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Youfusheng Wu1, Fengqin Lai2, Bin Liu2

  • 1School of Material Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, P. R. China. you_wx@126.com and Key Laboratory of Rare Earth Luminescence Materials and Devices of Jiangxi Province, Ganzhou 341000, P. R. China.

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Developing novel Er3+-doped upconversion materials is key for accurate temperature sensing. This study enhances sensitivity in NaLaMgWO6:Er,Mo, offering a promising strategy for advanced thermal detection.

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Luminescence

Background:

  • Upconversion (UC) materials doped with Er3+ are crucial for temperature detection, but their energy gap limits detection accuracy.
  • Enhancing the thermal sensitivity (SA value) of these materials is essential for practical applications.

Purpose of the Study:

  • To design a novel double perovskite NaLaMgWO6:Er,Mo system with improved temperature sensing performance.
  • To investigate the mechanism behind enhanced sensitivity based on host material thermal response.

Main Methods:

  • Synthesized NaLaMgWO6:Er,Mo double perovskite materials.
  • Characterized upconversion luminescence properties and temperature sensing parameters (SA and SR values).
  • Investigated the influence of host material properties on thermal response and emission intensities.

Main Results:

  • Achieved a maximum sensitivity (SA) of 275.4 × 10-4 K-1 at 323 K in the NaLaMgWO6:Er,Mo system, outperforming the NaLaMgWO6:Er3+ host.
  • Observed a monotonous decrease in the signal ratio (SR) with increasing temperature, linked to the energy gap.
  • Proposed and validated a mechanism involving differential host thermal response behaviors.

Conclusions:

  • The NaLaMgWO6:Er,Mo system demonstrates superior temperature sensing capabilities due to tailored host properties.
  • A host with high emission intensity for the 2H11/2 level and lower for the 4S3/2 level is ideal for temperature measurements.
  • This research provides a strategy for enhancing SA values and highlights the potential of NaLaMgWO6:Er,Mo for temperature detection.