1. Heeger
Beijing Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing 100191, PR China
2. Beijing
National Laboratory for Molecular Science, Key Laboratory of Organic
Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
3. University of Chinese Academy of Sciences, Beijing 100049, PR China
4. State
Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510641, PR China
5. Center
for Polymers and Organic Solids, University of California, Santa Barbara, California 93106, United States
6. Department
of Chemistry and Institute for Materials Design, Hanyang University, Seoul 133-791, South Korea
7. School
of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, South Korea