Porous SiO2-BaMgF4:Eu(II) glass-ceramic thin films and their strong blue photoluminescence

Seiki Kitta, Shinobu Fujihara, Toshio Kimura

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Oxyfluoride glass-ceramic thin films of nominal 90SiO2· 10(Ba1-x Eu x )MgF4 compositions were prepared by sol-gel method starting from mixtures of metal trifluoroacetates and silicon alkoxide precursor solutions. Films were deposited on silica glass substrates by spin-coating and heating at 750°C. Eu2+ ions were preferentially incorporated into BaMgF4 nanoparticles, which were dispersed in the silica glass matrix. The films exhibited broad-band blue photoluminescence (PL) in response to the ultraviolet light excitation. Addition of N,N-dimethylformamide to starting coating solutions resulted in a porous microstructure of the heat-treated films. Efficient UV excitation was promoted due to the Rayleigh scattering in the porous films; thereby the PL emissions could be strongly enhanced.

Original languageEnglish
Pages (from-to)263-266
Number of pages4
JournalJournal of Sol-Gel Science and Technology
Volume32
Issue number1-3
DOIs
Publication statusPublished - 2004 Dec 1

Keywords

  • Divalent europium
  • Fluorides
  • Glass-ceramics
  • Photoluminescence
  • Scattering

ASJC Scopus subject areas

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

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