title: Hyperbranched polymer as an acceptor for polymer solar cells.
abstract: For the first time, a hyperbranched polymer acceptor, HP-PDI, was designed, synthesized and applied in polymer solar cells (PSCs). Devices based on HP-PDI showed a power conversion efficiency of 2.15%, which is 14 times higher than that of devices based on the small molecular acceptor SM-PDI. The hyperbranched structure can effectively suppress the aggregation of PDI molecules preventing them from forming large domains. Our preliminary results have demonstrated that high efficiency PSCs could be achieved by using a hyperbranched polymer acceptor.
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China. xuxj@bnu.edu.cn zsbo@bnu.edu.cn.
authors.forename: Jicheng
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China. xuxj@bnu.edu.cn zsbo@bnu.edu.cn.
authors.forename: Sufei
authors.initials: S
authors.lastname: Xie
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China. xuxj@bnu.edu.cn zsbo@bnu.edu.cn.
authors.forename: Xuejuan
authors.initials: X
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Environmental Engineering, ShanXi DaTong University, Datong 037009, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Lu
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China. xuxj@bnu.edu.cn zsbo@bnu.edu.cn.
authors.forename: Hongmei
authors.initials: H
authors.lastname: Xiao
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China. xuxj@bnu.edu.cn zsbo@bnu.edu.cn.
authors.forename: Cuihong
authors.identifier: 0000-0002-4071-6359
authors.initials: C
authors.lastname: Li
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China. xuxj@bnu.edu.cn zsbo@bnu.edu.cn.
authors.forename: Guangwu
authors.initials: G
authors.lastname: Li
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China. xuxj@bnu.edu.cn zsbo@bnu.edu.cn.
authors.forename: Xinjun
authors.initials: X
authors.lastname: Xu
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China. xuxj@bnu.edu.cn zsbo@bnu.edu.cn.
authors.forename: Xuebo
authors.initials: X
authors.lastname: Chen
authors.affiliation: Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China. xuxj@bnu.edu.cn zsbo@bnu.edu.cn.
authors.forename: Zhishan
authors.initials: Z
authors.lastname: Bo