Photoluminescence and optical temperature measurement of Mn4+/Er3+ co-activated double perovskite phosphor through site-advantageous occupation

Yuhui Zhang; Ning Guo; Baiqi Shao; Jing Li; Ruizhuo Ouyang; Yuqing Miao

doi:10.1016/j.saa.2021.119797

Photoluminescence and optical temperature measurement of Mn⁴⁺/Er³⁺ co-activated double perovskite phosphor through site-advantageous occupation

Spectrochim Acta A Mol Biomol Spectrosc. 2021 Oct 5:259:119797. doi: 10.1016/j.saa.2021.119797. Epub 2021 Apr 9.

Authors

Yuhui Zhang¹, Ning Guo², Baiqi Shao³, Jing Li¹, Ruizhuo Ouyang¹, Yuqing Miao¹

Affiliations

¹ Department of Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
² Department of Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, PR China. Electronic address: guoning@usst.edu.cn.
³ State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.

PMID: 33984716
DOI: 10.1016/j.saa.2021.119797

Abstract

Because traditional methods based on thermal coupling energy level temperature measurement have large errors, a new temperature sensing strategy is proposed to attain strong sensitivity and excellent signal resolution ability. The rare-earth and also transition metal ions with poles apart thermal quenching channels are used as dual emission centers to find a suitable host to achieve high-efficiency dual-mode emission. In this work, a string of phosphors with NaLaMgWO₆ (NLMW) as the host, the single-doped and double-doped Mn⁴⁺ and Er³⁺ phosphors were adopted by the traditional high temperature solid-state reaction method. The crystallographic structure of the phosphor was analyzed by X-ray power diffraction and Rietveld refinement methods, and the results showed that a pure double perovskite phosphor with a monoclinic structure was successfully prepared. The photoluminescence excitation and emission spectrum properties, CIE chromaticity coordinates and photoluminescence spectra at different temperatures are detailed studied. Excited by ultraviolet light (300 nm), corresponding to the ⁴A₂→⁴T₁ transition of Mn⁴⁺ and the charge transfer from O^2- to W⁶⁺ of Er³⁺. There is no energy transfer between Mn⁴⁺ and Er³⁺. NLMW:Mn⁴⁺/Er³⁺ phosphors were especially sensitive to temperature changes within the scope of 303 K to 523 K. As the temperature increases, the fluorescence intensity of Mn⁴⁺ is thermally quenched faster than Er³⁺. The luminescent intensity ratio of Er³⁺ thermal coupling level and the FIR of Er³⁺/Mn⁴⁺ are used to study the temperature performance. The results show that the maximum relative sensitivity of FIR up to 1.31% K^-1, which is higher than the maximum temperature sensitivity based on the thermal coupling energy level, and which is beyond most of the non-contact temperature measurement materials previously reported, confirming that NLMW:Mn⁴⁺/Er³⁺ phosphors have application potential in non-contact temperature measurement.

Keywords: Er(3+); FIR; Mn(4+); Optical thermometry; Photoluminescence.