1. Key Laboratory for Renewable Energy Chinese Academy of Sciences (CAS) Beijing Key Laboratory for New Energy Materials and Devices Beijing National Laboratory for Condensed Matter Physics Institute of Physics Beijing 100190 China
2. College of Materials Science and Opto-Electronic Technology University Chinese Academy of Sciences Beijing 100049 China
3. Center for Clean Energy (CCE) Institute of Physics Chinese Academy of Sciences Beijing 101407 China
4. Songshan Lake Materials Laboratory Dongguan Guangdong 523808 China
5. State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China
6. School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China
7. Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China