Structural, optical and magnetic properties of nanoparticles of ZnO:Ni—DMS prepared by sol–gel method

摘要: Abstract Ni-doped ZnO nanoparticles having 0%, 2%, 4%, 6%, 8% and 10% of Ni are synthesized by means low temperature sol–gel (auto-combustion) method. The effects doping on the structural optical properties ZnO:Ni particles in powder sample investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visible spectroscopy photoluminescence (PL) spectroscopy. XRD analyses doped undoped samples reveal formation single phase, polycrystalline hexagonal-wurtzite structure. SEM images show clusters nanosizes some form thin rods. FTIR spectra confirm tetrahedral coordination oxygen ions surrounding zinc a shift frequency bands brings out ZnO. absorption position band edge towards lower energy. estimated gap is found to decrease with higher nickel doping. room PL measurements illustrate UV emission centered 392 nm (3.16 eV), which ascribed near-band-edge (NBE) emissions ZnO, violet at 411 nm (3.01 eV) blue 450 nm (2.75 eV). cause intensity these lines when content increased explained basis relative changes distribution radiative non-radiative defect sites as chooses its sites. exhibit ferromagnetic phase them.