PASSIVATED CONTACTS FOR BACK CONTACT BACK JUNCTION SOLAR CELLS
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United States of America Patent
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Mar 21, 2017
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Dec 2, 2013
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Abstract
Passivated contact structures and fabrication methods for back contact back junction solar cells are provided. According to one example embodiment, a back contact back junction photovoltaic solar cell is described that has a semiconductor light absorbing layer having a front side and a backside having base regions and emitter regions. A passivating dielectric insulating layer is on the base and emitter regions. A first electrically conductive contact contacts the passivating dielectric insulating layer together having a work function suitable for selective collection of electrons that closely matches a conduction band of the light absorbing layer. A second electrically conductive contact contacts the passivating dielectric insulating layer together having a work function suitable for selective collection of electrons that closely matches a valence band of the light absorbing layer.
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