1. Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London W12 0BZ, United Kingdom
2. School of Materials Science & Engineering, School of Chemistry & Biochemistry, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, Georgia 30332-0100, United States
3. Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
4. Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
5. KAUST Solar Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
6. Department of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom