1. Key Laboratory of
Photovolatic and Energy Conservation Materials, Institute of Applied
Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230088, P. R. China
2. University of Science and Technology of China, Hefei, 230026, P. R. China
3. NAAM Research
Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
4. Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University, Beijing, 102206, P. R. China