An optical thermometry based on near-infrared luminescence of LiGaSiO4:Cr3+ phosphors excited by red light

被引：0

作者：

Meng, Wei ^{[1
]}

Cai, Pengbo ^{[1
]}

Fu, Xiaoyan ^{[1
]}

Zhang, Hongwu ^{[2
]}

机构：

[1] College of Materials Science and Engineering, Xiamen University of Technology, Xiamen,361024, China

[2] School of Chemistry and Material Sciences, Ludong University, Yantai,264025, China

来源：

Journal of Luminescence | 2022年 / 252卷

基金：

中国国家自然科学基金;

关键词：

FIR filters - Infrared devices - Light - Lithium compounds - Temperature sensors - Thermometers;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A near-infrared luminescent material LiGaSiO4:Cr3+ with triple temperature detection function was synthesized in this paper. The results show that the sample has the best Near-infrared luminescence (NIR) performance under the excitation of 620 nm red light when the concentration of Cr3+ is 0.05%. The emission peak in the near infrared region (705 and 721 nm) is due to the 2E→4A2 energy level transition of Cr3+, and the emission peak in the red region (670 nm) is due to the 4T2→4A2 energy level transition of Cr3+. The obtained results show that the dependences of temperature on three fluorescence intensity ratio (FIR) models including 670/705, 705/721 and 721/605 all show excellent linearity, indicating that high temperature sensing sensitivity and accuracy can be obtained via the combination of three FIR models. Furthermore, FIR (705/721) can provide the highest temperature sensing performance and its relative sensitivity (Sr) is up to 4.32 K-1. All these results indicate LiGaSiO4: Cr3+ possessed great potential in the application of temperature sensing. © 2022

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