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 6
PFM phase images of the CH3NH3PbI3 perovskite films which applied (~8 V, −3 V) (a) w/o mp-TiO2 layer and with the spin-coating rate of the mp-TiO2 precursor for (b) 3000 rpm and (c) 1500 rpm. PFM phase images of the CH3NH3PbI3 perovskite films which applied (~8 V, −6 V) (d–f) correspond to those which applied (~8 V, −3 V) without mp-TiO2 layer and with the different spin-coating rates of the mp-TiO2 precursor.
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