Low-bandgap conjugated polymers based on benzodipyrrolidone with reliable unipolar electron mobility exceeding 1 cm^(2) V^(-1)s^(-1)  

作　　者：Mingqun Yang Tian Du Xuxia Zhao Xuelong Huang Langheng Pan Shuting Pang Haoran Tang Zhongxiang Peng Long Ye Yunfeng Deng Mingliang Sun Chunhui Duan Fei Huang Yong Cao 

机构地区：[1]School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China [2]Institute of Polymer Optoelectronic Materials and Devices,State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640,China [3]School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China [4]College of Pharmacy,Gannan Medical University,Ganzhou 341000,China [5]State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116024,China

出　　处：《Science China Chemistry》2021年第7期1219-1227,共9页中国科学（化学英文版）

基　　金：supported by the Ministry of Science and Technology of China(2017YFA0206600,2019YFA0705900);the National Natural Science Foundation of China(21875072,21774093);the Fundamental Research Funds for Central Universities(South China University of Technology,D2190310);Guangdong Innovative and Entrepreneurial Research Team Program(2019ZT08L075);the Open Funds of State Key Laboratory of Fine Chemicals(KF1901)。

摘　　要：The employment of an intrinsic quinoidal building block,benzodipyrrolidone(BDP),on constructing conjugated polymers(PBDP-2F and PBDP-2CN)with high electron mobility and unipolar transport characteristic in polyethylenimine ethoxylated(PEIE)modified organic field-effect transistors(OFETs)is reported.The intrinsic quinoidal characteristic and excellent coplanarity of BDP can lower the lowest unoccupied molecular orbital(LUMO)levels and improve ordered interchain packing of the resulting polymers in solid states,which are favorable for electron-injection and transport.By using PEIE as the interlayer to block the hole injection,unipolar n-type transport characteristics with high electron mobility of 0.58 and 1.01 cm^(2) V^(-1)s^(-1)were achieved by the OFETs based on PBDP-2F and PBDP-2CN,respectively.More importantly,the extracted mobilities are highly reliable with the reliability factor of above 80%.To the best of our knowledge,PBDP-2CN is the very first quinoid-based conjugated polymer with reliable electron mobility exceeding 1 cm^(2) V^(-1)s^(-1).This work represents a significant step in exploring intrinsic quinoidal CPs for application in n-channel OFETs and logic complementary circuits.

关 键 词：field-effect transistors electron mobility conjugated polymers quinoidal structure benzodipyrrolidone 

分 类 号：TN386[电子电信—物理电子学] TQ317[化学工程—高聚物工业]