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. School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, P. R. China
3. School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, Mississippi 39406, United States
4. School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P. R. China
5. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P. R. China