Issue 3, 2024

Utilizing diametrically opposite thermal quenching luminescence to achieve highly sensitive temperature measurement and anti-counterfeiting

Abstract

The rational design and development of effective optical thermometers based on luminescent materials have received considerable attention over decades due to their unique advantages of fast response, contactless operation and simplicity, to name a few. However, exploring optical thermometers with ultra-high sensitivity is still a challenge. In this work, by taking advantage of the anti-thermal quenching luminescence of Eu3+ ions induced by the thermal redshift of charge transfer bands and the thermal quenching luminescence of Eu2+ and Tb3+ ions, we demonstrate the thermometric potential of CaYGaO4 (CYGO):Eu2+/Eu3+ and CYGO:Eu3+/Tb3+ phosphors. Benefiting from the opposite thermal quenching luminescence of Eu3+ and Eu2+/Tb3+, the maximum relative sensitivity can reach 3.68% K−1 (CYGO:Eu2+/Eu3+) and 5.51% K−1 (CYGO:Eu3+/Tb3+), respectively. Under the irradiation of a single beam of light, the luminous color of the obtained samples undergoes a significant change visible to the naked eye as the temperature increases, which further enhances the temperature sensitivity. In addition to the application of thermometers, considering the strong dependence of luminous intensity and color on excitation wavelength and temperature, we combined these two phosphors to perform a series of demonstration experiments and acquired some fascinating results, which unequivocally confirmed that these phosphors have a bright future in the field of anti-counterfeiting and security labeling.

Graphical abstract: Utilizing diametrically opposite thermal quenching luminescence to achieve highly sensitive temperature measurement and anti-counterfeiting

Supplementary files

Article information

Article type
Research Article
Submitted
09 Oct 2023
Accepted
30 Nov 2023
First published
13 Dec 2023

Inorg. Chem. Front., 2024,11, 799-807

Utilizing diametrically opposite thermal quenching luminescence to achieve highly sensitive temperature measurement and anti-counterfeiting

H. Guo, Y. Chen, L. Wang, Q. Shi, C. Cui, P. Huang and J. Qiao, Inorg. Chem. Front., 2024, 11, 799 DOI: 10.1039/D3QI02063K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements