REAR-CONTACT SOLAR CELL HAVING ELONGATE, INTER-DIGITATED EMITTER AND BASE REGIONS ON THE REAR SIDE AND METHOD FOR PRODUCING THE SAME
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United States of America Patent
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Issued Date -
Feb 24, 2011
app pub date -
Nov 28, 2008
filing date -
Dec 11, 2007
priority date (Note) -
Abandoned
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Abstract
The invention relates to a rear-contact solar cell and to a method for producing the same, wherein elongate emitter regions (5) and elongate base regions (7) are defined in a semiconductor substrate (1) in a finely interleaved manner on the surface of the rear side of the cell. The elongate emitter regions (5) are contacted by elongate emitter contacts (11) that extend at a right angle thereto, and the elongate base regions (7) are contacted by elongate base contacts (13) that extend at a right angle thereto, the structural width of the emitter and base regions (5, 7) being substantially smaller than the structural width of the emitter and base contacts. The finely interleaved arrangement of emitter and base regions (5, 7) results in good current collecting properties and low series resistances within the semiconductor substrate. Owing to the less complicated structures of the metal contacts, the latter can be produced in a simple and reliable manner.
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