Temperature Dependence of Upconversion Luminescence in NaYF4：Yb3+, Er3+ Nanoparticles

ZHAO Cheng-zhou; KONG Xiang-gui; SONG Shu-guang; ZENG Qing-hui

doi:10.3788/fgxb20133410.1283

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Temperature Dependence of Upconversion Luminescence in NaYF₄：Yb³⁺, Er³⁺ Nanoparticles

更新时间：2020-08-12

- Temperature Dependence of Upconversion Luminescence in NaYF₄：Yb³⁺, Er³⁺ Nanoparticles
- Chinese Journal of Luminescence Vol. 34, Issue 10, Pages: 1283-1287(2013)
- 作者机构：
  
  1. 发光学及应用国家重点实验室中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
  2. 中国科学院大学, 北京 100049
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20133410.1283
  CLC： O482.31
- Received：16 May 2013，
  
  Revised：03 August 2013，
  
  Published：10 October 2013
- 稿件说明：
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赵承周, 孔祥贵, 宋曙光, 曾庆辉. NaYF4：Yb3+, Er3+纳米粒子的上转换发光的温度特性[J]. 发光学报, 2013,34(10): 1283-1287

ZHAO Cheng-zhou, KONG Xiang-gui, SONG Shu-guang, ZENG Qing-hui. Temperature Dependence of Upconversion Luminescence in NaYF4：Yb3+, Er3+ Nanoparticles[J]. Chinese Journal of Luminescence, 2013,34(10): 1283-1287
赵承周, 孔祥贵, 宋曙光, 曾庆辉. NaYF4：Yb3+, Er3+纳米粒子的上转换发光的温度特性[J]. 发光学报, 2013,34(10): 1283-1287 DOI： 10.3788/fgxb20133410.1283.

ZHAO Cheng-zhou, KONG Xiang-gui, SONG Shu-guang, ZENG Qing-hui. Temperature Dependence of Upconversion Luminescence in NaYF4：Yb3+, Er3+ Nanoparticles[J]. Chinese Journal of Luminescence, 2013,34(10): 1283-1287 DOI： 10.3788/fgxb20133410.1283.

摘要

利用高温热溶剂法合成了NaYF

:20%Yb

2%Er

纳米粒子

通过X射线衍射谱、扫描电镜及低温荧光光谱对其结构、形貌及发光性质进行了表征。研究结果表明:合成的纳米粒子为六角相

粒径大小约30 nm。变温光谱研究表明:由于

3/2

和

11/2

能级差较小

当温度增加至45 K时

3/2

能级和

11/2

能级的电子布局同时相应地增加;而当温度超过45 K之后

温度依赖的

11/2

能级布局随着温度的提高而增多

表现为520 nm的发光随着温度的提高一直增强。由于无辐射弛豫速率随温度升高而快速增加

导致545 nm的发光随着温度的提高先增强后减弱。

Abstract

Uniform NaYF

:20%Yb

2%Er

nanoparticles were synthesized

via

solvothermal method following high temperature. The X-ray diffraction (XRD) shows that the samples are -NaYF

nanocrystals

and SEM images show that the nanoparticles have an average of 30 nm. The intensity of 520 nm emissions gradually increase with temperature rising from 13 K to 300 K

while the intensity of 545 nm emissions first increase and then decrease under 980 nm laser excitation. The reason for this phenomenon is that the electronic distribution of

11/2

is dependent on the temperature

while the emissions of

3/2

energy level is governed by a competition process between the thermal agitation and non-radiation decay.

关键词

Keywords

references

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