Charge transport in monolayer poly(3-hexylthiophene) thin-film transistors

doi:10.1088/1674-1056/23/4/048501

Abstract It is found that ultrathin poly(3-hexylthiophene) (P3HT) film with a 2.5 nm-thick layer exhibits a higher mobility of 5.0× 10^-2 cm²/V·s than its bulk counterpart. The crystalline structure of the as-fabricated ultrathin P3HT layer is verified by atomic force microscopy as well as grazing incidence X-ray diffraction. Transient measurements of the as-fabricated transistors reveal the influence of the interface traps on charge transport. These results are explained by the trap energy level distribution at the interface manipulated by layers of polymer film.

Keywords: field-effect transistor monolayer P3HT spin coating grazing incidence X-ray diffraction

Received: 16 July 2013
Revised: 13 August 2013
Accepted manuscript online:

PACS:	85.30.Tv	(Field effect devices)
	72.80.Le	(Polymers; organic compounds (including organic semiconductors))
	81.05.Fb	(Organic semiconductors)

Fund: Project supported by the Special Funds for the Development of Strategic Emerging Industries in Shenzhen City, China (Grant No. JCYJ20120830154526537), the Start-up Funding of South University of Science and Technology of China, and the Strategic Research Grant of City University of Hong Kong of China (Grant No. 7002724).

Corresponding Authors: Xu Zong-Xiang
E-mail: xu.zx@sustc.edu.cn

About author: 85.30.Tv; 72.80.Le; 81.05.Fb

Cite this article:

Xu Zong-Xiang (许宗祥), Roy V. A. L. Charge transport in monolayer poly(3-hexylthiophene) thin-film transistors 2014 Chin. Phys. B 23 048501

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Charge transport in monolayer poly(3-hexylthiophene) thin-film transistors

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