Photoluminescence of oxygen vacancies in nanostructured Al2O3

Anton I. Kostyukov, Aleksey V. Zhuzhgov, Vasily V. Kaichev, Alexander A. Rastorguev, Vladimir N. Snytnikov, Valeriy N. Snytnikov

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Oxygen vacancies represented by F and F2 centers were detected in faceted Al2O3 nanoparticles with the size less than 10 nm by a photoluminescence method. Al2O3 nanoparticles with such intrinsic defects were synthesized by evaporation of α-Al2O3 in flowing helium using a continuous wave CO2 laser. The XRD analysis showed that the crystal structure of Al2O3 nanoparticles is represented mostly by the low-temperature γ- and/or η-Al2O3 phases. The luminescence maxima of F and F2 centers in the Al2O3 nanoparticles were found to be 3.07 and 2.47 eV. These values are close to the luminescence maxima of F and F2 centers in bulk α-Al2O3.

Original languageEnglish
Pages (from-to)757-763
Number of pages7
JournalOptical Materials
Volume75
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • AlO nanoparticles
  • Laser evaporation
  • Oxygen vacancies
  • Photoluminescence
  • DEFECTS
  • ALUMINA SINGLE-CRYSTALS
  • OXIDE
  • OPTICAL-PROPERTIES
  • IONS
  • ALPHA-AL2O3
  • ANODIC ALUMINA
  • NANOPARTICLES
  • LUMINESCENCE
  • Al2O3 nanoparticles
  • ELECTRONIC EXCITATIONS

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