Refining Silicon for Solar Cell Application by Copper Alloying
Refining Silicon for Solar Cell Application by Copper Alloying
复制标题
DOI：
10.1007/s12633-009-9025-z
复制
发表时间：
2009-12
期刊：
影响因子：
3.4
通讯作者：
A. Mitrašinović;T. Utigard
中科院分区：
文献类型：
--
作者：
A. Mitrašinović;T. Utigard
前言光伏行业的一个主要问题是精炼的太阳能级硅的价格过高。研究了一种将冶金级硅精炼成太阳能级硅的新方法。方法主要包括铜合金化、凝固、研磨和重力分离。结果金相研究表明，只有两种显微成分存在，主要是纯硅树枝晶和Cu3Si金属间化合物。化学分析表明，Cu3Si金属间化合物中的杂质含量比纯硅中高出数倍，精制硅中9种元素的含量也降低到了电感耦合等离子体检测限以下。
IntroductionOne major problem in the photovoltaic industry is the high price of refined solar grade silicon. In this research, a new method for refining metallurgical grade silicon to solar grade silicon is investigated.MethodsThe main steps include alloying with copper, solidification, grinding and gravity separation.ResultsA metallography study showed the presence of only two microconstituents, mainly pure silicon dendrites and Cu3Si intermetallic. Chemical analysis revealed a several times higher impurity level in the Cu3Si intermetallic than in the pure silicon; furthermore, the amount of nine elements in the refined silicon is reduced below the ICP detection limit.DiscussionThe acquired results showed that the suggested method is efficient in removing impurities from the metallurgical grade silicon with great potential for further development.