1. Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan 030024 P. R. China
2. Key Laboratory of Interface Science and Engineering in Advanced Materials College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 P. R. China
3. Ningxia Screen Display Material (Ningdong) Technology Innovation Center Ningxia Sinostar Display Material Co.,Ltd. Yinchuan 750003 P. R. China