1. Sol−Gel
Center for Research on Inorganic Powders and Thin Films Synthesis
(SCRiPTS), Ghent University, B-9000 Ghent, Belgium
2. Physics
and Chemistry of Nanostructures Group (PCN), Ghent University, B-9000 Ghent, Belgium
3. NMR
and Structure Analysis Unit, Ghent University, B-9000 Ghent, Belgium
4. Laboratory
of Inorganic Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland
5. Laboratory
for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
6. Center for
Nano and Biophotonics, Ghent University, B-9000 Ghent, Belgium