1. Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and TechnologySouth China Academy of Advanced OptoelectronicsSouth China Normal University Guangzhou 510006 China
2. State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat‐Sen University Guangzhou 510274 China
3. Laboratory of Solid‐State Microstructures and Innovation Center of Advanced MicrostructuresNanjing University Nanjing 21009 China
4. Institute of Electronic Paper Displays and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Academy of Advanced OptoelectronicsSouth China Normal University Guangzhou 510006 China