1. Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Material and Energy, Guangdong University of Technology, Guangzhou 510006, P. R. China
2. Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study, The Hong Kong University of Science and Technology, Kowloon, Hong Kong 999077, China
3. School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, P. R. China
4. Department of Chemistry, University of Hull, Cottingham Road, Hull, Yorkshire HU6 7RX, U.K.
5. Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates (South China University of Technology), Guangzhou 510640, P. R. China
6. Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China