1. Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
2. IEK5-Photovoltaics Forschungszentrum Jülich, 52425 Jülich, Germany
3. Saule Technologies, Dunska 11, 54-427 Wroclaw, Poland
4. Saule Research Institute, Dunska 11, 54-427 Wroclaw, Poland
5. Materials Theory for Energy Scavenging (MATES) Lab, Discipline of Physics, Indian Institute of Technology (IIT) Indore, Simrol, Indore 453552, India
6. Faculty of Engineering and CENIDE, University of Duisburg-Essen, Carl-Benz-Str. 199, 47057 Duisburg, Germany