title: High-Performance Organic Solar Cells Based on a Non-Fullerene Acceptor with a Spiro Core.
abstract: Derived from perylenediimide (PDI) building blocks, 3D PDI molecules are considered as a type of promising structure to overcome molecular aggregation, thus improving the performance of organic solar cells. Herein, we report a novel PDI-based derivative, SCPDT-PDI4, with four PDI units connected to a unique spiro core. Attributed to this novel molecular design, SCPDT-PDI4exhibits a rigid 3D structure, in which the aggregation tendency of PDI chromophores could be effectively attenuated. Additionally, strong intramolecular charge transfer and high charge mobility are achieved due to the well-conjugated structure and electron-rich property of SCPDT. Therefore, fullerene-free organic solar cells based on SCPDT-PDI4and PTB7-Th achieve a remarkable high efficiency of 7.11 %. Such an excellent result demonstrates the opportunity of SCPDT to be a promising building block for non-fullerene acceptors.
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.
authors.forename: Hua
authors.initials: H
authors.lastname: Sun
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.|Department of Chemistry, South University of Science and Technology of China, Shenzhen, 518055, P. R. China.
authors.forename: Po
authors.initials: P
authors.lastname: Sun
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.
authors.forename: Cong
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 239 Zhangheng Road, Pudong New Area Shanghai, 201204, P. R. China.
authors.forename: Yingguo
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 239 Zhangheng Road, Pudong New Area Shanghai, 201204, P. R. China.
authors.forename: Xingyu
authors.initials: X
authors.lastname: Gao
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.
authors.forename: Fei
authors.initials: F
authors.lastname: Chen
authors.affiliation: Department of Chemistry, South University of Science and Technology of China, Shenzhen, 518055, P. R. China.
authors.forename: Zongxiang
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.
authors.forename: Zhi-Kuan
authors.identifier: http://orcid.org/0000-0002-9514-9566
authors.initials: ZK
authors.lastname: Chen
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
keywords: 3D structure; non-fullerene acceptors; organic solar cells; perylenediimide; power conversion efficiency