1. CAS
Research/Education Center for Excellence in Molecular Sciences, CAS
Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2. School
of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3. Department
of Physics and ORaCEL, North Carolina State University, Raleigh, North Carolina 27695, United States
4. Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
5. Laboratory
of Advanced Optoelectronic Materials, College of Chemistry, Chemical
Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China