Photovoltaic solar cell and method for producing a metallic contacting of a photovoltaic solar cell

摘要

The invention relates to a method for producing a metallic contacting of a photovoltaic solar cell, comprising the following method steps: A providing a semiconductor substrate and B applying an aluminum-containing contacting layer directly or indirectly to one side of the semiconductor substrate; The invention is characterized in that in a method step C, a diffusion barrier layer, which acts as a diffusion barrier at least to aluminum, is applied directly or indirectly to the contacting layer and in a method step D, a solderable layer of a solderable material is applied directly or indirectly to the diffusion barrier layer and that the diffusion barrier layer and the contacting layer are applied by a PVD method.