Why do we make Cu(In,Ga)Se₂ solar cells non-stoichiometric?

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• 作者：Susanne Siebentritt ; Levent G¨¹tay ; David Regesch ; Yasuhiro Aida ; Val¨¦rie Depr¨¦dur
• 关键词：CIGS ; Cu-rich ; Defects ; Recombination
• 刊名：Solar Energy Materials and Solar Cells
• 出版年：2013
• 出版时间：December, 2013
• 年：2013
• 卷：119
• 期：Complete
• 页码：18-25
• 全文大小：838 K

文摘

The superior transport and lifetime properties of Cu-rich chalcopyrite semiconductors are discussed. The reason why solar cells are made from Cu-poor absorbers in spite of their inferior properties is the CdS/absorber interface which leads to high recombination in the case of Cu-rich absorbers. We report on Cu-rich solar cells with a Cu-poor surface, which have reached 13.1 % efficiency.