1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3. College of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, China
4. Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
5. University of Chinese Academy of Sciences, Beijing 100049, China
6. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, China