title: Polymer Acceptor Based on B←N Units with Enhanced Electron Mobility for Efficient All-Polymer Solar Cells.
abstract: We demonstrate that polymer electron acceptors with excellent all-polymer solar-cell (all-PSC) device performance can be developed from polymer electron donors by using B←N units. By alleviating the steric hindrance effect of the bulky pendant moieties on the conjugated polymers that contain B←N units, the π-π stacking distance of polymer backbones is decreased and the electron mobility is consequently enhanced by nearly two orders of magnitude. As a result, the power conversion efficiency of all-PSCs with the polymer acting as the electron acceptor is greatly improved from 0.12 % to 5.04 %. This PCE value is comparable to that of the best all-PSCs with state-of-the-art polymer acceptors.
authors.affiliation: State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P.R. China.|University of the Chinese Academy of Sciences, Beijing, 100864, P.R. China.
authors.forename: Ruyan
authors.initials: R
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P.R. China. chuandong.dou@ciac.ac.cn.
authors.forename: Chuandong
authors.initials: C
authors.lastname: Dou
authors.affiliation: State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P.R. China. xiezy_n@ciac.ac.cn.
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Xie
authors.affiliation: State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P.R. China. liujun@ciac.ac.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P.R. China.
authors.forename: Lixiang
authors.initials: L
authors.lastname: Wang
keywords: boron; conjugation; electron acceptor; polymers; solar cells