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Issue 32, 2019
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Step by step designing of sensitive luminescent nanothermometers based on Cr3+,Nd3+ co-doped La3−xLuxAl5−yGayO12 nanocrystals

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Abstract

In this work we present step by step designing of sensitive luminescent thermometers utilizing Cr3+,Nd3+ co-doped La3−xLuxAl5−yGayO12 garnets. In order to achieve this purpose, modification of the local ion environment by the adjustment of the La3+ to Lu3+ and the Al3+ to Ga3+ ion ratios was performed. Additionally, the influence of the Cr3+ and Nd3+ ion concentration on the thermal quenching of Cr3+ luminescence was investigated. All of the abovementioned steps of the host stoichiometry optimization enabled us to obtain a relative sensitivity of luminescent thermometers based on the luminescence intensity ratio of Nd3+(4F5/24I9/2)/Cr3+(2E → 4A2) electronic transitions as high as S = 1.47% °C−1 at −150 °C and S = 1.23% °C−1 at 260 °C for La2LuGa5O12:1%Cr3+,5%Nd3+ nanocrystals. The presented studies provide the verification how stoichiometry of host material affect the relative sensitivity of transition metal/lanthanide ion based luminescent thermometers, enabling knowledgeable designing of highly sensitive luminescent thermometers.

Graphical abstract: Step by step designing of sensitive luminescent nanothermometers based on Cr3+,Nd3+ co-doped La3−xLuxAl5−yGayO12 nanocrystals

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Supplementary files

Article information


Submitted
18 Jun 2019
Accepted
15 Jul 2019
First published
15 Jul 2019

New J. Chem., 2019,43, 12614-12622
Article type
Paper

Step by step designing of sensitive luminescent nanothermometers based on Cr3+,Nd3+ co-doped La3−xLuxAl5−yGayO12 nanocrystals

K. Elzbieciak-Piecka, C. Matuszewska and L. Marciniak, New J. Chem., 2019, 43, 12614
DOI: 10.1039/C9NJ03167G

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