Research Article

Enhanced Photovoltaic Properties of Dye-Sensitized Solar Cells through Ammonium Hydroxide-Modified (Nitrogen-Doped) Titania Photoanodes

Figure 6

UV-visible absorption spectra of (a) dye-coated pure TiO2, 10N-TiO2, 20N-TiO2, 30N-TiO2, and 40N-TiO2 films and (b) desorbed dye from the same films.
(a)
(b)