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Exact optical analysis of transparent-conductive-oxide (TCO) thin films are necessary to optimize adequate materials for optical sensor and solar cell applications. A non-numerical theoretical concept has been used to extract approximation-free optical, structural and electrical data from ultraviolet/visible/near-infrared (UV/Vis/NIR) spectra. Special focus has been set on double-layer systems, as...
Multi-layered Al:ZnO thin films, with wurtzite - type structure and thickness up to 120 nm, as determined by x-ray diffraction and HRTEM, were grown on Si-SiO2 and glass substrates by the sol-gel method. Fluorescence spectroscopy measurements show that 0.5 at.% Al doping determines a blue shift of the emission band observed at 387nm in the undoped material. The room temperature conductivity increases...
Using the magnetron sputtering technology, high quality Al2O3-based textured ZnO thin films (Al2O3/ZnO) which can be applied to solar cells' light trapping effect were fabricated by controlling the preparation parameters properly. X-ray diffraction (XRD) and Scanning electron microscopy (SEM) results show that O2 /(Ar+O2) flow ratio has great influence on Al2O3/ZnO films surface morphology during...
ZnO thin films have been deposited on (0001) sapphire substrates using potassium (K) as a dopant by radio frequency magnetron sputtering technique. The electrical properties, crystallinity and surface morphology of as-grown ZnO films are investigated by Hall measurement, X-ray diffraction and atom force microscopy. Results show that the structure and electrical properties of p-K:ZnO films are strongly...
Successive ionic layer adsorption and reaction technique (SILAR) and solution growth technique have been applied to deposit thin films on amorphous glass substrates. Various parameters, like concentration of complexing agent, pH of the solution, deposition temperature, time, have been optimized to achieve good quality films. Films grown by SILAR method have been found to be non-uniform as confirmed...
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