1. State Key Laboratory of Metal Matrix Composites
2. School of Materials Science and Engineering
3. Shanghai Jiao Tong University
4. Shanghai 200240, China
5. Photovoltaic Materials Unit
6. National Institute for Materials Science
7. Tsukuba, Japan
8. Laboratory of Photonics and Interfaces
9. Institute of Chemical Sciences and Engineering
10. École Polytechnique Fédérale de Lausanne
11. 1015 Lausanne, Switzerland