Abstract
Undoped and cobalt doped nickel oxide thin films (Co:NiO) at different doping concentrations were deposited on a glass substrate at constant substrate temperature by spray pyrolysis. The doping percentage increased from 0 to 10% and the effects of doping content on structural, morphological and optical properties were explored by X-ray diffraction, atomic force microscopy and UV–visible spectroscopy, respectively. X-ray diffraction configurations proved the NiO thin films were polycrystalline in nature having a cubic crystal structure. The regularly used parameters such as crystallite size, micro-strain, dislocation density and texture coefficient are presented from structural data. The average crystallite size is found between 10 and 14 nm with cobalt doping (Co) concentration. The band gap energies were increased with the effect of Co doping concentration in the range between 2.10 and 2.50 eV. The various optical constants as a function of photon energy are modified with Co doping concentration.
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