1. Institute of Polymer
Optoelectronic Materials and Devices, State Key Laboratory of Luminescent
Materials and Devices, South China University of Technology, 381 Wushan
Road, Guangzhou 510640, China
2. Institute of Molecular Functional Materials, Research Centre of Excellence
for Organic Electronics, Department of Chemistry and Institute of
Advanced Materials, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong China
3. Materials Sciences Division, Lawrence Berkeley National Lab, Berkeley, California 94720, United States
4. Department of Applied Biology and Chemical
Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong China