1. Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; Hubei Key Lab on Organic and Polymeric Optoelectronic Materials; Department of Chemistry; Wuhan University; Wuhan 430072 P. R. China
2. Ningbo Institute of Materials Technology and Engineering; Chinese Academy of Sciences; Ningbo 315201 China
3. Institute of Polymer Optoelectronic Materials and Devices; State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 China