1. National Renewable Energy Laboratory
2. Golden
3. Colorado 80401
4. USA
5. Laboratory of Photonics and Interfaces
6. School of Materials Science and Engineering
7. Sun Yat-sen University
8. Guangzhou
9. P.R. China
10. Institute of Chemical Sciences and Engineering
11. École Polytechnique Fédérale de Lausanne (EPFL)
12. Lausanne
13. Switzerland