Novel red-emitting phosphors, (Mg(1-x-y)MnxDyy)Al2Si2O8 and (Mg(1-x-y)MnxTmy)Al2Si2O8


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Ozturk E., Ozpozan N., DAYAN S.

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, vol.117, no.2, pp.573-578, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 117 Issue: 2
  • Publication Date: 2014
  • Doi Number: 10.1007/s10973-014-3791-6
  • Journal Name: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.573-578
  • Keywords: Inorganic compounds, Luminescence, Thermogravimetry (TG), X-ray diffraction, Electron microscopy, HOST-SENSITIZED PHOSPHORESCENCE, EU2+, FLUORESCENCE, MN4+, SR, PHASES
  • Erciyes University Affiliated: Yes

Abstract

Mn4+ doped and Dy3+, Tm3+ 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 E-2 -> (4)A(2) transitions of Mn4+.