1. Guangzhou Institute
of Energy Conversion, Key Laboratory of Renewable Energy, Guangdong
Provincial Key Laboratory of New and Renewable Energy Research and
Development, Chinese Academy of Sciences, Guangzhou 510640, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Siyuan Laboratory, Department of Physics, Jinan University, Guangzhou 510632, Guangdong, China
4. Department of Electrical & Computer Engineering and Materials Science and Engineering Program, University of Houston, Houston, Texas 77204, United States
5. Tibet New Energy Research and Demonstration Centre, Lhasa, Tibet 850000, China