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Study of TiO2 nanotube arrays by simultaneous grazing incidence small and wide angle X-ray scattering

TiO2 is one of the most intensively investigated compounds in material science due to its essential properties. It is a wide band gap semiconductor having band-edge positions appropriate for solar cell applications and for hydrogen generation by water splitting. It is also known as a non-toxic, environment friendly, corrosion-resistant material. Nano-forms of TiO2 such as nanoparticles, nanorods, nanowires and, in particular nanotubes can be used as photo- electrode in dye sensitized solar cells. Conversion efficiency of solar cells can be significantly improved by using oriented nanorod- like materials on top of transparent conductive oxide. For this purpose we prepared TiO2 nanotube arrays by anodizing titanium thin film deposited on ZnO covered glass substrate. Initial Ti films were prepared by evaporation or magnetron sputtering. Diameter and length of nanotubes were controlled by parameters of anodizatio mainly voltage and etching time. The structural properties of obtained TiO2 nanotubes arrays were estimated upon simultaneous small and wide angle x-ray scattering under grazing incidence geometry. Results will be also correlated by deposition parameters and results obtained by high resolution electron microscopy, scanning electron microsopy and Raman spectroscopy. It will be also discussed possible application in photovoltaic devices.

TiO2 nanotubes arrays; Grazing Incidence Small Angle X-ray Scattering; Grazing Incidence Wide Angle X-ray Scattering

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