1. Beijing National Laboratory for Molecular Sciences; 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. Cavendish Laboratory; University of Cambridge; Cambridge CB3 0HE UK
4. Department of Chemistry and Department of Physics; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
5. Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Department of Chemistry; School of Sciences; Tianjin University; Tianjin 300072 China
6. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China