High-performance polythiophene thin-film transistors with nematic liquid crystal modification

被引：5

作者：

Dai, Min-Kun ^{[1
]}

Lian, Jan-Tien ^{[2
]}

Lin, Tai-Yuan ^{[2
]}

Chen, Ming-Chung ^{[3
]}

Tai, Yian ^{[3
]}

Chen, Yang-Fang ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan

[2] Natl Taiwan Ocean Univ, Inst Optoelect Sci, Keelung 202, Taiwan

[3] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan

来源：

ORGANIC ELECTRONICS | 2012年 / 13卷 / 11期

关键词：

Nematic liquid crystal; Conjugated polymer; Crystallinity; Organic thin film transistor; FIELD-EFFECT TRANSISTORS; REGIOREGULAR POLY(3-HEXYLTHIOPHENE); ORGANIC TRANSISTORS; HIGH-MOBILITY; ENHANCEMENT; TRANSPORT;

D O I：

10.1016/j.orgel.2012.06.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of nematic liquid crystal molecules on the electrical properties and microstructure of polymer semiconductors poly(3-hexylthiophene) (P3HT) was investigated. It was found that the introduction of nematic liquid crystal molecules can significantly improve the performance of P3HT thin-film transistors, providing better electrical characteristics and enhanced mobility. The field-effect mobility of the device with liquid crystal modification can be enhanced by up to a factor of ten with respect to that of the pure P3HT device. UV-visible absorption spectroscopy, X-ray diffraction, and atomic force microscopy measurements show that the enhancement of charge-carrier mobility is achieved through a more highly organized morphology and a reduction in the density of traps presents in the P3HT/liquid crystal structure. The results shown here therefore illustrate a high-performance solution-processable thin-film transistors, which is quite feasible and can pave a key step for the practical applications of organic electronic devices. (C) 2012 Elsevier By. All rights reserved.

引用

页码：2229 / 2234

页数：6

共 21 条

[1] Soluble and processable regioregular poly(3-hexylthiophene) for thin film field-effect transistor applications with high mobility [J].