Experimental investigation of structural, surface, optical and electrical properties of gallium sesquioxide doped tausonite compounds

•We report that 1 and 3%wt concentration of gallium sesquioxide (Ga2O3) doped tausonite (SrTiO3) compounds were made by mechanochemical synthesis followed by the calcination method.•The lattice parameter values of the Ga2O3 doped SrTiO3 samples were examined using the XRD and W-H plot.•The chemical elements and chemical states of the prepared compound were tested by Raman, FT-IR, EDX and XPS studies.•The optical spectra displayed that the absorption wavelength shifts near the red shift on increasing the Ga2O3 doped SrTiO3.•The dielectric and electrical conductivity responses of the 1% and 3 wt % Ga2O3 doped SrTiO3 materials were investigated through the dielectric and electrical studies. We report that 1% and 3% wt concentration of gallium sesquioxide (Ga2O3) doped tausonite (SrTiO3) compounds have been developed by mechanochemical synthesis followed by calcination process and their microstructural, spectral and opto-electrical characterization are discussed for the first time. The lattice parameter values of the Ga2O3 doped SrTiO3 samples were examined using the X- ray Diffraction (XRD) and Williamson-Hall (W-H) plot. The cubic structure of SrTiO3 is confirmed by the XRD and Raman studies. The Field Effect-Scanning Electron Microscopy (FE-SEM) images of the Ga2O3 doped SrTiO3 samples were composed of spherical particles with agglomeration throughout the surface. The chemical elements and chemical states of the prepared compound have been tested in the Fourier Transform Infrared (FT-IR), Energy Dispersive X-ray (EDX) and X-ray Photoelectron Spectroscopy (XPS) studies. The optical spectra displayed that the absorption wavelength shifted near the red shift with the increase of the Ga2O3 doped SrTiO3. The dielectric and electrical conductivity responses of the 1% and 3 wt % Ga2O3 doped SrTiO3 materials were investigated in the dielectric and electrical studies. [Display omitted]