1. Department of Materials Science and Engineering; College of Engineering; Key Laboratory of Polymer Chemistry and Physics of Ministry of Education; Peking University; Beijing 100871 China
2. Department of Chemistry; Capital Normal University; Beijing 100048 China
3. Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
4. State Key Laboratory for Mechanical Behavior of Materials; Xi'an Jiaotong University; Xi'an 710049 China
5. MacDiarmid Institute for Advanced Materials and Nanotechnology and School of Chemical and Physical Sciences; Victoria University of Wellington; Wellington 6010 New Zealand
6. Biomolecular and Organic Electronics; IFM; Linköping University; Linköping 58183 Sweden
7. Beijing Key Laboratory of Energy Conversion and Storage Materials; College of Chemistry; Beijing Normal University; Beijing 100875 China
8. Heeger Beijing Research and Development Center; School of Chemistry and Environment; Beihang University; Beijing 100191 China
9. Laboratory of Advanced Optoelectronic Materials; College of Chemistry; Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 China
10. National Center for Nanoscience and Technology; Beijing 100190 China