Dithiene-fused quinoxalineimide-based all-acceptor polymers for n-type organic semiconductors

被引:1
|
作者
Tu, Lijun [1 ,2 ]
Wang, Hao [1 ,2 ]
Li, Xiangya [1 ,2 ]
Wang, Xin [1 ,2 ]
Li, Mingwei [1 ,2 ]
Wang, Yang [3 ]
Shi, Yongqiang [1 ,2 ]
机构
[1] Anhui Normal Univ, Key Lab Funct Mol Solids, Minist Educ, Wuhu 241002, Anhui, Peoples R China
[2] Anhui Normal Univ, Sch Chem & Mat Sci, Wuhu 241002, Anhui, Peoples R China
[3] Fudan Univ, Dept Mat Sci, Lab Mol Mat & Devices, State Key Lab Mol Engn Polymers, 2005 Songhu Rd, Shanghai 200438, Peoples R China
基金
中国国家自然科学基金;
关键词
STRUCTURE-PROPERTY CORRELATIONS; DEFICIENT BUILDING-BLOCK; CONJUGATED POLYMERS; ELECTRON-TRANSPORT; IMIDE; MOBILITY; DERIVATIVES; TRANSISTORS; STRATEGIES; DESIGN;
D O I
10.1039/d3tc02243a
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Introduction of strong electron-deficient building blocks into the polymer backbone is an efficient strategy to design n-type organic semiconductors. In this work, a strong electron-deficient building block, dithiene-fused quinoxalineimide (DTQI), containing electron-withdrawing quinoxaline and imide units, was synthesized and incorporated into a polymer backbone. The frontier molecular orbital (FMO) energy levels downshifted with the incorporation of the quinoxalineimide (QI) unit onto the framework. Owing to the high electron-affinity of DTQI, the DTQI-based acceptor-acceptor (all-acceptor, A-A) type polymer P(DTQI-BTI) showed deep-lying highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels, thus yielding unipolar n-type transport character with electron mobility of 0.25 cm(2) V-1 s(-1) in organic thin-film transistors. These results demonstrate that DTQI is a promising building block for constructing n-type polymer semiconductors and can be extended to the design of other novel electron-deficient building blocks.
引用
收藏
页码:11905 / 11911
页数:7
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