J-Aggregates of Amphiphilic Cyanine Dyes for Dye-Sensitized Solar Cells: A Combination between Computational Chemistry and Experimental Device Physics

Figure 7

Schematic simplified representation of the energy level diagram of Dye 1 (HOMO-LUMO) and TiO₂ (VB-CB). Arrows represent possible electron transport pathway from Dye 1 to CB of TiO₂. Light absorption results in creating excited state Dye 1 (HOMO-LUMO transition) from which charge transport to the CD of the TiO₂ is possible (curved arrow). Horizontal arrow indicates possible direct charge transport from the HOMO of Dye 1 to TiO₂.