1. Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin300384, P. R. China
2. Key Laboratory of Display Materials and Photoelectric Devices, Tianjin University of Technology, Ministry of Education, Tianjin300384, P. R. China
3. Tianjin Baihui Unique Technology Co. Ltd., Tianjin300402, P. R. China