Surface modifications using thiol self-assembled monolayers on Au electrodes in organic field effect transistors

Nobuya Hiroshiba, Ryotaro Kumashiro, Naoya Komatsu, Yusuke Suto, Hisao Ishii, Shinya Takaishi, Masahiro Yamashita, Kazuhiro Tsukagoshi, Katsumi Tanigaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The influences of self-assembled-monolayers (SAMs) modifications on the gold electrodes in organic field effect transistors are studied using benzen-thiols (BzTs) having amino (NH2), nitro (NO2) and methyl (CH3) substituents and pentacene as an organic semiconductor. The field effect transistor (FET) characteristics are found to be very sensitive to the preparation condition of the SAMs modified surfaces. This can be rationalized in terms of the barriers against carrier injections made by SAMs and this situation can be monitored using a surface contact-angle method. The enhancement in the field effect mobilities μ s is observed when the SAMs modifications to the electrodes are applied, and this could be caused by the higher efficiency of carrier injection attained by the hole transfer from SAMs to pentacene molecules.

Original languageEnglish
Title of host publicationOrganic Electronics
Subtitle of host publicationMaterials, Devices and Applications
Pages264-269
Number of pages6
Volume965
Publication statusPublished - 2006 Dec 1
Externally publishedYes
Event2006 MRS Fall Meeting - Boston, MA
Duration: 2006 Nov 272006 Dec 1

Other

Other2006 MRS Fall Meeting
CityBoston, MA
Period06/11/2706/12/1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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