1. College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P. R. China
2. Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM) Xiamen 361102 P. R. China
3. Institute of Molecular Plus Tianjin University Tianjin 300072 P. R. China
4. Department of Physics, School of Physical Science and Engineering Beijing Jiaotong University Beijing 100044 P. R. China
5. School of Advanced Materials Peking University Shenzhen Graduate School Shenzhen 518055 P. R. China
6. Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Science Beijing 100190 P. R. China