1. Department of Chemistry and Center for Plastic Electronics Imperial College London London W12 0BZ UK
2. Organic Bioelectronics Laboratory Biological Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia
3. Laboratory of Organic Electronics Department of Science and Technology Linköping University Norrköping SE‐60174 Sweden
4. Department of Science and Technology Wallenberg Wood Science Center Linköping University Norrköping SE‐60174 Sweden
5. Physical Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia
6. Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA
7. Department of Chemistry University of Oxford Oxford OX1 3TA UK