1. School of Material and Energy, Guangdong University of Technology, Guangzhou 510006, P. R. China
2. NSFC Center for Luminescence from Molecular Aggregates, SCUT-HKUST Joint Research Laboratory, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China
3. Beijing Institute of Graphic Communication, Beijing 102600, P. R. China
4. Department of Chemistry, University of Hull, Cottingham Road, Hull, Yorkshire HU6, UK
5. Laboratory for Soft Machines & Electronics, Michigan State University, East Lansing 48824, MI, USA
6. Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science & Technology, Kowloon, Hong Kong 999077, P. R. China
7. Shenzhen Institute of Molecular Aggregate Science and Engineering, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China