Dependence of photoluminescent properties of cubic Y2O3 : Tb3+ nanocrystals on particle size and temperature

	Dependence of photoluminescent properties of cubic Y2O3 : Tb3+ nanocrystals on particle size and temperature
其他题名	论文其他题名
	Song H. W.; Wang J. W.
	2006
发表期刊	Journal of Luminescence
ISSN	0022-2313
卷号	118 期号:2 页码:220-226
摘要	Temperature-dependent spectral properties in the cubic Y2O3:Tb3+ nanocrystals (NCs, 10-70nm) under 488nm excitation were studied and compared to that in the bulk. In NCs, emission lines assigned to the 5D(4-)(7)F(J) (J = 1-6) transitions of Tb3+ ions and a broad band originated from oxygen defects were observed. As a function of temperature, two intensity maximums of the D-5(4)-Sigma(7)F(J) transitions appeared in the NCs, at similar to 250 and similar to 500 K, while in the bulk only one maximum appeared at similar to 250 K. The relative intensity of the maximum at similar to 500 K to that at similar to 250 K increased with decreasing particle size. The intensity maximum of the band emissions that came from the oxygen defects appeared in the range of 500-600 K. The appearance of intensity maximum as a function of temperature was attributed to the rivalry between thermal quenching process and phonon-assisted excitation. The appearance of two maxima in the NCs was attributed to the luminescence contributed by different Tb3+ centers, the internal and the surface. The emission for the surface Eu3+ centers has higher quenching temperature in contrast to that for the internal centers. (c) 2005 Elsevier B.V. All rights reserved.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/26697
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Song H. W.,Wang J. W.. Dependence of photoluminescent properties of cubic Y2O3 : Tb3+ nanocrystals on particle size and temperature[J]. Journal of Luminescence,2006,118(2):220-226.
APA	Song H. W.,&Wang J. W..(2006).Dependence of photoluminescent properties of cubic Y2O3 : Tb3+ nanocrystals on particle size and temperature.Journal of Luminescence,118(2),220-226.
MLA	Song H. W.,et al."Dependence of photoluminescent properties of cubic Y2O3 : Tb3+ nanocrystals on particle size and temperature".Journal of Luminescence 118.2(2006):220-226.

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