Effect of Mg 2+ and fluorine on the network and highly efficient photoluminescence of Eu 3+ ion in MgF 2 –BaO–B 2 O 3 glasses

Kenji Shinozaki, Sohei Sukenaga, Hiroyuki Shibata, Tomoko Akai

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The glass structure and photoluminescence of new oxyfluoride glasses with the composition of xMgF 2 –(66.7−2x/3)BaO–(33.3−x/3)B 2 O 3 (x = 10-50 mol%) were investigated in this work. The structure of the glasses was investigated by magic-angle spinning NMR, XAS, and Raman scattering spectroscopies. It was revealed that the glasses are mainly composed of BO 3 units with a disconnected borate network consisting mainly of ortho- and pyro-borate units, and ortho-borate increases with the addition of MgF 2 . The fluorine atoms are surrounded by Mg 2+ and Ba 2+ ions. The photoluminescence of Eu 3+ -doped samples were investigated. It was indicated that asymmetry of the Eu 3+ site increased with the addition of MgF 2 . The photoluminescence quantum yield (η) of the glasses are very high and increased with MgF 2 addition; red photoluminescence is observed with η = 82% for 10MgF 2 and η = 98% for 50MgF 2 for excitation at 393 nm.

Original languageEnglish
Pages (from-to)2531-2541
Number of pages11
JournalJournal of the American Ceramic Society
Volume102
Issue number5
DOIs
Publication statusPublished - 2019 May

Keywords

  • fluorine
  • glass
  • optical materials
  • photoluminescence
  • rare earth

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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