Mitigating residual MA⁺ for stable FAPbI₃ perovskite photovoltaics.

ABSTRACT: Perovskite solar cells (PSCs) based on formamidinium lead iodide (FAPbI₃) demonstrate near-ideal bandgaps approaching the Shockley-Queisser efficiency limit, yet residual MA⁺ from methylammonium chloride (MACl) additives compromises their operational stability under thermal/light stress. Therefore, we developed an α-phase-assisted antisolvent method employing MACl-free precursors to fabricate α-FAPbI₃ films. These films exhibit enhanced thermal stability and structural integrity, which were comprehensively characterized using multiple techniques. The optimized devices achieved a 26.1% power conversion efficiency (PCE), ranking among one of the highest reported values for FAPbI₃-based inverted PSCs, and exhibit sustained stability under accelerated aging conditions. Th

SUBMITTER: Zhao K 

PROVIDER: S-EPMC12627597 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature