硅系合金法近年来已成为冶金法提纯多晶硅的研究热点.大量研究表明,适合的硅系合金能使杂质在硅中的分凝系数大大降低.利用Si-Al合金,通过定向酸洗工艺所得到的多晶硅制成太阳电池其效率最高可达10.6％,在感应磁场下凝固能使Si有效分离,大大降低酸的用量.Si-Ga合金法制成的单晶硅锭,纯度可达5N,太阳能电池的效率也达到了15％,但成本较高.Si-Cu合金则具有容易分离的优点.同时介绍了其他硅系合金的研究进展.
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