Effects of subtle change in side chains on the photovoltaic performance of small molecular donors for solar cells  

作　　者：Xiang Gao Kuibao Yu Yanjiao Zhao Tao Zhang Jing Wen Zifeng Liu Zhihao Liu Guofeng Ye Jianhong Gao Ziyi Ge Zhitian Liu 

机构地区：[1]Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials,Hubei Key Laboratory of Plasma Chemistry and Advanced Materials,School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China [2]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [3]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Chemical Letters》2022年第10期4659-4663,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC,Nos.51973169,51703172);the Open Project Program of Wuhan National Laboratory for Optoelectronics(No.2020WNLOKF015);the Science Foundation of Wuhan Institute of Technology(No.K202025).

摘　　要：Small-molecule organic solar cells(SMOSCs)have attracted considerable attention owing to the merits of small molecules,such as easy purification,well-defined chemical structure.To achieve high-performance SMOSCs,the rational design of well-matched donor and acceptor materials is extremely essential.In this work,two new small molecular donor materials with subtle change in the conjugated side thiophene rings are synthesized.The subtle change significantly affects the photovoltaic performance of molecular donors.Compared with chlorinated molecule MDJ-Cl,the non-chlorinated analogue MDJ exhibits decreased miscibility with the non-fullerene acceptor Y6,can more efficiently quench the excitons of Y6.As a result,a improved PCE of 11.16% is obtained for MDJ:Y6 based SMOSCs.The results highlight the importance of fine-tuning the molecular structure to achieve high-performance SMOSCs.

关 键 词：Organic solar cells Small molecular donor materials CHLORINATION MISCIBILITY Photovoltaic performance 

分 类 号：TB30[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]