【Others Papers】Structural, elastic, luminescence, electrical and first principles analysis of green synthesized β-Ga₂O₃ nanoparticles

      Researchers from the Vidyavardhaka College of Engineering have published a dissertation titled "Structural, elastic, luminescence, electrical and first principles analysis of green synthesized β-Ga₂O₃ nanoparticles" in Materials Chemistry and Physics.

Abstract

      The wide band gap beta-gallium oxide nanoparticles (β-Ga₂O₃ NPs) were synthesized by the green combustion method using lemon juice as fuel. Several experimental methods, including X-ray diffraction (XRD), Electron microscopy, UV–visible (UV–Vis) spectroscopy, photoluminescence (PL) spectroscopy, and impedance spectroscopy, were used to evaluate the viability of these nanomaterials for use in electronic device applications. To comprehend the optoelectronic and elastic properties of Ga₂O₃ NPs, the density functional theory (DFT) method is also used. Band structure, density of states, refractive index, conductivity and dielectric functions are analysed. An XRD analysis using Rietveld refinement reveals that the prepared specimen is in the nanocrystalline phase and belongs to a monoclinic system. The prepared samples exhibit porous and agglomerated particle nature. Elastic analysis revealed an anisotropic behaviour and ductile nature of the prepared sample. UV–Vis analysis indicates that the prepared Ga₂O₃ NP has a large band gap (3.7 eV), with an absorption peak at 315 nm. Additionally, the refractive index (n), optical susceptibility (χ), and electronic polarizability (α) were determined. PL emission spectra of β-Ga₂O₃ NPs show a broad band from 400 nm to 600 nm, with a peak at 450 nm. This results in near-white light with a blue tint and a computed correlated colour temperature (CCT) of approximately 9236 K. Dielectric properties were also studied at different frequencies (50-5 MHz) and different temperatures (27–200 °C). Dielectric studies demonstrated the typical response to temperature and frequency, and AC conductivity analysis revealed Jonscher's power law behaviour. The computed and experimental results are in good agreement. The obtained results provide valuable insights into the various properties of Ga₂O₃ nanoparticles and their importance in electrical device applications.

DOI：

https://doi.org/10.1016/j.matchemphys.2025.131203