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A growing need for eco-friendly energy sources have led recently to a frantic search of new compositional systems for photovoltaic applications. The nanocomposite titania-germanium (TiO2-Ge) systems represent a new viable family of optoelectronic materials. Their structural, optical and electronic properties can be easily tailored by customizing the density and size of Ge dots in the TiO2 matrix....
GeSiO nanosystems were obtained using two different preparation methods, sol-gel and magnetron-sputtering. Transmission electron microscopy measurements were performed to investigate the films structure. Amorphous and crystalline Ge dots embedded in amorphous silicon dioxide were observed. The Ge concentration in the GeSiO films was by Energy-dispersive X-ray spectroscopy.
We studied the Auger electron emission induced by energetic (600 and 900 eV) atoms bombardment in oblique incidence on Si films from submonolayer to 4 monolayers (ML) thickness. Atomic and bulk contributions to the Si Auger emission were separately determined, and show a different trend versus film thickness. We ascribe these differences to the interplay between processes (different mechanisms of...
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