title: Alkyl chain engineering on a dithieno[3,2-b:2',3'-d]silole-alt-dithienylthiazolo[5,4-d]thiazole copolymer toward high performance bulk heterojunction solar cells.
abstract: A new copolymer of dithienosilole and dithienylthiazolo[5,4-d]thiazole with a hexyl side chain on the 4-position of thiophene units was designed and synthesized. Polymer solar cells based on the polymer as a donor and PC(70)BM as an acceptor demonstrated a power conversion efficiency up to 5.88% with a high fill factor of 71.6%.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Zhi-Guo
authors.initials: ZG
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Min
authors.forename: Siyuan
authors.initials: S
authors.lastname: Zhang
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Maojie
authors.initials: M
authors.lastname: Zhang
authors.forename: Yongfang
authors.initials: Y
authors.lastname: Li