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 language | English |
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Pages (from-to) | 20837-20843 |
Number of pages | 7 |
Journal | Ceramics International |
Volume | 45 |
Issue number | 16 |
DOIs | |
State | Published - Nov 2019 |
Keywords
- Double perovskite
- Fluorescence lifetime
- Phosphors
- Thermal stability