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Li4SrCa(SiO4)2:Eu2+: A Potential Temperature Sensor with Unique Optical Thermometric Properties.

Rui Shi1, Lixin Ning2, Yan Huang3

  • 1MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, School of Chemistry , Sun Yat-sen University , Guangzhou 510275 , China.

ACS Applied Materials & Interfaces
|March 1, 2019
PubMed
Summary
This summary is machine-generated.

Europium-doped Li4SrCa(SiO4)2 exhibits temperature-dependent luminescence, making it a promising material for optical thermometry. Its unique properties were observed under UV illumination and thermal treatment.

Keywords:
Eu2+electron transferhigh sensitivityluminescence evolutionoptical thermometrytemperature sensor

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Luminescence

Background:

  • Lanthanide-activated phosphors are crucial for understanding structure-property relationships and advancing research techniques.
  • Optical thermometry requires materials with temperature-sensitive luminescence for accurate temperature measurements.

Purpose of the Study:

  • To investigate the luminescence properties of Eu2+-doped Li4SrCa(SiO4)2 as a potential optical thermometric material.
  • To explore the temperature-dependent emission intensities of Eu2+ ions at different sites (EuSr2+ and EuCa2+) within the crystal lattice.

Main Methods:

  • Synthesis and characterization of Eu2+-doped Li4SrCa(SiO4)2.
  • Measurement of luminescence spectra and intensities as a function of temperature.
  • Analysis of the temperature sensitivity of Eu2+ emission.

Main Results:

  • A novel evolution of Eu2+ luminescence was observed in the as-prepared sample under UV illumination and thermal treatment.
  • The material demonstrated distinct temperature sensitivities for EuSr2+ and EuCa2+ emissions.
  • Maximum relative sensitivities of 2.87% K-1 (at 440 K) and 1.51% K-1 (at 460 K) were achieved for the as-prepared and illuminated samples, respectively.

Conclusions:

  • Eu2+-doped Li4SrCa(SiO4)2 shows significant potential as an optical thermometric material due to its temperature-dependent luminescence.
  • The differential sensitivity of Eu2+ ions at different lattice sites offers a unique mechanism for optical thermometry.
  • Further research into this material could lead to advancements in non-contact temperature measurement technologies.