Rear side layer system for thin-film solar module, has transition or border region arranged between adaptation layer and rear layer and having additional roughness value of greater than certain percent related to nominal layer thickness

摘要

The system has a rear contact including a conductive light-reflecting rear layer (506) and an adaptation layer (505) that is adjacent to the rear layer on a side of an incident light. A transition or a border region provided between the adaptation layer and the rear layer has an additional roughness value of greater than 25 percent related to a nominal layer thickness determined by an atomic force microscope measuring method. The adaptation layer is a low-pressure chemical vapor deposition zinc oxide layer working as a diffuser. The rear layer consists of metal. An independent claim is also included for a method for producing a rear side layer system for thin-film solar modules with a rear contact.