On the order of a few nanometers, silicon shows new properties. What is special about nanocrystalline silicon is the occurrence of quantum effects. In this diploma thesis it was examined whether certain nanostructures, such as a superlattice with silicon nanocrystals, are suitable for photovoltaics or whether quantum effects could be used for energy conversion. For this purpose, nine different solar cells with quartz glass (as a non-photoactive substrate) were produced in order to make the photovoltaic effect of nanostructures accessible...