A highly efficient PTB7-Th polymer donor bulk hetero-junction solar cell with increased open circuit voltage using fullerene acceptor CN-PC70BM |
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| Affiliation: | 1. Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Uppal Road, Tarnaka, Hyderabad, 500007, India;2. Academy of Scientific and Innovative Research (AcSIR), New Delhi, 110 025, India;3. CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi, 110012, India;1. Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China;2. Synergetic Innovation Center for Quantum Effects and Applications of Hunan, Changsha 410081, China;1. Plastic Electronics and Energy Laboratory (PEEL), Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India;2. Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305701, Republic of Korea;3. CSIR-National Physical Laboratory, New Delhi, 110012, India;1. Department of Materials Science and Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, South Korea;2. School of Electrical and Computer Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea;3. Department of Creative Convergence Engineering, Hanbat National University, Yuseong-ku, Daejeon, 305-719, South Korea;4. School of Electronics Engineering, And School of Electronic and Electrical Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, South Korea;1. CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. State Key Laboratory of Organic-Inorganic Composite, Beijing University of Chemical Technology, Beijing 100029, China;1. Key Laboratory of Luminescence and Optical Information (Beijing Jiaotong University), Ministry of Education, Beijing, 100044, China;2. Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China |
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| Abstract: | Modified 6,6]-phenyl-C70-butyric acid methyl ester (CN-PC70BM) is employed as an electron acceptor along with poly4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo1,2-b; 4,5-b']dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno3,4-b]thiophene-)-2-carboxylate-2-6-diyl)] (PTB7-Th) polymer as donor for solution-processed organic solar cells. Inverted device architecture is adopted to fabricate the photovoltaic devices. Using chloronaphthalene as an additive, a high power conversion efficiency (PCE) of 8.2% is achieved with an excellent open circuit voltage (Voc) of 0.9 V, short-circuit current density (Jsc) of 13.5 mA cm?2 and fill factor of 0.68 as compared to PCE of 5.4% from the reference solar cell using PC70BM. |
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| Keywords: | Modified fullerene acceptor PTB7-Th polymer donor Organic solar cells Additive High open circuit voltage High power conversion efficiency |
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