1. Department of Chemistry; Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon Hong Kong 999077 China
2. HKUST Shenzhen Research Institute; No. 9 Yuexing 1st RD, South Area, Hi-Tech Park Nanshan Shenzhen 518057 China
3. NSFC Center for Luminescence from Molecular Aggregates; SCUT-HKUST Joint Research Institute; State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 P. R. China