The photovoltaic (PV) industry is growing rapidly in the recent years,so the demand for the low cost solar-grade (SoG) silicon increases dramatically.The research for preparation of solar-grade silicon has become a hot research area in different countries.The review is given for the current preparation methods of solar grade silicon.The problems such as high energy consumption and complex operation in the current preparation methods are pointed out.The mostly studied preparation methods,such as vacuum induc...
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