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US 5,665,175 AGranted
Bifacial solar cell
OwnerYakov Safirinventor
Life of this patent
Estimating the term…
Abstract
A bifacial solar cell including a semiconductor substrate wafer, a first active area of a first conductivity type provided on at least a part of a first side of the wafer and a second active area of a second conductivity type provided on a second side of the wafter, the edge face of the wafter and the periphery of said first side of the wafter. The first active area and second active area are separated by a distance .lambda., the distance .lambda. allowing a leakage current to flow between the first and second active areas.
Claims2
A bifacial solar cell which comprises:
- a semiconductor substrate wafer;
- a first active area of a first conductivity type provided on at least a part of a first side of said wafer;
- a second active area of a second conductivity type provided on a second side of said wafer, the edge face of said wafer, and the periphery of said first side of the wafer;
- and
- said first active area and second active area being separated by a third area, said third area being provided with a third ring-shaped active portion of the second conductivity type and a fourth ring-shaped active portion of the first conductivity type, said third active portion abutting said first active area and said fourth active portion abutting said second active area, whereby said first and second active areas provide a first PN junction and said third and fourth active portions provide a second PN junction, said two PN junctions being directed opposite in polarity to each other.
2 more elements
Dependencies are inferred from the claim text.