1. School of Materials Science and Engineering
2. Nanyang Technological University
3. Singapore 639798
4. Singapore
5. Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM)
6. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
7. Nanjing University of Posts & Telecommunications (NUPT)
8. Nanjing 210023
9. China