Regioisomeric Polymer Semiconductors Based on Cyano-Functionalized Dialkoxybithiophenes:Structure-Property Relationship and Photovoltaic Performance

作     者：Qingqing Bai Jun Huang Han Guo Suxiang Ma Jie Yang Bin Liu Kun Yang Huiliang Sun Han Young Woo Li Niu Xugang Guo Qingqing Bai;Jun Huang;Han Guo;Suxiang Ma;Jie Yang;Bin Liu;Kun Yang;Huiliang Sun;Han Young Woo;Li Niu;Xugang Guo

作者机构：Center for Advanced Analytical ScienceSchool of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou 510006China Department of Materials Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangdong 510640China Department of ChemistryKorea UniversitySeoul 136-713South Korea 

出 版 物：《Transactions of Tianjin University》 (天津大学学报（英文版）)

年 卷 期：2022年第28卷第5期

页      面：385-397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：supported by the National Natural Science Foundation of China(Nos.52173172,52173171,and 21801124) the Natural Science Foundation for Distinguished Young Scholars of Guangdong Province(2021B1515020027) Guangdong Basic and Applied Basic Research Foundation(2021A1515110892) China Postdoctoral Science Foundation(2021M700062) the Shenzhen Science and Technology Innovation Commission(JCYJ202103243104813035 and JCYJ20180504165709042) the Open Fund of the State Key Laboratory of Luminescent Materials and Devices(South China University of Technology) financial support from the Songshan Lake Materials Laboratory(2021SLABFK03) financial support from the NRF of Korea(2016M1A2A2940911,2017K2A9A2A12000315) supported by the Center for Computational Science and Engineering of Southern University of Science and Technology 

主　　题：Cyano substitution Regioselectivity Organic photovoltaic cells Polymer semiconductors Mobility 

摘      要：Cyano substitution is vital to the molecular design of polymer semiconductors toward highly efficient organic solar ***,how regioselectivity impacts relevant optoelectronic properties in cyano-substituted bithiophene systems remain poorly *** regioisomeric cyano-functionalized dialkoxybithiophenes BT_(HH),BT_(HT),and BT_(TT) with headto-head,head-to-tail,and tail-to-tail linkage,respectively,were synthesized and characterized in this *** resulting polymer semiconductors(PBDTBTs)based on these building blocks were prepared *** regiochemistry and property relationships of PBDTBTs were investigated in *** BTHH moiety has a higher torsional barrier than the analogs BT_(HT) and BT_(TT),and the regiochemistry of dialkoxybithiophenes leads to fine modulation in the optoelectronic properties of these polymers,such as optical absorption,band gap,and energy levels of frontier molecular *** field-effect transistors based on PBDTBT_(HH) had higher hole mobility(4.4×10^(-3) cm^(2)/(V·s))than those(ca.10^(-4) cm^(2)/(V·s))of the other two polymer *** different short-circuit current densities and fill factors were obtained in polymer solar cells using PBDTBTs as the electron *** difference was probed in greater detail by performing space-charge-limited current mobility,thin-film morphology,and transient photocurrent/photovoltage *** findings highlight that the BTHH unit is a promising building block for the construction of polymer donors for highperformance organic photovoltaic cells.