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- Title
Optical thermometry based on the stark sub-levels of Er<sup>3+</sup> in Y<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub>: Yb<sup>3+</sup>, Er<sup>3+</sup> particles synthesized by sol–gel method.
- Authors
Wang, Yubin; Liu, Zhanhui; Liu, Haiqing; Chen, Siyu; Miao, Juhong; Rao, Wei-feng
- Abstract
To settle the challenges of both excellent luminescent property and high sensitivity for optical thermometry, a series of Y2Mo3O12: Yb3+, Er3+ submicron particles with different Yb3+ contents were prepared via a citric-assisted sol–gel technique. Under 980 nm excitation, the samples exhibit characteristic emissions ascribed to the transitions of 2H11/2 and 4S3/2 levels to the ground state of Er3+ ion. The Stark splitting of 4S3/2 and 2H11/2 is observed. According to the emission spectra, the optimal doping concentration of Yb3+ and Er3+ is concluded to be 15 mol% and 1 mol%, respectively. Then, the temperature-dependent luminescent behavior of Y2Mo3O12: 15%Yb3+, 1%Er3+ sample was further investigated, which exhibits good temperature stability with a slight decrease as temperature rises. Based on the fluorescence intensity ratio technique, the maximal absolute sensitivity SA of 0.0243 K−1 and relative sensitivity SR of 1.161%K−1 were achieved using the Stark sub-levels (IH/IS2), which are 1.75 and 1.07 folds than that of the traditional thermal-coupled levels (IH/IS1+S2) of Er3+ ion. The results show that the Stark sub-levels can be utilized as an effect strategy to improve thermometry sensitivity and Y2Mo3O12: Yb3+, Er3+ phosphor could be considered as a promising temperature sensing material.
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 15, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-12804-0