1. University of Potsdam, Institute of Chemistry, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
2. University of Cambridge, Electrical Engineering Division, 9 JJ Thomson Ave, Cambridge CB3 0FA, UK
3. Fraunhofer Institute of Applied Polymer Research (IAP), Geiselbergstraße 69, 14476 Potsdam, Germany
4. Technical University of Denmark, DTU Fotonik, Frederiksborgvej 399, 4000 Roskilde, Denmark