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Nanostructured Solar Cells and Photodetectors

We are studying a new photoconductive/photovoltaic cell fabrication approach for generating ordered arrays of inorganic photosensitive nanostructures with uniform feature sizes, and perform a systematic investigation of the geometrical effects including nanostructure shape, size, and alignment upon their optical absorption, photoconductive, and photovoltaic properties. Using this approach, we also plan to better understand the competing effects of improved photoconversion efficiencies due to the enhanced light absorption and shorter carrier collection lengths in nanostructured geometries, and reduced efficiencies due to the higher amount of surface recombination compared to within the conventional planar film geometries.