Polymer/ AlOx bilayer dielectrics for low-voltage organic thin-film transistors

Jeong M. Choi, D. K. Hwang, S. H. Jeong, Ji Hoon Park, Eugene Kim, Jae Hoon Kim, Seongil Im

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We report on the low-voltage-driven organic thin-film transistors (OTFTs) with various organic films [pentacene, tetracene, and copper-phthalocyanine (CuPc)] for the semiconductor channel on a thin poly-4-vinylphenol (PVP)/aluminum oxide (AlOx) bilayer gate dielectric. Quite a large capacitance of 31 nF cm2 and a high dielectric strength of ∼4 MVcm were achieved from the 45 nm thin polymer100 nm thick A1 Ox bilayer dielectric. All the organic channel layers deposited on the bilayer exhibited good crystalline quality as characterized by both X-ray diffraction (XRD) and atomic force microscopy (AFM) surface imaging because the bilayer had a smoothened and hydrophobic PVP surface on top. Our OTFTs with the bilayer dielectric exhibited good field-effect mobilities of 0.55, 0.07, and 0.004 cm2 V s for pentacene, tetracene, and CuPc channels, respectively, at a low operating voltage of less than -8 V.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume154
Issue number5
DOIs
Publication statusPublished - 2007 Apr 10

Fingerprint

Aluminum Oxide
Thin film transistors
low voltage
Polymers
transistors
aluminum oxides
Aluminum
Oxides
polymers
Electric potential
thin films
Gate dielectrics
Atomic force microscopy
Capacitance
Semiconductor materials
Crystalline materials
Copper
Imaging techniques
X ray diffraction
capacitance

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Choi, Jeong M. ; Hwang, D. K. ; Jeong, S. H. ; Park, Ji Hoon ; Kim, Eugene ; Kim, Jae Hoon ; Im, Seongil. / Polymer/ AlOx bilayer dielectrics for low-voltage organic thin-film transistors. In: Journal of the Electrochemical Society. 2007 ; Vol. 154, No. 5.
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Polymer/ AlOx bilayer dielectrics for low-voltage organic thin-film transistors. / Choi, Jeong M.; Hwang, D. K.; Jeong, S. H.; Park, Ji Hoon; Kim, Eugene; Kim, Jae Hoon; Im, Seongil.

In: Journal of the Electrochemical Society, Vol. 154, No. 5, 10.04.2007.

Research output: Contribution to journalArticle

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AU - Choi, Jeong M.

AU - Hwang, D. K.

AU - Jeong, S. H.

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AU - Kim, Eugene

AU - Kim, Jae Hoon

AU - Im, Seongil

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