1. Organic Semiconductor Centre EaStCHEM School of Chemistry University of St Andrews St Andrews Fife KY16 9ST UK
2. Institute of Functional Nano & Soft Materials (FUNSOM) Joint International Research Laboratory of Carbon‐Based Functional Materials and Devices Soochow University Suzhou Jiangsu 215123 P. R. China
3. Organic Semiconductor Centre SUPA School of Physics and Astronomy University of St Andrews North Haugh St Andrews Fife KY16 9SS UK
4. Cavendish Laboratory University of Cambridge Cambridge CB3 0HE UK
5. Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University Suzhou Jiangsu 215123 P. R. China