1. School of Materials and Energy
2. Guangdong University of Technology
3. Guangzhou
4. P. R. China
5. Department of Electronic Engineering
6. State Key Laboratory of Optoelectronic Materials and Technologies
7. Nanotechnology Research Center
8. School of Materials Science & Engineering
9. Sun Yat-sen University
10. Institute of Semiconductors
11. South China Normal University
12. P.R. China