A benzo[ghi]-perylene triimide based double-cable conjugated polymer for single-component organic solar cells  

作　　者：Dan Wang Zhaofan Yang Feng Liu Chengyi Xiao Yonggang Wu Weiwei 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 [3]College of Basic Medicine,Hebei University,Baoding 071002,China

出　　处：《Chinese Chemical Letters》2022年第1期466-469,共4页中国化学快报（英文版）

基　　金：jointly supported by National Key R&D Program of China(Nos.2018YFA0208504,2017YFA0204702);National Natural Science Foundation of China(Nos.51773207,21574138,21905018);Natural Science Foundation of Hebei Province(No.B2020201032);further supported by the Fundamental Research Funds for the Central Universities(No.XK1802-2);Open Project of State Key Laboratory of Supramolecular Structure and Materials(No.sklssm202043)。

摘　　要：Single-component organic solar cells(SCOSCs)with high stability and simplified fabrication process are supposed to accelerate the commercialization of organic photovoltaics.However,the types of photo-active materials and photovoltaic performance of SCOSCs are still far lagging behind the bulk-heterojunction type organic solar cells(BHJ OSCs).It is still an arduous task to introduce new photo-active materials into SCOSCs,aiming to improve the efficiencies of SCOSCs.One feasible way is to construct double-cable polymers with new structures and tune conformation,morphology and mobility for the improvement in power conversion efficiencies(PCEs).Hence,in this work,we constructed a new double-cable polymer PBTT-BPTI by introducing fused core 5,7-dibromo-2,3-bis(2-ethylhexyl)benzo[1,2-b:4,5-c’]dithiophene-4,8-dione(TTDO)into the main backbone and benzo[ghi]-perylene triimide(BPTI)unit into the side chain.Both of the two units show strong electron-withdrawing property,which are expected to broaden absorption spectra and enhance intermolecular interaction.The double-cable polymer exhibited a broad absorption in the range of 300-700 nm with an optical band gap(E_(g))of 1.79 eV.The PCE of PBTT-BPTI-based SCOSCs was 2.15%,which may be limited by the unconstructed efficient electron transporting channels.

关 键 词：Double-cable polymer Single-component organic solar cells BPTI Electron withdrawing Electron transporting channels 

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]