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A Crystalline Metallic Copper Network Application Film Produced by High-Temperature Atmospheric Sintering

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7 Author(s)

We show the first production of a copper (Cu) application film (AF) consisting of a novel network of crystalline metallic Cu embedded with copper-phosphorus-oxygen glasses (Cu 2(PO4) and Cu 2P2O 7) to provide new feedstock materials for crystalline silicon (Si) photovoltaics (PVs). The Cu crystal network was preferentially grown in AF, and thus, a Cu AF with low-electrical resistivity was formed in air at elevated temperatures of ≥ 450°C by using a copper-phosphorus (Cu-P) alloy paste as a starting material for the sintering. The Cu-P alloy had the role that governed deoxidization of a cuprous oxide, which was formed on heating during the sintering, by virtue of a concurrent oxidation of the Cu phosphide at elevated temperatures. Our results may open the way to the widespread use of atmospherically sintered Cu AFs for mass-production of next-generation crystalline Si PVs.

Published in:

Photovoltaics, IEEE Journal of  (Volume:2 ,  Issue: 4 )