1. Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, Guangdong, China
2. BIOS/Lab-on-a-Chip group, MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
3. Academy of Shenzhen Guohua Optoelectronics, Shenzhen 518110, Guangdong, China