Ink-jet printing of organic semiconductor for fabricating organic thin-film transistors: Film uniformity control by ink composition

被引：13

作者：

Kim, Dongjo ^{[1
]}

Jeong, Sunho ^{[1
]}

Lee, Seong Hui ^{[1
]}

Moon, Jooho ^{[1
]}

Song, Jun Kwang ^{[2
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

[2] Korea Testing Lab, Mat Testing Team, Seoul 152718, South Korea

来源：

SYNTHETIC METALS | 2009年 / 159卷 / 13期

关键词：

Ink-Jet printing; Organic thin-film transistor; Ink; Organic semiconductor; EVAPORATION; POLYMERS; BEHAVIOR; DOTS;

D O I：

10.1016/j.synthmet.2009.02.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the influence of solvent chemistry on ink-jet printed semiconductor patterns. Our research focuses on improving the uniformity of an ink-jet printed single dot semiconductor by adjusting the solvent mixture combination. Use of a solvent mixture with one solvent of a lower boiling point and a higher solubility with respect to the semiconductor molecules and another of a higher boiling point and a lower solubility allows us to produce a uniform single dot pattern by ink-jet printing. It was observed that the film uniformity of the semiconductor layer plays an important role in determining the electrical parameters of the transistor. In comparison with uncontrolled ink composition, the OTFT fabricated from the well-controlled ink exhibited better device performance, including a carrier mobility of 8.5 x 10(-3) cm(2) V-1 s(-1) in the saturation regime, an on/off current ratio of 10(3), and a threshold voltage of 0.39 V with subthreshold slopes of 0.95 V dec(-1). (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1381 / 1385

页数：5

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