1. SCNU‐TUE Joint Lab of Device Integrated Responsive Materials (DIRM) National Center for International Research on Green Optoelectronics South China Normal University Guangzhou 510006 China
2. Institute of Electronic Paper Displays and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Academy of Advanced Optoelectronics South China Normal University Guangzhou 510006 China
3. Department of Materials Science and Engineering College of Engineering, Peking University Beijing 100871 China
4. Shenzhen Guohua Optoelectronics Tech. Co. Ltd. Shenzhen 518110 China