Solar-irradiation photodetectors based on ZnO nanoparticles with gold and indium electrodes

Yow Jon Lin, Yao Ming Chen, Hsing Cheng Chang, Ya Hui Chen

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The optoelectronic properties of the In/ZnO nanoparticles/In and Au/ZnO nanoparticles/Au devices under illumination by sunlight are determined. ZnO nanoparticles were prepared by the sol–gel method. It is shown that the value of photosensitivity for Au/ZnO nanoparticles/Au devices is larger than the value of photosensitivity for In/ZnO nanoparticles/In devices. This is because of the formation of the depletion region at the Au/ZnO interfaces. In order to understand the relationship between the visible-emission absorption and photosensitivity, sub-gap state generation is used to describe the mechanism for the sensitivity of ZnO nanoparticles to solar irradiation. A direct link between the sensitivity to solar irradiation, oxygen vacancies and the photo-response time is established.

Original languageEnglish
Pages (from-to)61-67
Number of pages7
JournalOptik
Volume142
DOIs
Publication statusPublished - 2017 Aug

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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