1. State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Guangzhou 510640 P. R. China
2. Max Planck Institute for Polymer Research Ackermannweg 10 55122 Mainz Germany
3. Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 P. R. China
4. Chemical and Biological Systems Simulation Lab Center of New Technologies University of Warsaw Banacha 2C 02-097 Warsaw Poland
5. Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 P. R. China
6. Institute for Integrated Cell-Material Sciences Institute for Advanced Study Kyoto University Kyoto 606-8501 Japan
7. Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of Technology Guangzhou 510640 P. R. China