Judd-Ofelt intensity parameters and spectral properties of Gd2O3 : Eu3+ nanocrystals

	Judd-Ofelt intensity parameters and spectral properties of Gd2O3 : Eu3+ nanocrystals
其他题名	论文其他题名
	Liu C. X.; Liu J. Y.; Dou K.
	2006
发表期刊	Journal of Physical Chemistry B
ISSN	1520-6106
卷号	110 期号:41 页码:20277-20281
摘要	Three nonequivalent centers of C-s (A, B, and C) in monoclinic phase and C-2 and S-6 centers in cubic phase were identified in the Gd2O3:Eu3+ nanocrystals with spectral techniques. Size dependence in the spectra indicated that the excitations from both host and charge-transfer band (CTB) for the D-5(0) -> F-7(2) transition of Eu3+ ions were nearly equal for a larger size of 135 nm of the cubic phase; however, with decreasing the size to or less than 23 nm, the excitations by the CTB dominated. The variation of excitation leading to the symmetry and energy change in the C-2 and S-6 sites was also observed for larger particle sizes. The Judd-Ofelt intensity parameters Omega(lambda) (lambda = 2, 4) for Gd2O3:Eu3+ nanoparticles were experimentally determined. The parameters Omega(lambda) were found to significantly change with the sizes of Gd2O3:Eu3+ from nanoparticles to bulk material. With decreasing the size from 135 to 15 nm, the quantum efficiencies for D-5(0) reduced from 23.6% to 4.6% due to the increasing ratio of surface to volume.
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/181722/26682
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Liu C. X.,Liu J. Y.,Dou K.. Judd-Ofelt intensity parameters and spectral properties of Gd2O3 : Eu3+ nanocrystals[J]. Journal of Physical Chemistry B,2006,110(41):20277-20281.
APA	Liu C. X.,Liu J. Y.,&Dou K..(2006).Judd-Ofelt intensity parameters and spectral properties of Gd2O3 : Eu3+ nanocrystals.Journal of Physical Chemistry B,110(41),20277-20281.
MLA	Liu C. X.,et al."Judd-Ofelt intensity parameters and spectral properties of Gd2O3 : Eu3+ nanocrystals".Journal of Physical Chemistry B 110.41(2006):20277-20281.

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