Fig. 1: Structure of 2D perovskites.
From: A binary 2D perovskite passivation for efficient and stable perovskite/silicon tandem solar cells
a Schematic illustration of B-2D strategy, showcasing dual passivation for perovskite bulk and surface. Evolution of XRD patterns (b) and steady-state PL spectra (c) for the perovskite films treated with varying concentrations of GACl. The ACI 2D phase was marked as #. d GIWAXS map of the B-2D perovskite film. e ToF-SIMS depth profiles of B-2D sample. The tracked ions are positively charged monovalent fragments. f AR-XPS spectrum for N 1 s of B-2D film. g Ration of ratio of integral characteristic peak areas of ACI (12.96°) and 3D (14.13°) extracted from the GIXRD.
