Application of pentacene thin-film transistors with controlled threshold voltages to enhancement/depletion inverters

Hajime Takahashi, Yuki Hanafusa, Yoshinari Kimura, Masatoshi Kitamura

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Oxygen plasma treatment has been carried out to control the threshold voltage in organic thin-film transistors (TFTs) having a SiO2 gate dielectric prepared by rf sputtering. The threshold voltage linearly changed in the range of -3.7 to 3.1 V with the increase in plasma treatment time. Although the amount of change is smaller than that for organic TFTs having thermally grown SiO2, the tendency of the change was similar to that for thermally grown SiO2. To realize different plasma treatment times on the same substrate, a certain region on the SiO2 surface was selected using a shadow mask, and was treated with oxygen plasma. Using the process, organic TFTs with negative threshold voltages and those with positive threshold voltages were fabricated on the same substrate. As a result, enhancement/depletion inverters consisting of the organic TFTs operated at supply voltages of 5 to 15 V.

Original languageEnglish
Article number03EH03
JournalJapanese journal of applied physics
Volume57
Issue number3
DOIs
Publication statusPublished - 2018 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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