Issue 18, 2024

Exploring structural and optical properties of CLSO:Dy for ultra-sensitive luminescent thermometers and high-bright screen printing

Abstract

Herein, a novel scheme is employed to develop ultra-sensitive luminescent thermometers and high-bright luminescent inks for screen printing. We synthesize CaLa4Si3O13 (CLSO):Dy3+ by a traditional high-temperature solid-phase method and accurately predict its radiation properties using Judd–Ofelt (J–O) theory. On this basis, Eu3+ or Tb3+ ions with different radii are introduced into CLSO:Dy3+ to modify the crystal structure rigidity. The activation energies of CLSO:Dy3+, Dy3+/Eu3+, and Dy3+/Tb3+ samples are calculated to be 0.256 eV, 0.315 eV and 0.289 eV, respectively, which demonstrate that Eu3+ or Tb3+ enhances the structural stiffness, and thus, improves the thermal stability of materials. Simultaneously, the Debye temperature and thermal expansion coefficients as valuable parameters for structural stiffness also confirm the above-mentioned results. Furthermore, we propose a strategy in which the multiplication of LIRs based on multiple emission peaks with opposite thermal quenching properties follow a Boltzmann-type distribution, resulting in a dramatically increased relative sensitivity of CLSO:Dy3+, Dy3+/Eu3+, and Dy3+/Tb3+ thermometers to 2.92% K−1, 3.32% K−1 and 3.19% K−1, respectively. This work not only provides valuable insights into the development of superior temperature sensitive materials but also develops optical anti-counterfeiting technology based on screen printing.

Graphical abstract: Exploring structural and optical properties of CLSO:Dy for ultra-sensitive luminescent thermometers and high-bright screen printing

Supplementary files

Article information

Article type
Research Article
Submitted
18 May 2024
Accepted
15 Jul 2024
First published
29 Jul 2024

Inorg. Chem. Front., 2024,11, 5924-5938

Exploring structural and optical properties of CLSO:Dy for ultra-sensitive luminescent thermometers and high-bright screen printing

X. Zhang, Z. Sun, R. Lu, J. Xu, H. Xu and W. Xu, Inorg. Chem. Front., 2024, 11, 5924 DOI: 10.1039/D4QI01255K

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