Alkali earth sulfide phosphors doped with Eu2+ and Ce3+ for LEDs

被引：104
|
作者：
Jia, Dongdong
Wang, Xiao-jun [1 ]
机构：
[1] Georgia So Univ, Dept Phys, Statesboro, GA 30460 USA
[2] Lock Haven Univ Penn, Dept Geol & Phys, Lock Haven, PA 17745 USA
[3] Chinese Acad Sci, CIOMP, Key Lab Excited Proc, Changchun 130033, Peoples R China
来源：
OPTICAL MATERIALS | 2007年 / 30卷 / 03期
基金：
中国国家自然科学基金;
关键词：
phosphor; energy transfer; luminescence; LED;
D O I：
10.1016/j.optmat.2006.11.061
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
CaS:Eu2+, SrS:EU2+, CaS:Ce3+, SrS:Ce3+, CaS:EU2+, Ce3+ and SrS:EU2+, Ce3+ phosphor samples have been prepared using a solid state chemical reaction method. Emission and excitation spectra of the samples are investigated. SrS:Ce3+, CaS:Ce3+, Si-S:Eu-2 divided by and CaS:Eu2+ emit greenish blue (482 nm), green (515 nm), orange (606 nm), and red (648 nm) light, respectively. For the co-doped samples, SrS:Eu2+, Ce3+ and CaS:EU2+, Ce3+, energy transfer from Ce3+ to EU2+ is observed. Ce3+ emission has been totally quenched because of the energy transfer. Eu2+ emissions are estimated to be enhanced by 28% and 18% in SrS and CaS hosts, respectively, at the present doping concentration. The samples are also excited by blue light emitting diodes (450 nm) to exam them as potential coating phosphors for the diodes. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：375 / 379
页数：5
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