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. College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
3. Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
4. Physical Chemistry of Solids, Max Planck Institute for Solid State Research, Heisenbergstr. 1, Stuttgart 70569, Germany
5. Huairou Division, Institute of Physics, Chinese Academy of Sciences, Beijing 101400, China
6. Yangtze River Delta Physics Research Center, Liyang, Jiangsu 213300, China
7. School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan 411105, China