Photoluminescence and Temperature Sensing Properties of Color-tunable CsLa（WO4）2∶Pr3+ Phosphors

LIU Fangfang; ZHENG Qinghua; SONG Mingjun; LI Rongqing; XIA Zhengrong; TONG Yue; ZHOU Weiwei; ZHAO Wang

doi:10.37188/CJL.20230055

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Photoluminescence and Temperature Sensing Properties of Color-tunable CsLa（WO₄）₂∶Pr³⁺ Phosphors

Synthesis and Properties of Materials | 更新时间：2023-09-28

- Photoluminescence and Temperature Sensing Properties of Color-tunable CsLa（WO₄）₂∶Pr³⁺ Phosphors
  增强出版
- Chinese Journal of Luminescence Vol. 44, Issue 9, Pages: 1570-1580(2023)
- 作者机构：
  
  1.淮南师范学院电子工程学院，安徽淮南　232038
  2.潍坊学院化学化工与环境工程学院，山东潍坊　261061
- 作者简介：
- 基金信息：
  
  NSF （Natural Science Foundation） for Distinguished Young Scholars of Anhui University(2022AH020087);NSF of Anhui Province(2108085MB53);University NSF of Anhui Province(KJ2020A0647);Project of Huainan City（144）(144);Research Program of Huainan Normal University(2020XJYB003)
- DOI：10.37188/CJL.20230055
  CLC：
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LIU Fangfang, ZHENG Qinghua, SONG Mingjun, et al. Photoluminescence and Temperature Sensing Properties of Color-tunable CsLa（WO₄）₂∶Pr³⁺ Phosphors. [J]. Chinese Journal of Luminescence 44(9):1570-1580(2023)
DOI：

LIU Fangfang, ZHENG Qinghua, SONG Mingjun, et al. Photoluminescence and Temperature Sensing Properties of Color-tunable CsLa（WO₄）₂∶Pr³⁺ Phosphors. [J]. Chinese Journal of Luminescence 44(9):1570-1580(2023) DOI： 10.37188/CJL.20230055.

摘要

利用高温固相法制备了一系列不同Pr,3+,掺杂浓度的CsLa（WO,4,）,2,荧光粉，测试了X射线衍射（XRD）、漫反射光谱、激发光谱、发射光谱与荧光衰减曲线，讨论了光致发光光谱与浓度、温度的联系，并基于荧光强度比（FIR）技术计算得出温度传感相关参数。CsLa（WO,4,）,2,∶Pr,3+,主要呈现源自,3,P,0,和,1,D,2,能级的发射，对应的最佳掺杂浓度分别为0.03和0.01，经证实电偶极⁃电偶极相互作用导致了浓度猝灭。,3,P,0,与,1,D,2,能级的发射随温度变化趋势不同，这主要归因于Pr,3+,⁃W,6+,的价间电荷迁移（IVCT）、交叉弛豫（CR）和多声子弛豫（MPR）等过程的综合作用。由于上述发射表现出不同的浓度和温度依赖特性，实现了颜色可调谐发光。基于,3,P,1,→,3,H,5,/,3,P,0,→,3,H,4,热耦合能级对和,1,D,2,→,3,H,4,/,3,P,0,→,3,H,4,非热耦合能级对的FIR，计算得到相对灵敏度分别为586.01/,T,2, K,-1,和1 071.78/,T,2, K,-1,，表明该材料在温度传感领域具有潜在应用价值。

Abstract

A series of CsLa（WO,4,）,2, phosphors with different doping concentrations of Pr,3+, were prepared by the high temperature solid-state method. X-ray diffraction （XRD）， diffuse reflectance spectra， excitation spectra， emission spectra and fluorescence decay curves were analyzed. The concentration and temperature-dependent luminescent properties were investigated. The fluorescence temperature sensing parameters were calculated based on the fluorescence intensity ratio （FIR） technique. The optimal doping concentrations of Pr,3+, for the emissions from ,3,P,0, and ,1,D,2, levels in CsLa（WO,4,）,2, were found to be 0.03 and 0.01， respectively， and it was confirmed that concentration quenching was caused by the dipole-dipole interactions. The emission trends of ,3,P,0, and ,1,D,2, levels were different with temperature， mainly due to the effects of the cross-over process to Pr,3+,-W,6+, intervalence charge transfer （IVCT） state， cross relaxation process and multiphonon relaxation process. The different concentration and temperature-dependent characteristics of the emissions from ,3,P,0, and ,1,D,2, levels enabled tunable color emissions. According to the fluorescence intensity ratio （FIR） of ,3,P,1,→,3,H,5,/,3,P,0,→,3,H,4, thermally coupled energy levels and ,1,D,2,→,3,H,4,/,3,P,0,→,3,H,4, non-thermally coupled energy levels， the calculated relative sensitivities were 586.01/,T,2,·K,-1, and 1 071.78/,T,2,·K,-1,， respectively， indicating the potential application of this material in temperature sensing.

关键词

Pr3+CsLa（WO4）2光致发光温度传感荧光强度比（FIR）

Keywords

Pr3+CsLa（WO4）2photoluminescencetemperature sensingfluorescence intensity ratio （FIR）

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