Nanostructured Semiconductor Materials for Dye-Sensitized Solar Cells

Figure 7

Diagram of the electrical potential E levels involved in the process of photoactivated electron transfer (et) at the basis of the operation of a t-DSC. The separation evidenced by the double arrow represents the open-circuit voltage of the t-DSC. The latter parameter is determined by the difference between the Fermi levels of -type cathode and -type anode. Bent full arrows represent the dye-mediated et processes from the photoelectrodes to the corresponding forms of the redox couple (/, in the given example). The et processes are catalysed by the dye-sensitizers D and D with complementary light absorption properties.