Ultra-high sensitivity of multicolor Sm3+ -doped LiSrVO4 phosphors for contactless optical thermometers

Dalton Transactions : an International Journal of Inorganic Chemistry
Peng DuLaihui Luo

Abstract

To overcome the existing challenge of temperature monitoring with high accuracy, we designed Sm3+-doped LiSrVO4 phosphors with ultra-high sensitivity as promising candidates for optical thermometers. The prepared samples could emit multicolor emissions after excitation at 343 nm and the optimum doping concentration for the Sm3+ ions in the selected host was 1 mol%. The mechanism of energy transfer from the VO43- group to the Sm3+ ions was studied and its efficiency was proved to be 84.1% for an Sm3+ ion content of 7 mol%. Based on the disparate thermal quenching performances of the VO43- group and Sm3+ ions, the temperature monitoring ability of the prepared compounds was examined. Through choosing different emissions of Sm3+ ions, and then combining them with the VO43- group, optical thermometers with controllable sensitivity were realized. The maximum absolute and relative sensitivities of the resultant phosphors could reach ultra-high values of 1.076 K-1 and 6.167% K-1, respectively, which were the highest sensitivities reported so far. Furthermore, the doping content also impacted the sensitivities of the resultant compounds.

References

Jul 14, 2018·Nature Communications·Ming XuFuyou Li
Jun 18, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Peixin YangXianju Zhou
Jan 10, 2020·Inorganic Chemistry·Yibo ChenZhao-Qing Liu

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Citations

Jul 2, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Dagmara StefańskaPrzemysław J Dereń

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Methods Mentioned

BETA
X-ray

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