1. New Energy Technology Engineering Laboratory of Jiangsu Province and Crystal Physics Research Center and School of Science, Nanjing University of Posts and Telecommunications (NJUPT), Nanjing 210023, China
2. MIIT Key Laboratory of Advanced Display Materials and Devices, College of Materials Science and Engineering, Institute of Optoelectronics and Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, China
3. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China