Fig. 4: Optoelectronic and photovoltaic properties in experiments.
From: The dynamic adsorption affinity of ligands is a surrogate for the passivation of surface defects
a Photoluminescence (PL) spectra, b photoluminescence quantum yield (PLQY) results, and c time-resolved photoluminescence (TRPL) spectra for control, APSA and 4-ABPA-treated Pb-Sn perovskite films. X-ray photoelectron spectroscopy (XPS) spectra of d P 2p, e Pb 4f and f Sn 3d for control and 4-ABPA- treated Pb-Sn perovskite films. a.u.: arbitrary units. g Champion forward (solid) and reverse (dashed) J-V curves of control, APSA and 4-ABPA-treated Pb-Sn perovskite solar cells (PSCs). JSC: short-circuit current density. h Device performance statistics of Pb-Sn and pure-Pb PSCs. PCE: power conversion efficiency. The box plot denotes minima (bottom line), maxima (top line), median (center line), 75th (top edge of the box), 25th (bottom edge of the box) percentiles. The dots represent each device datum. The sample sizes for both the control and 4-ABPA-treated Pb-Sn devices are 12, while the sample sizes for the control and 4-ABPA-treated pure-Pb devices are both 21. i Maximum power point (MPP) stability tracking of control, APSA and 4-ABPA treated Pb-Sn PSCs in ambient conditions.
