1. Department of Physics and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, United Kingdom
2. Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, United Kingdom
3. Solenne BV, Zernikepark 6, 9747AN Groningen, The Netherlands
4. Stratingh Institute for Chemistry & Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747AN Groningen, The Netherlands
5. Department of Chemistry, University College London, Christopher Ingold Building, London WC1H 0AJ, United Kingdom
6. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom
7. IEK5-Photovoltaics, Forschungszentrum Jülich, 52425 Jülich, Germany
8. Faculty of Engineering and CENIDE, University of Duisburg−Essen, Carl-Benz-Strasse 199, 47057 Duisburg, Germany