1. Institute of Organic Chemistry Karlsruhe Institute of Technology (KIT) Fritz‐Haber‐Weg 6 Karlsruhe 76131 Germany
2. Organic Semiconductor Centre, EaStCHEM School of Chemistry University of St Andrews Fife St Andrews KY16 9ST UK
3. Organic Semiconductor Centre, SUPA, School of Physics and Astronomy University of St Andrews North Haugh St Andrews KY16 9SS UK
4. Experimental Physics IV, Institute of Physics University of Augsburg Universitätsstr. 1 Augsburg 86159 Germany
5. Institute of Biological and Chemical Systems – Functional Molecular Systems (IBCS‐FMS) Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen D‐76344 Germany