Figure 4
Time-dependent current for the ITO/TiO 2 /Si diode under UV on/off illumination. Time-dependent current for the ITO/TiO2/Si diode under UV on/off illumination when the following biases are applied to the ITO electrode: (a) -0.1 V, (b) -0.4 V, (c) -0.6 V, and (d) -1 V. (e) and (f) are the energy band diagrams in the short circuit condition and at a negative bias, respectively.