Enhanced electrical properties of organic thin film transistors by the pentacene order on a photo-aligned polymeric insulator

Jin Hyuk Bae, Won Ho Kim, Jun Hee Na, Sin Doo Lee

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the surface-induced molecular order and the optical anisotropy of a pentacene thin film on a photo-aligned polymeric gate insulator layer. Since a pentacene molecule has a rodlike shape, the induced orientational order of the pentacene molecules is expected on an alignment layer for liquid crystal molecules. The photo-aligned polymer insulator, exposed to a linearly polarized ultraviolet light, has a high cross-linked density and thus induces the structural order of the pentacene molecules. The pentacene thin film deposited on the photo-aligned polymeric insulator is found to show the optical anisotropy. The organic thin film transistor on the photo-aligned insulator exhibits good electrical properties.

Original languageEnglish
Pages (from-to)141/[387]-148/[394]
JournalMolecular Crystals and Liquid Crystals
Volume476
Issue number1
DOIs
StatePublished - Jan 2007

Keywords

  • Optical anisotropy
  • Organic thin film transistors
  • Pentacene film
  • Photo-aligned polymeric insulator

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