1. Experimental Physics IV, Institute of Physics, University of Augsburg, Augsburg, Germany
2. Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, UK
3. Department of Physics, Durham University, Stockton Road, Durham, UK
4. Institute of Organic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
5. Macromolecular Chemistry, University of Bayreuth, Bayreuth, Germany
6. Institute of Biological and Chemical Systems – Functional Molecular Systems, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany