1. Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Optoelectronic Thin Film Devices and Technology of Tianjin, College of Electronic Information and Optical Engineering, Engineering Research Center of Thin Film Photoelectronic Technology, Ministry of Education, Nankai University, Tianjin 300350, China
2. Shenzhen Research Institute of Nankai University, Shenzhen 518000, China