Photovoltaic cells with copper grid
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United States of America Patent
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Dec 2, 2014
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Sep 14, 2011
filing date -
Sep 14, 2011
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Abstract
A photovoltaic device, such as a solar cell, having improved performance is provided. The photovoltaic device includes a copper-containing layer that contains an amount of impurities therein which is sufficient to hinder the diffusion of copper into an underlying semiconductor substrate. The copper-containing layer, which is located within a grid pattern formed on a front side surface of a semiconductor substrate, includes an electroplated copper-containing material having an impurity level of 200 ppm or greater located atop at least one metal diffusion barrier layer.
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