Figure 5
IS measurements as TiO2 thickness: red 0.6 µm, blue 1.15 µm and green 1.4 µm.
(a) Dark current during the IS measurements. (b) Recombination resistance extracted from the IS measurements in the dark. (c) Recombination resistance (solid lines) and accompanying capacitance (dashed lines) from IS measurements under illumination. (d) Electron lifetime under illumination.
