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Ca取代Sr对Sr3Al0.6Si0.4O4.4F0.6：Ce3+荧光粉的发光性能影响
Influence of Ca for Sr Substitution on Luminescence Properties of Sr3Al0.6Si0.4O4.4F0.6 ：Ce3+ Phosphors
- 发光学报 2014年35卷第5期 页码：519-525
- 作者机构：
1. 北京有色金属研究总院稀土材料国家工程研究中心 有研稀土新材料股份有限公司 北京,100088
2. 北京科技大学 冶金工程与生态学院 北京,100083
- 作者简介：
- 基金信息：国家自然基金（51102021，51302016）();国家();973();计划（2014CB643801）资助项目()
DOI：10.3788/fgxb20143505.0519
中图分类号： O482.31收稿日期：2013-12-31，
修回日期：2014-01-23，
网络出版日期：2014-02-16，
纸质出版日期：2014-05-03
- 稿件说明：
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马小乐, 庄卫东, 郭汉杰等. Ca取代Sr对Sr<sub>3</sub>Al<sub>0.6</sub>Si<sub>0.4</sub>O<sub>4.4</sub>F<sub>0.6</sub>：Ce<sup>3+</sup>荧光粉的发光性能影响[J]. 发光学报, 2014,35(5): 519-525
MA Xiao-le, ZHUANG Wei-dong, GUO Han-jie etc. Influence of Ca for Sr Substitution on Luminescence Properties of Sr<sub>3</sub>Al<sub>0.6</sub>Si<sub>0.4</sub>O<sub>4.4</sub>F<sub>0.6</sub> ：Ce<sup>3+</sup> Phosphors[J]. Chinese Journal of Luminescence, 2014,35(5): 519-525
马小乐, 庄卫东, 郭汉杰等. Ca取代Sr对Sr<sub>3</sub>Al<sub>0.6</sub>Si<sub>0.4</sub>O<sub>4.4</sub>F<sub>0.6</sub>：Ce<sup>3+</sup>荧光粉的发光性能影响[J]. 发光学报, 2014,35(5): 519-525 DOI： 10.3788/fgxb20143505.0519.
MA Xiao-le, ZHUANG Wei-dong, GUO Han-jie etc. Influence of Ca for Sr Substitution on Luminescence Properties of Sr<sub>3</sub>Al<sub>0.6</sub>Si<sub>0.4</sub>O<sub>4.4</sub>F<sub>0.6</sub> ：Ce<sup>3+</sup> Phosphors[J]. Chinese Journal of Luminescence, 2014,35(5): 519-525 DOI： 10.3788/fgxb20143505.0519.
摘要
采用高温固相法合成Ca取代Sr
3
Al
0.6
Si
0.4
O
4.4
F
0.6
：Ce
3+
中Sr的 Sr
3-
x
Ca
x
Al
0.6
Si
0.4
O
4.4
F
0.6
：Ce
3+
荧光粉。由于Sr
3
Al
0.6
Si
0.4
O
4.4
F
0.6
：Ce
3+
中Sr具有十配位Sr（1）和八配位Sr（2），所以激活剂离子Ce
3+
也具有两个不同的占位。结合Ce
3+
的光谱结果和Van Uitert经验公式，分别研究了十配位Ce（1）
3+
和八配位Ce（2）
3+
的猝灭浓度和荧光寿命，指出是由于Ca的掺入减小了Ce（1）
3+
发光中心，增加了Ce（2）
3+
发光中心，从而出现随着Ca/Sr比增加，样品在400 nm激发下发光强度减小，而在460 nm激发下发光强度增大的现象。同时，Ca的掺入增强了粉体发光的热稳定性。调节Ca含量可以使粉体实现从绿黄色到黄色的发光，表明Sr
3-
x
Ca
x
Al
0.6
Si
0.4
-O
4.4
F
0.6
：Ce
3+
荧光粉是一款潜在的适合近紫外和蓝光激发的白光LED用荧光粉。
Abstract
The structure and luminescence properties of Sr
3-
x
Ca
x
Al
0.6
Si
0.4
O
4.4
F
0.6
(SCASOF) doped with Ce
3+
are studied as a function of the Ca/Sr ratio. First-principle calculations conform that Ca preferentially occupies 8
h
sites in the host structure. With the increasing of Ca/Sr ratio
the excitation and emission spectra of Sr
3-
x
Ca
x
Al
0.6
Si
0.4
O
4.4
F
0.6
:Ce
3+
phosphors show an obvious red shift
owing to the enhancement of crystal field. Under the excitation of 460 nm
the luminescence intensity of Ce
3+
doped SCASOF phosphors is enhanced with the increase of Ca/Sr ratio. On the contrary
the emission intensity decreases with the increase of Ca/Sr ratio under the excitation of 400 nm. Accordingly
we infer that the incorporation of Ca might change the occupation sites of luminescence center. This assumption is verified by investigating the photoluminescence spectra
quenching concentration and fluorescence lifetime. Moreover
the thermal quenching and chromaticity coordinates variation are also studied. Results show that Ce
3+
doped SCASOF phosphor has a great potentiality to be a near-UV or blue-convertible phosphor for white-light emitting diode.
关键词
Keywords
references
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