Luminescent mechanism of Y2SiO5:Ce phosphor powder

被引：31
|
作者：
Coetsee, E. [1 ]
Terblans, J. J. [1 ]
Ntwaeaborwa, O. M. [1 ]
Swart, H. C. [1 ]
机构：
[1] Univ Orange Free State, Dept Phys, ZA-9300 Bloemfontein, South Africa
来源：
PHYSICA B-CONDENSED MATTER | 2009年 / 404卷 / 22期
基金：
新加坡国家研究基金会;
关键词：
Y2SiO5:Ce; CL; PL and Gaussian peak fitting; DEGRADATION; CE3+;
D O I：
10.1016/j.physb.2009.09.015
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A luminescent mechanism was constructed for the broad band emission spectra of the X-1 phase of the Y2SiO5:Ce phosphor powder. Four Gaussian peaks fit to the cathodoluminescent (CL) and photoluminescent (PL) spectra were attributed to the two different sites (A1 and A2) of the Ce3+ ion in the host matrix and the difference in orientation of the neighbour ions in the complex crystal structure. Each Ce3+ site gives rise to transitions from the 5d to the two (therefore two peaks) 4f energy levels (F-2(5/2) and F-2(7/2) due to crystal field splitting). Energy transfer from other defect levels in the matrix was also observed. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：4426 / 4430
页数：5
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