Structural and Optical Prperties of (ZnO/NiO) Thin Films Mixture
In this study, we prepared mixtures of nickel oxide (NiO) and zinc (ZnO) in different proportions as thin films on high-purity glass substrates, using pyrolysis spray technique. Where samples of mixtures were precipitated from two solutions of nickel nitrate (Ni(NO3)2 ·6H2O) and zinc acetate (C4 H6O4 Zn·2H2O) mixed in different proportions. Then the optical and structural properties of the prepared samples were studied. The transmittance decreases with the increase in the percentage of nickel oxide, which means that increasing the zinc oxide improves the transmittance in all the studied spectral fields. Samples with higher zinc oxide (ZnO) have two energy gaps. Scanning electron microscopy (SEM) showed that the surface morphology of the films has a relatively homogeneous composition. Where it was observed that increasing the proportion of zinc oxide leads to the appearance of zinc oxide granules clearly.
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