The active area of the devices with a metal mask was about 0.16 cm2. FF, fill factor.
Samples | Voc (mV) | Jsc (mA cm−2) | FF (%) | η (%) | Adsorbed dye (×10−7 mol cm−2)* |
Mesoporous TiO2 microspheres | 751 | 22.9 | 70.6 | 12.1 | 2.13 |
Bulk mesoporous TiO2 | 759 | 15.8 | 63.1 | 7.6 | 1.45 |
P25 | 734 | 12.3 | 75.0 | 6.8 | 1.12 |
*Dye-adsorbed films with an area of ~10 cm2 were used for estimating the adsorbed dye concentration. The commercial N719 dye was first desorbed into a 0.1 M NaOH solution in water and ethanol [1:1 (v/v)], and the desorbed N719 dye concentration was then measured by using an ultraviolet-visible spectrophotometer.