A linear calibrated high temperature sensor based on up-conversion fluorescence of Y2Mo3O12:Er3+,Yb3+ enhanced by negative thermal expansion

• Published in: Journal of luminescence Vol. 240; p. 118410
• Main Authors: Yang, Yuanming, Lin, Lin, Lu, Pan, Feng, Zhuohong, Li, Zheng, Cai, Jieyi, Mei, Zhiqiang, Huang, Yinghui, Guo, Wenti, Wang, Zhezhe, Zheng, Zhiqiang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2021
• Subjects: Linear calibration; Negative thermal expansion; Stark-splitting; Temperature sensor; Up-conversion fluorescence; Temperature sensor; Up-conversion fluorescence; Negative thermal expansion; Linear calibration; Stark-splitting
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2021.118410

The temperature sensing properties of the Y2Mo3O12:Er3+,Yb3+ phosphor are analyzed by using fluorescence intensity ratios (FIRs) of up-conversion (UC) emissions of Er3+ from room temperature to 753 K. The negative thermal expansion phenomenon is confirmed above 393 K in this phosphor, which results in great enhancement of UC emissions with high temperatures despite thermal quenching. Moreover, the FIRs of emission peaks derived from Stark-splitting sub-levels are applied to improve temperature sensing performance. In this way, the optimum of absolute and relative sensitivities reach 1.303*10−2 K−1 and 1.139%∙ K−1, respectively. In addition, each FIR of emission peaks has a linear relationship with temperature, which is simple and easy to be calibrated. •Negative thermal expansion enhanced emission is used for high-temperature sensing.•Sensing performance is improved by FIRs for Stark-splitting sublevels.•Each FIR linearly depends on temperature, simple and easy to be calibrated.