Structural and optical characterizations of sol-gel based composites constituted of LiGdF4-Eu3+ nanocrystallites dispersed into a silica matrix

S. Lepoutre, D. Boyer, Shinobu Fujihara, R. Mahiou

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Abstract

The sol-gel process was utilized for preparing fluoride-oxide composites as powders constituted of undoped or Eu3+ doped LiGdF4 nanocrystallites which are embedded in a silica network. Crystallization of the fluoride phase occurs after 700 °C heat treatment under inert atmosphere (Ar) using trifluoroacetic acid as in-situ fluorine source. Formation of well-crystallized and submicronic LiGdF4 crystallites were evidenced by X-ray diffraction and transmission electron microscopy respectively. Besides emission spectra as well as decay times of Eu3+ recorded from SiO2-LiGdF4-Eu3+ samples are similar to those obtained from single LiGdF4-Eu3+ fluoride emphasizing the formation of well-dispersed and pure fluoride nanocrystallites with a selective incorporation of Eu3+ ions inside this latter.

Original languageEnglish
Pages (from-to)2784-2788
Number of pages5
JournalJournal of Materials Chemistry
Volume19
Issue number18
DOIs
Publication statusPublished - 2009

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ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)

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