Cr3+‐Facilitated Ultra‐Sensitive Luminescence Ratiometric Thermometry at Cryogenic Temperature. Issue 3 (6th January 2023)

• Record Type: Journal Article
• Authors: Li, Rui; Wei, Guohui; Wang, Zhijun; Wang, Ye; Li, Jiehong; He, Shaoxuan; Li, Leipeng; Suo, Hao; Ding, Wenge; Li, Panlai
• Is Part Of: Laser & photonics reviews. Volume 17:Issue 3(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-01-06
• Subjects: Boltzmann distribution -- Cr3+ -- cryogenic temperature -- luminescence ratiometric thermometry; Lasers -- Periodicals; Photonics -- Periodicals; Lasers -- Périodiques; Photonique -- Périodiques; 621.36
• DOI: 10.1002/lpor.202200589
• Languages: English
• ISSNs: 1863-8880

Abstract

Abstract: Non‐contact ratiometric luminescence thermometry continues to gain popularity over decades due to its fascinating features of high accuracy, fast response, and simplicity. In this regard, rational design of optical thermometers with ultrahigh relative sensitivity and low temperature resolution has become a cutting‐edge topic. Herein, a luminescence intensity ratio thermometric method depending on the emission line at 698 nm (peak 1) and the emission bands at 713 and 721 nm (peaks 2 and 3) of Li1.97 Zn1.0292 Ge3 O8 :0.08%Cr 3+ is proposed. As temperature elevates from 50 to 300 K, the 698 nm emission line undergoes an 84‐fold increase while the 713 and 721 nm emission bands show the opposite decline trend. This fascinating feature enables high relative sensitivity of 13.09% K −1 and low temperature resolution of 0.032 K, which are superior to most of the reported optical thermometers. This work is expected to provide more insights for designing excellent and reliable optical thermometers by employing Cr 3+ activated luminescent materials. Abstract : Non‐contact ratio‐metric luminescence thermometers gain popularity for their fascinating properties of high accuracy and fast response. Employing Cr 3+ ‐activated luminescent material, the emission lines at 698 nm are increased by 84‐fold, and the emission bands at 713 and 721 nm exhibit a quenching trend in the 50–300 K range. This property is utilized to design excellent and reliable optical temperatures.