1. Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China
2. School of Electronic & Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
3. Shenzhen China Star Optoelectronics Semiconductor, Diaplay Technology Co., Ltd., ShenZhen 518132, China
4. Department of Physics, COMSATS, Institute of Information Technology Islamabad, Islamabad 45550, Pakistan