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Optical and Electrical Properties of ZnO/CdO Composite Thin Films Prepared by Pulse Laser Deposition

ZnO/CdO composite films with different CdO contents are obtained by pulse laser deposition technique. The structural, optical and electrical properties of the composite films are investigated by x-ray diffraction, photolu-minescence and electrical resistivity measurements, respectively. The results show that the UV emission is at a constant peak position in the photoluminescence spectra. Meanwhile, their electrical resistivity decreases to very low level approaching to the value of the CdO film, which can be explained by the Matthiessen composite rule for resistivity. The peculiarity of low resistivity and high transmittance in the visible region enables these films suitable for optoelectronic device fabrication.