Ultraviolet photodetectors based on ZnO nanoparticles

Jin Hyung Jun, Hojun Seong, Kyoungah Cho, Byung-Moo Moon, Sangsig Kim

Research output: Contribution to journalArticle

118 Citations (Scopus)

Abstract

Ultraviolet (UV) photodetectors based on ZnO nanoparticles (NPs) were fabricated and their optoelectronic properties were examined. The dominant photoluminescence (PL) peak of the ZnO NPs was located at a wavelength of 380 nm under the illumination of 325-nm wavelength light. The direct bandgap transition of the charge carriers at λ = 380 nm contributed to the photocurrent. The ratio of the photocurrent to the dark current (on/off ratio) was as high as 106, which is favorable for photodetectors. The decay time constant in the photoresponse was relatively small, while the rise time constant was relatively large. The reasons for the high on/off ratio and photoresponse characteristics are discussed in this paper.

Original languageEnglish
Pages (from-to)2797-2801
Number of pages5
JournalCeramics International
Volume35
Issue number7
DOIs
Publication statusPublished - 2009 Sep 1

Fingerprint

Photodetectors
Photocurrents
Nanoparticles
Wavelength
Dark currents
Electron transitions
Charge carriers
Optoelectronic devices
Photoluminescence
Energy gap
Lighting

Keywords

  • C. Optoelectrical properties
  • D. ZnO
  • Nanoparticles
  • Photodetectors

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Ultraviolet photodetectors based on ZnO nanoparticles. / Jun, Jin Hyung; Seong, Hojun; Cho, Kyoungah; Moon, Byung-Moo; Kim, Sangsig.

In: Ceramics International, Vol. 35, No. 7, 01.09.2009, p. 2797-2801.

Research output: Contribution to journalArticle

Jun, Jin Hyung ; Seong, Hojun ; Cho, Kyoungah ; Moon, Byung-Moo ; Kim, Sangsig. / Ultraviolet photodetectors based on ZnO nanoparticles. In: Ceramics International. 2009 ; Vol. 35, No. 7. pp. 2797-2801.
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