1. Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2. Huairou Division, Institute of Physics, Chinese Academy of Sciences, Beijing 101400, China
3. College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
4. Yangtze River Delta Physics Research Center Co. Ltd., Liyang 213300, China