A homopolymer based on double B←N bridged bipyridine as electron acceptor for all-polymer solar cells  

作　　者：Xiaojing Long Chuandong Dou Jun Liu Lixiang Wang 

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences

出　　处：《Chinese Chemical Letters》2018年第9期1343-1346,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.21625403,21574129);Strategic Priority Research Program of Chinese Academy of Sciences (No.XDB12010200);Jilin Scientific and Technological Development Program (No.20170519003JH);Youth Innovation Promotion Association of Chinese Academy of Sciences (No.2017265);Open Project (No.sklssm201803) of the State Key Laboratory of Supramolecular Structure and Materials in Jilin University of China

摘　　要：Polymer electron acceptors for all-polymer solar cells （all-PSCs） are usually conjugated copolymers, which contain alternating electron-rich units and electron-deficient units. In this manuscript, we report a conjugated homopolymer （P-BNBP） based on an electron-deficient unit of double B,--N bridged bipyridine, which can be used as electron acceptor for all-polymer solar cells. P-BNBP shows low-lying LUMO energy level of -3.59eV, high absorption coefficient of 1.6 ×10^5Lmo1^-1 cm^-1 at 626nm and moderate electron mobility of 4.37 ×10^-6cm^2V^-1s^-1. AII-PSC devices exhibit power conversion efficiencies of 2.44%-3.04%. These results demonstrate that conjugated homopolymers are promising as electron acceptor materials for alI-PSCs.Polymer electron acceptors for all-polymer solar cells （all-PSCs） are usually conjugated copolymers, which contain alternating electron-rich units and electron-deficient units. In this manuscript, we report a conjugated homopolymer （P-BNBP） based on an electron-deficient unit of double B,--N bridged bipyridine, which can be used as electron acceptor for all-polymer solar cells. P-BNBP shows low-lying LUMO energy level of -3.59eV, high absorption coefficient of 1.6 ×10^5Lmo1^-1 cm^-1 at 626nm and moderate electron mobility of 4.37 ×10^-6cm^2V^-1s^-1. AII-PSC devices exhibit power conversion efficiencies of 2.44%-3.04%. These results demonstrate that conjugated homopolymers are promising as electron acceptor materials for alI-PSCs.

关 键 词：All-polymer solar cells HOMOPOLYMER Electron acceptor B←N coordination bond Yamamoto polymerization 

分 类 号：O633.5[理学—高分子化学] TM914.4[理学—化学]