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Optical Engineering

Hydrothermal synthesis and luminescence properties of KLa(MoO4)2:Eu3+ phosphor
Author(s): Zaifa Yang; Yumei Sun; Liu Han; Denghui Xu; Jiayue Sun
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Paper 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).

Paper Details

Date Published: 12 April 2016
PDF: 7 pages
Opt. Eng. 55(4) 047105 doi: 10.1117/1.OE.55.4.047105
Published in: Optical Engineering Volume 55, Issue 4
Show Author Affiliations
Zaifa Yang, Beijing Technology and Business Univ. (China)
Yumei Sun, Beijing Technology and Business Univ. (China)
Liu Han, Beijing Technology and Business Univ. (China)
Denghui Xu, Beijing Technology and Business Univ. (China)
Jiayue Sun, Beijing Technology and Business Univ. (China)

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