Synthesis, Structure and Photoluminescent Properties of Ca1.8Li0.6La0.6-x(PO4)2∶xEu3+Phosphor with Whitlockite Structure

Abstract

Abstract: Whitlockite is an excellent luminescent material. It has lower synthesis temperature and an abundance of adjustable crystal lattice.Ca_1.8Li_0.6La_0.6-x(PO₄)₂∶xEu³⁺ (x=0,0.01,0.03,0.06,0.09,0.15) was synthesized by high temperature solid state reaction at 1 250 ℃, and its structure and luminescent properties were characterized by X-ray powder diffraction (XRD) and fluorescence spectrometer. The results show that the phosphors belongs to whitlockite structure, and the doping of Eu³⁺ does not change the structure to a great extent. The phosphor in the system emits red light, and the characteristic emission of Eu³⁺ appears in the emission spectrum. The strongest emission peak locates at 617 nm and comes from ⁵D₀→⁷F₂ transition of Eu³⁺. As the concentration of Eu³⁺ increases, the fluorescence lifetime decreases, which proves the existence of energy transfer between Eu³⁺.

Key words: whitlockite, high temperature solid state method, photoluminescent property, phosphate luminescence material, red light, Eu³⁺ doping

CLC Number:

TQ422

TANG Wanjuan, GUO Qingfeng, SU Ke, MEI Lefu, LIAO Libing. Synthesis, Structure and Photoluminescent Properties of Ca_1.8Li_0.6La_0.6-x(PO₄)₂∶xEu³⁺Phosphor with Whitlockite Structure[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(11): 2081-2085.

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Synthesis, Structure and Photoluminescent Properties of Ca_1.8Li_0.6La_0.6-x(PO₄)₂∶xEu³⁺Phosphor with Whitlockite Structure

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