METHOD FOR THE PRODUCTION OF A MULTI-LAYER BACK ELECTRODE FOR A PHOTOVOLTAIC THIN-FILM SOLAR CELL, MULTI-LAYER BACK ELECTRODE ACCORDING TO THE METHOD, PHOTOVOLTAIC THIN-FILM SOLAR CELL AND MODULE COMPRISING THE MULTI-LAYER BACK ELECTRODE

摘要

A multilayer back electrode for a photovoltaic thin-film solar cell, including: at least one bulk back electrode layer, at least one, ohmic, contact layer, obtained by applying at least one ply containing/essentially made of at least one metal chalcogenide, selected from molybdenum, tungsten, tantalum, cobalt, and/or niobium, and the chalcogen being selected from selenium and/or sulfur, with physical or chemical gas phase deposition while using at least one metal chalcogenide source, or obtained by applying at least one metal ply (first ply), the first ply and the bulk back electrode layer not corresponding in their composition, in the particular metal used or, if multiple metals are in the metal ply and the bulk back electrode layer, with regard to at least one, in particular all of these metals (Mo, W, Ta, Nb, and/or Co) and a metal chalcogenide ply (second ply), use of the back electrode for manufacturing thin-film solar cells and modules, photovoltaic thin-film solar cells and modules containing the back electrode, and a related method for manufacture.