{"title":"The optical temperature sensing based on FIR of YVO4: Bi3+, Sm3+ nanophosphors","authors":"Xinlin Li, Qingyu Meng, Wenjun Sun","doi":"10.1016/j.jlumin.2025.121491","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, a series of YVO<sub>4</sub>: Bi<sup>3+</sup>, Sm<sup>3+</sup> nanophosphors with varying dopant concentrations were synthesized via the hydrothermal method. A systematic study was conducted on their crystal structure, optical properties, and temperature-sensing properties. The experimental findings indicate that under 331 nm excitation, YVO<sub>4</sub>: Bi<sup>3+</sup>, Sm<sup>3+</sup> nanophosphors exhibit pronounced temperature-dependent luminescence. That is, the Bi<sup>3+</sup> luminescence has an obvious thermal quenching trend, whereas the thermal quenching of Sm<sup>3+</sup> luminescence is slower than that of Bi<sup>3+</sup>. Owing to the disparity in the thermal quenching tendency of the luminescence of these two ions, this difference becomes more pronounced as the temperature increases. Therefore, the fluorescence intensity ratio (FIR) of Sm<sup>3+</sup> and Bi<sup>3+</sup> can be used to characterize temperature and achieve a relatively high relative sensitivity (<em>S</em><sub><em>r</em></sub>). The nanophosphor synthesized in this study achieves a maximum <em>S</em><sub><em>r</em></sub> of 2.37 % K<sup>−1</sup> at 423 K (YVO<sub>4</sub>: 5 mol% Bi<sup>3+</sup>, 0.2 mol% Sm<sup>3+</sup>). Additionally, the luminescent colour of the nanophosphor changes from yellow-green to orange-red, with the rise of the temperature. This color change enables a rough estimation of the temperature. In conclusion, the YVO<sub>4</sub>: Bi<sup>3+</sup>, Sm<sup>3+</sup> nanophosphors demonstrate substantial potential for optical temperature-sensing applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"287 ","pages":"Article 121491"},"PeriodicalIF":3.6000,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Luminescence","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022231325004314","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, a series of YVO4: Bi3+, Sm3+ nanophosphors with varying dopant concentrations were synthesized via the hydrothermal method. A systematic study was conducted on their crystal structure, optical properties, and temperature-sensing properties. The experimental findings indicate that under 331 nm excitation, YVO4: Bi3+, Sm3+ nanophosphors exhibit pronounced temperature-dependent luminescence. That is, the Bi3+ luminescence has an obvious thermal quenching trend, whereas the thermal quenching of Sm3+ luminescence is slower than that of Bi3+. Owing to the disparity in the thermal quenching tendency of the luminescence of these two ions, this difference becomes more pronounced as the temperature increases. Therefore, the fluorescence intensity ratio (FIR) of Sm3+ and Bi3+ can be used to characterize temperature and achieve a relatively high relative sensitivity (Sr). The nanophosphor synthesized in this study achieves a maximum Sr of 2.37 % K−1 at 423 K (YVO4: 5 mol% Bi3+, 0.2 mol% Sm3+). Additionally, the luminescent colour of the nanophosphor changes from yellow-green to orange-red, with the rise of the temperature. This color change enables a rough estimation of the temperature. In conclusion, the YVO4: Bi3+, Sm3+ nanophosphors demonstrate substantial potential for optical temperature-sensing applications.
期刊介绍:
The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid.
We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.