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Title:
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Recycling of P-type mc-Si topcuts into P-type mono c-Si solar cells
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Author(s):
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Published by:
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Publication date:
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ECN
Solar Energy
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1-9-2013
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ECN report number:
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Document type:
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ECN-W--13-049
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Article (scientific)
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Number of pages:
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6
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Published in: Energy Procedia (Elsevier), , 2013, Vol.38, p.536-541.
Abstract:
Solar cell results and material analysis are presented of 2 p type Czochralski (Cz) ingots pulled from a charge consisting of 100% and 50% recycled multicrystalline silicon top cuts. The top cuts were pre cleaned with a dedicated low energy consuming technology. No structure loss was observed in the bodies of the ingots The performance of solar cells made from the 100% recycled Si ingot decreases towards the seed end of the ingot, which could be related to a non optimal pulling process. Solar cells from the tail end of this ingot and from the 50% recycled Si ingot demonstrated an average solar cell efficiency of 18.6%. This is only 0.1% absolute lower than the efficiency of higher resistivity reference solar cells from commercially available wafers that were co processed.
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