An asymmetric non-fused electron-deficient building block for low-cost polymer acceptor in all-polymer solar cells  

作　　者：Haiqin Xiao Linfeng Yu Zhiliang Zhang Haiyan Liang Yu Shi Xia Guo Maojie Zhang Yongfang Li 

机构地区：[1]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 [2]National Engineering Research Center for Colloidal Materials,School of Chemistry&Chemical Engineering,Shandong University,Jinan 250100,China [3]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Science China Chemistry》2023年第9期2626-2633,共8页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (51973146);the Shandong Provincial Natural Science Foundation (ZR2022JQ09);the Collaborative Innovation Center of Suzhou Nano Science & Technology。

摘　　要：The development of polymerized fused-ring small molecule acceptors(FRA-PAs) has boosted the performance of all-polymer solar cells(all-PSCs).However,these FRA-PAs suffer from lengthy synthesis steps and high production costs due to the high degree of synthetic complexity for fused-ring small molecule acceptors(FRAs).Furthermore,most FRA-PAs exhibit strong batch-to-batch variation,limiting further industrial applications.Herein,we designed and synthesized asymmetric non-fused electron-deficient building block TIC-Br with a simple structure(only three synthetic steps),showing a planar configuration,excellent electron affinity,and large dipole moment.A simple polymer acceptor PTIB was further developed by polymerization of TIC-Br and sensitized fluorinated-thienyl benzodithiophene(BDT-TF-Sn).PTIB exhibits a broad absorption from 300 to 800 nm,a suitable lowest unoccupied molecular orbital(LUMO) energy level of-3.86 e V,and moderate electron mobility(1.02×10^(-4)cm^(2)V^(-1)s^(-1)).When matched with PM6,the device achieved the best PCE of 10.11%with a high V_(OC) of 0.97 V,which is one of the highest among those reported all-PSCs.More importantly,PTIB exhibits a lower synthetic complexity index(SC=35.0%)and higher figure-of-merit values(FOM=29.0%) than all the reported high-performance PAs.The polymer also exhibits excellent batch-to-batch reproducibility and great potential for scale-up fabrication.This study indicates that TIC-Br is a promising building block for constructing low-cost polymer acceptors for large-scale applications in all-PSCs.

关 键 词：non-fused electron-deficient building block low-cost polymer acceptors batch-to-batch reproducibility all-polymer solar cells 

分 类 号：TM914.4[电气工程—电力电子与电力传动] O631[理学—高分子化学]