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, People’s Republic of China
2. Institute
of Polymer Optoelectronic Materials and Devices, State Key Laboratory
of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, People’s Republic of China