[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
[2] University of Chinese Academy of Sciences
[3] Center of Materials and Optoelectronics Engineering, University of Chinese Academy of Sciences
[4] Department of Physics, School of Science, Beijing Jiaotong University
[5] Songshan Lake Materials Laboratory