Investigation of physical, structural, optical, and luminescence properties of nickel oxide doped alkali zinco-borate glasses

Vinay D ¹, Devaraja C ², R S Gedam ³

⁰Department of Physics, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.

Scientific Reports +

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February 28, 2025

View abstract on PubMed

Summary

This study synthesized nickel oxide (NiO) doped borate glasses using melt quenching. Increased NiO concentration enhanced glass network compactness and resulted in green light emission, making them suitable for optoelectronic applications.

Area Of Science

Materials Science
Solid State Chemistry
Optoelectronics

Background

Borate glasses are versatile materials with tunable optical and physical properties.
Incorporating transition metal oxides like NiO can significantly modify glass characteristics.
Understanding these modifications is crucial for developing advanced functional materials.

Purpose Of The Study

To synthesize and characterize novel borate glasses doped with varying concentrations of nickel oxide (NiO).
To investigate the structural, optical, and photoluminescent properties of these NiO-doped glasses.
To evaluate their potential for optoelectronic applications.

Main Methods

Melt quenching technique for glass synthesis.
X-ray diffraction (XRD) for structural analysis.
Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) for morphology and elemental composition.
Fourier Transform Infrared (FTIR) and Raman spectroscopy for structural elucidation.
UV-Visible and photoluminescence spectroscopy for optical properties.
Calculation of various physical parameters like density, ion concentration, and bandgap.

Main Results

XRD confirmed the amorphous nature of the synthesized glasses.
Increased NiO concentration led to a conversion of BO3 to BO4 units and enhanced glass network compactness (decreased Urbach energy).
UV-Visible spectroscopy revealed characteristic Ni2+ transitions, with a decrease in direct bandgap and an increase in indirect bandgap.
Photoluminescence spectra showed strong green and cyan emissions, suitable for optoelectronic devices.
Calculated physical parameters provided insights into the glass network structure and properties.

Conclusions

The synthesized BZNNi glasses exhibit promising optical properties due to NiO incorporation.
The observed green light emission makes these glasses suitable candidates for optoelectronic applications.
Further research can explore optimizing compositions for specific device requirements.

Keywords:

Borate glasses CIE chromaticity Deconvolution Numerical aperture Optical basicity Photoluminescence

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