SILVER PASTE WITH NO OR POOR FIRE-THROUGH CAPABILITY AND USE THEREOF FOR A SOLAR CELL METALLISATION

摘要

A silver paste having no or only poor fire-through capability comprises silver particles, at least one lead-free glass frit containing 0.5 to 15 wt.% SiO2, 0.3 to 10 wt.% Al203 and 67 to 75 wt.% Bi2O3 (the weight percentages being based on the total weight of the glass frit) and an organic vehicle, wherein the content of the silver particles in the paste is 60 to 92 wt.% based on total paste composition and wherein the paste is free from zinc oxide and compounds capable of generating zinc oxide on firing. The silver paste is used in the manufacture of metallisations (electrodes, parts of electrodes or other metal contacts) of solar cells.