Photovoltaic Cell And Method Of Forming The Same
First Claim
1. A photovoltaic cell comprising:
- a base substrate comprising silicon and including a rear region;
a first electrode disposed on said rear region of said base substrate and having an outer surface, with said first electrode in electrical contact with said rear region of said base substrate and comprising a first metal present in said first electrode in a majority amount; and
a second electrode spaced from said rear region of said base substrate such that said rear region of said base substrate is free of physical contact with said second electrode, with said second electrode in electrical contact with said first electrode;
wherein said second electrode comprises;
a polymer,a second metal present in said second electrode in a majority amount, anda third metal different from said first metal of said first electrode and said second metal of said second electrode with said third metal having a melting temperature of no greater than about 300°
C.; and
wherein said rear region of said base substrate is in electrical communication with said second electrode via said first electrode.
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Abstract
A photovoltaic cell comprises a base substrate comprising silicon and including a rear region. A first electrode is disposed on, and is in electrical communication with, the rear region, and comprises a first metal present in the first electrode in a majority amount. A second electrode is spaced from the rear region such that the rear region is free of physical contact with the second electrode. The second electrode is in electrical contact with the first electrode. The second electrode comprises a polymer, a second metal present in the second electrode in a majority amount, and a third metal different from the first and second metals. The third metal has a melting temperature of no greater than about 300° C. The rear region is in electrical communication with the second electrode via the first electrode. A method of forming the PV cell is also provided.
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Citations
22 Claims
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1. A photovoltaic cell comprising:
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a base substrate comprising silicon and including a rear region; a first electrode disposed on said rear region of said base substrate and having an outer surface, with said first electrode in electrical contact with said rear region of said base substrate and comprising a first metal present in said first electrode in a majority amount; and a second electrode spaced from said rear region of said base substrate such that said rear region of said base substrate is free of physical contact with said second electrode, with said second electrode in electrical contact with said first electrode; wherein said second electrode comprises; a polymer, a second metal present in said second electrode in a majority amount, and a third metal different from said first metal of said first electrode and said second metal of said second electrode with said third metal having a melting temperature of no greater than about 300°
C.; andwherein said rear region of said base substrate is in electrical communication with said second electrode via said first electrode. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 11, 12, 14, 15, 16, 17)
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3. A photovoltaic cell comprising:
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a base substrate comprising silicon and including a rear region selected from an n-type doped region and/or a p-type doped region; a first electrode disposed on said rear region of said base substrate and having an outer surface, with said first electrode in electrical contact with said rear region of said base substrate and comprising a first metal comprising aluminum and/or silver present in said first electrode in a majority amount; and a second electrode spaced from said rear region of said base substrate such that said rear region of said base substrate is free of physical contact with said second electrode, with said second electrode in electrical contact with said first electrode; wherein said second electrode comprises; a polymer comprising an epoxy, an acrylic, or a combination thereof, a second metal comprising copper or silver present in said second electrode in a majority amount, and a third metal comprising solder with said solder having a melting temperature of no greater than about 300°
C.; andwherein said rear region of said base substrate is in electrical communication with said second electrode via said first electrode. - View Dependent Claims (10)
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13. (canceled)
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18. A method of forming a photovoltaic cell comprising a base substrate comprising silicon and including a rear region, a first electrode disposed on the rear region of the base substrate and having an outer surface, with the first electrode in electrical contact with the rear region of the base substrate and comprising a first metal present in the first electrode in a majority amount, and a second electrode spaced from the rear region and in electrical contact with the first electrode, said method comprising the steps of:
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applying a composition to the outer surface of the first electrode to form a layer such that the rear region of the base substrate is free of physical contact with the layer; and heating the layer to a temperature of no greater than about 300°
C. to form the second electrode;wherein the composition comprises; a polymer, a second metal present in the composition in a majority amount, and a third metal different from the first metal of the first electrode and the second metal of the composition; and wherein the rear region of the base substrate is in electrical communication with the second electrode via the first electrode. - View Dependent Claims (19, 20, 22)
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21. (canceled)
Specification