1. Heeger Beijing Research and Development Center School of Chemistry and Environment Beihang University Beijing 100191 P. R. China
2. State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 P. R. China
3. The College of Chemistry and Molecular Engineering Zhengzhou University Zhengzhou 450001 P. R. China
4. School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 689‐798 South Korea
5. Department of Chemistry, Institute for Materials Design Hanyang University Seoul 133‐791 South Korea
6. Department of Electrical and Electronic Engineering The University of Hong Kong Pokfulam Road Hong Kong P. R. China