1. The China−Germany Research Center
for Photonic Materials and Devices, The State Key Laboratory of Luminescent
Materials and Devices, and Guangdong Provincial Key Laboratory of
Fiber Laser Materials and Applied Techniques, School of Materials
Science and Engineering, South China University of Technology, Guangzhou 510641, China
2. IRCP Chimie ParisTech, 11 rue Pierre
et Marie Curie, 75231 Paris Cedex 05, France
3. State Key Laboratory
of Optoelectronic Materials and Technologies, School of Chemistry
and Chemical Engineering, SunYat-Sen University, Guangzhou 510275, China
4. The College of Materials and Energy, South China Agricultural University, Guangzhou 510640, China