Mitigating residual MA<sup>+</sup> for stable FAPbI<sub>3</sub> perovskite photovoltaics.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41253798.
- Also identified by DOI 10.1038/s41467-025-65045-y and PMC identifier 12627597.
- Licence recorded as CC BY-NC-ND.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
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-FAPbI<sub>3</sub> 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 FAPbI<sub>3</sub>-based inverted PSCs, and exhibit sustained stability under accelerated aging conditions. This strategy resolves the MA⁺-induced degradation bottleneck, paving the way for commercially viable high-performance PSCs.