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Highly sensitive optical ratiometric thermometry by exciting Eu3+/Tb3+'s unusual absorption lines

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Abstract

A guideline for designing sensitive thermometry is proposed. It reveals that using two emission bands that possess the opposite change tendencies against temperature makes it easier to achieve a larger relative sensitivity. Based on the guidelines, a highly sensitive strategy for optical thermal detection that depends on the Tb3+-to-Eu3+ emission ratio is designed by exciting Eu3+/Tb3+'s unusual absorption lines. This can be easily driven by a commonly used and cheap 405 nm laser diode. Moreover, its maximum relative sensitivity reaches up to 2.02% K−1 at 610 K, one of the largest sensitivities reported so far.

Graphical abstract: Highly sensitive optical ratiometric thermometry by exciting Eu3+/Tb3+'s unusual absorption lines

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Publication details

The article was received on 22 Jul 2019, accepted on 27 Aug 2019 and first published on 27 Aug 2019


Article type: Paper
DOI: 10.1039/C9CP04094C
Phys. Chem. Chem. Phys., 2019, Advance Article

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    Highly sensitive optical ratiometric thermometry by exciting Eu3+/Tb3+'s unusual absorption lines

    L. Li, X. Qi, F. Qin, L. Li, H. Gao, Y. Zheng and Z. Zhang, Phys. Chem. Chem. Phys., 2019, Advance Article , DOI: 10.1039/C9CP04094C

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