1. Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-60174 Norrköping, Sweden
2. Institut für Physikalische Chemie, Department Chemie, Universität zu Köln, Luxemburger Str. 116, D-50939 Köln, Germany
3. Department of Physics Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
4. Flexterra Corporation, 8025 Lamon Avenue, 60077-5318 Skokie, Illinois, United States
5. Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, 4000 Roskilde, Denmark
6. Department of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 United States