PREPARATION AND DETERMINATION OF OPTICAL PROPERTIES OF NiO THIN FILMS DEPOSITED BY DIP COATING TECHNIQUE
F. E. GHODSI
S. A. KHAYATIYAN
The NiO thin films were prepared from NiCl2 Â· 6H2O precursor by using solâgel route. The films were deposited on a glass substrate using dip-coating technique. The optical and structural properties of the NiO thin films were investigated with respect to dipping rate, number of layers, and annealing temperature. The microstructure of NiO thin films and powder were examined by X-ray diffraction (XRD). Various diffraction peaks of NiO powder were observed in the XRD pattern. The morphology of the films was studied by using scanning electron microscopy (SEM). The optical characteristics of the samples were determined by using UVâvisible spectrophotometer. The results show that the NiO thin films are transparent in the visible range. Optical constants (refractive index, extinction coefficientâ¦) were changed by varying dipping rate, number of layers, and annealing temperature.
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