1. Biomolecular and Organic Electronics Department of Physics, Chemistry and Biology Linköping University SE 581 83 Linköping Sweden
2. Instituto de Ciencia de Materiales de Barcelona ICMAB‐CSIC, Esfera UAB Campus Universidad Autónoma de Barcelona Bellaterra 08193 Barcelona Spain
3. Epishine AB Wahlbecksgatan 25 SE 582 13 Linköping Sweden
4. Materials Optics Department of Physics, Chemistry and Biology Linköping University SE 581 83 Linköping Sweden