Temperature Sensing Performances of NaLa(WO4)2 Up-conversion Phosphor Co-doped with Yb3+/Ho3+/Tm3+

被引：0
|
作者：
Miao J. [1 ]
Wei S. [1 ]
Zhang Y. [1 ]
Yang X. [1 ]
Li L. [1 ]
机构：
[1] School of Chemistry and Materials Science, Nanjing University of Information Science & Technology, Nanjing
来源：
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2020年 / 38卷 / 06期
关键词：
Fluorescence intensity ratio; Hydrothermal; Non-thermally coupled energy level; Rare earths; Up-conversion;
D O I：
10.11785/S1000-4343.20200604
中图分类号：
学科分类号：
摘要：
The sample of NaLa(WO4)2: Yb3+/Ho3+/Tm3+ was prepared using a hydrothermal method, followed by a heat treatment at 800℃. The crystal structure, micro-morphology and temperature sensing properties of the sample were investigated by X-ray diffraction, field emission scanning electron microscope and fluorescence spectrometer. The results showed that the sample has a pure tetragonal phase, and is consisted of spindle like micro-crystals with good dispersivity. Under 980 nm excitation, the emission peaks of the sample are located at 475, 544, 658 and 689 nm, which corresponding to the characteristic energy level transitions of 1G4→3H6 (Tm3+), 5F4, 5S2→5I8 (Ho3+), 5F5→5I8 (Ho3+) and 3F2, 3→3H6 (Tm3+), respectively. Based on the technology of fluorescence intensity ratio, the temperature sensing properties of three non-thermal coupled energy levels, namely I689/I475, I689/I544 and I689/I658, were investigated in the temperature range of 293~553 K. It was found that the maximum values of absolute sensitivity SA and relative sensitivity SR reach 0.0352 and 1.097%•K-1, respectively. The results indicated that the sample has good temperature sensing performance and can be potential candidates for optical temperature sensors. © 2020, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.
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页码：738 / 743
页数：5
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