Characterization of ZnGa2O4:Mn2+ nanophosphor synthesized by the solvothermal method in 1,4-butanediol-water system

Masahiro Takesada, Morio Osada, Tetsuhiko Isobe

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26 Citations (Scopus)

Abstract

We characterized ZnGa2O4:Mn2+ (ZnGa2O4-zinc gallate) nanophosphor synthesized by the solvothermal method in 1,4-butanediol-containing water to increase the amount of Mn2+ ions incorporated in the ZnGa2O4 matrix without post-heat treatment. We investigated the influence of water content in the solvent on the photoluminescence (PL) intensity and the Mn amount, the latter being measured by X-ray fluorescence analysis and electron paramagnetic resonance spectroscopy. The PL intensity per Mn amount reached the maximum at the 50 wt% water content. The addition of water promotes repeated dissolution and precipitation, resulting in homogeneous Mn2+ distribution in the ZnGa2O4 matrix. This suggests that the solvothermal method in the 1,4-butanediol-water system is useful for increasing the amount of Mn2+ ions incorporated in the ZnGa2O4 matrix without post-heat treatment. At the water content >50 wt%, the decrease in PL intensity is attributed to the optical absorption of the by-product, MnOOH.

Original languageEnglish
Pages (from-to)281-285
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume70
Issue number2
DOIs
Publication statusPublished - 2009 Feb 1

Keywords

  • A. Nanostructures
  • B. Chemical synthesis
  • D. Electron paramagnetic resonance (EPR)
  • D. Luminescence

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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