Investigation of structural and optical properties of MnxMg1-xO(x = 0.00, 0.03, 0.07) nanoparticles prepared by wet chemical technique

Abstract

Magnesium oxide (MgO) and manganese substituted MgO nanoparticles were synthesized using wet chemical method. Structural and optical properties of all prepared samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, UV-Vis spectroscopy and photoluminescence (PL) techniques. XRD and FTIR studies revealed the formation of single crystalline face-centered cubic (FCC) crystal structure with space group Fm-3m. Variation in lattice parameters has been observed with Mn substitution into MgO nanoparticles at different concentrations. Red shift has been demonstrated in UV-Vis spectra and optical band gap energy (Eg) determined from Tauc's plot was found to be decreasing with the increase of Mn content into MgO nanoparticles. Formation of defect states in the forbidden gap was confirmed by photoluminescence (PL) spectra.