Conductive metal paste for a metal-wrap-through silicon solar cell

Abstract

A conductive metal via paste comprising particulate conductive metal, a reactant that reacts at temperatures of 600° C. to 900° C. with at least one of the group consisting of Si, SiO2 and SiNx to form an insulating glass, and an organic vehicle is particularly useful in providing the metallization of the holes in the silicon wafers of MWT solar cells. The result is a metallic electrically conductive via between the collector lines on the front side and the emitter electrode on the back-side of the solar cell. The paste can also be used to form the collector lines on the front-side of the solar cell and the emitter electrode on the back-side of the solar cell. Also disclosed are metal-wrap-through silicon solar cells comprising the fired conductive metal paste.

Dependencies are inferred from the claim text.