1. Department of Physics, Shanghai Normal University, Shanghai, 200233, China
2. School of Photoelectric Engineering, Changzhou Institute of Technology, Changzhou, Jiangsu, 213002, China
3. Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming, 650500, China
4. School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China
5. Institute of Optoelectronics, Fudan University, Shanghai 200241, China