Luminescence properties of Y3Al5O12:Eu3+-coated submicron SiO2 particles

被引：11
作者：
Hreniak, D. [1 ]
Psuja, P. [1 ]
Strek, W. [1 ]
Hoelsae, J. [2 ]
机构：
[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50422 Wroclaw, Poland
[2] Univ Turku, Dept Chem, FI-20014 Turku, Finland
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2008年 / 354卷 / 2-9期
基金：
芬兰科学院;
关键词：
nanocomposites; nanoparticles; luminescence; silica; garnets; europium;
D O I：
10.1016/j.jnoncrysol.2007.06.093
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Silica submicron spherical particles coated with an yttrium aluminum garnet (Y3Al5O12, YAG) layer doped with Eu3+ were prepared by the sol-gel method. The structure and morphology of samples determined by the X-ray powder diffraction measurements and transmission electron microscope images, respectively, indicated that well-crystallized garnet nanocrystallites were formed with successive coating cycles. Similar trends were deduced from the evolution of the luminescence spectra. The ratio of integrated intensities of the D-5(0) --> F-7(2) and D-5(0) --> F-7(1) transitions was used to analyze the structural variations in the surroundings of the Eu3+ ion. The effect of coating was analyzed by comparing the luminescence properties of the Y3Al5O12:Eu3+ nanocrystalline powders and composite Y3Al5O12:Eu3+/SiO2 materials. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：445 / 450
页数：6
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