8.30%Efficiency P3HT-based all-polymer solar cells enabled by a miscible polymer acceptor with high energy levels and efficient electron transport

作     者：Ziqi Liang Jiangting He Bin Zhao Mengyuan Gao Yu Chen Long Ye Miaomiao Li Yanhou Geng 

作者机构：School of Materials Science and Engineeringand Tianjin Key Laboratory of Molecular Optoelectronic ScienceTianjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin UniversityBinhai New CityFuzhou 350207China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin 300072China Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2023年第66卷第1期

页      面：216-227页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(22075200,52121002) the Fundamental Research Funds for the Central Universities 

主　　题：all-polymer solar cells poly(3-hexylthiophene) polymer acceptors energy levels film morphology 

摘      要：P3HT stands out from numerous polymer donors owing to the merits of low cost and high scalability of ***,the photovoltaic performance of P3HT-based blends lags significantly behind the state-of-the-art systems,especially for all-polymer solar cells(APSCs) that generally show efficiency of around 3%–4% due to the lack of matched polymer ***,a polymer acceptor,named IDTBTC8-CN,was designed and synthesized with indacenodithiophene(IDT) and mono-cyano(CN)-substituted benzothiadiazole(BT-CN) as building *** a CN group endowed the polymer with decreased bandgap,and apparent n-type charge transport character despite the relatively high energy ***,IDTBTC8-CN showed largely improved miscibility with P3HT,compared with that of BT-based control polymer *** high miscibility between P3HT and IDTBTC8-CN as well as the amorphous aggregation behavior of IDTBTC8-CN enabled a broad manipulation room for the blend film to acquire favorable ***,a champion efficiency of 8.30% was achieved,in sharp contrast to that of the IDTBTC8-based system(1.21%).Such efficiency is a new record for P3HT-based APSCs reported so ***,P3HT:IDTBTC8-CN blend film also exhibited excellent mechanical *** study implies the guidance of molecular design of the polymer acceptors and morphology control for P3HT-based APSCs.