SILICON PREPARATION METHOD AND PREPARATION APPARATUS, SILICON WAFER, AND SOLAR CELL PANEL

摘要

The present invention provides a silicon preparation method with which impurities such as boron (B), aluminum (Al), and calcium (Ca) can be removed from a metal silicon raw material rapidly and efficiently through the same process to obtain highly-pure metal silicon. The present invention relates to a silicon preparation method characterized in that molten silicon containing impurities is brought into contact with a molten salt, the molten salt including the impurities is evaporated to remove the impurities from the molten silicon, and the evaporated molten salt is condensed by a condensing means.