Synthesis and Luminescence Properties of Rare Earth Doped NaGdF4 Upconversion Phosphors

LI Yan-hong; ZANG Guo-feng; MA Jing; LIU Yu-tian

doi:10.3788/fgxb20133408.0982

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Synthesis and Luminescence Properties of Rare Earth Doped NaGdF₄ Upconversion Phosphors

更新时间：2020-08-12

- Synthesis and Luminescence Properties of Rare Earth Doped NaGdF₄ Upconversion Phosphors
- Chinese Journal of Luminescence Vol. 34, Issue 8, Pages: 982-987(2013)
- 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：
- DOI：10.3788/fgxb20133408.0982
  CLC： O482.31
- Received：09 May 2013，
  
  Revised：28 May 2013，
  
  Published：10 August 2013
- 稿件说明：
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李艳红, 臧国凤, 马晶, 刘宇田. 稀土掺杂的NaGdF4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 NaGdF4 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NaGdF4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 NaGdF4 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

Re(Re

=Tm

)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

。估算的平均晶粒尺寸为41~43 nm。在980 nm红外光激发下

和Yb

共掺杂的NaGdF

发光粉发出分别来自于Er

离子

11/ 2

3/2

15/2

跃迁的绿光和

9/2

15/2

跃迁的红光发射

和Yb

共掺杂的NaGdF

发光粉发出分别来自Tm

离子的

跃迁的蓝光、

和

跃迁的红光和

跃迁的近红外光发射。Er

和Yb

共掺杂的NaGdF

发光粉的发光强度及红、绿、蓝光发射的相对强度受Yb

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

Re(Re

=Tm

) 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

. The average crystallite sizes are estimated to be 41~43 nm. Under 980 nm laser excitation

the Er

and Yb

codoped NaGdF

phosphors show green emission from

11/ 2

15/2

and

3/2

15/2

transitions of Er

ions

the red emissions attributed to

9/2

15/2

transitions of Er

ions

respectively. The Tm

and Yb

codoped NaGdF

phosphors show blue emission from

transitions of Tm

ions

red emission assigned to

and

transitions of Tm

ions

near-infrared corresponding to the

transitions of Tm

ions

respectively. The upconversion luminescence intensity and a relative intensity of red

green and blue emission are governed by the doping Yb

concentrations in Er

and Yb

tridoped NaGdF

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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