Mitigating Mobile-Ion-Induced Instabilities and Performance Losses in 2D Passivated Perovskite Solar Cells.

ABSTRACT: Bulky ammonium salt-based passivation is an effective strategy for enhancing the performance and stability of perovskite solar cells (PSCs). Especially, phenethylammonium iodide (PEAI) is known to greatly improve open-circuit voltage (V_OC) and fill factor (FF). Despite these benefits, PEAI passivation leads to substantial short-circuit current density (J_SC) losses and rapid degradation under operational conditions. In this work, it is revealed that the J_SC loss as well as the accelerated degradation in PEAI-passivated devices is caused by an increased mobile ion density. To mitigate this performance and stability-limiting mechanism, ultrathin layers of ammonium benzenesulfonate (ABS) and/or ethylenediammonium diiodide (EDAI₂) salts are then intro

SUBMITTER: Seid BA 

PROVIDER: S-EPMC12306393 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature