1. College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China
2. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
3. Ningbo Nata Opto-Electronic Materials Co. Ltd., Ningbo 315809, P. R. China
4. Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, P. R. China
5. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
6. College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou 325035, P. R. China
7. Department of Chemical Engineering, Northeastern University, Boston, Massachusetts 02115, United States