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 Beiijng 100190 China
2. College of Materials Science and Optoelectronics Technology University of Chinese Academy of Sciences Beijing 100049 China
3. Department of Chemical Engineering Imperial College London London SW7 2AZ UK
4. Huairou Division, Institute of Physics Chinese Academy of Sciences Beijing 101400 China
5. Yangtze River Delta Physics Research Center Co. Ltd. Liyang 213300 China
6. Central Research Institute Huawei Technologies Shenzhen 518129 China