Effect of Tm3+ Concentration on Upconversion Fluorescence in Y2(MoO4)3：Tm3+, Yb3+ Phosphors

LI Xiang-ping; TONG Li-li; CHENG Li-hong; SUN Jia-shi; ZHANG Jin-su; ZHANG Xi-zhen; CHEN B

doi:10.3788/fgxb20143508.0905

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Effect of Tm³⁺ Concentration on Upconversion Fluorescence in Y₂(MoO₄)₃：Tm³⁺, Yb³⁺ Phosphors

更新时间：2020-08-12

- Effect of Tm³⁺ Concentration on Upconversion Fluorescence in Y₂(MoO₄)₃：Tm³⁺, Yb³⁺ Phosphors
- Chinese Journal of Luminescence Vol. 35, Issue 8, Pages: 905-910(2014)
- 作者机构：
  
  大连海事大学物理系,辽宁大连,116026
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20143508.0905
  CLC： O611.4;O482.31
- Received：25 April 2014，
  
  Revised：27 May 2014，
  
  Published：03 August 2014
- 稿件说明：
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李香萍, 佟莉莉, 程丽红等. Tm3+浓度对Y2（MoO4）3：Tm3+，Yb3+荧光粉上转换发光性质的影响[J]. 发光学报, 2014,35(8): 905-910

LI Xiang-ping, TONG Li-li, CHENG Li-hong etc. Effect of Tm3+ Concentration on Upconversion Fluorescence in Y2(MoO4)3：Tm3+, Yb3+ Phosphors[J]. Chinese Journal of Luminescence, 2014,35(8): 905-910
李香萍, 佟莉莉, 程丽红等. Tm3+浓度对Y2（MoO4）3：Tm3+，Yb3+荧光粉上转换发光性质的影响[J]. 发光学报, 2014,35(8): 905-910 DOI： 10.3788/fgxb20143508.0905.

LI Xiang-ping, TONG Li-li, CHENG Li-hong etc. Effect of Tm3+ Concentration on Upconversion Fluorescence in Y2(MoO4)3：Tm3+, Yb3+ Phosphors[J]. Chinese Journal of Luminescence, 2014,35(8): 905-910 DOI： 10.3788/fgxb20143508.0905.

摘要

采用传统的高温固相反应法合成了Tm

/Yb

共掺杂Y

（MoO

）

系列荧光粉。XRD结果表明合成的样品为相纯度好的Y

（MoO

）

。在980 nm光激发下，样品具有较强的位于487 nm和800 nm的蓝色和近红外发射，同时伴有较弱的位于649 nm的红光发射。它们分别来自于Tm

的

、

和

跃迁。根据功率相关的上转换发射和能级图分析了Tm

的上转换发光机制。结果表明，

和

能级的布居分别来自于三光子和两光子的能量传递上转换。此外，随着Tm

浓度的增加，蓝色、红色和近红外发射带均呈先增加后降低的趋势，即发生了浓度猝灭。同时，蓝光发射和近红外发射的强度比随Tm

掺杂浓度的增加而减小。

Abstract

/Yb

co-doped Y

(MoO

)

phosphors with various Tm

concentrations were prepared

via

a traditional high temperature solid state reaction method using NH

as a flux. The microstructure analysis by means of X-ray diffraction revealed that the as-synthesized samples presented a pure phase Y

(MoO

)

. Under 980 nm excitation

intense blue

near infrared (NIR) and weak red upconversion emissions which centered at 487

800 and 649 nm were observed

and these emissions were corresponding to the

and

transitions of Tm

respectively. The upconversion luminescence mechanisms of Y

(MoO

)

:Tm

phosphors were analyzed based upon the power dependent upconversion emissions. The results show that the populations of

and

levels come from three-and two-photon energy transfer upconversion processes

respectively. The possible upconversion mechanisms for the blue

red and NIR emissions were discussed based on the energy level diagrams of Tm

and Yb

. In addition

with the increase of Tm

concentration

all of the emission bands obviously increase firstly and then decrease

which can be attributed to the concentration quenching. Meanwhile

the intensity ratio of the blue emission and the NIR emission decreases with the increase of Tm

concentration.

关键词

Keywords

references

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