冶金法制备太阳能级多晶硅的原理与生产工艺研究进展

随着硅集成电路和器件以及太阳能电池产业的快速发展,导致了高纯多晶硅的严重脱销和价格暴涨,制约了光伏发电产业的发展.由于硅材料的成本约占太阳能电池总成本的50%左右,所以低成本提纯冶金硅至太阳能级硅工艺技术越来越受到广泛重视,成为研究开发热点.分析了全球光伏产业的发展现状和趋势,重点阐述了冶金法制备太阳能级多晶硅的原理,分析比较了几种典型低成本生产太阳能级多晶硅的技术工艺,并指出未来冶金法的发展趋势.

Research Advance on the Principle and Processing Technology for Preparing Solar Grade Silicon by Metallurgic Method

The rapid development of the silicon integrated circuits,devices and solar battery industry results in the high-purity polycrystalline silicon being out of stock seriously and its price rising suddenly,which restricts photovoltaic power generation industry′s development.Because the silicon material cost approximately accounts for 50% of the solar cell total cost,the technology of purifying metallurgical grade silicon to solar grade silicon with low cost receives more and more attention,becoming the research and development focus.The developing status and trend of the global photovoltaic industry were analyzed and the principle for preparing solar grade silicon by metallurgic method was emphasized in this paper.Also,some kinds of typical processing technologies for producing solar grade silicon with low cost were analyzed and compared.At the same time,it also pointed out the developing trend of metallurgic method.