1. Organic Materials and Devices (OMD), Department of Materials Science, University Erlangen-Nürnberg, Martensstrasse 07, 91058 Erlangen, Germany
2. Institute for Organic Chemistry II, University Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany
3. H.C. Starck Clevios GmbH, Chempark Leverkusen B202, 51368 Leverkusen, Germany
4. Center for Nanoanalysis and Electron Microscopy (CENEM), Department of Materials Science, University Erlangen-Nürnberg, Cauerstrasse 6, 91058 Erlangen, Germany
5. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States