Fig. 3: Stability of IF-FACs-based PSCs.
From: Interfacial ferroelectricity unlocks stable formamidinium-based perovskites
a The long-term operational stability of the encapsulated FACs and IF-FACs-based PSCs. b PCE evolution during 1000 h stability test for the encapsulated IF-FACs-based mini-module under 85% RH at 85 °C. A 5 × 5 μm2 two-dimensional I− distribution at ~300 nm depth in the perovskite layer of PSCs based on (c) FACs and d IF-FACs perovskites was obtained by TOF-SIMs after a 1000 h stability test at their MPP. e Density of mobile ions (top panel) and the energy barrier for the ion migration in FACs and IF-FACs films (bottom panel).
