Tunable UV- and Visible-Light Photoresponse Based on p-ZnO Nanostructures/n-ZnO/Glass Peppered with Au Nanoparticles

Cheng Liang Hsu, Yu Hong Lin, Liang Kai Wang, Ting Jen Hsueh, Sheng Po Chang, Shoou Jinn Chang

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

UV- and visible-light photoresponse was achieved via p-type K-doped ZnO nanowires and nanosheets that were hydrothermally synthesized on an n-ZnO/glass substrate and peppered with Au nanoparticles. The K content of the p-ZnO nanostructures was 0.36 atom %. The UV- and visible-light photoresponse of the p-ZnO nanostructures/n-ZnO sample was roughly 2 times higher than that of the ZnO nanowires. The Au nanoparticles of various densities and diameter sizes were deposited on the p-ZnO nanostructures/n-ZnO samples by a simple UV photochemical reaction method yielding a tunable and enhanced UV- and visible-light photoresponse. The maximum UV and visible photoresponse of the Au nanoparticle sample was obtained when the diameter size of the Au nanoparticle was approximately 5-35 nm. On the basis of the localized surface plasmon resonance effect, the UV, blue, and green photocurrent/dark current ratios of Au nanoparticle/p-ZnO nanostructures/n-ZnO are ∼1165, ∼94.6, and ∼9.7, respectively.

Original languageEnglish
Pages (from-to)14935-14944
Number of pages10
JournalACS Applied Materials and Interfaces
Volume9
Issue number17
DOIs
Publication statusPublished - 2017 May 3

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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