Fluorescence properties and relaxation processes of Tb3+ ions in ZnCl2-based glasses

Noriyuki Wada, Masahiro Shibuta, Hiroko Shimazaki, Noriko Wada, Kazuhiro Yamamoto, Kazuo Kojima

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Abstract

60ZnCl2-20KCl-20BaCl2-xTbCl3 glasses (x = 0.10, 0.25, 0.50, 0.75, 1.00, and 1.25) were prepared by melt-quenching method, and Tb3+ fluorescence properties were investigated under 355 nm excitation. Regardless of x values, the electrons that were relaxed from the 5D3 to 5D4 level of Tb3+ ions by the multiphonon relaxation, were repressed to 28% of all the excited electrons because the ZnCl2-based glass had much lower phonon energy than oxide glasses. For 0 < × < 0.34, the cross relaxation, ( 5D35D4) → ( 7F07F6), was repressed, and consequently 72% and 28% of all the excited electrons were radiatively relaxed by the 5D37Fj(J = 6, 5, 4, 3, and 2) and 5D47Fj(J= 6, 5, 4, and 3) transitions, respectively. The lifetimes of the 5D3 and 5D4 initial levels were obtained to be 1.1 and 2.1 ms, respectively.

Original languageEnglish
Pages (from-to)4947-4952
Number of pages6
JournalMaterials Research Bulletin
Volume48
Issue number11
DOIs
Publication statusPublished - 2013 Nov
Externally publishedYes

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Keywords

  • A. Glasses
  • A. Halides
  • A. Optical materials
  • D. Luminescence
  • D. Optical properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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