title: Bithienopyrroledione vs. thienopyrroledione based copolymers: dramatic increase of power conversion efficiency in bulk heterojunction solar cells.
abstract: Bithienopyrroledione (bi-TPD) based polymers P1 and P2 are designed and synthesized. Photovoltaic devices based on P1:PC71BM and P2:PC71BM blend films show power conversion efficiencies (PCEs) of 8.22% and 9.08%, respectively, whereas devices based on their thienopyrroledione (TPD)-based analogue P3 and PC71BM blend films display a PCE of 5.10%.
authors.affiliation: Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China. lhx@mail.sioc.ac.cn.
authors.forename: Xiaolan
authors.initials: X
authors.lastname: Qiao
authors.affiliation: CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China. yangrq@qibebt.ac.cn.
authors.forename: Weichao
authors.initials: W
authors.lastname: Chen
authors.affiliation: Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China. lhx@mail.sioc.ac.cn.
authors.forename: Qinghe
authors.initials: Q
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.
authors.forename: Shiqian
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China. lhx@mail.sioc.ac.cn.
authors.forename: Hongzhuo
authors.initials: H
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China.
authors.forename: Zhiqiang
authors.identifier: http://orcid.org/0000-0001-7863-1759
authors.initials: Z
authors.lastname: Liu
authors.affiliation: CAS Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China. yangrq@qibebt.ac.cn.
authors.forename: Renqiang
authors.identifier: http://orcid.org/0000-0001-6794-7416
authors.initials: R
authors.lastname: Yang
authors.affiliation: Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China. lhx@mail.sioc.ac.cn.
authors.forename: Hongxiang
authors.identifier: http://orcid.org/0000-0002-1032-1583
authors.initials: H
authors.lastname: Li