Effect of polymer chain conformation on field-effect transistor performance: synthesis and properties of two arylene imide based D-A copolymers

被引:35
作者
Chen, Dugang [2 ]
Zhao, Yan [1 ]
Zhong, Cheng [2 ]
Gao, Siqi [2 ]
Yu, Gui [1 ]
Liu, Yunqi [1 ]
Qin, Jingui [2 ]
机构
[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
[2] Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China
基金
美国国家科学基金会;
关键词
HIGH-MOBILITY; SEMICONDUCTING POLYMERS; POLYTHIOPHENE; THIOPHENE; DESIGN;
D O I
10.1039/c2jm31755a
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Two donor-acceptor (D-A) alternating copolymers (P1 and P2) with phthalimide or thieno[3,4-c] pyrrole-4,6-dione as the electron acceptor and bithiophene as the electron donor have been synthesized by Stille polycondensation. Both polymers showed good thermal stability and a low HOMO level. Organic field-effect transistor (OFET) devices with common architectures were fabricated to evaluate and compare the FET properties of the two polymers. Though P2 exhibits better coplanarity than P1, the FET results revealed that both the hole mobility and current on-off ratio of P1 are more than one order of magnitude higher than P2. Theoretical calculations and AFM were conducted to analyze the reason for this very interesting result, and it was found that polymer chain conformation is another important factor (in addition to coplanarity) for polymers to obtain high FET performance.
引用
收藏
页码:14639 / 14644
页数:6
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