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The effect of external electric field on the performance of perovskite solar cells
Affiliation:1. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;2. Department of Physics, Biology and Chemistry (IFM), Linköping University, Linköping SE-581 83, Sweden;3. University of Chinese Academy of Sciences, Beijing 100049, China;1. Department of Chemistry, Shantou University, Guangdong 515063, China;2. Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong Special Administrative Region;3. Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China;4. 4/F R&D Building, Skyworth Science Park, Tangtou Industrial Zone, Shiyan Town, Baoan District, Shenzhen, China;1. Department of Physics and Astronomy, London Centre for Nanotechnology, University College London, Gower Street, London WC1E 6BT, UK;2. Istituto per la Sintesi Organica e la Fotoreattività, Centro Nazionale delle Ricerche (CNR), via P. Gobetti 101, Bologna 40129, Italy;3. BASF SE, Carbon Materials Innovation Center, Ludwigshafen 67056, Germany;1. School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410004, People’s Republic of China;2. Physics Science and Engineering Technology College, Yichun University, Yichun 336000, People’s Republic of China;3. Department of Applied Physics, Hunan University and Key Lab for Micro-Nano Physics and Technology of Hunan Province, Changsha 410082, People’s Republic of China;1. Department of Clinical Pharmacy, School of Pharmacy, College of Pharmacy, Taipei Medical University, Taipei, Taiwan;2. Department of Green Material Technology, Green Technology Research Institute, Chinese Petroleum Corporation (CPC Corporation), Kaohsiung, Taiwan;3. Department of Mechanical and Automation Engineering, I-Shou University, Kaohsiung, Taiwan;4. Department of Fragrance and Cosmetic Science, Kaohsiung Medical University, Kaohsiung, Taiwan;1. School of Chemical Engineering and Material Science, Chung-Ang University, Seoul 156-756, South Korea;2. Energy Nano Materials Research Center, Korea Electronics Technology Institute (KETI), Seongnam 463-816, South Korea
Abstract:Planar heterojunction perovskite solar cells were fabricated through a low temperature approach. We find that the device performance significantly depends on the external bias before and during measurements. By appropriate optimization of the bias conditions, we could achieve an 8-fold increase in the power conversion efficiency. The significant improvement in device performance might be caused by the ion motion in the perovskite under the external electric field.
Keywords:Perovskite solar cells  External bias  Ion motion  Electric double layers
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