1. Photovoltaics and Optoelectronic Devices Group
2. Departament de Física
3. Universitat Jaume I
4. 12071 Castelló
5. Spain
6. Michael Grätzel Center for Mesoscopic Solar Cells
7. Wuhan National Laboratory for Optoelectronics
8. School of Optical and Electronic Information
9. Huazhong University of Science and Technology
10. Wuhan 430074
11. School of Chemical Engineering and Department of Energy Science
12. Sungkyunkwan University
13. Suwon 440-746
14. South Korea