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1. 福州大学 材料科学与工程学院,福建 福州,350108
2. 福州大学 生态环境材料先进技术重点实验室,福建 福州,350108
纸质出版日期:2016-2-10,
收稿日期:2015-11-20,
修回日期:2015-12-8,
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游静, 夏丽娜, 李湘祁等. Sr<sub>2</sub>SiO<sub>4</sub>:Ce<sup>3+</sup>,Li<sup>+</sup>蓝紫色荧光粉发光性能的研究[J]. 发光学报, 2016,37(2): 131-137
YOU Jing, XIA Li-na, LI Xiang-qi etc. Luminescence of Blue-purple Emitting Sr<sub>2</sub>SiO<sub>4</sub>:Ce<sup>3+</sup>,Li<sup>+</sup> Phosphor[J]. Chinese Journal of Luminescence, 2016,37(2): 131-137
游静, 夏丽娜, 李湘祁等. Sr<sub>2</sub>SiO<sub>4</sub>:Ce<sup>3+</sup>,Li<sup>+</sup>蓝紫色荧光粉发光性能的研究[J]. 发光学报, 2016,37(2): 131-137 DOI: 10.3788/fgxb20163702.0131.
YOU Jing, XIA Li-na, LI Xiang-qi etc. Luminescence of Blue-purple Emitting Sr<sub>2</sub>SiO<sub>4</sub>:Ce<sup>3+</sup>,Li<sup>+</sup> Phosphor[J]. Chinese Journal of Luminescence, 2016,37(2): 131-137 DOI: 10.3788/fgxb20163702.0131.
以MCM-41为硅源
采用共沉淀法制备Sr
2-
x
SiO
4
:
x
Ce
3+
(
x
=0.01~0.09
步长为0.01)和Sr
1.95-
y
SiO
4
: 0.05Ce
3+
y
Li
+
(
y
= 0.01~0.07
步长为0.02)蓝紫色荧光粉。Sr
2-
x
SiO
4
:
x
Ce
3+
的发射光谱是一个不对称的宽带
最大峰值在410 nm左右。Ce
3+
的最佳掺杂量为5%。Ce
3+
离子倾向于占据九配位的Sr(Ⅱ)格位。共掺电荷补偿剂Li
+
可以有效地提高Sr
1.95
SiO
4
: 0.05Ce
3+
的发光强度
其中Li
+
离子对1 100 ℃煅烧样品的发光强度的提高程度比1 000 ℃的更高
Li
+
的最佳掺杂量为
y
=0.05。
Blue-purple emitting Sr
2-
x
SiO
4
:
x
Ce
3+
(
x
=0.01-0.09
in steps of 0.01) and Sr
1.95-
y
SiO
4
:0.05Ce
3+
y
Li
+
(
y
=0.01-0.07
in steps of 0.02) phosphors have been prepared by co-precipitation method with MCM-41 as silica source. The emission spectra of Sr
2-
x
SiO
4
:
x
Ce
3+
show an asymmetric broad band with a maximum around 410 nm and the critical mole fraction is found to be 5%. Ce
3+
ions prefer nine-coordinated Sr(Ⅱ) sites over ten-coordinated Sr(Ⅰ) sites. The emission intensity of Sr
1.95
SiO
4
:0.05Ce
3+
can be improved effectively by co-doping Li
+
ions as charge compensator and a greater degree of the improvement is observed for phosphor calcined at 1 100 ℃ compared with 1 000 ℃. The most suitable doping amount of Li
+
for Sr
1.95-
y
SiO
4
:0.05Ce
3+
y
Li
+
is
y
=0.05.
荧光粉Sr2SiO4:Ce3+Li+发光
phosphorSr2SiO4:Ce3+Li+luminescence
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