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

被引：0

作者：

Liu F. ^{[1
]}

Zheng Q. ^{[1
]}

Song M. ^{[2
]}

Li R. ^{[1
]}

Xia Z. ^{[1
]}

Tong Y. ^{[1
]}

Zhou W. ^{[1
]}

Zhao W. ^{[1
]}

机构：

[1] School of Electrical Engineering, Huainan Normal University, Huainan

[2] School of Chemistry and Chemical & Environmental Engineering, Weifang University, Weifang

来源：

Faguang Xuebao/Chinese Journal of Luminescence | 2023年 / 44卷 / 09期

关键词：

CsLa（WO[!sub]4[!/sub]）[!sub]2[!/sub; fluorescence intensity ratio （FIR）; photoluminescence; Pr[!sup]3+[!/sup; temperature sensing;

D O I：

10.37188/CJL.20230055

中图分类号：

学科分类号：

摘要：

A series of CsLa（WO4）2 phosphors with different doping concentrations of Pr3+ 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 Pr3+ for the emissions from 3P0 and 1D2 levels in CsLa（WO4）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 3P0 and 1D2 levels were different with temperature， mainly due to the effects of the cross-over process to Pr3+-W6+ intervalence charge transfer （IVCT） state， cross relaxation process and multiphonon relaxation process. The different concentration and temperature-dependent characteristics of the emissions from 3P0 and 1D2 levels enabled tunable color emissions. According to the fluorescence intensity ratio （FIR） of 3P1→3H5/3P0→3H4 thermally coupled energy levels and 1D2→3H4/3P0→3H4 non-thermally coupled energy levels， the calculated relative sensitivities were 586.01/T2·K-1 and 1 071.78/T2·K-1， respectively， indicating the potential application of this material in temperature sensing. © 2023 Chines Academy of Sciences. All rights reserved.

引用

页码：1570 / 1580

页数：10

共 36 条

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