Sol-gel processing and luminescent properties of rare-earth oxyfluoride materials

Shinobu Fujihara, Takayoshi Kato, Toshio Kimura

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34 Citations (Scopus)

Abstract

Luminescent rare-earth oxyfluoride materials were prepared by a sol-gel method using trifluoroacetic acid as a fluorine source. Crystalline (La, Eu)OF powders and thin films were obtained by heating gels at typically 600-800°C. Transparent SiO2-LaOF glass-ceramic thin films were also prepared by mixing the trifluoroacetate sols and silica sols, spin-coating on silica glass substrates and heating at temperatures 600-900°C. Eu3+ ions doped in the oxyfluoride materials exhibited a strong red 5D07F2 emission (611 nm) by a charge-transfer (O2--Eu3+) excitation with ultra-violet radiation (265 nm). It was strongly suggested that the Eu3+ activators were preferentially incorporated into the crystalline LaOF phase in the SiO2-LaOF glass-ceramics.

Original languageEnglish
Pages (from-to)953-956
Number of pages4
JournalJournal of Sol-Gel Science and Technology
Volume26
Issue number1-3
DOIs
Publication statusPublished - 2003 Jan 1

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Keywords

  • Glass-ceramics
  • LaOF
  • Oxyfluorides
  • Photoluminescence
  • Sol-gel

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

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