Synthesis and photoluminescence of Eu2+ doped Ca-α-SiAlON phosphor

被引：0
|
作者：
Wang Deliu [1 ]
Fu Renli [1 ]
He Hong [1 ]
Song Xiufeng [1 ]
Shen Yuan [1 ]
Xu Xin [2 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2008年 / 37卷 / 04期
关键词：
Ca-alpha-SiAlON; phosphor; white light emitting diode;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Luminescence conversion materials with the formula CaxEuySi12-(3 +4.5y)Al3x+4.5yOx+1.5yN16-(x+1.5y)(x= 0.220 similar to 1,525, y=0.02 similar to 0.15) have been synthesized from alpha-Si3N4, AIN, Eu2O3 and CaCO3 powders. Using X-ray Diffractometer (XRD), Scanning Electron Microscope (SEM), UV-Vis spectrophotometer and fluorescent spectrophotometer, the influences of different compositions and sintering process on Eu2+ distribution and optical properties of Ca-alpha-SiAlON:Eu2+ were studied. The powders with single Ca-alpha-SiAlON phase doped Eu2+ have been obtained within the range of composition we studied. Rising sintering temperature can improve the uniformity of Eu2+ dispersion in alpha-SiAlON lattice. Ca-alpha-SiAlON:Eu2+ had high adsorption in the UV-visible spectral region. Two broad bands were observed in the excitation spectrum centered at 270 and 400 nm, and a single broad emission band centered at 570 nm was observed in the emission spectrum. Ca-alpha-SiAlON:Eu2+ phosphors synthesized in the mixture of hydrogen and nitrogen atmosphere had stronger emission intensity than that synthesized in nitrogen atmosphere.
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页码：713 / 716
页数：4
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