title: High-Efficiency Nonfullerene Polymer Solar Cells with Medium Bandgap Polymer Donor and Narrow Bandgap Organic Semiconductor Acceptor.
abstract: A nonfullerene polymer solar cell with a high efficiency of 9.26% is realized by using benzodithiophene-alt-fluorobenzotriazole copolymer J51 as a medium-bandgap polymer donor and the low-bandgap organic semiconductor ITIC with high extinction coefficients as the acceptor.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Gao
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China. zgzhangwhu@iccas.ac.cn.
authors.forename: Zhi-Guo
authors.initials: ZG
authors.lastname: Zhang
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Haijun
authors.initials: H
authors.lastname: Bin
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: Lingwei
authors.initials: L
authors.lastname: Xue
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Yankang
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, CA, 94720, USA.
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.affiliation: Materials Sciences Division, Lawrence Berkeley National Lab, Berkeley, CA, 94720, USA. iamfengliu@gmail.com.
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
authors.affiliation: Polymer Science and Engineering Department, University of Massachusetts, Amherst, MA, 01003, USA.
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Russell
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China. liyf@iccas.ac.cn.|University of Chinese Academy of Sciences, Beijing, 100049, China. liyf@iccas.ac.cn.|Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China. liyf@iccas.ac.cn.
authors.forename: Yongfang
authors.initials: Y
authors.lastname: Li
keywords: ITIC; extinction coefficients; fluorinated conjugated polymer donors; nonfullerene polymer solar cells