1. Institute of Polymer
Optoelectronic Materials and Devices, State Key Laboratory of Luminescent
Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China
2. Sinopec Shanghai Research Institute of Petrochemical Technology, Shanghai, 201208, China
3. Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
4. MOE International Collaborative Laboratory
for Advanced Functional Materials, South China University of Technology, Guangzhou 510640, P. R. China
5. Department of Chemistry and Biochemistry, Center for
Polymers and Organic Solids, University of California, Santa Barbra, California 93106, United States