1. The Organic Photonics and Electronics GroupUmeå University Umeå SE‐90187 Sweden
2. Transport and Separations GroupDepartment of Physics, Chemistry, and BiologyLinköping University Linköping SE‐58183 Sweden
3. LunaLEC ABUmeå University Umeå SE‐90187 Sweden
4. Fraunhofer Institute for Organic ElectronicsElectron Beam and Plasma Technology FEPPlasma Technology Dresden 01277 Germany