1. Institute of Physics and Astronomy University of Potsdam Karl-Liebknecht-Str. 24-25 14476 Potsdam-Golm Germany
2. AMOLF Center for Nanophotonics Science Park 104 1098 XG Amsterdam The Netherlands
3. Institut für Physik Technische Universität Chemnitz 09126 Chemnitz Germany
4. Department of Structure and Dynamics of Energy Materials Helmholtz-Zentrum-Berlin Hahn-Meitner-Platz 1 14109 Berlin Germany
5. IEK5-Photovoltaik Forschungszentrum Jülich GmbH 52425 Jülich Germany