Flexible organic thin-film transistors using single-walled carbon nanotubes as an activated channel

Jae Hong Kwon, Sang Il Shin, Myung Ho Chung, Ki Young Dong, James Jungho Pak, Byeong Kwon Ju

Research output: Contribution to journalArticle

Abstract

We report on the fabrication of organic thin-film transistors (OTFTs) with a spun cross linked poly-4-vinylphenol (PVP) dielectric on a polyethersulphone (PES) flexible substrate. To improve the electrical performance of OTFTs, we employed a random single-walled carbon nanotubes (SWNTs) network as a carrier transfer underlay without sacrificing the flexibility of the TFTs. The random SWNTs showed that they can act as a semiconducting channel and conduction path to shorten the channel length in our TFTs. The flexible thin-film transistors (TFTs) with a random SWNTs/pentacene bilayer as an active channel exhibited an improved saturation field effect mobility (μsat) of 2.6 × 10- 1 cm2/Vs compared to that of TFTs without the SWNTs underlay, while creating only a minor reduction of the current on/off ratio.

Original languageEnglish
Pages (from-to)6168-6173
Number of pages6
JournalThin Solid Films
Volume518
Issue number22
DOIs
Publication statusPublished - 2010 Sep 1

Keywords

  • Cross-linked poly-4-vinylphenol
  • Flexible organic thin-film transistors
  • Pentacene
  • Polyethersulphone
  • Single-walled carbon nanotubes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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