Temperature-dependent segregation of Pr3+ impurity ions in Y2SiO5:Pr3+ and YPO4:Pr3+ nanocrystals

被引：0
|
作者：
N. V. Znamenskii
P. O. Maksimchuk
Yu. V. Malyukin
A. A. Masalov
V. V. Semin’ko
A. Yu. Shashkov
机构：
[1] Kurchatov Institute Russian Research Center,Institute of Scintillation Materials
[2] National Academy of Sciences of Ukraine,undefined
来源：
Journal of Experimental and Theoretical Physics | 2013年 / 116卷
关键词：
Activator Concentration; Luminescence Spectrum; Bulk Crystal; Optical Center; YPO4;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Stationary and time-resolved spectroscopic methods are used to show that the impurity ions in Y2SiO5:Pr3+ and YPO4:Pr3+ nanocrystals are distributed nonuniformly. This nonuniform distribution is found to be caused by the temperature-dependent segregation of Pr3+ ions near the surface of a nanocrystal. The motion of the activator ions from the bulk of a nanocrystal to the near-surface layer is traced when the activator concentration and the heat-treatment parameters are varied over wide ranges, and the main parameters of this effect (impurity redistribution intensity and time, diffusion coefficient) are estimated.
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页码：579 / 586
页数：7
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