1. Institute of Optoelectronic Display, National & Local United Engineering Lab of Flat Panel Display Technology, Fuzhou University, Fuzhou350002, China
2. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou350207, China
3. Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore117543, Singapore
4. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou350100, China