Luminescence properties of NaY(MoO4)2: Eu3+ for near-UV based white LEDs

被引：0
作者：
College of Science, Faculty of Science and Engineering, Communication University of China, Beijing, China [1 ]
机构：
[1] College of Science, Faculty of Science and Engineering, Communication University of China, Beijing
来源：
Guangdianzi Jiguang | / 10卷 / 1942-1946期
关键词：
Eu[!sup]3+[!/sup; Luminescence; NaY(MoO[!sub]4[!/sub])[!sub]2[!/sub;
D O I：
10.16136/j.joel.2015.10.0457
中图分类号：
学科分类号：
摘要：
A series of single Eu3+ activated NaY(MoO4)2 were synthesized by a solid state reaction at 550 ℃ for 4 h, and their luminescent properties are investigated. Phase formation is determined by X-ray diffraction (XRD) in a Bruker AXS D8 advanced automatic diffractometer (Bruker Co., German) with Ni-filtered Cu Kα1 radiation (λ=0.154 nm). Steady time resolved luminescence spectra, and excitation and emission spectra are detected by a fluorescence spectrophotometer (Hitachi F-4600). Commission International de I'Eclairage (CIE) chromaticity coordinates of samples are measured by a PMS-80 spectra analysis system. The X-ray powder diffraction results show that there has no crystalline phase other than NaY(MoO4)2. NaY(MoO4)2: Eu3+ can create red emission under the 393 nm excitation, and the prominent luminescence in red (616 nm) is due to the 5D0-7F2 transition of Eu3+. The emission intensities of Eu3+ in NaY(MoO4)2 enhance with the increase of the impurity concentration, there is no concentration quenching effect, and the phenomena are proved by the decay curves of Eu3+. Moreover, when tuning the Eu3+ doping content, the CIE chromaticity coordinates of NaY(MoO4)2: Eu3+ are measured, and the corresponding results present that they locate in the red region. The results indicate that the phosphors may have the potential applications in white light emitting diodes. ©, 2015, Board of Optronics Lasers. All right reserved.
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页码：1942 / 1946
页数：4
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