1. Henan Key Laboratory of Photovoltaic Materials, Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials Science and Engineering, Henan University, Kaifeng 475004, China
2. Faculty of Engineering, Huanghe Science and Technology College, Zhengzhou 450006, China
3. International Laboratory for Quantum Functional Materials of Henan, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China