1. Beijing Advanced Innovation Center for Materials Genome Engineering, Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
3. School of Materials Science and Engineering and Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China.
4. College of Physics, Qingdao University, Qingdao, Shandong 266071, China.
5. School of Physics and Astronomy and Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China.
6. Yangtze River Delta Physics Research Center Co. Ltd., Liyang, Jiangsu 213300, China.