Abstract
The Cd10-x Cu (x) ZnO films were prepared for various x = 0.25, 0.50, 0.75 and 1.0 by sol-gel method. The structural and surface morphology of the films was investigated by XRD and atomic force microscopy. The results indicate that the crystallinity of the films is improved with Cu doping. The maximum crystallite size was 23 nm and minimum dislocation density 1.890 x 10(13) lines/m(2). The study of optical properties revealed that optical band gap firstly decreases with doping and then increase with further increase in doping. The obtained results indicate that the structural and optical properties of Cd10-x Cu (x) ZnO composite films are controlled with Cd/Cu ratio.
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