“Highly improved quantum efficiency in blend polymer LEDs”, Macromolecules 29, 165 (1996).

J.-J. Kim and W.-Y. Hwang,

“Design and Fabrication of Electro-Optic Polymer Waveguide Devices”, to be printed in “Poled Polymers and Their Applications to SHG and EO Devices”, (1996) Ed. by Miyata and Sasabe.

Y.-E. Kim, H. Park and J.-J. Kim,

“Enhanced Quantum Efficiency in Polymer Electroluminescence Devices by Inserting a Tunneling Barrier formed by Langmuir-Blodgett Films”, Appl. Phys. Lett. 69 (5), 599 (1996).

W.-Y. Hwang and J.-J. Kim,

“Polymeric optical intensity modulator optimized in quasi-single mode operation”, Appl. Phys. Lett. 69 (11), 1520 (1996).

M.-C. Oh, S.-Y. Shin, W.-Y. Hwang and J.-J. Kim,

“Polymeric Waveguide Polarisation Splitter Based on Poling-Induced Birefringence”, Electron. Lett. 32, 324 (1996).

M.-C. Oh, S.-Y. Shin, W.-Y. Hwang and J.-J. Kim,

“Poling Induced Waveguide Polarizers in Electro-Optic Polymers”, IEEE Photonics Technol. Lett. 8 (3), 375 (1996).

J.-J. Kim, T. Zyung, H.-W. Hwang and M.-C. Oh,

“Photobleaching for the formation of nonlinear optical polymer waveguide devices”, Korea J. Chem. Eng. 13(2), 187 (1996).

T. Zyung, J.-J. Kim, I.-N. Kang, D.-H. Hwang and Hong-Ku Shim,

“Electroluminescent behaviour in multilayer structure device using poly (p-phenylenevinylene) derivative”, Mol. Cryst. Liq. Cryst. 280, 357 (1996).

J.-J. Kim and W.Y. Hwang,

“Design Considerations of electro-optic polymer waveguide devices”, Nonlinear Optics, 15, 307 (1996).

D.-J. Kim, S. H. Kim, T. Zyung, J.-J. Kim, I. Cho and S. K. Choi,

“Synthesis of a new class of processable electroluminescent poly (cyanoterephthalylidene) derivative with a tertiary amine linkage”, Macromolecules 29 (7) 3657 (1996).

W.-Y. Hwang, J.-J. Kim, T. Zyung, M.-C. Oh and S.Y. Shin,

“TE-TM mode converter in a poled polymer waveguide”, IEEE J. Quantum Electron. 32, 1054 (1996).

T. Zyung and J.-J. Kim,

“Photodegradation of poly(p- phenylenevinylene) by laser light at the peak wavelength of electroluminescence”, Appl. Phys. Lett. 67, 3420 (1995).

M.-C. Oh, S.-Y. Shin, W.-Y. Hwang and J.-J. Kim,

“Wavelength insensitive passive polarizatin converter fabricated by poled polymer waveguides”, Appl. Phys. Lett. 67 (13), 1821 (1995).

W.-Y. Hwang, J.-J. Kim, T. Zyung, M.-C. Oh and S.-Y. Shin,

“Postphotobleaching method for the control of coupling constant in an electro-optic polymer directional coupler switch”, Appl. Phys. Lett. 67, 763-765 (1995).

T. Zyung, D.-H. Hwang, I.-N. Kang, H.-K. Shim, W.-Y. Hwang and J.-J. Kim,

“Novel Blue Electroluminescent Polymers with Well-Defined Conjugation Length”, Chem. of Materials 7(8), 1499-1503 (1995).

T. Zyung, J.-J. Kim and W.-Y. Hwang,

“Photostability of nonlinear optical copolymer under irradiation with infrared light”, Mol. Cryst. Liq. Cryst. 267, 47-52 (1995).

J.-J. Kim, W.-Y. Hwang and T. Zyung,

“Design and fabrication of nonlinear optical polymer waveguide devices”, Mol. Cryst. Liq. Cryst. 267, 353-363 (1995).

T. Zyung, J.-J. Kim, W.-Y. Hwang, D.-H. Hwang and H.-K. Shim,

“Electroluminescence from Poly(p-phenylenevinylene with monoalkoxy substituent on the aromatic ring”, Synthetic Metals 71, 2167-2169 (1995).

S.-D. Jung, J.-J. Kim and I.-C. Jeon,

“Helical chain configuration of isotactic PMMA LB films observed by atomic force microscopy”, Synthetic Metals 71, 2025-2026 (1995).

1990 ~ 1994

D.-H. Hwang, J.-I. Lee, H.-K. Shim, W.-Y. Hwang, J.-J. Kim, and J.-I. Jin,

“Synthesis of poly[(2-)2-(4-cyanophenyl)ethenyl)-5-methoxy-1,4-phenylene)vinylene] and poly(1,4-phenylenevinylene) copolymers: electrical and the second- and third-order nonlinear optical properties”, Macromolecules 27, 6000 (1994).

T. Zyung and J.-J. Kim and W-Y Hwang,

“Delineation of refractive index profiles formed by photobleaching in stilbene derivative nonlinear optical polymer”, Polymer Preprint 135, 285-286 (1994).

W.-Y. Hwang, S.-D. Jung, J.-J. Kim and T. Zyung,

“Geodesic PMMA Wave-guide Lens Fabricated by Langmuir-Blodgett Technique”, Polymer Preprint 135, 268-270 (1994).

T. Zyung, W.-Y. Hwang and J.-J. Kim,

“Accelerated photobleaching of nonlinear optical polymer for the formation of optical waveguide”, Appl. Phys. Lett. 64(26), 3527-3529 (1994).

J.-J. Kim, T. Zyung and W-Y Hwang,

“Photochemically formed refractive index profiles in nonlinear optical polymeric thin films”, Appl. Phys. Lett. 64(25), 3488-3490 (1994).

W.-Y. Hwang, J.-J. Kim, S-D Jung, and T. Zyung,

“A 1× N therno-optic space switch in a polymeric planar waveguide”, Optics Commun. 109, 249-252 (1994).

T. Zyung, J.-J. Kim, S.-D. Jung, and W-Y. Hwang,

“Effects of photobleaching wavelength on the resulting refractive index profiles in nonlinear optical polymeric thin films”, Mol. Cryst. Liq. Cryst. 247, 49-58 (1994).

S.D. Jung, J.-J. Kim, W-Y. Hwang and T. Zyung,

“Transfer characteristics of Langmuir-Blodgett films of stereoregular poly(methyl methacrylate)”, Mol. Cryst. Liq. Cryst. 247, 281-291 (1994).

J. S. Ha, H.-S. Roh, S. D. Jung, S.-J. Park, J.-J. Kim and E.H. Lee,

“Structural study of a Poly(methyl methacrylate) Langmuir-Blodgett film on a graphite surface by scanning tunneling microscopy”, Journal of Vacuum Science & Technology B 12(3), 1977-1980 (1994).

J.-J. Kim, S.-D. Jung, H.-S. Roh, and J.-S. Ha,

“Molecular-configuration of isotactic PMMA Langmuir-Blodgett films observed by scanning tunnelling microscopy”, Thin Solid Films 244, 700-704 (1994).

T. Zyung, W-Y. Hwang, J.-J. Kim and S.D. Jung,

“Effective reduction of photobleaching time of non-linear optical polymer for fabrication of waveguide in thin film”, Optical Society of America 1993 Technical Digest Series Vol. 17 pp. 103-106 (1993).

J.-J. Kim, Shin-Woong Kang, Do-Hoon Hwang and Hong-Ku Shim,

“Electro-optic properties of (2-cyano-5-methoxy-1,4-phenylenevinylene) and paraphenylenevinylene copolymers”, Synthetic Metals 55-57, 4024-4028 (1993).

J.-J. Kim and E.-H. Lee,

“Utility potential of nonlinear optical polymers for optical telecommunication and switching applications”, Mol. Cryst. Liq. Cryst. 227, 71-84 (1993).

1985 ~ 1989

Jang-Joo Kim, D. A. Stevenson,

“Hydrogen permeation studies of amorphous and crystallized nickel-titanium alloys”, Journal of Non-Crystalline Solids, 101(2-3), 187-97, (1988)

J.-J. Kim, P. Moine, and D. A. Stevenson,

“Crystallization behavior of amorphous Ni-Ti alloys prepared by sputter deposition” Scripta Metallugica, Vol. 20. pp. 243-248 (1986).

P. Moine, A. Naudon, J.-J. Kim, A.F. Marshall and D.A. Stevenson,

“Characterization of Ni-Ti synthesized by vapor quenching” Jounal de Physique, pp. C8-223, 1985.