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.
