Enhancing Photovoltaic Performance of Nonfused-Ring Electron Acceptors via Asymmetric End-group Engineering and Noncova-lently Conformational Locks Bo Liu, Congqi Li, Xiaobin Gu, Yinghui Han,* Zhixiang Wei, Yunhao Cai, Xin Zhang* and Yanping Huo*, Chin. J. Chem. 2023, 41, XXX—XXX. DOI: 10.1002/cjoc.202300XXX
The asymmetric end-group engineering was employed to construct a new nonfused-ring electron acceptors (NFREAs), namely NoCA-19 containing two distinct end-groups. Compared with symmetric acceptors, asymmetric acceptor NoCA-19 possesses broad light absorption range, more coplanar π-conjugated backbone, and appropriate crystallinity. Thus, NoCA-19-based organic solar cell shows a considerable power conversion efficiency of 12.26%, demonstrating the potential of asymmetric end-group engineering in achieving low-cost and high-performance NFREAs.