Thermal degradation of BaAl2Si2O8:Eu2+ phosphor excited by near ultraviolet light

被引：0
作者：
MA MingXing 1
2 Research Center for Material Interdisciplinary Science
机构：
来源：
Science Bulletin | 2012年 / 14期
关键词：
thermal degradation; luminescence; aluminosilicate; phosphor;
D O I：
暂无
中图分类号：
O611.3 [性质];
学科分类号：
070301 ; 081704 ;
摘要：
Eu2+ doped BaAl2Si2O8 phosphor was synthesized by one-step calcination of precursors that were prepared by chemical co-precipitation.The thermal degradation properties of BaAl2Si2O8:Eu2+ were investigated by photoluminescence,lifetime and chromaticity coordinate measurements.BaAl2Si2O8:Eu2+ is efficiently excited by incident light of 250-400 nm,which matches the emission of near ultraviolet LED chips well.BaAl2Si2O8:Eu2+ exhibits broad blue emission at 470 nm because of the 4f65d1-4f7(8S7/2) transition of Eu2+ ions,and the emission band shows an unusual blue shift with bandwidth broadening and emission intensity decreasing as the annealing temperature is increased.The luminescence decay and CIE chromaticity coordinates of BaAl2Si2O8:Eu2+ were determined to investigate its application in white LEDs.
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收藏
页码：1728 / 1732
页数：5
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