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Er 3 + , Nd 3 + , Tm 3 + : Up-conversion in Lead Borophosphate Glasses for Visible Emission.

Harpreet Singh1, Devinder Singh2, Supreet Pal Singh3

  • 1Department of Physics, Punjabi University Patiala, (147002), Punjab, India.

Journal of Fluorescence
|August 21, 2024
PubMed
Summary
This summary is machine-generated.

Lithium lead borophosphate glasses doped with rare earth elements exhibit enhanced up-conversion properties. These glasses show potential as efficient hosts for up-conversion processes, with applications in optical materials.

Keywords:
FTIRLead Borophosphate glassesPhotoluminescence spectroscopyRE doped glassesUV-Vis-NIR spectroscopyUp-conversionX-ray diffraction

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Spectroscopy

Background:

  • Lithium lead borophosphate glasses are investigated for their physical, structural, and optical properties.
  • The role of lead oxide (PbO) as a former or modifier is explored, along with compositional variations.

Purpose of the Study:

  • To synthesize and characterize lithium lead borophosphate glasses.
  • To investigate the effect of lead oxide concentration on glass properties.
  • To study the up-conversion properties of rare earth-doped glasses.

Main Methods:

  • Melt quenching technique for glass synthesis.
  • Archimedes principle for density measurement.
  • X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) for structural analysis.
  • UV-Vis absorption spectroscopy for optical properties.
  • UV-Vis-NIR spectroscopy for up-conversion studies.

Main Results:

  • Density increased from 3.13 to 4.51 g/cm³ with increasing PbO concentration.
  • XRD confirmed the non-crystalline nature of the glasses.
  • FTIR identified structural units including PbO, BO3, and BO4.
  • Indirect band gap increased from 4.80 eV to 4.90 eV.
  • Rare earth-doped glasses exhibited up-conversion luminescence upon 980 nm excitation, with specific emission peaks for Er³⁺, Nd³⁺, and Tm³⁺.

Conclusions:

  • Lithium lead borophosphate glasses demonstrate tunable physical and optical properties with varying PbO content.
  • The glasses are effective hosts for rare earth ions, facilitating efficient up-conversion luminescence.
  • These materials show promise for applications requiring up-conversion phenomena.