Low-temperature wet chemical precipitation of YVO4:Bi 3+,Eu3+ nanophosphors via citrate precursors

Satoru Takeshita, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji Niikura

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

YVO4:Bi3+,Eu3+ nanophosphors are prepared by low-temperature wet chemical precipitations in the presence of citrate ions. Transparently dispersed YVO4:Bi3+,Eu3+ nanophosphors crystallize from amorphous gel precursors through a gel-sol process. The homogeneity of Bi3+ doping process as well as the photoluminescence property are improved by using the homogeneous Bi3+ solution as a Bi3+ source instead of Bi3+ powder. YVO4:Bi3+,Eu3+ nanophosphor under the irradiation of near-UV light shows peculiar photobleaching behavior through the reduction from V5+ to V4+, but this photobleach is suppressed by subsequent hydrothermal treatment. The authors also discuss the advantage of transparency of YVO4:Bi3+,Eu3+ nanophosphor in terms of wavelength conversion as compared to micron-sized phosphor.

Original languageEnglish
Pages (from-to)127-136
Number of pages10
JournalProgress in Crystal Growth and Characterization of Materials
Volume57
Issue number4
DOIs
Publication statusPublished - 2011 Dec 1

Keywords

  • Gel-sol synthesis
  • Luminescence
  • Nanophosphor
  • Photostability
  • Wavelength conversion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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