1. Institute for Clean Energy & Advanced Materials
2. Southwest University
3. Chongqing 400715
4. P. R. China
5. Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies
6. Institute of Materials Science and Devices
7. Suzhou University of Science and Technology
8. Suzhou
9. China
10. Division of Physics and Applied Physics
11. School of Physical and Mathematical Sciences
12. Nanyang Technological University
13. Singapore