Study of Optical, Morphological and Structural Properties of Mg Doped ZnO Nanoparticles Prepared by Coprecipitation Method

Abstract

Zinc oxides (ZnO) are commonly employed as semiconductor variables in solar fusion due to their large bandgap. This dissertation includes the preparation of undoped ZnO and Mg doped ZnO (MZO) nanoparticles using coprecipitation method. Different concentration of Mg (2%, 4%) wt. ratios were used to dope with bare ZnO. Structural, morphological, and optical properties were studied using Raman spectroscopy, Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and UV-Vis spectroscopy. Raman spectroscopy was used to detect the electron-phonon interaction in ZnO. The FTIR spectra revealed several peaks, each of which corresponded to a different functional group. The field emission scanning electron microscopy used to study the surface morphology and particle size of the prepared nanostructures. The average size of the undoped ZnO nanoparticle was 110 nm, while the 2% MZO and 4% MZO the sizes are 125 nm and 150 nm respectively. Increasing of Mg concentration resulted in increased particle size. UV- Visible spectroscopy was utilized to assess the absorbance and bandgap of doped and Mg doped ZnO nanoparticles. In case of 4% MZO doping the higher absorption (5.66) found with band gap of 3.320 eV. Raman analysis verified phase segregation due to the significant E2 mode. It is a promising option for optoelectronics, spintronics, and solar cells since it can be doped to close the band gap. “