1. Research Center for New Energy Technology (RCNET) National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS) Jiading Shanghai 201800 P. R. China
2. College of Materials Science and Opto‐Electronic Technology University of Chinese Academy of Sciences (UCAS) Shijingshan Beijing 100049 P. R. China
3. School of Physical Science and Technology ShanghaiTech University Shanghai 201210 P. R. China
4. Department of Photovoltaic Technology Huaneng Clean Energy Research Institute Beijing 102200 P. R. China
5. Huaneng Gansu Energy Development Co., Ltd. Lanzhou 730070 P. R. China
6. Tongwei Solar Co., Ltd. Chengdu 620866 P. R. China