Host-sensitized phosphorescence of Mn4+, Eu3+, and Yb3+ in MgAl2Si2O8


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Circir E., Kalaycioglu N.

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, vol.110, no.3, pp.1179-1183, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 110 Issue: 3
  • Publication Date: 2012
  • Doi Number: 10.1007/s10973-011-2118-0
  • Title of Journal : JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
  • Page Numbers: pp.1179-1183
  • Keywords: Mn4+, Eu3+, Yb3+, MgAl2Si2O8 phosphors, Aluminosilicates, FLUORESCENCE, EU2+, LUMINESCENCE, SR, PHASES

Abstract

Mn4+ doped and Eu3+, Yb3+ co-doped MgAl2Si2O8-based phosphors were prepared by conventional solid state reaction at 1,300 A degrees C. They were characterized by thermogravimetry, differential thermal analysis, X-ray powder diffraction, photoluminescence, and scanning electron microscopy. The luminescence mechanism of the phosphors, which showed broad red emission bands in the range of 600-715 nm and had a different maximum intensity when activated by UV illumination, was discussed. Such a red emission can be attributed to the intrinsic (2) E -> (4) A (2) transitions of Mn4+.