Experimental verification of upgraded metallurgical silicon photovoltaic power plant

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• 作者：Hong Yang (1)
  He Wang (1)
  Haidong Wang (2)
  Jiye Ding (2)
  
  1. Institute of Solar Energy ; MOE Key Laboratory for Nonequilibrim Synthese and Modulation of Condensed Matter ; Xi鈥檃n Jiaotong University ; Xi鈥檃n ; 710049 ; People鈥檚 Republic of China
  2. Ningxia Yinxing Energy Co. ; Ltd ; Yinchuan ; 750021 ; People鈥檚 Republic of China
  
• 关键词：Upgraded metallurgical silicon ; Solar cells ; Power plant ; Degradation
• 刊名：Clean Technologies and Environmental Policy
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：17
• 期：1
• 页码：281-285
• 全文大小：689 KB
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• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering
  Industrial Chemistry and Chemical Engineering
  Industrial Pollution Prevention
  Environmental Economics
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1618-9558

文摘

The upgraded metallurgical silicon (UMG-Si) purified by a metallurgical process route directly is more energy efficient than the conventional Siemens process, but high metallic impurities are the cause of a large fraction of the total recombination events in solar cells made from UMG-Si. The efficiency of crystalline silicon solar cells made by such materials is lower than that from a chemical route, and UMG solar cells have big light-induced degradation. So, there always exist debates about using the upgraded metallurgical silicon for photovoltaic. In this paper, the impurity contents of silicon samples obtained in different stages were investigated, and a four-year verification of the largest UMG photovoltaic power plant in the world was conducted for the first time. The reliability, operating performance, and defects of UMG photovoltaic power plant were analyzed.