1. SDU Centre for Photonics Engineering Mads Clausen Institute University of Southern Denmark Alsion 2 DK-6400 Sønderborg Denmark
2. Kekulé-Institute for Organic Chemistry and Biochemistry University of Bonn Gerhard-Domagk-Str. 1 D-53121 Bonn Germany
3. Department of Materials Chemistry and INSTM University of Milano-Bicocca Via R. Cozzi 53 I-20125 Milano Italy
4. Department of Chemistry University of Oldenburg Carl-von-Ossietzky-Str. 9–11 D-26129 Oldenburg Germany
5. Physical Chemistry University of Cologne Greinstr. 4–6 D-50939 Cologne Germany
6. Linz Institute for Solar Cells Johannes Kepler University Altenberger Str. 69 A-4040 Linz Austria
7. Center for Surface- and Nanoanalytics and Linz Institute for Solar Cells Johannes Kepler University Altenberger Str. 69 A-4040 Linz Austria
8. Institute of Physics University of Oldenburg Carl-von-Ossietzky-Str. 9–11 D-26129 Oldenburg Germany