The optics of axial silicon nanowire solar cells is investigated and compared to silicon\nthin-film solar cells with textured contact layers. The quantum efficiency and short circuit current\ndensity are calculated taking a device geometry into account, which can be fabricated by using\nstandard semiconductor processing. The solar cells with textured absorber and textured contact\nlayers provide a gain of short circuit current density of 4.4 mA/cm2 and 6.1 mA/cm2 compared to a\nsolar cell on a flat substrate, respectively. The influence of the device dimensions on the quantum\nefficiency and short circuit current density will be discussed.
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