Fig. 2: Characterization of the device performances.
From: Ultrastable and efficient slight-interlayer-displacement 2D Dion-Jacobson perovskite solar cells
a Steady-state current density, measured for 600 s at the MPP. Inset: Histograms showing the device PCEs, fitted with Gaussian distributions (solid lines). b Stabilized power output at the MPP for the best-performing perovskite solar cells. Inset: J–V curves of the device with different delay times. c Statistical comparison of hysteresis factors (20 devices, respectively). The median value, maximum and minimum values, and 25% to 75% region of data are represented by the horizontal line (across the box), top/bottom bars, and box, respectively. Circle symbols represent data distribution. Inset: Table of the maximum, minimum, and average value of hysteresis factors. d Photovoltage decay curves of the corresponding devices. e Light intensity dependent voltage values of the devices on a seminatural logarithmic scale. f Carrier mobility and trap density comparison of electron-only and hole-only devices based on the PDMA- and CDMA-based 2D perovskite films.
