Photocurrent suppression of transparent organic thin film transistors

Chiao Shun Chuang*, Shu Ting Tsai, Yung Sheng Lin, Fang-Chung Chen, Hang Ping D Shieh

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Organic thin-film transistors (OTFTs) with high transmittance and low photosensitivity have been demonstrated. By using titanium dioxide nanoparticles as the additives in the polymer gate insulators, the level of device photoresponse has been reduced. The device shows simultaneously a high transparence and a minimal threshold voltage shift under white light illumination. It is inferred that the localized energy levels deep in the energy gap of pentacene behave as the recombination centers, enhancing substantially the recombination process in the conducting channel of the OTFTs. Therefore, the electron trapping is relieved and the shift of threshold voltage is reduced upon illumination.

Original languageEnglish
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume46
Issue number45-49
DOIs
StatePublished - 14 Dec 2007

Keywords

  • Organic
  • Photocurrent
  • Transistor

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