1. Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, Norrköping 60174, Sweden
2. Department of Advanced Materials, IMRA Europe S.A.S., 220 rue Albert Caquot, BP 213, Sophia Antipolis 06904, France
3. LCC-CNRS, University of Toulouse, CNRS, 205 route de Narbonne, Toulouse 31077, France
4. Wallenberg Wood Science Center, Department of Science and Technology, Linköping University, Norrköping 60174, Sweden