1. Department of Chemistry University of Zurich Winterthurerstrasse 190 Zurich CH‐8057 Switzerland
2. Institute for Solar Fuels Helmholtz‐Zentrum Berlin für Materialien und Energie GmbH Hahn‐Meitner‐Platz 1 14109 Berlin Germany
3. Laboratory for Photovoltaics Department of Physics and Materials Science University of Luxembourg Belvaux L‐4422 Luxembourg
4. Device Spectroscopy Laboratory Department of Chemistry Institute for Nanotechnology & Advanced Materials Bar‐Ilan University Ramat Gan 5290000 Israel
5. Empa Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf CH‐8600 Switzerland