Upconversion luminescence dynamics in Er3+/Yb3+ codoped nanocrystalline yttria

	Upconversion luminescence dynamics in Er3+/Yb3+ codoped nanocrystalline yttria
其他题名	论文其他题名
	Song H. W.; Xia H. P.; Sun B. J.; Lu S. Z.; Liu Z. X.; Yu L. X.
	2006
发表期刊	Chinese Physics Letters
ISSN	0256-307X
卷号	23 期号:2 页码:474-477
摘要	The upconversion luminescence and dynamics in Er3+/Yb3+ codoped nanocrystalline yttria (7-65 nm) are studied under 980-nm pulsed laser excitation. It is found that the red emission of F-4(9/2)-I-4(15/2) and the green emission of H-2(11/2)/S-4(3/2) in nanoparticles with lower concentration of Yb3+ result from a two-photon excitation. In nanocrystals with higher Yb3+ concentration, the red emissions from a two-photon excitation, while the green emissions from a three-photon excitation. The luminescence dynamics indicates that as the particle size decreases, both the rise and the decay time constants become shorter. As the size decreases to several nanometres, the rise process nearly disappears, suggesting that the upconversion luminescence originates mainly from self-excitation of Er3+, instead of the energy transfer of Yb3+ -> Er3+.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/24931
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.,Xia H. P.,Sun B. J.,et al. Upconversion luminescence dynamics in Er3+/Yb3+ codoped nanocrystalline yttria[J]. Chinese Physics Letters,2006,23(2):474-477.
APA	Song H. W.,Xia H. P.,Sun B. J.,Lu S. Z.,Liu Z. X.,&Yu L. X..(2006).Upconversion luminescence dynamics in Er3+/Yb3+ codoped nanocrystalline yttria.Chinese Physics Letters,23(2),474-477.
MLA	Song H. W.,et al."Upconversion luminescence dynamics in Er3+/Yb3+ codoped nanocrystalline yttria".Chinese Physics Letters 23.2(2006):474-477.

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