title: Alkyl Side-Chain Engineering in Wide-Bandgap Copolymers Leading to Power Conversion Efficiencies over 10.
abstract: A series of wide-bandgap (WBG) copolymers with different alkyl side chains are synthesized. Among them, copolymer PBT1-EH with moderatly bulky side chains on the acceptor unit shows the best photovoltaic performance with power conversion efficiency over 10%. The results suggest that the alkyl side-chain engineering is an effective strategy to further tuning the optoelectronic properties of WBG copolymers.
authors.affiliation: Heeger Beijing Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Tao
authors.initials: T
authors.lastname: Liu
authors.affiliation: Heeger Beijing Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Xuexue
authors.initials: X
authors.lastname: Pan
authors.affiliation: State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
authors.forename: Xiangyi
authors.initials: X
authors.lastname: Meng
authors.affiliation: State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Liu
authors.affiliation: The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.
authors.forename: Donghui
authors.initials: D
authors.lastname: Wei
authors.affiliation: State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Ma
authors.affiliation: Heeger Beijing Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Lijun
authors.initials: L
authors.lastname: Huo
authors.affiliation: Heeger Beijing Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Sun
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, South Korea.
authors.forename: Tack Ho
authors.initials: TH
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Institute for Materials Design, Hanyang University, Seoul, 133-791, South Korea.
authors.forename: Minjuan
authors.initials: M
authors.lastname: Huang
authors.affiliation: Department of Chemistry, Institute for Materials Design, Hanyang University, Seoul, 133-791, South Korea.
authors.forename: Hyosung
authors.initials: H
authors.lastname: Choi
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, South Korea.
authors.forename: Jin Young
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China.
authors.forename: Wallace C H
authors.initials: WC
authors.lastname: Choy
authors.affiliation: Heeger Beijing Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing, 100191, P. R. China.
authors.forename: Yanming
authors.initials: Y
authors.lastname: Sun
keywords: alkyl side chain; efficiency; organic solar cells; wide-bandgap copolymers