A high mobility ambipolar field effect transistor using a 2,6-diphenylbenzo[1,2-b:4,5-b ′]diselenophene/fullerene double layer

Shohei Kinoshita, Tomo Sakanoue, Masayuki Yahiro, Kazuo Takimiya, Hideaki Ebata, Masaaki Ikeda, Hirokazu Kuwabara, Chihaya Adachi

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A high mobility ambipolar field effect transistor (FET) was fabricated using a double-layer structure composed of 2,6-diphenylbenzo[1,2-b:4,5-b′]diselenophene (DPh-BDS) as a p-type layer and fullerene (C60) as an n-type layer. The FET characteristics showed a large dependence on the DPh-BDS thickness, and excellent ambipolar behavior with the maximum electron and hole mobilities of μe = 3.0 cm2 / V s and μh = 0.10 cm2 / V s was obtained with the optimum DPh-BDS thickness of 10-20 nm. The result indicates that the μe of C60 was considerably enhanced by keeping it away from the electron traps on the SiO2 surface and by improving the crystalline texture of the C60, which was achieved by the underlying DPh-BDS buffer layer having a rather high hole mobility on the SiO2 layer.

Original languageEnglish
Pages (from-to)114-117
Number of pages4
JournalSolid State Communications
Issue number3
Publication statusPublished - Jan 1 2008


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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