Ambipolar organic thin-film transistors using C 60 /pentacene structure

Characterization of electronic structure and device property

S. J. Kang, Yeonjin Yi, C. Y. Kim, K. Cho, J. H. Seo, M. Noh, KwangHo Jeong, Kyung-hwa Yoo, C. N. Whang

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We fabricated ambipolar organic thin-film transistors (OTFTs) using C60 and pentacene. The electronic structure of the interface was investigated by using ultraviolet photoelectron spectroscopy and x-ray photoelectron spectroscopy. The magnitude of the interface dipole and the band bendings at the interface was determined, and the complete energy level diagram for C60 on pentacene (C60 /pentacene) was obtained. The lowered band offsets, due to the enhanced charge redistribution in C60 /pentacene relative to pentacene on C60, are favorable for the ambipolar OTFTs. The measured field-effect mobilities were 0.017 cm2 V s and 0.007 cm2 V s for the p -channel and the n -channel operations, respectively. The threshold voltages were -2 V for the p channel and 15.6 V for the n channel, comparable to those of unipolar OTFTs using C60 or pentacene.

Original languageEnglish
Article number233502
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume87
Issue number23
DOIs
Publication statusPublished - 2005 Dec 12

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transistors
electronic structure
thin films
photoelectron spectroscopy
ultraviolet spectroscopy
threshold voltage
x ray spectroscopy
energy levels
diagrams
dipoles

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "We fabricated ambipolar organic thin-film transistors (OTFTs) using C60 and pentacene. The electronic structure of the interface was investigated by using ultraviolet photoelectron spectroscopy and x-ray photoelectron spectroscopy. The magnitude of the interface dipole and the band bendings at the interface was determined, and the complete energy level diagram for C60 on pentacene (C60 /pentacene) was obtained. The lowered band offsets, due to the enhanced charge redistribution in C60 /pentacene relative to pentacene on C60, are favorable for the ambipolar OTFTs. The measured field-effect mobilities were 0.017 cm2 V s and 0.007 cm2 V s for the p -channel and the n -channel operations, respectively. The threshold voltages were -2 V for the p channel and 15.6 V for the n channel, comparable to those of unipolar OTFTs using C60 or pentacene.",
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Ambipolar organic thin-film transistors using C 60 /pentacene structure : Characterization of electronic structure and device property. / Kang, S. J.; Yi, Yeonjin; Kim, C. Y.; Cho, K.; Seo, J. H.; Noh, M.; Jeong, KwangHo; Yoo, Kyung-hwa; Whang, C. N.

In: Applied Physics Letters, Vol. 87, No. 23, 233502, 12.12.2005, p. 1-3.

Research output: Contribution to journalArticle

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AU - Kang, S. J.

AU - Yi, Yeonjin

AU - Kim, C. Y.

AU - Cho, K.

AU - Seo, J. H.

AU - Noh, M.

AU - Jeong, KwangHo

AU - Yoo, Kyung-hwa

AU - Whang, C. N.

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