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- Title
Synthesis and luminescence properties of Eu<sup>3+</sup>-doped a novel double perovskite Sr<sub>2</sub>YTaO<sub>6</sub> phosphor.
- Authors
Wei, Chao; Xu, Denghui; Li, Jinling; Geng, Aicong; Li, Xiong; Sun, Jiayue
- Abstract
A novel Sr2Y1−xTaO6:xEu3+ (x = 0.04-0.20) red-emitting phosphor was synthesized by using the conventional solid-state reaction method. The crystal structure, photoluminescence properties, thermal stability and decay lifetimes were investigated in detail. Upon near UV light excitation, this sample exhibited a strong red emission peak centered at 612 nm due to 5D0 → 7F2, which indicated that Eu3+ occupies low symmetry sites within the Sr2YTaO6 host lattice. The optimized doping concentration of Eu3+ ion is about 12 mol%. The excellent thermal stability of Sr2YTaO6:Eu3+ phosphor was tested according to the temperature dependent emission spectra. In addition, the Sr2Y1−xEuxTaO6 phosphors exhibited good color coordinate (0.6076, 0.3879) and high color purity about 84.55%. All results indicated that the Sr2Y1−xTaO6:xEu3+ phosphors can serve as an efficient red phosphor in the white light emitting diodes.
- Subjects
PHOSPHORS; LUMINESCENCE; PEROVSKITE; X-ray diffraction; LIGHT emitting diodes
- Publication
Journal of Materials Science: Materials in Electronics, 2019, Vol 30, Issue 3, p2864
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-018-0563-2