Scanning Electrochemical Microscope Studies of Charge Transfer Kinetics at the Interface of the Perovskite/Hole Transport Layer

Figure 2

(a) Normalized SECM feedback approach curves in 1 mM [T⁻] for the approach of a Pt disc electrode, rT = 12.5 mm, toward FTO/CH₃NH₃PbI₃, FTO/NiO/CH₃NH₃PbI₃, and FTO/PEDOT:PSS/CH₃NH₃PbI₃ under illumination by a blue LED at a flux density of 13.9 mol cm⁻²s⁻¹. (b) Conductivity as a function of temperature at different times. (c) Conductivity of NiO/CH₃NH₃PbI₃ as a function of temperature. (d) Conductivity of PEDOT: PSS/CH₃NH₃PbI₃ as a function of temperature on one sun illumination.

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