1. Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China
2. Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, USA
3. Key Laboratory for Organic Electronics and Information Displays (KLOEID), Jiangsu Key Laboratory for Biosensors, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210023, People’s Republic of China
4. Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607, USA
5. Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois 60607, USA
6. Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA