title: An electron acceptor challenging fullerenes for efficient polymer solar cells.
abstract: A novel non-fullerene electron acceptor (ITIC) that overcomes some of the shortcomings of fullerene acceptors, for example, weak absorption in the visible spectral region and limited energy-level variability, is designed and synthesized. Fullerene-free polymer solar cells (PSCs) based on the ITIC acceptor are demonstrated to exhibit power conversion efficiencies of up to 6.8%, a record for fullerene-free PSCs.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China; University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
authors.forename: Yuze
authors.initials: Y
authors.lastname: Lin
authors.forename: Jiayu
authors.initials: J
authors.lastname: Wang
authors.forename: Zhi-Guo
authors.initials: ZG
authors.lastname: Zhang
authors.forename: Huitao
authors.initials: H
authors.lastname: Bai
authors.forename: Yongfang
authors.initials: Y
authors.lastname: Li
authors.forename: Daoben
authors.initials: D
authors.lastname: Zhu
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Zhan
keywords: fullerene-free polymer solar cells; fused ring-based acceptors; non-fullerene acceptors; polymer solar cells