Benzothiadiazole-based Conjugated Polymers for Organic Solar Cells  

作　　者：Chao Wang Feng Liu Qiao-Mei Chen Cheng-Yi Xiao Yong-Gang Wu Wei-Wei Li 

机构地区：[1]College of Chemistry and Environmental Science,Hebei University,Baoding 071002,China [2]Beijing Advanced Innovation Center for Soft Matter Science and Engineering&State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China

出　　处：《Chinese Journal of Polymer Science》2021年第5期525-536,I0004,共13页高分子科学（英文版）

基　　金：financially supported by the Ministry of Science and Technology(Nos.2018YFA0208504 and 2017YFA0204702);the National Natural Science Foundation of China(Nos.51773207,52073016,and 21905018);supported by Fundamental Research Funds for the Central Universities(No.XK1802-2);Jiangxi Provincial Department of Science and Technology(No.20192ACB20009);the Natural Science Foundation of Hebei Province(No.B2020201032)。

摘　　要：Benzothiadiazole(BT)is an electron-deficient unit with fused aromatic core,which can be used to construct conjugated polymers for application in organic solar cells(OSCs).In the past twenty years,huge numbers of conjugated polymers based on BT unit have been developed,focusing on the backbone engineering(such as by using different copolymerized building blocks),side chain engineering(such as by using linear or branch side units),using heteroatoms(such as F,O and S atoms,and CN group),etc.These modifications enable BT-polymers to exhibit distinct absorption spectra(with onset varied from 600 nm to 1000 nm),different frontier energy levels and crystallinities.As a consequence,BT-polymers have gained much attention in recent years,and can be simultaneously used as electron donor and electron acceptor in OSCs,providing the power conversion efficiencies(PCEs)over 18%and 14%in non-fullerene and all-polymer OSCs.In this article,we provide an overview of BT-polymers for OSCs,from donor to acceptor,via selecting some typical BT-polymers in different periods.We hope that the summary in this article can invoke the interest to study the BT-polymers toward high performance OSCs,especially with thick active layers that can be potentially used in large-area devices.

关 键 词：BENZOTHIADIAZOLE Conjugated polymer Organic solar cells Electron donor Electron acceptor 

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]