1. Helmholtz‐Zentrum Berlin für Materialien und Energie GmbH Kekuléstrasse 5 12 489 Berlin Germany
2. Charles University Faculty of Mathematics and Physics Institute of Physics Ke Karlovu 5 Prague 2 CZ‐121 16 Czech Republic
3. CNRS UMR 9006 IPVF Institut Photovoltaïque d'Ile‐de‐France 18 Boulevard Thomas Gobert Palaiseau 91120 France
4. Weizmann Institute of Science Department of Materials and Interfaces Rehovot 7610001 Israel
5. Central European Institute of Technology CEITEC BUT Purkynova 656/123 Brno 61200 Czech Republic