1. Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
2. Laboratory
for Thin Films and Photovoltaics, Empa − Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
3. Department
of Photonic Processes, Institute of Physics, National Academy of Sciences of Ukraine, 46 Prospekt Nauky, Kyiv 03680, Ukraine