A Review on Current Status of Stability and Knowledge on Liquid Electrolyte-Based Dye-Sensitized Solar Cells

Figure 10

Evolution of UV-Vis absorption spectrum for reference MPN-based electrolyte (in black), electrolyte aged alone during 500 hours at 85°C/dark (in blue), and electrolyte aged in contact with TiO₂ (in red). In inset are reported high resolution transmission electron micrographs comparing the TiO₂ nanoparticles before and after ageing showing the formation of SEI layer.