Highly Sensitive Dual-Mode Optical Thermometry in Double-Perovskite Oxides via Pr3+/Dy3+ Energy Transfer

Hang Zhang; Yujun Liang; Hang Yang; Shiqi Liu; Haoran Li; Yuming Gong; Yongjun Chen; Guogang Li

doi:10.1021/acs.inorgchem.0c02118

Highly Sensitive Dual-Mode Optical Thermometry in Double-Perovskite Oxides via Pr³⁺/Dy³⁺ Energy Transfer

Inorg Chem. 2020 Oct 5;59(19):14337-14346. doi: 10.1021/acs.inorgchem.0c02118. Epub 2020 Sep 17.

Authors

Hang Zhang¹, Yujun Liang¹, Hang Yang¹, Shiqi Liu¹, Haoran Li¹, Yuming Gong¹, Yongjun Chen², Guogang Li¹

Affiliations

¹ Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan, Hubei 430074, P. R. China.
² State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, China.

PMID: 32940038
DOI: 10.1021/acs.inorgchem.0c02118

Abstract

As increasing demand for noncontact temperature sensing, the development of a high-performance optical thermometer probe is more and more urgent. In this work, an efficient dual-mode optical thermometry strategy based on the Pr³⁺/Dy³⁺ energy transfer (ET) in some typical double-perovskite oxides is presented, which offers a promising way to design FIR/lifetime dual-mode optical thermometry with excellent temperature-measuring sensitivity and signal discrimination. According to this strategy, double-perovskite La₂MgTiO₆:Pr³⁺/Dy³⁺ phosphors are successfully synthesized. On the basis of diverse thermal responses between Pr³⁺ and Dy³⁺, the FIR of Pr³⁺ to Dy³⁺ (four FIR mode) in this material displays outstanding optical thermometry performance from 298 to 548 K. The maximum absolute and relative sensitivities (S_a and S_r) of mode 1 are 0.09 and 2.357% K^-1, being better than the current optical temperature measurement materials. For the fluorescence lifetime mode, the S_a-max and S_r-max values reach 2.85 × s 10^-4 and 1.814% K^-1. Furthermore, the dual-mode optical thermometry mechanism was presented and studied. It also demonstrated excellent optical thermometry performance in the other Pr³⁺/Dy³⁺ codoped double-perovskite oxides, such as LaMg_0.598Nb_0.402O₃, NaLa(MoO₄)₂, NaGd(MoO₄)₂, and NaLa(WO₄)₂, proving the universality of the presented strategy. This article presents an effective Pr³⁺/Dy³⁺ ET pathway for developing new and highly sensitive FIR/lifetime dual-mode optical temperature sensing materials.