Luminescence of Ce3+ in lanthanum silicon oxynitride

被引：0

作者：

胡龙 ^{[1
]}

徐学文 ^{[1
]}

卢遵铭 ^{[1
]}

范英 ^{[1
]}

李养贤 ^{[1
]}

唐成春 ^{[1
]}

机构：

[1] School of Material Science and Engineering,Hebei University of Technology

来源：

Chinese Physics B | 2010年 / 19卷 / 12期

基金：

中国国家自然科学基金;

关键词：

photoluminescence; nitrides; oxides; chemical synthesis;

D O I：

暂无

中图分类号：

O482.31 [发光学];

学科分类号：

070205 ; 0805 ; 080502 ; 0809 ;

摘要：

The luminescence properties of lanthanum silicon oxynitride(La-Si-O-N) series doped by trivalent Ce ions have been investigated to seek for tunable wavelength-conversion phosphor for white light emitting diode applications.Four compound hosts of LaSiO2N,La4Si2O7N2,La5Si3O12 N,and La2Si6O3N8 were synthesized and examined in this work.Crystallographic examination for the equal amount of Ce 3+ substitution indicated that the covalency degree decreased in a sequence LaSiO2 N > La2Si6O3N8 > La4Si2O7N2 > La5Si3O12 N,not simply in correlation to the ratio of N3/O2.Excitation and emission spectrum measurements showed the main features of Ce3+ luminescence in the series:the centre of gravity of 5d bands depends on crystal-field splitting more strongly than that on covalency of Ce-N bonding;nephelauxetic effect could not be observed clearly for the investigated series;to some extent Stokes shift was dominated by crystal-field splitting rather than Ce-N covalency degree.

引用

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页码：548 / 552

页数：5

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