Effect of side chain length on molecular ordering and field-effect mobility in poly(3-alkylthiophene) transistors

被引：145

作者：

Park, Yeong Don ^{[1
]}

Kim, Do Hwan ^{[1
]}

Jang, Yunseok ^{[1
]}

Cho, Jeong Ho ^{[1
]}

Hwang, Minkyu ^{[1
]}

Lee, Hwa Sung ^{[1
]}

Lim, Jung Ah ^{[1
]}

Cho, Kilwon ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Polymer Res Inst, Dept Chem Engn, Pohang 790784, Gyungbuk, South Korea

来源：

ORGANIC ELECTRONICS | 2006年 / 7卷 / 06期

基金：

欧洲研究理事会;

关键词：

side chain length; field-effect transistors; poly(3-alkylthiophene);

D O I：

10.1016/j.orgel.2006.07.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of alkyl side chain length on the molecular ordering and electrical properties of regioregular poly(3-alkylthiophene) (P3AT)-based field-effect transistors (FETs) was investigated using P3ATs with various alkyl side chain lengths (-(CH2)(n) CH3, n = 3, 5, and 7) as active materials. The inner structures and surface morphologies of the P3ATs thin films fabricated on an insulator substrate were characterized, and the electrical properties of FETs based on these films were correlated with the structure and alkyl chain length of the P3ATs. The FET based on poly(3-butylthiophene), which has the shortest alkyl side chains among the three P3ATs considered, showed the highest field-effect mobility, possibly because the film formed from molecules with short butyl side chains had a higher density of pi-stacked ordered structures in the charge transport region. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：514 / 520

页数：7

共 39 条

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