Combustion synthesis and characterization of MV0.5P0.5O4: Sm3+ Tm3+ (M = Gd, La, Y)

Selepe J. Motloung*, Mantwa A. Lephoto, Kamohelo G. Tshabalala, Odireleng M. Ntwaeaborwa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this paper, GdV0.5P0.5O4: Sm3+, Tm3+, LaV0.5P0.5O4: Sm3+, Tm3+ and YV0.5P0.5O4: Sm3+, Tm3+ phosphor powders were prepared by solution combustion method using urea as a fuel. The phase purity, surface morphology, optical and photoluminescence properties were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–vis spectroscopy and photoluminescence spectroscopy. The XRD results indicated that the prepared powders are of a single phase and crystallized in tetragonal structure for Gd and Y systems while monoclinic phase was observed for La system. SEM showed that the samples consisted of mixed structures. The estimated band gaps were 2.2, 2.4 and 2.3 eV for Y, Gd and La systems respectively. The photoluminescence results showed four emission peaks. One peak is assigned to 1G43H6 transition of Tm3+, and three other emission peaks are attributed to 6G5/26H5/2, 6G5/26H7/2 and 6G5/26H9/2 transitions of Sm3+. The photoluminescent intensity was the highest in the gadolinium system.

Original languageEnglish
Pages (from-to)211-215
Number of pages5
JournalPhysica B: Condensed Matter
Volume535
DOIs
Publication statusPublished - 15 Apr 2018
Externally publishedYes

Keywords

  • Combustion synthesis
  • Oxyorthovanadates
  • Phosphors
  • Photoluminescence

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