Small bandgap non-fullerene acceptor enables efficient PTB7-Th solar cell with near 0 eV HOMO offset  

作　　者：Chao Li Qihui Yue Hao Wu Baolin Li Haijun Fan Xiaozhang Zhu 

机构地区：[1]School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 101408,China [2]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Journal of Energy Chemistry》2021年第1期60-66,I0003,共8页能源化学（英文版）

基　　金：the National Key R&D Program of China (2017YFA0204701);Strategic Priority Research Program of the Chinese Academy of Sciences (XDB12010200);National Basic Research Program of China (Program 973) (No. 2014CB643502);the National Natural Science Foundation of China (21572234, 21661132006, 91833304, 21402194) for their financial support。

摘　　要：Three small bandgap non-fullerene(SBG NFAs) acceptors,BDTI,BDTI-2 F and BDTI-4 F,based on a carbon-oxygen bridged central core and thieno[3,4-b]thiophene linker,end-capped with varied electronwithdrawing terminal groups,were designed and synthesized.The acceptors exhibit strong absorption from 600 nm to 1000 nm.The optimal device incorporating designed NFA and PTB7-Th polymer donor achieves a power conversion efficiency of 9.11% with near 0 eV HOMO offset.The work presents a case study of efficient non-fullerene solar cells with small HOMO offsets,which is achieved by blending PTB7-Th with fine-tuned SBG acceptor.

关 键 词：Organic solar cells Non-fullerene acceptors Small bandgap Driving force HOMO offset 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]