Fremgangsmåte og anordning for fremstilling av silisium av fotovoltaisk kvalitet

摘要

The present invention relates to a method for production of high purity silicon where a silane or a chlorosilane is supplied to one end of a cylinder-shaped pipe reactor which reactor is heated to a temperature above the dissociation temperature of the silane or chlorosilane and where the produced silicon is deposited on the inner walls of the cylinder. In the method it is used a cylinder-shaped pipe reactor made from a metal or an alloy having a higher melting point than silicon and which has a low solubility in solid silicon and where heat is supplied to the reactor by supply of electric energy to the cylinder. The invention further relates to an apparatus for carrying out the method.