Dependence of photocurrent on UV wavelength in ZnO/Pt bottom-contact Schottky diode

Byoungho Lee, Changmin Kim, Youngmin Lee, Sejoon Lee, Deuk Young Kim

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We fabricated the bottom-contacted ZnO/Pt Schottky diode and investigated the dependence of its photocurrent on the wavelength of illuminated ultraviolet (UV) light source. The bottom-contacted Schottky diode was devised by growing (000l) ZnO on (111) Pt, and the fabricated device showed a strong dependence on the UV wavelength for its photo-response characteristics. When longer-wavelength-UV (e.g., UV-A) was illuminated on the device, the photo-current was increased by a factor of 200, compared to that under illumination of shorter-wavelength-UV (e.g., UV-C). The behavior is attributed to the wavelength-dependent UV penetration depth for ZnO.

Original languageEnglish
Pages (from-to)29-33
Number of pages5
JournalCurrent Applied Physics
Volume15
Issue number1
DOIs
StatePublished - Jan 2015

Keywords

  • Bottom-contact
  • Platinum
  • Schottky diode
  • UV response
  • Zinc oxide

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