Effects of Al- and Sn-substitution on photoluminescence properties of Mn4+-doped spinel-type Mg2TiO4 phosphor

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5 Citations (Scopus)

Abstract

Solid solution phosphors in which the octahedral sites Mg2TiO4:Mn4+ were substituted by Al3+ and Sn4+ were synthesized and the relationship between the coordination environment of Mn4+ and the emission wavelength was investigated. Mn4+-doped Mg2TiO4-MgAl2O4 and Mg2TiO4-Mg2SnO4 red phosphors were prepared by a solid-state reaction. Mg2-xTi1-xAl2xO4:Mn4+ and Mg2Ti1-ySnyO4:Mn4+ were synthesized at 1400 °C and 1200 °C, respectively. The crystal structure parameters were refined using the RIETAN-FP program and the average bond lengths were calculated from the refined crystal structures of Mg2-xTi1-xAl2xO4:Mn4+ and Mg2Ti1-ySnyO4:Mn4+. The emission peak of the Al-substituted sample shifted toward shorter wavelengths with increasing Al concentration, whereas the emission peak of the Sn-substituted sample shifted toward longer wavelengths with increasing Sn concentration. In the 2E→4A2 transition, the emission peak wavelength of the Mn4+-activated spinel-type solid solution increased almost linearly with increasing average bond length between cation and anion in octahedral sites, Loct. These results indicate that there is a strong positive correlation between Loct and the emission peak wavelength for the solid solution compositions studied in this work.

Original languageEnglish
Pages (from-to)540-545
Number of pages6
JournalJournal of Luminescence
Volume187
DOIs
Publication statusPublished - 2017 Jul 1

Keywords

  • Emission control
  • MgTiO
  • Mn
  • Photoluminescence
  • Red phosphor
  • Spinel-type

ASJC Scopus subject areas

  • Biophysics
  • Atomic and Molecular Physics, and Optics
  • Chemistry(all)
  • Biochemistry
  • Condensed Matter Physics

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