This thesis investigates InGaAs-based nanowire heterostructures, directly integrated on silicon by molecular beam epitaxy. Systematically optimizing the growth parameter space yields highly periodic arrays with excellent morphology and large composition tunability. The impact of their considerable surface is studied in detail and its detrimental influence minimized by radial passivation with different materials. Finally, fabrication of first working solar-cell prototypes from such core-shell structures establishes the basis for novel opto-electronic devices.
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This thesis investigates InGaAs-based nanowire heterostructures, directly integrated on silicon by molecular beam epitaxy. Systematically optimizing the growth parameter space yields highly periodic arrays with excellent morphology and large composition tunability. The impact of their considerable surface is studied in detail and its detrimental influence minimized by radial passivation with different materials. Finally, fabrication of first working solar-cell prototypes from such core-shell str...
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