| An A-D-A′-D-A type unfused nonfullerene acceptor for organic solar cells with approaching 14%efficiency |
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| 作者姓名： | Xingzheng Liu Yanan Wei Xin Zhang Linqing Qin Zhixiang Wei Hui Huang |
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| 作者单位： | College of Materials Science and Opto-Electronic Technology;CAS Key Laboratory of Nanosystem and Hierarchical Fabrication |
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| 基金项目： | the National Natural Science Foundation of China(21774130,51925306);the National Key R&D Program of China(2018FYA 0305800);the Key Research Program of Frontier Sciences,CAS(QYZDB-SSW-JSC046);Key Research Program of the Chinese Academy of Sciences(XDPB08-2);the Strategic Priority Research Program of Chinese Academy of Sciences(XDB28000000);the International Partnership Program of Chinese Academy of Sciences(211211KYSB20170014);China Postdoctoral Science Foundation(2020M670425)。 |
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| 摘 要： | In recent years,power conversion efficiency(PCE)of organic solar cells(OSCs)has made significant improvement.A large number of studies were reported to achieve high PCEs through exploring new active layer materials,especially the high efficiency fused ring acceptors(FRAs).Compared with FRAs,another type of so-called unfused-ring acceptors(UFAs),possessing some advantages such as simple synthesis and low cost,have attracted a lot of attention.Herein,a new UFA BTzO-4F,incorporating with a benzotriazole moiety and S···O intramolecular noncovalent interactions,has been successfully synthesized.The photovoltaic device based on PBDB-T:BTzO-4F achieved a record PCE of 13.8%for UFAs,which indicates that introducing the benzotriazole moiety is an effective strategy for high quality acceptors.Thus,these findings of this work demonstrate the great potential of UFAs for high performance OSCs.
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| 关 键 词： | organic solar cells unfused nonfullerene acceptor benzotriazole moiety |
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