A Visible-NIR Responsive Dye-Sensitized Solar Cell Based on Diatom Frustules and Cosensitization of Photopigments from Diatom and Purple Bacteria

Figure 4

UV-Vis absorption spectra of the NA56 pigment extract (a) in ethanol, (b) on TiO₂ film, and (c) on diatom frustule-TiO₂ (TF3) film.