Back-contact solar cells and methods for fabrication
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United States of America Patent
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Dec 5, 2006
Grant Date -
Aug 11, 2005
app pub date -
Feb 3, 2005
filing date -
Feb 5, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods for fabrication of emitter wrap through (EWT) back-contact solar cells and cells made by such methods. Certain methods provide for higher concentration of dopant in conductive vias compared to the average dopant concentration on front or rear surfaces, and provided increased efficiency. Certain methods provide for selective doping to holes for forming conductive vias by use of printed dopant pastes. Other methods provide for use of spin-on glass substrates including dopant.
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