Improved dynamic properties of ZnO-based photo-transistor with polymer gate dielectric by ultraviolet treatment

Kimoon Lee, Ki Tae Kim, Jeong M. Choi, Min Suk Oh, D. K. Hwang, Sungjin Jang, Eugene Kim, Seongil Im

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The authors report on the fabrication of photo-detecting top-gate ZnO-based thin-film transistors (ZnO-TFTs) with poly-4-vinylphenol (PVP) polymer gate dielectric. A ZnO channel surface was treated by intense ultraviolet (UV, wavelength of 352 nm) before making contacts with PVP dielectric. Although our UV-treated devices showed lower on-state current than untreated pristine ones, the former also displayed orders of magnitude lower off-state current than the latter. We applied the UV-treated devices for enhancing their photo-detection properties, which basically needs low off-state current. Under a modulated photon signal (10 Hz, 364 nm) for the UV detection measurements, our photo-inverter with UV-treated ZnO-TFT exhibited a good dynamic property of ∼30 ms operating at 5 V.

Original languageEnglish
Article number135102
JournalJournal of Physics D: Applied Physics
Volume41
Issue number13
DOIs
Publication statusPublished - 2008 Jul 7

Fingerprint

Ultraviolet devices
Gate dielectrics
Thin film transistors
dynamic characteristics
Polymers
Transistors
transistors
polymers
Photons
thin films
Fabrication
Wavelength
fabrication
photons
wavelengths
poly(4-vinylphenol)

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

Lee, Kimoon ; Kim, Ki Tae ; Choi, Jeong M. ; Oh, Min Suk ; Hwang, D. K. ; Jang, Sungjin ; Kim, Eugene ; Im, Seongil. / Improved dynamic properties of ZnO-based photo-transistor with polymer gate dielectric by ultraviolet treatment. In: Journal of Physics D: Applied Physics. 2008 ; Vol. 41, No. 13.
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Improved dynamic properties of ZnO-based photo-transistor with polymer gate dielectric by ultraviolet treatment. / Lee, Kimoon; Kim, Ki Tae; Choi, Jeong M.; Oh, Min Suk; Hwang, D. K.; Jang, Sungjin; Kim, Eugene; Im, Seongil.

In: Journal of Physics D: Applied Physics, Vol. 41, No. 13, 135102, 07.07.2008.

Research output: Contribution to journalArticle

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