Chlorinated polymerized small molecule acceptor enabling ternary all-polymer solar cells with over 16.6% efficiency  

作　　者：Ke Hu Jiaqi Du Can Zhu Wenbin Lai Jing Li Jingming Xin Wei Ma Zhanjun Zhang Jinyuan Zhang Lei Meng Yongfang Li 

机构地区：[1]School of Chemical Science,University of Chinese Academy of Sciences,Beijing 100049,China [2]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [3]Key Laboratory of Photochemical Conversion and Optoelectronic Materials,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China [4]State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China [5]Laboratory of Advanced Optoelectronic Materials,Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China

出　　处：《Science China Chemistry》2022年第5期954-963,共10页中国科学（化学英文版）

基　　金：supported by the National Key Research and Development Program of China (2019YFA0705900);funded by MOST;the National Natural Science Foundation of China (51820105003, 21734008, 61904181, 52173188, 21704082, 21875182);the Basic and Applied Basic Research Major Program of Guangdong Province (2019B030302007);Key Scientific and Technological Innovation Team Project of Shaanxi Province (2020TD-002);111 Project 2.0 (BP2018008)。

摘　　要：Recently,all-polymer solar cells(all-PSCs) based on polymerized small molecule acceptors(PSMAs) have achieved significant progress.Ternary blending has proven to be an effective strategy to further boost the power conversion efficiency(PCE) of the all-PSCs.Herein,a new A-DA′D-A small-molecule acceptor-based PSMA(named as PYCl-T) was designed and synthesized,which possesses similar polymer backbone with the widely used PY-IT,but with chlorine substitution on the A-end groups in the A-DA′D-A structure.PYCl-T was then employed as the third component into the PM6:PY-IT system and the ternary all-PSCs based on PM6:PY-IT:PYCl-T demonstrated a high PCE of 16.62%(certified value of 16.3%).Moreover,the PCE of 15.52% was realized in the enlarged ternary all-PSCs with effective area of 1 cm^(2),indicating the great potential in large-scale applications.Moreover,the optimized ternary blend films of PM6:PY-IT:PYCl-T show excellent thermal stability at 150 ℃.This work demonstrates that the utilization of a ternary blend system involving two well-compatible PSMA polymer acceptors is an effective strategy to boost the performance of the all-PSCs.

关 键 词：all-polymer solar cells polymerized small molecular acceptors chlorine substitution ternary all polymer solar cells stability 

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]