Thaidigsmann, BenjaminBenjaminThaidigsmannLohmüller, ElmarElmarLohmüllerClement, FlorianFlorianClementWolf, AndreasAndreasWolfBiro, DanielDanielBiro2022-03-082022-03-082014https://publica.fraunhofer.de/handle/publica/310157The invention relates to a photovoltaic solar cell with a front face designed for coupling light, comprising at least one recess (4) extending from the front face to the rear face in the semiconductor substrate (1) of a base doping type, at least one metal through-conduction structure (10), wherein the through-conduction structure (10) is guided in the recess (4) from the front face to the rear face of the semiconductor substrate and is connected in an electrically conductive manner to the metal front face contact structure (9), which is connected in an electrically conductive manner to an emitter region (2) of the opposite doping to the base doping type, formed on the front face, and at least one rear face contact structure (7), which is connected to the through-conduction structure (10); in an electrically conductive manner and is arranged on the electrically isolating isolation layer (6) on the rear face and covers the isolation layer at least in the regions surrounding the recess (4), and therefore the rear face contact structure (7) is electrically isolated by the isolation layer (6) against the semiconductor substrate (1) lying beneath the isolation layer (6). It is essential that the through-conduction structure (10) directly adjoins a base region of the base doping type on the walls of the recess (4) in the semiconductor substrate (1). The invention further relates to a method for producing a photovoltaic solar cell.de621patent102012217078