Improved photoluminescence of green-emitting phosphor Ca3Sc2Si3O12:Ce3+ for white light emitting diodes

被引：10
作者：
Liu Yuanhong
Zhuang Weidong [1 ]
Hu Yunsheng
Gao Wengui
机构：
[1] Gen Res Inst NonFerrous Met, Natl Engn Res Ctr Rare Earth Mat, Beijing 100088, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2010年 / 28卷 / 02期
关键词：
luminescence; white LED; green-emitting phosphors; garnet structure; rare earths; LUMINESCENCE; CRYSTAL;
D O I：
10.1016/S1002-0721(09)60076-4
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Ca3Sc2Si3O12:Ce3+ phosphors with single-phase were successfully synthesized by a gel-combustion method. Annealing atmosphere greatly affected the luminescent properties of the phosphor. The intensity of absorption band at 450 am was greatly increased with a reducing atmosphere, which was very suitable as a color converter in white LED. The absorption at 243 and 311 nm was gradually enhanced with a stronger reducing atmosphere and a new absorption peak at 362 nm appeared in N-2+H-2 mixing gas. The emission intensity also increased when using reducing atmosphere. Meanwhile, the emission peaks slightly moved to the longer wavelength in reducing atmosphere. A white LED with higher color rending index and lower color temperature was obtained by putting our improved product Ca3Sc2Si3O12:Ce3+ green phosphor and Sr2Si5N8:Eu red phosphor onto a blue LED.
引用
收藏
页码：181 / 184
页数：4
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