Issue 44, 2020

Cr3+ based nanocrystalline luminescent thermometers operating in a temporal domain

Abstract

Cr3+ doped nanocrystals were examined as a noncontact temperature sensor in a lifetime-based approach. The impact of both the analysis protocols and host materials on the lifetime-based approach was systematically investigated. Temperature-dependent luminescence decay curves were analyzed according to three different procedures (average lifetime approach, double exponential fit and time-gated ratiometric approach). The advantages and drawbacks of each method are discussed. Additionally, the thermal sensitivities derived from the average lifetime approach and the double exponential fit revealed a strong dependence of the thermal sensitivity of the Cr3+ doped nanocrystals on the crystal field strength. In these cases, it was found that the long metal–oxygen distances in the host materials improve the thermal sensitivity of the system. This work reveals the importance of both host materials and analysis procedures in the lifetime thermal sensitivity of Cr3+ doped nanocrystals and opens up an avenue towards their future optimization.

Graphical abstract: Cr3+ based nanocrystalline luminescent thermometers operating in a temporal domain

Supplementary files

Article information

Article type
Paper
Submitted
27 Jun 2020
Accepted
22 Oct 2020
First published
22 Oct 2020

Phys. Chem. Chem. Phys., 2020,22, 25949-25962

Cr3+ based nanocrystalline luminescent thermometers operating in a temporal domain

K. Elzbieciak-Piecka, J. Drabik, D. Jaque and L. Marciniak, Phys. Chem. Chem. Phys., 2020, 22, 25949 DOI: 10.1039/D0CP03453C

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