Materials, Photonic Devices, and Sensors

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

[+] Author Affiliations
Zaifa Yang, Yumei Sun, Liu Han, Denghui Xu, Jiayue Sun

Beijing Technology and Business University, School of Science, No. 33, Fucheng Road, Haidian District, Beijing 100048, China

Opt. Eng. 55(4), 047105 (Apr 12, 2016). doi:10.1117/1.OE.55.4.047105
History: Received December 22, 2015; Accepted March 16, 2016
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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 D50F72 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).

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Zaifa Yang ; Yumei Sun ; Liu Han ; Denghui Xu and Jiayue Sun
"Hydrothermal synthesis and luminescence properties of KLa(MoO4)2:Eu3+ phosphor", Opt. Eng. 55(4), 047105 (Apr 12, 2016). ; http://dx.doi.org/10.1117/1.OE.55.4.047105


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