1. School of Physics and Materials Science
2. Guangzhou University/The Research Center for Advanced Information Materials
3. Huangpu Research & Graduate School of Guangzhou University
4. Guangzhou 510006
5. P. R. China
6. State Key Laboratory of Optoelectronic Materials and Technologies
7. School of Materials Science and Engineering/School of Physics
8. Sun Yat-sen University
9. Guangzhou 510275
10. School of Chemistry and Materials Engineering
11. Huizhou University
12. Huizhou 516007