Synthesis and luminescence properties of α-NaYF4:Eu3+ red phosphors under different annealing temperature

被引：0
作者：
School of Materials Science and Engineering, Nanchang University, Nanchang [1 ]
330031, China
不详 [2 ]
330099, China
机构：
[1] School of Materials Science and Engineering, Nanchang University, Nanchang
[2] School of Science, Nanchang Institute of Technology, Nanchang
来源：
Faguang Xuebao | / 5卷 / 502-507期
关键词：
Annealing; Luminescence; Solvothermal method; α-NaYF[!sub]4[!/sub] nanocrystal;
D O I：
10.3788/fgxb20153605.0502
中图分类号：
学科分类号：
摘要：
α-NaYF4:5%Eu3+ red phosphors were prepared by the solvothermal method. The crystal structure, morphology, luminescence properties and the chromaticity coordinates(CIE) were discussed under different annealing temperature, and three samples of them were coated with SiO2 before annealed in air. It is found that the forbidden 5D0→7F0 transition emerges after annealing treatment, and all the characteristic emission peaks of Eu3+ are enhanced with the increasing of annealing temperature, correspondingly the CIE turns to red. But the nanoparticles reunite each other under high annealing temperature, and the tendency of CIE turning to red is slower. Based on the results of asymmetric ratio σ, we consider the appearance of 5D0→7F0 transition is from Eu3+ deviating from the inversion symmetry center. ©, 2015, Chines Academy of Sciences. All right reserved.
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页码：502 / 507
页数：5
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