What will evolve from this multitude is the question. Amorphous-silicon is a collective name for cells in which a thin layer of silicon is sprayed on a carrier of for example glass or metal. By bringing silicon on a transparent carrier using patterns part of the light is passed through. The cost of sun panels is expressed in guilders per watt. According to this criterion the crystalline cells are for the time being in the lead.
Crystalline cells consist of silicon-wafers covered by glass or plastics.
The tiles of ca. 100x100mm are combined into PV-panels. The proceeds of amorphous systems are now still considerably less than that of crystalline. But because of the much simpler production method this system is expected to be competitive within a few years. Encouraging for designers because this system is much more flexible than the stiff crystalline tiles, which are often only available in bright blue.