THIN-FILM SOLAR MODULE WHICH IS CONTACT-CONNECTED ON ONE SIDE AND HAS AN INTERNAL CONTACT LAYER

摘要

The closest known thin-film solar module which is contact-connected on the rear side is based on two contact systems with different point contact-connections, the structuring of which, however, limits the quality of the absorber material used, with the result that pin configurations, in particular, can be achieved only with difficulty. For connection in series, the point contact-connections of the first and second contact systems must be exactly aligned with one another. In contrast, the thin-film solar cell module (00) according to the invention has a second contact system (13) having only one flat internal contact layer (16). The first contact system (12) has contact-connections (14) which are detected by an outer contact layer (15). For connection in series, the contact-connections (14) are connected to the internal contact area (16) in connection regions (21) between adjacent solar cell regions (09, 10) using series contact-connections (22). Outside the connection regions (22), the two contact systems (12, 13) are electrically insulated with respect to one another by the interposition of an insulation layer (17). The thin-film solar module (00) according to the invention can be implemented in a simple manner in all possible embodiments (pn or pin configuration, contact-connection on the rear side or front side, superstrate or substrate, integration of additional functional layers) without any alignment problems and yields the greatest possible degree of efficiency.