ALUMINIUM PASTE COMPOSITION FOR BACK ELECTRODE OF SOLAR CELL

摘要

PURPOSE: An Aluminum paste composition for back electrode of solar battery is provided to reduce electrode wire resistance, to improve conductivity without influence to the formation of electric field on the back surface of an aluminum electrode, and to improve the efficiency of a solar cell and a module. CONSTITUTION: An Aluminum paste composition for back electrode of solar battery comprises: 64-75wt% aluminum powder of which average particle diameter(D_50) is 1-5micron; 1-5wt% spherical or plate-like conductive silver powder of which average particle diameter(D_50) is 20-100nm; 0.01-5wt% BiO_2-SiO_2-Al_2O_3-B_2O_3-SrO based glass frit; and 20-34.9wt% organic vehicle. The BiO_2-SiO_2-Al_2O_3-B_2O_3-SrO glass frit 20-30mol% BiO_2, 25-35 mol% SiO2, 5-15 mol% Al2O3, 20-40 mol% B2O3, and 1-10 mol% SrO.