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Photoluminescence: Applications01:14

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
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Dual-Phase Glass Ceramic: Structure, Dual-Modal Luminescence, and Temperature Sensing Behaviors.

Daqin Chen1, Zhongyi Wan1, Yang Zhou1

  • 1College of Materials & Environmental Engineering, Hangzhou Dianzi University , Hangzhou 310018, P. R. China.

ACS Applied Materials & Interfaces
|August 20, 2015
PubMed
Summary

This study developed a novel glass ceramic for optical thermometry, achieving high temperature sensitivity using spatially separated Ytterbium (Yb3+)/Erbium (Er3+) and Chromium (Cr3+) ions. This material enables precise temperature measurements with advanced luminescence properties.

Keywords:
glass ceramiclanthanidenanocrystaltemperature sensingupconversion

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Spectroscopy

Background:

  • Development of advanced materials for high-resolution optical thermometry is crucial for precise temperature measurements.
  • Controlling ion distribution in glass ceramics can mitigate luminescence quenching and enhance sensing capabilities.

Purpose of the Study:

  • To fabricate a triply doped transparent glass ceramic for optical thermometry.
  • To investigate the spatial distribution of Ytterbium (Yb3+)/Erbium (Er3+) and Chromium (Cr3+) ions and its effect on luminescence.
  • To evaluate the material's performance in temperature sensing applications.

Main Methods:

  • Fabrication of Yb(3+)/Er(3+)/Cr(3+) triply doped glass ceramic using a melt-quenching route.
  • Characterization of nanocrystal formation (YF3 and Ga2O3) and ion incorporation.
  • Analysis of luminescence properties (anti-Stokes and Stokes) and temperature-dependent behavior.

Main Results:

  • Yb(3+)/Er(3+) ions were incorporated into YF3 nanophase, while Cr(3+) ions partitioned into Ga2O3 nanophase, enabling spatial isolation.
  • Simultaneous intense green anti-Stokes and deep-red Stokes luminescence were achieved.
  • High temperature sensitivities of 0.25% K(-1) for Er(3+) at 514 K and 0.59% K(-1) for Cr(3+) at 386 K were demonstrated.

Conclusions:

  • The spatial isolation strategy effectively suppressed energy transfer, leading to enhanced luminescence.
  • The developed glass ceramic exhibits excellent potential for high-resolution optical thermometry.
  • The material offers dual-mode temperature sensing capabilities based on Er(3+) and Cr(3+) luminescence.