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白光LED用Sr3(PO4)2 ∶ Tb3+,Li+ 荧光粉的制备工艺及发光性能
Preparation and Luminescent Properties of Sr3(PO4)2 ∶ Tb3+,Li+ Phosphor for White LED
- 液晶与显示 2011年26卷第4期 页码：448-454
- 作者机构：
1. 中国地质大学 材料科学与化学工程学院,湖北 武汉,430074
2. 厦门理工学院 机械工程系,福建 厦门 361024
- 作者简介：
- 基金信息：湖北省科技攻关项目(No.2005AA105A05)();武汉市重大科技项目(No.20041003068-01)()
DOI：10.3788/YJYXS20112604.0448
中图分类号： O482.31;TN104.3收稿日期：2011-02-13，
修回日期：2011-03-28，
网络出版日期：2011-08-20，
纸质出版日期：2011-08-20
- 稿件说明：
移动端阅览
陈凤, 袁曦明, 谢安, 熊小波, 刘丽. 白光LED用Sr<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> ∶ Tb<sup>3+</sup>,Li<sup>+</sup> 荧光粉的制备工艺及发光性能[J]. 液晶与显示, 2011,26(4): 448-454
CHEN Feng, YUAN Xi-ming, XIE An, XIONG Xiao-bo, LIU Li. Preparation and Luminescent Properties of Sr<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> ∶ Tb<sup>3+</sup>,Li<sup>+</sup> Phosphor for White LED[J]. , 2011,26(4): 448-454
陈凤, 袁曦明, 谢安, 熊小波, 刘丽. 白光LED用Sr<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> ∶ Tb<sup>3+</sup>,Li<sup>+</sup> 荧光粉的制备工艺及发光性能[J]. 液晶与显示, 2011,26(4): 448-454 DOI： 10.3788/YJYXS20112604.0448.
CHEN Feng, YUAN Xi-ming, XIE An, XIONG Xiao-bo, LIU Li. Preparation and Luminescent Properties of Sr<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> ∶ Tb<sup>3+</sup>,Li<sup>+</sup> Phosphor for White LED[J]. , 2011,26(4): 448-454 DOI： 10.3788/YJYXS20112604.0448.
摘要
采用沉淀-燃烧法结合超声波技术合成了小颗粒Sr
3
(PO
4
)
2
∶ Tb
3+
荧光粉
测量了其光谱特性。在Sr
3
(PO
4
)
2
∶ Tb
3+
体系中观察到Tb
3+
的特征发射
峰值波长分别为489
542
584
620 nm
分别对应于Tb
3+
的
5
D
4
7
F
6
、
5
D
4
7
F
5
、
5
D
4
7
F
4
和
5
D
4
7
F
3
跃迁
其中542 nm处的绿色发射最强。激发光谱由4f
7
5d
1
宽带吸收(200~280 nm)和4f4f电子跃迁吸收(280~390 nm和475~500 nm)组成
可被近紫外发光二极管(NUV-LED)有效激发。采用
R
+
(R
=Li
Na
K)作为电荷补偿剂
结果表明:Li
+
作为电荷补偿剂使样品发光强度提高了31％
Na
+
和K
+
的掺入则降低了粉体在近紫外区的吸收。
Abstract
A green-emitting phosphor Sr
3
(PO
4
)
2
∶ Tb
3+
Li
+
was prepared by a precipitation-combustion method combined with ultrasonic-disperse technology. Photoluminescence characteristics showed that the phosphor can be efficiently excited by N-UV(379 nm) light
exhibiting four sharp unattached emission peaks located at 489
542
584 and 620 nm
which originate from the typical
5
D
4
7
F
j
(
j
=6
5
4
3) transition of Tb
3+
.
R
+
(R
=Li
Na
K) was introduced into Sr
3
(PO
4
)
2
∶ Tb
3+
as a charge compensator respectively. The results show that the incorporation of Li
+
ions could induce a remarkable improvement of the emission intensity. The highest emission intensity was observed with the compound of 0.15Li
+
co-doped Sr
3
(PO
4
)
2
∶ Tb
3+
whose brightness was increased by 31％ in comparison with that of the Sr
3
(PO
4
)
2
∶ Tb
3+
. Compared with Sr
3
(PO
4
)
2
∶ 0.6Tb
3+
the relatively lower emission intensity was observed when Na
+
/K
+
was doped.
关键词
Keywords
references
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