Rubrene-based interfacial engineering toward enhanced performance in inverted polymer solar cells |
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| Affiliation: | 1. Key Laboratory of Interface Science and Engineering in Advanced Materials (Ministry of Education), Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan, 030024, China;2. Department of Organic Device Engineering, Graduate School of Science and Engineering, Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata, 992-8510, Japan;3. Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun, 130012, China;1. School of Physical Science and Technology, Southwest University, Chongqing, 400715, PR China;2. College of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China;1. School of Science, China University of Petroleum (East China), Qingdao, 266580, China;2. College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, China;1. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, People''s Republic of China;2. Co-Innovation Center for Micro/Nano Optoelectronic Materials and Devices, Research Institute for New Materials and Technology, Chongqing University of Arts and Sciences, Chongqing 402160, People''s Republic of China;1. College of Electrical and Information Engineering, Shaanxi University of Science and Technology, Xi''an, 710021, PR China;2. Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi''an Jiaotong University, Xi''an, 710049, PR China;3. School of Electrical Engineering, Xi''an Jiaotong University, Xi''an, 710049, PR China |
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| Abstract: | Rubrene, an organic semiconductor having stable fused-ring molecular structure was used as a double interfacial layer in inverted organic solar cells. When a thin, 3 nm-thick layer of rubrene was introduced between a MoO3-based hole-collecting layer and a bulk-heterojunction (BHJ) photo-active layer consisting of poly{4,8-bis(2-ethylhexyl)oxy]benzo1,2-b:4,5-b']dithiophene-2,6-diyl-alt-3-fluoro-2-(2-ethylhexyl)carbonyl]thieno3,4-b]thiophene-4,6-diyl} (PTB7) and 6,6]-phenyl C71-butyric acid methyl ester (PC71BM), the power conversion efficiency was improved over 12% (from 7.2% to 8.1%). It was demonstrated that the insertion of thin rubrene layer showed suppressed exciton quenching and improved exciton dissociation, resulting in more efficient charge carrier collection and weaker charge recombination, thus improving the device performance. |
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| Keywords: | Photovoltaic cells Organic solar cells Inverted solar cells Rubrene |
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