Orientation of organic semiconductor films on photoreactive polyimide films and its influence on field-effect transistor characteristics

Hiroshi Kikuchi, Yuichiro Uchida, Yoshihide Fujisaki, Hiroto Sato, Hideo Fujikake, Taiichiro Kurita, Kuniharu Takizawa, Fumio Sato

Research output: Contribution to journalArticle

Abstract

In this study, we have investigated the effect of surface treatment on the orientation and mobility of pentacene by using a photoreactive polyimide film to modify the gate-insulator surfaces of organic field effect transistors (OFETs). Surface modification includes a photoreactive polyimide film, presenting a passivated interface on which the semiconductor can grow. This polyimide film can control of the orientation of semiconductor by using linearly polarized deep UV (LPDUV) irradiation. Fabricated OFETs include stacked structures of Ta 2O5 as the gate insulators and the photoreactive polyimide. Most of the characteristic parameters of the OFETs, such as carrier mobility and on/off current ration, have been improved by using the photo-alignment treatment achieved with LPDUV irradiation.

Original languageEnglish
JournalNHK Laboratories Note
Issue number497
Publication statusPublished - 2006 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Media Technology
  • Mechanical Engineering
  • Marketing

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