Energy transfer and upconversion luminescence properties of Y2O3:Sm and Gd2O3:Sm phosphors

被引：96
|
作者：
Zhou, YH [1 ]
Lin, J [1 ]
Wang, SB [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Rare Earth Chem & Phys, Changchun 130022, Peoples R China
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2003年 / 171卷 / 1-2期
关键词：
yttrium oxide; gadolinium oxide; samarium; luminescence; energy transfer; upconversion;
D O I：
10.1016/S0022-4596(02)00219-0
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Y2O3:Sm and Gd2O3:Sm powder phosphors were prepared by carbonate coprecipitation method. The purified crystalline phases of Y2O3:Sm and Gd2O3:SM were obtained at 600degreesC, and the crystallinity increases with increase in annealing temperature. Both samples contain aggregated phosphor particles. An energy transfer (ET) from Y2O3 and Gd2O3 hosts to sm(3+) has been observed, and the ET efficiency in the latter is higher than that in the former because an energy migration process like Gd3+-(Gd3+)(n)-Sm3+ has occurred in the latter. Furthermore, an upconversion luminescence from the (4)G(5/2) level of Sm3+ has been observed in both Y2O3 and Gd2O3 under the excitation of 936 nm infrared, whose mechanisms are proposed. Both the up and downconversion emission intensities of Sm3+ in Gd2O3 are stronger than those in Y2O3. (C) 2003 Elsevier Science (USA). All rights reserved.
引用
收藏
页码：391 / 395
页数：5
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