1. School of Physics and Electronic Information Yan'an University Yan'an People's Republic of China
2. Key Laboratory of Semiconductor Photovoltaic at Universities of Inner Mongolia Autonomous Region, School of Physical Science and Technology Inner Mongolia University Huhhot Inner Mongolia People's Republic of China
3. Network Information Center Yan'an University Yan'an People's Republic of China
4. Yunnan Key Laboratory of Opto‐Electronic Information Technology College of Physics and Electronics Information Yunnan Normal University Kunming People's Republic of China
5. Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong People's Republic of China
6. Department of Materials Physics Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMTS) Chennai Tamil Nadu India