Hydrothermal synthesis and luminescence properties of KLa(MoO4)2:Eu3+ phosphor

Zaifa Yang; Yumei Sun; Liu Han; Denghui Xu; Jiayue Sun

doi:10.1117/1.OE.55.4.047105

12 April 2016 Hydrothermal synthesis and luminescence properties of KLa(MoO4)2:Eu3+ phosphor

Zaifa Yang, Yumei Sun, Liu Han, Denghui Xu, Jiayue Sun

Author Affiliations +

Funded by: National Natural Science Foundation of China, National Natural Science Foundation, Beijing Natural Science Foundation

Optical Engineering, Vol. 55, Issue 4, 047105 (April 2016). https://doi.org/10.1117/1.OE.55.4.047105

Abstract

KLa (MoO₄)₂: Eu³+ phosphors were prepared by the hydrothermal method. The after tuning of synthesis time and the ratio of the ethylene glycol to water ratio made the phosphor present different morphologies, including peanut-like shape and spheres. The samples were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM), diffuse reflectance spectrum, and fluorescence spectrum. Under the excitation of 397 nm near-ultraviolet, the typical red emission produced by Eu³+ ions can be observed. And the phosphors show strong red light around 612 nm, attributed to ⁵D₀ → ⁷F₂ transition of Eu³+ ion. The luminescence properties of the as-prepared phosphors were studied based on changing the synthesis condition. It is found that the synthesis time and the changing of the ratio of ethylene glycol to water play the crucial role in the formation of morphology. The optimum dopant concentration of Eu³+ ions in KLa (MoO₄)₂ : Eu³+ is around 7 mol. %. Moreover, the fluorescence decay curve and thermal stability of luminescence were also investigated in detail. The Commission International de I’Eclairage coordinates of KLa (MoO₄)₂ : 0.07Eu³+ located in the red reddish region. All the results suggest that KLa (MoO₄)₂ : 0.07Eu³+ might be a promising reddish-orange emitting phosphor used in white light-emitting diodes (w-LED).

Citation Download Citation

Zaifa Yang, Yumei Sun, Liu Han, Denghui Xu, and Jiayue Sun "Hydrothermal synthesis and luminescence properties of KLa(MoO4)2:Eu3+ phosphor," Optical Engineering 55(4), 047105 (12 April 2016). https://doi.org/10.1117/1.OE.55.4.047105

Published: 12 April 2016

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