Low-cost solar cells and methods for their production
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United States of America Patent
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Jun 7, 2011
Grant Date -
May 14, 2009
app pub date -
Nov 7, 2008
filing date -
Nov 9, 2007
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Abstract
Methods for fabricating solar cells without the need to perform gasification of metallurgical-grade silicon are disclosed. Consequently, the costs and health and environmental hazards involved in fabricating the solar or silicon grade silicon are being avoided. A solar cell structure comprises a metallurgical grade doped silicon substrate and a thin-film structure formed over the substrate to form a p-i-n junction with the substrate. The substrate may be doped p-type, and the thin film structure may be an intrinsic amorphous layer formed over the substrate and an n-type amorphous layer formed over the intrinsic layer.
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