Making Crystalline Silicon


Silicon, in its natural state, is not pure; to be used as a solar conductor, it must be purified. Ironically, pure silicon does not conduct electricity very well (unlike more optimum but expensive conductors such as copper), so other chemical elements have to be introduced to promote better conductivity. The process of creating solar-grade silicon varies by manufacturer, but usually involves heating, growing, and “doping” mono-crystalline silicon “boules” or “ingots” in chemical reactors and furnaces. The reactors can generate several kilograms of silicon particles per week, so equipment must work reliably in dusty environments to provide liquids for filtration and polishing. This process can take anywhere from one week to one month, depending on many factors. The fully-grown ingot has a rounded shape.


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Mail: info@almatec.de