Optical properties of nanostructured Cd10−x Cu x ZnO composite films by sol–gel method
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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 × 1013 lines/m2. 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.
KeywordsCd10−xCuxZnO composite films Optical band gap Sol–gel method
This paper was funded by the Deanship of Scientific Research (DSR), King Abdulaziz University, Jeddah, under Grant No. (619-130-D1435). The authors, therefore, acknowledge with thanks DSR technical and financial support.