Method of producing silicon which can be used for semiconductor components, particularly solar cells

摘要

The invention relates to a method of producing silicon which can be used for semiconductor components, particularly solar cells, in which quartz which is reduced to silicon in an arc furnace by means of carbon in the form of coked or carbonised natural products is used as starting material. Only those natural products are used which contain B, P, Ga and Al in such small amounts that less than 5.10<17> atoms/cm<3> of B, less than 2.10<18> atoms/cm<3> of P, less than 5.10<18> atoms/cm<3> of Ga and less than 5.10<18> atoms/cm<3> of Al are contained in the molten Si formed in the arc furnace. <IMAGE>