1. Heeger
Beijing Research and Development Center, School of Chemistry and Environment, Beihang University, Beijing 100191, China
2. Beijing
National Laboratory for Molecular Science, Key Laboratory of Organic
Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3. State
Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
4. Hubei
Key Lab on Organic and Polymeric Optoelectronic Materials, Department
of Chemistry, Wuhan University, Wuhan 430072, China