Difference Between Semiconductor Silicon Wafer And Photovoltaic Silicon Wafer

Semiconductor silicon wafers, because semiconductor silicon wafers are round, so semiconductor silicon wafers are also called "silicon wafers" or "wafers". The wafer is the "substrate" of chip manufacturing, and all chips are manufactured on this "substrate".
Photovoltaic silicon wafers are high-purity sheet-shaped silicon formed by slicing, polishing, and cleaning silicon rods. Semiconductor; doped with a small amount of group VA elements (phosphorus), N-type silicon semiconductor can be formed; N-type and P-type semiconductors can be combined to make crystalline silicon photovoltaic cells, which convert the sun's radiation energy into electrical energy. Photovoltaic monocrystalline silicon wafers are divided into two types: monocrystalline silicon and polycrystalline silicon, of which polycrystalline silicon accounts for about 60%.
What are the main differences between semiconductor silicon wafers and photovoltaic silicon wafers?
Semiconductor silicon wafers have higher requirements than photovoltaic silicon wafers. The silicon wafers used in the semiconductor industry are all monocrystalline silicon, the purpose is to ensure the same electrical characteristics at each position of the silicon wafer. In terms of shape and size, monocrystalline silicon wafers for photovoltaics are square, mainly with side lengths of 125mm, 150mm, and 156mm. The monocrystalline silicon wafers for semiconductors are round, and the diameters of silicon wafers are 150mm (6-inch wafer), 200mm (8-inch wafer) and 300mm (12-inch wafer). In terms of purity, the purity of monocrystalline silicon wafers for photovoltaics requires that the silicon content be between 4N-6N (99.99%-99.9999%), but that of monocrystalline silicon wafers for semiconductors is around 9N (99.9999999%)-11N (99.999999999%). The purity requirement is at least 1000 times that of photovoltaic monocrystalline silicon wafers. In terms of appearance, the flatness, smoothness and cleanliness of the surface of silicon wafers for semiconductors are higher than those for photovoltaic silicon wafers. Purity is the biggest difference between single crystal silicon wafers for photovoltaics and single crystal silicon wafers for semiconductors.