Synthesis and luminescence properties of Eu3+-doped a novel double perovskite Sr2YTaO6 phosphor

• Published in: Journal of materials science. Materials in electronics 2019-02, Vol.30 (3), p.2864-2871
• Main Authors: Wei, Chao, Xu, Denghui, Li, Jinling, Geng, Aicong, Li, Xiong, Sun, Jiayue
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Color; Crystal structure; Efficiency; Emission analysis; Emission spectra; Europium; Luminescence; Materials Science; Morphology; Optical and Electronic Materials; Optical properties; Organic light emitting diodes; Perovskites; Phosphors; Photoluminescence; Radiation; Spectrum analysis; Temperature dependence; Thermal stability; Ultraviolet radiation; White light
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-018-0563-2

A novel Sr 2 Y 1− x TaO 6 : x Eu 3+ ( 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 5 D 0  →  7 F 2 , which indicated that Eu 3+ occupies low symmetry sites within the Sr 2 YTaO 6 host lattice. The optimized doping concentration of Eu 3+ ion is about 12 mol%. The excellent thermal stability of Sr 2 YTaO 6 :Eu 3+ phosphor was tested according to the temperature dependent emission spectra. In addition, the Sr 2 Y 1− x Eu x TaO 6 phosphors exhibited good color coordinate (0.6076, 0.3879) and high color purity about 84.55%. All results indicated that the Sr 2 Y 1− x TaO 6 : x Eu 3+ phosphors can serve as an efficient red phosphor in the white light emitting diodes.