1. Michael Grätzel Centre for Mesoscopic Solar Cells
2. Wuhan National Laboratory for Optoelectronics and College of Optoelectronic Science and Engineering
3. Huazhong University of Science and Technology
4. Wuhan 430074, P. R. China
5. Department of Materials Engineering
6. Monash University
7. Melbourne, Australia
8. Department of Chemistry
9. The Hong Kong University of Science and Technology
10. Clear Water Bay
11. Kowloon, China