Issue 14, 2021

Energy transfer-triggered multicolor emissions in Tb3+/Eu3+-coactivated Y2Mo3O12 negative thermal expansion microparticles for dual-channel tunable luminescent thermometers

Abstract

A rational control of the thermal quenching performance is crucial for achieving high quality luminescent thermometers. Herein, we report the synthesis of Tb3+/Yb3+-coactivated Y2Mo3O12 (YMO) negative thermal expansion (NTE) microparticles with color-tunable emissions. Upon irradiation with 297 nm light, multicolor emissions (green-yellow-red) are observed in the developed samples which are trigged by efficient energy transfer (ET) from the Tb3+ to Eu3+ ions. Furthermore, according to the theoretical analysis based on the decay time and Inokuti–Hirayama model, the aforementioned ET mechanism is related to the dipole–quadrupole interaction. Owing to the NTE behaviors of the YMO host, ET between Tb3+ and Eu3+ ions is enhanced, causing them to possess diverse thermal quenching properties. Employing the fluorescence intensity ratio technology, the thermometric behaviors of the developed microparticles were investigated by discussing the temperature-dependent emission intensities of Tb3+ and Eu3+ ions. It is found that the sensitivities of the designed NTE microparticles are dependent on both the doping concentration and excitation wavelength. Additionally, the maximum absolute and relative sensitivities of YMO:Tb3+/0.10Eu3+ NTE microparticles are 0.017 K−1 and 0.32% K−1, respectively, at 363 K. These results reveal that the developed NTE microparticles have the capacity for contactless thermometry and their thermometric behaviors can be controlled by adjusting the doping content and excitation wavelength.

Graphical abstract: Energy transfer-triggered multicolor emissions in Tb3+/Eu3+-coactivated Y2Mo3O12 negative thermal expansion microparticles for dual-channel tunable luminescent thermometers

Supplementary files

Article information

Article type
Paper
Submitted
11 mar. 2021
Accepted
10 jun. 2021
First published
11 jun. 2021
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2021,2, 4824-4831

Energy transfer-triggered multicolor emissions in Tb3+/Eu3+-coactivated Y2Mo3O12 negative thermal expansion microparticles for dual-channel tunable luminescent thermometers

P. Du, L. Luo, Y. Hou and W. Li, Mater. Adv., 2021, 2, 4824 DOI: 10.1039/D1MA00218J

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