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ITO-free inverted polymer solar cells using a GZO cathode modified by ZnO |
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| Authors: | Soo-Ghang IhnKyung-Sik Shin Mi-Jin JinXavier Bulliard Sungyoung YunYeong Suk Choi Yungi KimJong-Hwan Park Myungsun SimMin Kim Kilwon ChoTae Sang Kim Dukhyun Choi Jae-Young ChoiWoong Choi Sang-Woo Kim |
| Affiliation: | a Samsung Advanced Institute of Technology, Samsung Electronics, Yongin 446-712, Republic of Korea b School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea c Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea d SKKU Advanced Institute of Nanotechnology (SAINT) and Center for Human Interface Nanotechnology (HINT), Sungkyunkwan University, Suwon 440-746, Republic of Korea |
| Abstract: | A gallium-doped ZnO (GZO) layer was investigated and compared with a conventional indium-tin-oxide (ITO) layer for use as a cathode in an inverted polymer solar cell based on poly(3-hexylthiophene) (P3HT):[6,6]-phenyl-C61 butyric acid methyl ester (PCBM) bulk heterojunctions (BHJ). By modifying the GZO cathode with a ZnO thin layer, a high power conversion efficiency (3.4%) comparable to that of an inverted solar cell employing the same P3HT:PCBM BHJ photoactive layer with a conventional ITO/ZnO cathode was achieved. This result indicates that GZO is a transparent electrode material that can potentially be used to replace high-cost ITO. |
| Keywords: | Inverted polymer solar cell Ga-doped ZnO Transparent conducting oxide ITO-free Power conversion efficiency |
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