Luminescence and energy transfer in Ca3Sc2Si3O12:Ce3+,Mn2+ white LED phosphors

被引：86
|
作者：
Liu, Yongfu [1 ,2 ]
Zhang, Xia [1 ]
Hao, Zhendong [1 ]
Luo, Yongshi [1 ]
Wang, Xiaojun [3 ]
Ma, Li [3 ]
Zhang, Jiahua [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Key Lab Excited State Proc, Changchun 130033, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
[3] Georgia So Univ, Dept Phys, Statesboro, GA 30460 USA
来源：
JOURNAL OF LUMINESCENCE | 2013年 / 133卷
关键词：
Energy transfer; Ca3Sc2Si3O12; Ce3+-Mn2+; White LED phosphor; LIGHT-EMITTING-DIODES; MN2+-ACTIVATED PHOSPHORS; ELECTRONIC STATES;
D O I：
10.1016/j.jlumin.2011.12.052
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Expanded emission spectra ranging from green to red are reported in Ca3Sc2Si3O12 (CSS):Ce3+,Mn2+ silicate garnets. Mn2+ may occupy Ca2+ site (Mn2+(I)) to generate a yellow emission band at 574 nm or Sc3+ site (Mn2+(II)) with red emission band at 680 nm. Efficient energy transfers from the green emitting Ce3+ to both Mn2+(I) and Mn2+(II) occur upon blue excitation into Ce3+. Concentration dependence of Mn2+ emission is analyzed based on Ce3+-Mn2+ energy transfer, steady state rate equations, and fluorescence lifetimes. Energy transfer efficiency (eta(T)) and rate (W) are calculated with values as high as 45% and 14.01 x 10(6) s(-1), respectively. (c) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：21 / 24
页数：4
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