Refining method of Phosphorus and other impurities from MG-Si by acid leaching

摘要

for producing a silicon solar cell with MG-Si during acid leaching of impurities in the refining method is provided. The present invention relates to a process for refining the MG-Si of impurities, the acid solution, corrosion resistance strong pyrex beaker, carbon vessel, Al ₂ O ₃ vessel, Tefron MgO vessel and the vessel to provide a single vessel selected in the process; Non-corrosive to MG-Si silicon in the container HCl, HNO ₃ , H ₂ SO ₄ , and at least one acid selected from the HF supplying a process solution; The acid solution at a weight ratio of silicone with the acid solution within the supply container 1: a supplying step so as to satisfy the MG-Si 0.5-2; Of the acid leaching process, including using MG-Si; and a step for removing impurities in the ion state of the Si surface by the reaction of the acid solution and the Si and by maintaining a preset temperature and the time for the MG-Si within the vessel relates to a method of refining impurities. ;