Visible photoluminescence of ZnO nanoparticles dispersed in highly transparent MgF2 thin-films via sol-gel process

Shinobu Fujihara, Hiroki Naito, Toshio Kimura

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

ZnO/MgF2 nanocomposite thin films, where ZnO nanoparticles were dispersed in an MgF2 matrix, were prepared by a sol-gel method using metal acetates, isopropanol, trifluoroacetic acid, monoethanolamine and water as starting materials. The particle size of ZnO was approximately 6.2 nm, showing quantum size effects in the absorption edge measurement. Green photoluminescent (PL) emission from the films was observed at room temperature. The emission intensity was found to be greatly dependent on heat-treatment temperature and time. By optimizing the heating conditions, the film with high transparency and high PL intensity was obtained. Influence of the heating conditions on the formation of the ZnO nanoparticles and the green emission was discussed.

Original languageEnglish
Pages (from-to)227-232
Number of pages6
JournalThin Solid Films
Volume389
Issue number1-2
DOIs
Publication statusPublished - 2001 Jun 15

Keywords

  • Coatings
  • Fluorides
  • Luminescence
  • Nanostructures
  • Zinc oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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