1. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
2. Faculty of Physics & Electronic Science
3. Hubei University
4. Wuhan 430062, P.R. China
5. Department of Applied Physics and Materials Research Centre
6. The Hong Kong Polytechnic University
7. Kowloon, P.R. China
8. Department of Materials Science & Engineering
9. Faculty of Engineering
10. National University of Singapore
11. , Singapore