Simple non-fullerene electron acceptors with unfused core for organic solar cells

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英文篇名：Simple non-fullerene electron acceptors with unfused core for organic solar cells 作者：Yao ; Li ; Yunhua ; Xu ; Fan ; Yang ; Xudong ; Jiang ; Cheng ; Li ; Shengyong ; You ; Weiwei ; Li 英文作者：Yao Li;Yunhua Xu;Fan Yang;Xudong Jiang;Cheng Li;Shengyong You;Weiwei Li;Department of Chemistry, School of Science, Beijing Jiaotong University;Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences;Institute of Applied Chemistry, Jiangxi Academy of Sciences; 英文关键词：Organic solar cells;;Non-fullerene electron acceptors;;Unfused core;;High crystallinity;;Low cost materials 中文刊名：FXKB 英文刊名：中国化学快报(英文版) 机构：Department of Chemistry, School of Science, Beijing Jiaotong University;Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences;Institute of Applied Chemistry, Jiangxi Academy of Sciences; 出版日期：2019-01-15 出版单位：Chinese Chemical Letters 年：2019 期：v.30 基金：supported by MOST (No. 2017YFA0204702);; National Natural Science Foundation of China (Nos. 51773207, 21574138, 51603209, 91633301);; supported by the Strategic Priority Research Program (No. XDB12030200) of the Chinese Academy of Sciences and the Recruitment Program of Global Youth Experts of China 语种：英文; 页：FXKB201901050 页数：3 CN：01 ISSN：11-2710/O6 分类号：242-244

摘要

Two simple electron acceptors based on unfused bithiophene core and 1,1-dicyanomethylene-3-indanone end group were easily prepared via three synthetic steps. These acceptors exhibited broad absorption in the range of 300 nm to 800 nm, aligned energy levels and high crystallinity. When combined with a wide band gap donor polymer in non-fullerene solar cells, an initial power conversion efficiency of 2.4% was achieved. The relatively low efficiencies were due to the large phase separation in blended thin films, which is originated from their high aggregation tendency in thin films. Our results suggest that these electron acceptors with unfused core are promising candidates for commercial application of solar cells due to the low cost starting materials and facile synthesis.
        Two simple electron acceptors based on unfused bithiophene core and 1,1-dicyanomethylene-3-indanone end group were easily prepared via three synthetic steps. These acceptors exhibited broad absorption in the range of 300 nm to 800 nm, aligned energy levels and high crystallinity. When combined with a wide band gap donor polymer in non-fullerene solar cells, an initial power conversion efficiency of 2.4% was achieved. The relatively low efficiencies were due to the large phase separation in blended thin films, which is originated from their high aggregation tendency in thin films. Our results suggest that these electron acceptors with unfused core are promising candidates for commercial application of solar cells due to the low cost starting materials and facile synthesis.

引文

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