Hydrothermal Method Synthesis and Characterization of YVO4:Eu3+@YPO4 Core-shell Phosphor

doi:10.3724/SP.J.1077.2012.11476

Abstract

Abstract: In order to improve the stability and luminous efficiency of YVO₄:Eu³⁺ phosphor, YVO₄:Eu³⁺@YPO4 nano core-shell phosphor was prepared by using hydrothermal method. X-ray diffraction (XRD), transmission electron microscope (TEM), and photoluminescence spectra were used to characterize the feature of YVO₄:Eu³⁺@YPO₄ core-shell phosphor. The XRD and TEM results indicate that the synthetic products are composed of the YVO4:Eu3+ core and YPO4 shell. The core-shell phosphor with diameter of 10–30 nm and shell thickness of 5–10 nm, regular crystalline morphologies, highly uniform in size and distribution, high degree of crystallinity. The photoluminescence spectra show that the luminous efficiency of YVO₄:Eu³⁺@YPO₄ core-shell phosphor is 66.75% higher than that of YVO₄:Eu³⁺ phosphor, which also has high color purity. Furthermore, the first principle calculation is used to calculate the band-structure of the YVO₄ and YPO₄ crystals. On base of the calculated result, the relationship between the electron transition and the luminance is illustrated.

Key words: phosphor, nano core-shell structure, hydrothermal synthesis

CLC Number:

O761

WU Ke, WANG Le, XU Guo-Tang, ZOU Shi-Bi, HUANG Jie, GU Pei-Fu, LIANG Pei. Hydrothermal Method Synthesis and Characterization of YVO₄:Eu³⁺@YPO₄ Core-shell Phosphor[J]. Journal of Inorganic Materials, 2012, 27(7): 706-710.

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Hydrothermal Method Synthesis and Characterization of YVO₄:Eu³⁺@YPO₄ Core-shell Phosphor

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