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Öğe Bandgap variation of nanostructure tin doped CdO films via SILAR processing(Elsevier Sci Ltd, 2014) Sahin, B.; Taskopru, T.; Bayansal, F.Five series of pure and tin-doped CdO films have been grown on amorphous glass substrates by the successive ionic layer adsorption and reaction (SILAR) method. The film's structural, morphological and optical properties have been investigated by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) and UV-vis spectrophotometer. XRD results showed that all of the films are polycrystalline cubic CdO. Doping of tin enhances the film's (111) preferred orientation and causes slight shift in the (111) Bragg angle towards higher value. From the FESEM images, it was seen that tin-doping concentration affects the shapes of the nanostructures. It was found that the tin-doping concentration modify the microstructures. With UV-vis analysis at the room temperature it was seen that the optical band gap and transmission properties of the films change with increasing tin concentration in the growth bath. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.Öğe Structural and optical properties of Co-doped NiO films prepared by SILAR method(Taylor & Francis Ltd, 2015) Taskopru, T.; Bayansal, F.; Sahin, B.; Zor, M.In this study, transparent thin films of un-doped and Co-doped nickel oxide were deposited onto microscopic glass substrates using the successive ionic layer adsorption and reaction (SILAR) method. The effect of cobalt doping on structural, morphological and optical properties was investigated. XRD studies reveal that all the films are polycrystalline with cubic structure and exhibit (1 1 1) and (2 2 2) preferential orientations. Co is well incorporated in the host lattice without altering the structure. All films retain high transparency throughout the visible spectral regime. No significant shift in Raman spectra was observed due to the Co doping.