Synthesis of Y2O3:Eu phosphor with various particles morphologies by solvothermal reaction in methanol-water system

Kouichi Nakashima, Midori Saito, Valery Petrykin, Shu Yin, Tsugio Sato, Masato Kakihana

Research output: Contribution to journalArticle

Abstract

A methanolwater mixed solvent was used as a reaction medium for the synthesis of Eu3+-doped Y2O3 (Y 2O3:Eu) phosphor. Y2O3:Eu was prepared under solvothermal conditions at 150300° C for 324 h using a solution of water and methanol as the reaction medium followed by heat treatment at 1000°C for 2 h. The phase composition and optical properties of the products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence spectroscopy. The powders obtained were composed of plate-like particles, spindle-like particles, and whisker particles and were different for samples prepared under supercritical, subcritical, and normal conditions of methanol. With the reaction temperature increasing, the particle size became smaller, in particular, the particles were ̃500nm in size at 300°C under supercritical condition of methanol. After calcination at 1000°C for 2 h, the obtained powders retained the initial shape. The emission peaks of the fluorescence were assigned to the f-f transitions of the Eu3+ and exhibited red emission. The fluorescence intensities and internal quantum efficiency exhibited various values dependence on the morphology of the obtained particles.

Original languageEnglish
Pages (from-to)445-450
Number of pages6
JournalJournal of the Ceramic Society of Japan
Volume119
Issue number1390
DOIs
Publication statusPublished - 2011 Jun

Keywords

  • Methanol
  • Phosphor
  • Photoluminescence
  • Solvothermal method
  • Water

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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