1. National Center for International Research on Green Optoelectronics, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, P. R. China
2. Van’t Hoff Laboratory for Physical and Colloid Chemistry, Debye Research Institute, Utrecht University, Padualaan 8, Utrecht 3584 CH, The Netherlands
3. Faculty of Science and Technology, University of Twente, Enschede 7500 AE, The Netherlands
4. Shenzhen Guohua Optoelectronics Tech. Co. Ltd., Academy of Shenzhen Guohua, Optoelectronics, Shenzhen 518110, P. R. China