Synthesis and photovoltaic properties of two‐dimensional copolymers based on novel benzothiadiazole and quinoxaline acceptors with conjugated dithienylbenzothiadiazole pendants |
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| Authors: | Yuanshuai Huang Linglong Ye Fen Wu Suli Mei Huajie Chen Songting Tan |
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| Institution: | 1. Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, People's Republic of China;2. Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Xiangtan University, Xiangtan, People's Republic of China |
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| Abstract: | Two novel acceptors of benzoc]1,2,5]thiadiazole and quinoxaline with conjugated dithienylbenzothiadiazole pendants were first designed and synthesized for building efficient photovoltaic copolymers. Based on benzo1,2‐b;3,4‐b′]dithiophene donors and the two acceptors, two new copolymers have been prepared by Stille coupling polymerization. The resulting copolymers were characterized by 1H NMR, gel permeation chromatography, and thermogravimetric analysis. UV–Visible absorption and cyclic voltammetry measurements indicated that the two copolymers possessed strong and broad absorption in the range of 300–700 nm, and deep‐lying energy levels of highest occupied molecular orbitals. The polymer photovoltaic devices based on benzoc]1,2,5]thiadiazole‐based copolymer/phenyl‐C71‐butyric acid methyl ester exhibited a power conversion efficiency of 2.42%, attributed to its relatively better light‐harvesting ability and active film morphology. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016 , 54, 668–677 |
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| Keywords: | benzodithiophene benzothiadiazole conjugated polymers functionalization of polymers polymer solar cells synthesis |
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