1. School of Materials Science & Engineering, Beijing Institute of Technology, 5 Zhongguancun South Street, Haidian District, Beijing, 100081, China
2. CAS Key Laboratory of Organic
Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3. Department of Chemistry, 80 St.
George Street, Institute for Optical Sciences, and Center for Quantum
Information and Quantum Control, University of Toronto, Toronto, Ontario, M5S 3H6 Canada