1. SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology of Ministry of Education
2. College of Optoelectronic Engineering
3. Shenzhen University
4. Shenzhen 518060
5. China
6. Department of Chemistry
7. Faculty of Science
8. National University of Singapore
9. Singapore
10. State Key Laboratory of Rare Earth Resource Utilization
11. Changchun Institute of Applied Chemistry
12. Changchun
13. P. R. China