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

Fingerprint

Glass ceramics
Photoluminescence
ceramics
photoluminescence
Thin films
glass
silica glass
Fused silica
thin films
coating
oxyfluorides
Trifluoroacetic Acid
Dimethylformamide
Rayleigh scattering
alkoxides
Spin coating
Silicon
ultraviolet radiation
Sol-gel process
excitation

Keywords

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

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Porous SiO2-BaMgF4 : Eu(II) glass-ceramic thin films and their strong blue photoluminescence. / Kitta, Seiki; Fujihara, Shinobu; Kimura, Toshio.

In: Journal of Sol-Gel Science and Technology, Vol. 32, No. 1-3, 12.2004, p. 263-266.

Research output: Contribution to journalArticle

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