1. Key Laboratory for Flexible Electronics
2. Institute of Advanced Materials (IAM)
3. Nanjing Tech University
4. Nanjing
5. P.R. China
6. Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials
7. Nanjing University of Posts and Telecommunications
8. Nanjing 210046
9. Department of Chemistry
10. Wuhan University
11. Wuhan