Patent ID: 9640298
Date: 2017-05-02
CPC Classifications: H01B,H01L,Y02E

Claim:
1. A silver paste composition, comprising silver powder, glass frit powder, an organic binder and carbon black, having a viscosity of 90,000 to 500,000 cP measured by Brookfield viscometer at the conditions of spindle 14 and test temperature 25° C., wherein the carbon black has an average particle size of 0.2 μm to 0.4 μm and a specific surface area of 120 to 150 m wherein the silver powder includes spherical silver powder having an average particle size of 1 μm to 3 μm and flake type silver powder having an average particle size of 2 μm, wherein, as an electrode of a silicon solar cell, the silver paste composition provides a stable ohmic-contact with an emitter and a photo-conversion efficiency of 17.08 to 17.50% of the silicon solar cell.