1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
2. Zhejiang Huacai Testing Technology Co., Ltd, Hangzhou 310012, China
3. School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
4. Beijing Engineering Research Center for Active Matrix Display, Peking University, Beijing 100871, China