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稀土掺杂的NaGdF4上转换发光材料的合成与发光特性研究
Synthesis and Luminescence Properties of Rare Earth Doped NaGdF4 Upconversion Phosphors
- 发光学报 2013年34卷第8期 页码：982-987
- 作者机构：
沈阳化工大学 材料科学与工程学院,辽宁 沈阳,110142
- 作者简介：
- 基金信息：辽宁省教育厅科学技术研究项目(L2011063)资助项目()
DOI：10.3788/fgxb20133408.0982
中图分类号： O482.31收稿日期：2013-05-09，
修回日期：2013-05-28，
纸质出版日期：2013-08-10
- 稿件说明：
移动端阅览
李艳红, 臧国凤, 马晶, 刘宇田. 稀土掺杂的NaGdF<sub>4</sub>上转换发光材料的合成与发光特性研究[J]. 发光学报, 2013,34(8): 982-987
LI Yan-hong, ZANG Guo-feng, MA Jing, LIU Yu-tian. Synthesis and Luminescence Properties of Rare Earth Doped NaGdF<sub>4</sub> Upconversion Phosphors[J]. Chinese Journal of Luminescence, 2013,34(8): 982-987
李艳红, 臧国凤, 马晶, 刘宇田. 稀土掺杂的NaGdF<sub>4</sub>上转换发光材料的合成与发光特性研究[J]. 发光学报, 2013,34(8): 982-987 DOI： 10.3788/fgxb20133408.0982.
LI Yan-hong, ZANG Guo-feng, MA Jing, LIU Yu-tian. Synthesis and Luminescence Properties of Rare Earth Doped NaGdF<sub>4</sub> Upconversion Phosphors[J]. Chinese Journal of Luminescence, 2013,34(8): 982-987 DOI： 10.3788/fgxb20133408.0982.
摘要
采用水热法制备了一系列不同掺杂浓度的NaGdF
4
:
Re(Re
=Tm
3+
Er
3+
Yb
3+
)上转换发光粉。通过X射线衍射(XRD)、电子扫描电镜(SEM)和上转换发射光谱对样品进行了表征。XRD研究结果表明:合成的样品均为六方结构NaGdF
4
。估算的平均晶粒尺寸为41~43 nm。在980 nm红外光激发下
Er
3+
和Yb
3+
共掺杂的NaGdF
4
发光粉发出分别来自于Er
3+
离子
2
H
11/ 2
4
S
3/2
4
I
15/2
跃迁的绿光和
4
F
9/2
4
I
15/2
跃迁的红光发射
Tm
3+
和Yb
3+
共掺杂的NaGdF
4
发光粉发出分别来自Tm
3+
离子的
1
G
4
3
H
6
跃迁的蓝光、
1
G
4
3
F
4
和
3
F
2
3
3
H
6
跃迁的红光和
3
H
4
3
H
6
跃迁的近红外光发射。Er
3+
Tm
3+
和Yb
3+
共掺杂的NaGdF
4
发光粉的发光强度及红、绿、蓝光发射的相对强度受Yb
3+
离子掺杂浓度的影响。对样品中可能的上转换发光机制进行了讨论。计算的色坐标显示:可通过改变掺杂离子浓度对上转换发光的颜色进行调控。
Abstract
A series of NaGdF
4
:
Re(Re
=Tm
3+
Er
3+
Yb
3+
) upconversion luminescence phosphors with various doping concentrations were prepared by a hydrothermal method. X-ray diffraction (XRD)
field emission scanning electron microscope (SEM) and upconversion (UC) emission spectra were used to characterize the samples. The results of XRD indicate that all the samples are hexagonal phase NaGdF
4
. The average crystallite sizes are estimated to be 41~43 nm. Under 980 nm laser excitation
the Er
3+
and Yb
3+
codoped NaGdF
4
phosphors show green emission from
2
H
11/ 2
4
I
15/2
and
4
S
3/2
4
I
15/2
transitions of Er
3+
ions
the red emissions attributed to
4
F
9/2
4
I
15/2
transitions of Er
3+
ions
respectively. The Tm
3+
and Yb
3+
codoped NaGdF
4
phosphors show blue emission from
1
G
4
3
H
6
transitions of Tm
3+
ions
red emission assigned to
1
G
4
3
F
4
and
3
F
2
3
3
H
6
transitions of Tm
3+
ions
near-infrared corresponding to the
3
H
4
3
H
6
transitions of Tm
3+
ions
respectively. The upconversion luminescence intensity and a relative intensity of red
green and blue emission are governed by the doping Yb
3+
concentrations in Er
3+
Tm
3+
and Yb
3+
tridoped NaGdF
4
phosphors. The possible upconversion luminescence mechanisms of the samples are discussed. The calculated CIE color coordinates display that the upconversion luminescence color can be tuned by varying the doping ions concentration.
关键词
Keywords
references
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