Double perovskite (Gd0.85-xYx)2MgTiO6:0.3Eu3+ red phosphors for white LEDs with excellent high temperature performance

Xiaoyan Sun, Nan Ding, Wentao Huang, Haikui Zhu, Lixi Wang, Qitu Zhang

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The double perovskites of Gd2MgTiO6:0.3Eu3+ red phosphors doped by Y3+ in A-site with high temperature stability were successfully prepared by high temperature solid state reaction. X-ray diffraction and high-resolution transmission electron microscopy were utilized to discuss the rock-salt ordering structure of Gd2MgTiO6 double perovskite. The optical properties were analyzed by reflectance, excitation and emission spectra obtained by UV–Vis spectrophotometer and fluorescence spectrometer. When the Y3+ substitution amount is x = 0.4, the red-light intensity at 615 nm reached its maximum under the excitation of the near ultraviolet and blue light bands. As for thermal stability, the as-prepared phosphors could still maintain 81.98% of the luminous intensity at 473K, exhibiting excellent high temperature fluorescence properties. The A-site ion doped phosphors also display a longer fluorescence lifetime.

Original languageEnglish
Pages (from-to)20837-20843
Number of pages7
JournalCeramics International
Volume45
Issue number16
DOIs
StatePublished - Nov 2019

Keywords

  • Double perovskite
  • Fluorescence lifetime
  • Phosphors
  • Thermal stability

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