Visible green upconversion luminescence of Li+/Er3+/Yb3+ co-doped CaWO4 phosphor and effects of Yb3+ concentration

被引：2
作者：
Cho, Hyun [1 ]
Lee, Jung-Il [2 ]
Ryu, Jeong Ho [2 ]
机构：
[1] Pusan Natl Univ, Dept Nanomechatron & Engn, Miryang 627706, South Korea
[2] Korea Natl Univ Transportat, Dept Mat Sci & Engn, Chungju 380702, South Korea
来源：
JOURNAL OF THE KOREAN CRYSTAL GROWTH AND CRYSTAL TECHNOLOGY | 2013年 / 23卷 / 03期
关键词：
CaWO4 : Li+/Er3+/Yb3+; Upconversion; Luminescence;
D O I：
10.6111/JKCGCT.2013.23.3.142
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The upconversion (UC) luminescence of Li+/Er3+/Yb3+ co-doped CaWO4 phosphors and effects of Yb3+ concentration are investigated in detail. Single crystallized CaWO4 : Li+/Er3+/Yb3+ phosphor can be obtained, co-doped up to 35.0/5.0/30.0 mol% (Li+/Er3+/Yb3+) by solid-state reaction. Under 980 nm excitation, CaWO4 : Li+/Er3+/Yb3+ phosphor exhibited strong green UC emissions visible to the naked eye at 530 and 550 nm induced by the intra 4f transitions of Er3+ (H-4(11/2), S-4(3/2)-> I-4(15/2)). The optimum doping concentrations of Yb3+ that would result in the highest UC luminescence were determined, and a possible UC mechanism that depends on the pumping power is discussed in detail.
引用
收藏
页码：142 / 145
页数：4
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