Quinoxaline-based Polymers with Asymmetric Aromatic Side Chain Enables 16.27% Efficiency for Organic Solar Cells  

作　　者：Dong-Xu Li Shu-Fang Li Cheng-Long Wen Chao-Yuan Sun Chang-Zhou Shi Xin-Xin Xia Xin-Hui Lu Li-Hui Jiang Jun Yuan Ying-Ping Zou 

机构地区：[1]College of Chemistry and Chemical Engineering,Central South University,Changsha,410083,China [2]Department of Physics,The Chinese University of Hong Kong,New Territories,Hong Kong,999077,China

出　　处：《Chinese Journal of Polymer Science》2023年第7期1002-1010,共9页高分子科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21875286 and 52125306,);J.Yuan acknowledges the National Natural Science Foundation of China(No.22005347);the Natural Science Foundation of Hunan Province(No.2021JJ20068);L.Jiang acknowledges the Open Sharing Fund for the Large-scale Instruments and Equipments of Central South University(No.CSUZC202218);the Natural Science Foundation of Hunan Province(No.2021JJ30793).

摘　　要：In recent years, due to the rapid development of high-performance small molecule acceptor (SMA) materials, the researches on p-type electron donor materials for matching with current efficient SMAs have become important. By means of asymmetric strategies to optimize the energy levels and inter/intramolecular interactions of molecules, we designed and synthesized an asymmetric aromatic side chain quinoxaline-based polymer donor TPQ-0F. Meanwhile, we took advantage of F atom which could form noncovalent interaction and strong electron-withdrawing property, to obtain the optimized quinoxaline-based polymer donors TPQ-1F, TPQ-1Fi and TPQ-2F. Eventually, the binary device based on TPQ-2F achieved an efficient power conversion efficiency (PCE) of 16.27%, which attributed to balanced hole/electron mobilities, less charge carrier recombination, and more favorable aggregation morphology. Our work demonstrates the great potential of asymmetric aromatic side chain quinoxaline-based polymer donors on optimizing the morphology of blending films, improving inter/intramolecular interactions, and subtly tuning energy level, finally for more efficient organic solar cells.

关 键 词：Asymmetric aromatic side chain Quinoxaline-based polymer donor Fluorine substitution Binary device 

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