1. IEK5‐Photovoltaik Forschungszentrum Jülich 52425 Jülich Germany
2. Faculty of Electrical Engineering and Information Technology RWTH Aachen University Mies‐van‐der‐Rohe‐Straße 15 52074 Aachen Germany
3. Faculty of Engineering and CENIDE University of Duisburg‐Essen Carl‐Benz‐Str. 199 47057 Duisburg Germany