1. Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education
2. Research Center of Advanced Materials Science and Technology
3. Taiyuan University of Technology
4. Taiyuan 030024
5. China
6. Department of Physics
7. Research Centre of Excellence for Organic Electronics and Institute of Advanced Materials
8. Hong Kong Baptist University
9. State Key Laboratory of Luminescence and Applications
10. Changchun Institute of Optics
11. Fine Mechanics and Physics
12. Chinese Academy of Sciences
13. Changchun 130033