1. Schulich Faculty
of Chemistry, Nancy and Stephen Grand Technion Energy Program, Russell
Berrie Nanotechnology Institute, Solid State Institute, Technion, Haifa 3200003, Israel
2. Department
of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
3. Institute of Inorganic Chemistry, Department of Chemistry and Applied
Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
4. Laboratory for Thin Films and Photovoltaics, Empa − Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland