Patent ID: 8017428
Filing Date: 2011-09-13
Classification: H01B,H01L,Y02E,Y02P

Abstract:
1. A process for the production of a silicon solar cell comprising the steps: (i) applying an aluminum paste on the back-side of a silicon wafer having a p-type region, an n-type region and a p-n junction, and being provided with a silicon nitride antireflective coating on its front-side and contaminated with silicon nitride on its back-side, and (ii) firing the surface provided with the aluminum paste, whereby the wafer reaches a peak temperature of 700 to 900° C., wherein the aluminum paste comprises particulate aluminum, magnesium oxide, wherein the magnesium oxide is present in a total proportion corresponding to a total magnesium contribution of 0.1 to 5 wt. %, based on total aluminum paste composition, and an organic vehicle comprising organic solvent(s).