Method for producing high-purity silicon, high-purity silicon obtained by this method, and silicon raw material for producing high-purity silicon

摘要

Production of high-purity silicon that can be manufactured easily at low cost and industrially easily by high-purity silicon suitable for applications such as solar cell production due to unidirectional solidification of molten silicon. The present invention provides a method, high-purity silicon obtained by this method, and a silicon raw material for producing high-purity silicon. When producing high-purity silicon by unidirectionally solidifying molten silicon as a raw material in a mold container, high-purity silicon using molten silicon having a carbon content of 100 to 1000 ppmw and a germanium content of 0.5 to 2000 ppmw is used as the raw material. It is a manufacturing method, and high-purity silicon obtained by this method and a silicon raw material for manufacturing high-purity silicon.