19 "Characteristics of indium-free GZO/Ag/GZO and AZO/Ag/AZO multilayer electrode grown by dual target  DC sputtering at room tempeature for low-cost organic photovoltaics", H.-K. Park, J.-W. Kang, S.-I. Na, D.-Y. Kim, and H.-K. Kim, Sol. Energy Mater. … 18 "Comparative Investigation of Transparent ITO/Ag/ITO and ITO/Cu/ITO Electrodes Grown by Dual-Target DC Sputtering for Organic Photovoltaics ", Y.-S. Park, H.-K. Park, J.-A Jeong, H.-K. Kim, K.-H. Choi, S.-I. Na, and D.-Y. Kim, J. Electrochem. Soc., 156, H… 17 "Room-temperature Indium-free Ga:ZnO/Ag/Ga:ZnO multilayer electrode for organic solar cell application", H.-K. Park, J.-A Jeong, Y.-S. Park, S.-I. Na, D.-Y. Kim, and H.-K. Kim, Electrochem. Soild-State. Lett., 12 (8), H309-H311, 2009 16 " Characteristics of flexible indium tin oxide electrode grown by continuous roll-to-roll sputtering process for flexible organic solar cells", Kwang-Hyuk Choi, Jin-A Jeong, Jae-Wook Kang, Do-Guen Kim, Jong Kuk Kim, Seok-In Na, Dong-Yu Kim, Seok-Soon Kim,… 15 "Three-Dimensional Bulk Heterojunction Morphology for Achieving High Internal Quantum Efficiency in Polymer Solar Cells",  Jang Jo, Seok-In Na, Seok-Soon Kim, Tae-Woo Lee, Youngsu Chung, Seok-Ju Kang,Doojin Vak,  and Dong-Yu Kim, Adv. Funct. Mat… 14 "Synthesis of Novel Arylamine containing Perfluorocyclobutane and Its Electrochromic Properties", Bogyu Lim, Yoon-Chae Nah, Jin-Taek Hwang, Jieun Ghim, Doojin Vak, Jin-Mun Yun, and  Dong-Yu Kim, J. Mater. Chem, 19, 2380 - 2385 13 A New Poly(thienylenevinylene) Derivative with High Mobility and Oxidative Stability for Organic Thin-Film Transistors and Solar Cells", Bogyu Lim, Kang-Jun Baeg, Hyung-Gu Jeong, Jang Jo, Hyungsoo Kim, Jeong-Woo Park, Yong-Young Noh, Doojin Vak, Jeong-Ho … 12 Titanium suboxide as an optical spacer in polymer solar cells, Anshuman Roy, Sung Heum Park, Sarah Cowan, Ming Hong Tong, Shinuk Cho, Kwanghee Lee, and Alan J.Heeger, Applied Physics Letters, 95(1), 013302, 2009.7.7 11 "Enhanced performance of Fullerene n-Channel Field-Effect Transistors with Titanium Sub-Oxide Injection Layer", Shinuk Cho, Jung Hwa Seo, Kwanghee Lee, and Alan J. Heeger, Advanced Functional Materials, 19(9), 1459-1464, 2009.5.8 10 " Flexible light-emitting three-terminal device with color-controlled emission" Sung Heum Park, Shinuk Cho, jare Kwan Lee, Kwanghee Lee, and Alan J. Heeger, Organic Electronics, 10, 426-431, 2009 9 "Columnlike" Structure of the Cross-Sectional Morphology of Bulk Heterojunction Materials, Ji Sun Moon, Jae Kwan Lee, Shinuk cho, Jiyun Byun, and Alan J. Heeger, Nano Letters, , 2008 (on-line publich) 8 "Bulk heterojunction solar cells with internal quantum efficiency approaching 100%", Sung Heum Park, Anshuman Roy, Serger Beaupre, Shinuk Cho, Nelson Coates, Ji Sun Moon, Daniel Moses, Mario Leclerc, Kwanghee Lee, and Alan J. Heeger, Nature Photonics, 69,… 7 "Efficient single-component light-emitting electrochemical cells with an ion-conducting water-soluble polyfluorene", Doojin Vak, Seung-Hwan Oh,and Dong-Yu Kim, Appl. Phys. Lett. 94, 243305, 2009 6 "One Transistor-1 Resistor Devices for Polymer Non-volatile Memory Applications", Tae-Wook Kim, Hyejung Choi, Seung-Hwan Oh, Gunuk Wang, Dong-Yu Kim, Hyunsang Hwang, and Takhee Lee, Adv. Mater.,21, 2497, 2009 5 "Efficient organic solar cells with polyfluorene derivatives as a cathode interfacial layer" , Seok-In Na, Seung-Hwan Oh, Seok-Soon Kim, and Dong-Yu, Organic Electronics, 10, 496, 2009 4 "Resistive Switching Characteristics of Polymer Non-volatile Memory Devices in a Scalable Via-hole Structure”, Tae-Wook Kim, Hyejung Choi, Seong-Whan Oh, Minseok Jo, Gunuk Wang, Byungjin Cho, Dong-Yu Kim, Hyunsang Hwang and Takhee Lee, Nanotechnolo… 3 "Time-Dependent Morphology Evolution by Annealing Processes on Polymer:Fullerene Blend Solar Cells" , Jang Jo, Seok-Soon Kim, Seok-In Na, Byung-Kwan Yu, and Dong-Yu Kim, Adv. Funct. Mater.,19, 866, 2009 2 "Improved performance of polymer light-emitting diodes with nanocomposites", A. Mohammed Hussain, B. Neppolian, Sun Hee Kim, Jin Young Kim, Hee-Chul Choi, Kwanghee Lee, Seong-Ju Park, and Alan J. Heeger, Applied Physics Letters, 94, 073306, 2009 1 "Extended Lifetime of Organic field-Effect Transistors Encapsulated with Titanium Sub-Oxide as an 'Active' Passivation/Barrier Layer" , Shinuk Cho, Kwanghee Lee, and Alan J. Heeger, Advanced Materials, 21,1-4,2009