1. Center for Polymers and Organic Solids, University of California, Santa Barbara, California 93106, United States
2. Mitsubishi Chemical Center for Advanced Materials, Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
3. Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
4. Department of Physics and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, North Carolina 27695, United States
5. University of Lille, CNRS, Centrale Lille Institut, Université d’Artois, UMR 8181, Unité de Catalyse et Chimie du Solide, Lille F-59000, France