1. Institute of Polymer Optoelectronic Materials and Devices
2. State Key Laboratory of Luminescent Materials and Devices
3. South China University of Technology
4. Guangzhou
5. P. R. China
6. Institute of Materials for Electronics and Energy Technology (i-MEET)
7. FAU Erlangen-Nürnberg
8. 91058 Erlangen
9. Germany
10. Department of Physics and Astronomy
11. Shanghai Jiao Tong University
12. Shanghai 200240