SOLAR CELL
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United States of America Patent
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Issued Date -
May 28, 2015
app pub date -
Jun 29, 2012
filing date -
Jun 29, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a solar cell comprising a semiconductor wafer, an emitter formed by at least one emitter region which comprises at least a first layer of a first conductivity type and a first contact layer allowing a carrier extraction or injection, a backcontact comprising at least a second layer of a second conductivity type opposite of said first conductivity type and a second contact layer allowing a carrier extraction or injection, electrical contacts which are connected to said emitter regions and said backcontact respectively and designed to transport an electrical current out of the solar cell. According to the invention, the area of the emitter covers between 0.5% to 15% of the area of a side of the wafer on which the emitter regions are provided, the rest of the area of said side of the wafer being covered by first passivating regions which comprise at least a first passivating layer and at least one first optional additional layer which makes that the first passivating layer does not allow a carrier extraction or injection, said first passivating regions being not fully covered by the first layer of the first conductivity type of the emitter regions.
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