Small molecule donors with different conjugated π linking bridges: Synthesis and photovoltaic properties

作     者：Xiyue Dong Dingqin Hu Pengyu Chen Xuexin Dai Chao Hu Zeyun Xiao Shirong Lu Xiyue Dong;Dingqin Hu;Pengyu Chen;Xuexin Dai;Chao Hu;Zeyun Xiao;Shirong Lu

作者机构：Organic Semiconductor Research CenterChongqing Institute of Green and Intelligent TechnologyChongqing SchoolUniversity of Chinese Academy of Sciences(UCAS Chongqing)Chinese Academy of SciencesChongqing 400714China University of Chinese Academy of SciencesBeijing 100049China University of ManchesterManchester M139PLUK School of Chemistry and Chemical EngineeringQiannan Normal University for NationalitiesDuyun 558000China 

出 版 物：《Journal of Semiconductors》 (半导体学报（英文版）)

年 卷 期：2020年第41卷第12期

页      面：17-23,24-33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：This work was supported by National Natural Science Foundation of China(21801238) National Youth Thousand Program Project(R52A199Z11) CAS Pioneer Hundred Talents Program B(Y92A010Q10) Organic Semiconductor Center of Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences 

主　　题：organic solar cell small molecule donor molecule energy levels morphology 

摘      要：Three small molecule(SM)donors,namely B-T-CN,B-TT-CN and B-DTT-CN,with differentπconjugated bridges were synthesized in this ***,with the conjugated fused rings of theπlinking bridge increasing,the SM HOMO levels exhibit a decline tendency with–5.27 eV for B-T-CN,–5.31 eV for B-TT-CN and–5.40 eV for *** blending the SM donors with the fullerene acceptor PC71BM,the all SM organic solar cells(OSCs)achieved high Vocs of 0.90 to 0.96 ***,the phase separation morphology and molecule stacking are also unexpectedly changed together with the enhancement of conjugated degree ofπbridges,resulting in a lower power conversion efficiency(PCE)for the B-DTT-CN:PC71BM *** results demonstrate and provide a useful way to enhance OSC Voc and the morphology needs to be further optimized.