CHARACTERISTICS OF NANOSTRUCTURED CdO FILMS PREPARED BY CHEMICAL BATH DEPOSITION TECHNIQUE
Abstract
Nanostructured CdO films were prepared by chemical bath deposition (CBD) technique. Cadmium nitrate salt was used as a source of cadmium ions (Cd+2). The effect of solution molarity on the structural, morphological, optical and electrical properties of nanostructured CdO films had been investigated. To obtain a good film stoichiometry, films were heated in a static air temperature of 673 K for 90 min. X-ray diffraction results showed the formation of polycrystalline cadmium oxide structure. The average grain size and root mean square of roughness values obtained from AFM investigation were 87 nm and 13 nm respectively for CdO film prepared with 0.03 M and 98 nm and 17 nm respectively for CdO film prepared with 0.1 M. The average transmittance of CdO films in the visible region was between 70–80% with a corresponding direct optical energy of 2.41–2.5 eV. The electrical resistivity of nanostructured CdO films at temperatures 300–500 K was measured.
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