Structural and optical properties of Mg modified ZnO nanoparticles: An x-ray peak broadening analysis

Abstract The structural, microstructural, and optical properties of Mg-doped ZnO nanoparticles prepared via. thermal decomposition route. The Rietveld analysis was executed for a prepared sample, which revealed that the hexagonal wurtzite structure for all samples along with changes in lattice parameters and bond length. The various relevant parameters, such as strain, stress, and energy density, are analyzed using different improved forms of W-H equations via. a complete Willamson-Hall (W-H) method. Scanning electron microscopy (SEM) analysis resultant that the synthesized NP's are nearly spherical for Zn1-xMgxO, up to x = 0.08, and transform into a rectangular shape for x = 0.10. UV–Visible spectroscopy revealed an observation of fundamental absorption peak around 375 nm, which further shifted towards the higher wavelength, recommended the blue shift in the bandgap energy. The photoluminescence (PL) studies show a green emission band at 550 nm, demonstrating the occurrence of oxygen vacancy defects in the lattice of ZnO.