1. Michael Grätzel Center for Mesoscopic Solar Cells
2. Wuhan National Laboratory for Optoelectronics
3. Huazhong University of Science and Technology
4. Wuhan 430074
5. P. R. China
6. Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices
7. Institute of Functional Nano and Soft Materials (FUNSOM)
8. Soochow University
9. Suzhou 215123
10. China