* Corresponding authors

^a Beijing Key Laboratory of Novel Thin-Film Solar Cells, Beijing Key Laboratory of Energy Safety and Clean Utilization, North China Electric Power University, Beijing 102206, China
E-mail: sydai@ncepu.edu.cn

^b Key Laboratory of Photovoltaic and Energy Conservation Materials, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China

^c Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China

^d National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei, China
E-mail: jzhu@hfut.edu.cn