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STUDY OF DEPOSITION TEMPERATURE ON PROPERTIES OF AGED NANOSTRUCTURED NICKEL OXIDE FOR SOLAR CELLS

Nanostructured nickel oxide (NiO) films were deposited on preheated glass substrate using spray pyrolysis technique. This study examined the influence of deposition temperature on properties of aged nickel oxide thin films. A preferred orientation along the (1 1 1) plane was observed with a polycrystalline cubic structure. Films were formed with a stoichiometric ratio at higher deposition temperatures. It was revealed that the surface morphology and elemental composition of NiO films can be optimized by deposition temperature. The optical band gap grew as deposition temperature increased. Refractive index decreased with increasing deposition temperature. Optical band gap varied from 3.31 eV to 3.69 eV as deposition temperature increased. The deposition temperature has an influence on properties of aged NiO films. These results may be of interest in the development of affordable and efficient solar cell fabrication especially in developing countries.