TUNNELING-JUNCTION SOLAR CELL WITH SHALLOW COUNTER DOPING LAYER IN THE SUBSTRATE
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United States of America Patent
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Issued Date -
Nov 14, 2013
app pub date -
Aug 31, 2012
filing date -
May 14, 2012
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Abstract
One embodiment of the present invention provides a tunneling junction solar cell. The solar cell includes a base layer, an emitter layer situated adjacent to the shallow counter doping layer, a surface field layer situated adjacent to a side of the base layer opposite to the shallow counter doping layer, a front-side electrode, and a back-side electrode. The base layer includes a shallow counter doping layer having a conduction doping type that is opposite to a remainder of the base layer. The emitter layer has a bandgap that is wider than that of the base layer.
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