Optical Temperature-Sensing Performance of La2Ce2O7:Ho3+ Yb3+ Powders

Jiameng Chao; Hui Lin; Dechao Yu; Ruijin Hong; Zhaoxia Han; Chunxian Tao; Dawei Zhang

doi:10.3390/ma17071692

Optical Temperature-Sensing Performance of La₂Ce₂O₇:Ho³⁺ Yb³⁺ Powders

Materials (Basel). 2024 Apr 7;17(7):1692. doi: 10.3390/ma17071692.

Authors

Jiameng Chao¹, Hui Lin¹, Dechao Yu¹, Ruijin Hong¹, Zhaoxia Han¹, Chunxian Tao¹, Dawei Zhang¹

Affiliation

¹ Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China.

Abstract

In this paper, La₂Ce₂O₇ powders co-activated by Ho³⁺ and Yb³⁺ were synthesized by a high temperature solid-state reaction. Both Ho³⁺ and Yb³⁺ substitute the La³⁺ sites in the La₂Ce₂O₇ lattice, where the Ho³⁺ concentration is 0.5 at.% and the Yb³⁺ concentration varies in the range of 10~18% at.%. Pumped by a 980 nm laser, the up-conversion (UC) green emission peak at 547 nm and the red emission at 661 nm were detected. When the doping concentration of Ho³⁺ and Yb³⁺ are 0.5 at.% and 14% at.%, respectively, the UC emission reaches the strongest intensity. The temperature-sensing performance of La₂Ce₂O₇:Ho³⁺ with Yb³⁺ was studied in the temperature range of 303-483 K, where the highest relative sensitivity (S_r) is 0.0129 K^-1 at 483 K. The results show that the powder La₂Ce₂O₇:Ho³⁺, Yb³⁺ can be a potential candidate for remote temperature sensors.

Keywords: energy transfer; optical temperature sensing; pyrochlore structure; up-conversion emission.

Abstract

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