An A-D-A'-D-A type unfused nonfullerene acceptor for organic solar cells with approaching 14％efficiency

• 作者: Xingzheng Liu Yanan Wei Xin Zhang Linqing Qin Zhixiang Wei Hui Huang
• 来源期刊: 中国科学：化学（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: COMMUNICATIONS
• 页码范围: 228-231
• 页数: 4页
• 语种: 英文

摘要

In recent years,power conversion efficiency(PCE)of organic solar cells(OSCs)has made significant improvement.A large number of studies were reported to achieve high PCEs through exploring new active layer materials,especially the high efficiency fused ring acceptors(FRAs).Compared with FRAs,another type of so-called unfused-ring acceptors(UFAs),possessing some advantages such as simple synthesis and low cost,have attracted a lot of attention.Herein,a new UFA BTzO-4F,incorporating with a benzotriazole moiety and S…O intramolecular noncovalent interactions,has been successfully syn-thesized.The photovoltaic device based on PBDB-T:BTzO-4F achieved a record PCE of 13.8％for UFAs,which indicates that introducing the benzotriazole moiety is an effective strategy for high quality acceptors.Thus,these findings of this work demonstrate the great potential of UFAs for high performance OSCs.