1. Bavarian Center for Applied Energy Research (ZAE Bayern); Energie Campus Nürnberg; Fürther Str. 250 90429 Nürnberg Germany
2. Laboratory for Chalcogenide Photovoltaics (LCP), Energy and Semiconductor Research Laboratory, Department of Physics; University of Oldenburg; Carl-von-Ossietzky-Strasse 9-11 26129 Oldenburg Germany
3. Institute of Materials for Electronics and Energy Technology (i-MEET); University of Erlangen-Nuremberg; Martensstraße 7 91058 Erlangen Germany