六方相LaOF：Er, Yb的上转换发光及温度传感特性

张焕君; 董兴邦; 李海宁; 姜利英; 程学瑞

doi:10.3788/fgxb20204105.0536

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六方相LaOF：Er, Yb的上转换发光及温度传感特性

材料合成及性能 | 更新时间：2020-09-21

- 六方相LaOF：Er, Yb的上转换发光及温度传感特性
- Upconversion Emission and Temperature Sensing of R-LaOF:Er, Yb
- 发光学报 2020年41卷第5期页码：536-541
- 作者机构：
  
  1.郑州轻工业大学物理与电子工程学院, 河南郑州 450002
  2.郑州轻工业大学电气工程学院, 河南郑州 450002
- 作者简介：
  
  [ "张焕君(1983-)，女，河南许昌人，硕士，讲师，2010年于河南师范大学获得硕士学位，主要从事发光材料的研究" ]
  [ "程学瑞(1982-)，男，河南汤阴人，博士，教授，2010年于中国科学技术大学获得博士学位，主要从事发光材料的研究" ]
- 基金信息：
  
  河南省重点研发与推广专项（科技攻关）(192102210003);国家自然科学基金(21503194)
- DOI：10.3788/fgxb20204105.0536
  中图分类号： O482
- 纸质出版日期：2020-5，
  
  收稿日期：2020-1-8，
  
  录用日期：2020-1-19
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张焕君, 董兴邦, 李海宁, 等. 六方相LaOF：Er, Yb的上转换发光及温度传感特性[J]. 发光学报, 2020,41(5):536-541.

Huan-jun ZHANG, Xing-bang DONG, Hai-ning LI, et al. Upconversion Emission and Temperature Sensing of R-LaOF:Er, Yb[J]. Chinese Journal of Luminescence, 2020,41(5):536-541.
张焕君, 董兴邦, 李海宁, 等. 六方相LaOF：Er, Yb的上转换发光及温度传感特性[J]. 发光学报, 2020,41(5):536-541. DOI： 10.3788/fgxb20204105.0536.

Huan-jun ZHANG, Xing-bang DONG, Hai-ning LI, et al. Upconversion Emission and Temperature Sensing of R-LaOF:Er, Yb[J]. Chinese Journal of Luminescence, 2020,41(5):536-541. DOI： 10.3788/fgxb20204105.0536.

摘要

氟氧化物兼有氧化物优异的稳定性和氟化物的低声子能量，是上转换发光材料的一种热点基质材料，因而研究六方相LaOF：Er，Yb的上转换发光性能及其温度特性具有重要意义。本文采用水热法制备了六方相LaOF：Er，Yb荧光材料，通过X射线衍射（XRD）、扫描电镜（SEM）和荧光光谱对其结构和上转换荧光性能进行表征。实验结果表明，水热法120 ℃得到六方相LaF

，经800 ℃和1 000 ℃退火后分别形成四方相LaOF和六方相LaOF。980 nm激发下，六方相LaOF：Er，Yb中Yb

与Er

存在能量传递，通过双光子吸收产生绿光和红光的上转换荧光，并且Yb

与Er

的最佳浓度分别为3%和1%。最后研究了六方相LaOF：Er，Yb在温度传感方面的应用，其在150~400 K温度范围的相对灵敏度和绝对灵敏度分别为0.037 K

-1

和0.004 3 K

-1

。该材料具有优异的温度传感特性，对荧光温度传感器件的设计和应用具有指导意义。

Abstract

Recent years

Up-conversion(UC) luminescence exhibits potential application in temperature measurement based on FIR(fluorescence intensity ratio) technique

which has drawn considerable attention. Lanthanum oxyfluoride(LaOF) inherits the advantage of low lattice phonon energy

and exhibits superior thermal and chemical stability

showing efficient UC luminescence. Thus

limited attention has been paid to the temperature sensing characteristics of Er

/Yb

co-doped LaOF. In the present work

rhombohedral LaOF:Er

Yb phosphors are prepared using hydrothermal method. The structure and fluorescence properties are characterized by X-ray diffraction

SEM and fluorescence spectra. Hexagonal LaF

is prepared using hydrothermal method at 120℃. After annealing at 1 000℃

rhombohedral LaOF is obtained. The agglomerated particle crystallizes into one larger particle in the range of several micron following annealing. Excited by 980 nm

the characteristic emission from the Er

ion is observed

including two green emission bands and one red emission

11/2

→

15/2

and

3/2

→

15/2

as well as

9/2

→

15/2

transitions. Energy transfer between Er

and Yb

is confirmed because of two-photon process

resulting in upconversion emissions. Finally

the optical temperature sensing properties of R-LaOF:Yb

Er are investigated. The results suggest that R-LaOF:Er

Yb exhibits intense emission and high sensitivity. Its maximum relative sensitivity

and absolute sensitivity

are 0.037 K

-1

and 0.004 3 K

-1

respectively in the temperature range of 150-400 K

suggesting it is a potential candidate in temperature sensing.

关键词

上转换发光温度传感荧光强度比技术灵敏度

Keywords

upconversion emissiontemperature sensingfluorescence intensity ratio techniquesensor sensitivity

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