Batteries: thermoelectric and photoelectric – Photoelectric – Cells
Reexamination Certificate
2011-05-14
2011-12-27
Ridley, Basia (Department: 1725)
Batteries: thermoelectric and photoelectric
Photoelectric
Cells
C438S096000
Reexamination Certificate
active
08084683
ABSTRACT:
Solar cells fabricated without gasification of metallurgical-grade silicon. The substrates are prepared by: melting metallurgical grade silicon in a furnace; solidifying the melted metallurgical grade silicon into an ingot; slicing the ingot to obtain a plurality of wafers; polishing and cleaning each wafer; depositing aluminum layer on backside of each wafer; depositing a layer of hydrogenated silicon nitride on front surface of each wafer; annealing the wafers at elevated temperature; removing the hydrogenated silicon nitride; and, removing the aluminum layer. The front surface may be textured prior to forming the solar cell. The solar cell structure comprises a metallurgical grade doped silicon substrate and a thin-film structure formed over the substrate to form a p-i-n junction with the substrate. The substrate may be doped p-type, and the thin film structure may be an intrinsic amorphous layer formed over the substrate and an n-type amorphous layer formed over the intrinsic layer.
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Ayad Tamir
Bach Joseph
Ridley Basia
LandOfFree
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