1. Fraunhofer Institute for Applied Polymer Research, Department Polymers & Electronics, Geiselbergstrasse 69; Potsdam 14476 Germany
2. Light Technology Institute, Karlsruhe Institute of Technology (KIT), Engesserstrasse 13; Karlsruhe 76131 Germany
3. Material Research Center for Energy Systems, Karlsruhe Institute of Technology (KIT), Strasse am Forum 7; Karlsruhe 76131 Germany
4. Advent Technologies S.A., Stadiou Str; Platani Achaias Patras 26504 Greece
5. Department of Materials Science Engineering; University of Ioannina; Ioannina 45110 Greece