1. Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
2. Laboratory for Thin Films and Photovoltaics, Empa − Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
3. Center for Hybrid Organic Inorganic Semiconductors for Energy, 15013 Denver West Parkway, Golden, Colorado 80401, United States
4. Department of Applied Physics and Materials Science, California Institute of Technology, Pasadena, California 91125, United States
5. Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
6. IBM Research Europe - Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
7. Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, 8010 Graz, Austria