Significant improvement of electron mobility in organic thin-film transistors based on thiazolothiazole derivative by employing self-assembled monolayer

被引：74

作者：

Kumaki, Daisuke

Ando, Shinji

Shimono, Satoshi

Yamashita, Yoshiro

Umeda, Tokiyoshi

Tokito, Shizuo

机构：

[1] NHK Japan Broadcasting Corp, Setagaya Ku, Tokyo 1578510, Japan

[2] Tokyo Inst Technol, Dept Elect Chem, Midori Ku, Yokohama, Kanagawa 2268502, Japan

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 05期

关键词：

D O I：

10.1063/1.2436641

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

n-type organic thin-film transistors based on a thiazolothiazole derivative were fabricated on a SiO2 gate insulator treated with n-alkyl self-assembled monolayers (SAMs), which were composed of various alkyl chain lengths. The field-effect electron mobility increased depending on the alkyl chain length of the SAMs. A long alkyl chain significantly improved the on current and electron mobility. The highest electron mobility of 1.2 cm(2)/V s and on/off ratio of 10(7) were achieved with an alkyl chain longer than that of tetradecyl-trichlorosilane. This result is attributed to the suppression of the influence of electron trap sites on the SiO2 gate insulator by employing the SAM with the long alkyl chain.

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页数：3

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