MULTICRYSTALLINE SILICON BRICK AND SILICON WAFER THEREFROM

摘要

Present disclosure provides a multicrystalline silicon (mc-Si) brick, including a bottom portion starting from a bottom to a height of 100 mm, a middle portion starting from the height of 100 mm to a height of 200 mm; and a top portion starting from the height of 200 mm to a top. A percentage of incoherent grain boundary in the bottom portion is greater than a percentage of incoherent grain boundary in the top portion. Present disclosure also provides a multicrystalline silicon (mc-Si) wafer. The mc-Si wafer includes a percentage of non-Σ grain boundary from about 60 to about 75 and a percentage of Σ3 grain boundary from about 12 to about 25.