Fig. 2 | npj Quantum Materials

Fig. 2

From: Touching is believing: interrogating halide perovskite solar cells at the nanoscale via scanning probe microscopy

Fig. 2

Mapping CH3NH3PbI3 on FTO/PEDOTS:PSS by pcAFM; a photocurrent mapping under a series of DC biases; b approximated IV curves; c estimated open-circuit photovoltage and short-circuit photocurrent density. These data are unpublished, with sample prepared according to ref. 17, and all pcAFM measurements were carried out on an Asylum Research MFP-3D AFM using ORCA conductive AFM with a gain of 5 × 108 V/A and a Nanosensors PPP-EFM conductive probe with a spring constant of 3.18 N/m. During the measurement, the sample was biased with specified DC voltage and illuminated in air through the bottom FTO cathode using an unfiltered CREE MK-R 12 V LED

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