SILICON FOR SOLAR CELL, POLYCRYSTALLINE SILICON MATERIAL, POLYCRYSTALLINE SILICON SOLAR CELL, AND METHOD FOR PRODUCING SILICON FOR SOLAR CELL

摘要

Provided are the following: a silicon for a solar cell, the silicon having a boron concentration of 0.04 ppmw to 0.32 ppmw, inclusive, a phosphorus concentration of 0.06 ppmw to 0.4 ppmw, inclusive, and an aluminum concentration of 1.2 ppmw to 4.5 ppmw, inclusive; a polycrystalline silicon material produced using the silicon; a polycrystalline silicon solar cell; and a method for producing the silicon for a solar cell.