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1. 厦门大学 材料学院,福建 厦门,361005
2. 福建省特种先进材料重点实验室,福建 厦门,361005
纸质出版日期:2012-9-10,
收稿日期:2012-6-17,
修回日期:2012-7-12,
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彭杰, 曾人杰, 李郎楷. 非均相沉淀法制备的Sr<sub>3-<em>x</em></sub>Si<sub>1-<em>x</em></sub>Al<sub><em>x</em></sub>O<sub>5</sub>∶<em>x</em>Ce<sup>3+</sup> 荧光粉及其发光性能[J]. 发光学报, 2012,33(9): 966-972
PENG Jie, ZENG Ren-jie, LI Lang-kai. Luminescent Properties of Sr<sub>3-<em>x</em></sub>Si<sub>1-<em>x</em></sub>Al<sub><em>x</em></sub>O<sub>5</sub>∶<em>x</em>Ce<sup>3+</sup> Phosphors Prepared by Heterogeneous Precipitation Method[J]. Chinese Journal of Luminescence, 2012,33(9): 966-972
彭杰, 曾人杰, 李郎楷. 非均相沉淀法制备的Sr<sub>3-<em>x</em></sub>Si<sub>1-<em>x</em></sub>Al<sub><em>x</em></sub>O<sub>5</sub>∶<em>x</em>Ce<sup>3+</sup> 荧光粉及其发光性能[J]. 发光学报, 2012,33(9): 966-972 DOI: 10.3788/fgxb20123309.0966.
PENG Jie, ZENG Ren-jie, LI Lang-kai. Luminescent Properties of Sr<sub>3-<em>x</em></sub>Si<sub>1-<em>x</em></sub>Al<sub><em>x</em></sub>O<sub>5</sub>∶<em>x</em>Ce<sup>3+</sup> Phosphors Prepared by Heterogeneous Precipitation Method[J]. Chinese Journal of Luminescence, 2012,33(9): 966-972 DOI: 10.3788/fgxb20123309.0966.
采用非均相沉淀法制备了Sr
3-
x
Si
1-
x
Al
x
O
5
∶
x
Ce
3+
荧光粉
并与高温固相法制备的该荧光粉进行了对比。以XRD、SEM和荧光光谱分析来表征所制备的荧光粉。结果表明
非均相沉淀法比高温固相反应法制备的荧光粉相纯度更高
颗粒分布更窄
晶面清晰
团聚程度小
相对发光强度也更高。荧光粉的激发光谱为270~500 nm的双峰宽带
最强激发峰位于417 nm处。发射光谱为450~700 nm的单峰宽带
峰值位于525 nm处。电荷补偿剂对荧光粉相对发光强度影响较大
外加Al
3+
置换Si
4+
作为电荷补偿剂比外加Li
+
置换Sr
2+
的效果更好。
Phosphors of nominal composition Sr
3-
x
Si
1-
x
Al
x
O
5
∶
x
Ce
3+
were prepared by heterogeneous precipitation method and high temperature solid state reaction method
respectively. The phosphors were characterized by XRD
SEM and fluorescence spectrum analysis. The results show that phosphors synthesized by heterogeneous precipitation method have higher phase purity
narrower particle size distribution
clearer crystal surface and lighter aggregation
also yield higher relative luminous intensity
than those by high temperature solid state reaction method. The excitation spectra of the phosphors range from 270 nm to 500 nm with the bimodal broadband
while the strongest excitation peak at 417 nm. The emission spectra range from 450 nm to 700 nm with single-peak broadband
with peak at 525 nm. Charge compensation has a great influence on the relative luminous intensity of phosphors. It could be conclude that adding Al
3+
to substitute Si
4+
as charge compensation might be better than adding Li
+
to substitute Sr
2+
.
白光LED电荷补偿硅酸盐团聚
white LEDcharge compensationsilicateagglomeration
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