An isoindigo-bithiazole-based acceptor-acceptor copolymer for balanced ambipolar organic thin-film transistors  

作　　者：Ping Li Hanlin Wang Lanchao Ma Long Xu Fei Xiao Zhengran Yi Yunqi Liu Shuai Wang 

机构地区：[1]Key Laboratory for Large-Format Battery Materials and System, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China [2]Flexible Electronics Research Center, State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China [3]State Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

出　　处：《Science China Chemistry》2016年第6期679-683,共5页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (51173055, 21504026, 51572094);the National Basic Research Program of China (2013CBA01600);the China Postdoctoral Science Foundation (2013M542009)

摘　　要：Balanced carrier transport is observed in acceptor-acceptor （A-A＇） type polymer for ambipolar organic thin-film transistors （OTFTs）. It is found that the incorporation of two electron-accepting moieties （BTz and IIG） into a polymer main chain to form A-A＇ polymer PIIG-BTz could lower highest occupied molecular orbital （HOMO） and lowest unoccupied molecular orbital （LUMO） levels and facilitate good molecular stacking of the polymer. Ambipolar transistor behaviour for PIIG-BTz, with the balanced hole and electron mobilities of 0.030 and 0.022 cm2 V 1 s-i was observed in OTFT devices, respectively. The study in this work reveals that the utilization of acceptor-acceptor （A-A＇） structure in polymer main chain can be a feasible strategy to develop ambipolar polymer semiconductors.Balanced carrier transport is observed in acceptor-acceptor (A-A′) type polymer for ambipolar organic thin-film transistors B (OTFTs). It is found that the incorporation of two electron-accepting moieties (BTz and IIG) into a polymer main chain to form A-A′ polymer PIIG-BTz could lower highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels and facilitate good molecular stacking of the polymer. Ambipolar transistor behaviour for PIIG-BTz, with the balanced hole and electron mobilities of 0.030 and 0.022 cm2 V-1 s-1 was observed in OTFT devices, respectively. The study in this work reveals that the utilization of acceptor-acceptor (A-A′) structure in polymer main chain can be a feasible strategy to develop ambipolar polymer semiconductors.

关 键 词：organic thin-film transistors acceptor-acceptor structure balanced ambipolar transport conjugated copolymer 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TN321.5[电子电信—物理电子学]