Research Article

Effect of Modulating Spin-Coating Rate of TiO2 Precursor for Mesoporous Layer on Hysteresis of Solar Cells with Polar CH3NH3PbI3 Perovskite Thin Film

Figure 2

DC biases voltage and AC voltage groups are (a) (~10 V, 0 V) and (b) (~10 V, −10 V). Figures 2(a) and 2(b) are the same substrate and the same position.
(a)
(b)