title: A PTB7-based narrow band-gap conjugated polyelectrolyte as an efficient cathode interlayer in PTB7-based polymer solar cells.
abstract: A PTB7-based cationic narrow band-gap polyelectrolyte, named PTB7-NBr, has been designed and synthesized as a cathode interfacial material for polymer solar cells. PTB7-NBr exhibits excellent cathode interfacial modification in solar cells with PTB7 and PTB7-Th as donor polymer and a high PCE of 9.24% was achieved.
authors.affiliation: Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China. fangjf@nimte.ac.cn.
authors.forename: Wenjun
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China. fangjf@nimte.ac.cn.
authors.forename: Yaru
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China. fangjf@nimte.ac.cn.
authors.forename: Liping
authors.initials: L
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China. fangjf@nimte.ac.cn.
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Liu
authors.affiliation: Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China. fangjf@nimte.ac.cn.
authors.forename: Changjian
authors.initials: C
authors.lastname: Song
authors.affiliation: Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China. fangjf@nimte.ac.cn.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Li
authors.affiliation: College of Materials and Chemical Engineering, China Three Gorges University, Yichang, 443002, China.
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Sun
authors.affiliation: Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China. fangjf@nimte.ac.cn.
authors.forename: Junfeng
authors.identifier: http://orcid.org/0000-0001-6687-4091
authors.initials: J
authors.lastname: Fang