Fluorine substitution enhanced photovoltaic performance of a D–A1–D–A2 copolymer

• DOI: 10.1039/c3cc44931a
• Publication Date: 2013-08-12T09:01:07Z
• Authors: Dongfeng Dang; Weichao Chen; Renqiang Yang; Weiguo Zhu; Wendimagegn Mammo; Ergang Wang
• Keywords: Quinoxaline; Fluorine; Substitution (logic); Acceptor; Electron acceptor

A new alternating donor–acceptor (D–A1–D–A2) copolymer containing two electron-deficient moieties, isoindigo and quinoxaline, was synthesized. The photovoltaic performance of this polymer could be improved by incorporating fluorine atoms into the quinoxaline units, resulting in an efficiency 6.32%. This result highlights attractive promise D–A1–D–A2 copolymers for high-performance bulk heterojunction solar cells.