1. Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 China
2. Department of Materials Science and EngineeringCollege of EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationPeking University Beijing 100871 China
3. Department of ChemistryCapital Normal University Beijing 100048 China
4. Department of ChemistryHubei Key Laboratory on Organic and PolymericOpto-Electronic MaterialsWuhan University Wuhan 430072 China
5. Department of PhysicsThe Chinese University of Hong Kong New Territories Hong Kong 999077 China