The photoelectrode was dipped into the dye solution immediately after the high-temperature annealing and it was still hot (70 C) and then kept at room temperature for 24 h so that the dye was adsorbed onto the TiO2 films.
The photoelectrodewas dipped into the dye solution immediately after thehigh-temperature annealing and it was still hot (70 C) and thenkept at room temperature for 24 h so that the dye was adsorbedonto the TiO2 films.