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<p>This study investigates the use of hydrophobic fatty acid-derived antisolvents—lauric, stearic, and oleic acids—to enhance the stability and efficiency of perovskite solar cells (PSCs). Incorporating oleic acid into the chlorobenzene (CB) antisolvent yielded a champion device with a 17.29% power conversion efficiency (PCE), significantly surpassing the pure CB reference’s PCE (i.e., 11.16%). Key performance metrics for the optimized formulation (0.05&#xa0;wt.% oleic acid, O5) include a Fill Factor (FF) of 0.66, an open-circuit voltage (V<sub>OC</sub>) of 1.11&#xa0;V, and a short-circuit current density of 23.54&#xa0;mA.cm<sup>-2</sup>. Improved performance is corroborated by kinetic data, showing an increased carrier lifetime for O5 (24.80&#xa0;µs) compared to the reference (19.77&#xa0;µs). Crucially, the O5 device demonstrated superior operational stability, retaining 78% of its peak efficiency after 2500&#xa0;hours, versus 54% retention for the CB reference. This work confirms the efficacy of hydrophobic fatty acid modification for developing high-performance, stable PSCs.</p>

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Engineering Hydrophobic Fatty Acid-Derived Antisolvents to Enhance Crystallinity and Moisture Resistance in Perovskite Solar Cells

  • 期刊论文

  • 发表日期：

    2026年1月30日

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  • Niyoushasadat Nezamoddinykachooye,
  • Amirmahmoud Bakhshayesh

摘要

This study investigates the use of hydrophobic fatty acid-derived antisolvents—lauric, stearic, and oleic acids—to enhance the stability and efficiency of perovskite solar cells (PSCs). Incorporating oleic acid into the chlorobenzene (CB) antisolvent yielded a champion device with a 17.29% power conversion efficiency (PCE), significantly surpassing the pure CB reference’s PCE (i.e., 11.16%). Key performance metrics for the optimized formulation (0.05 wt.% oleic acid, O5) include a Fill Factor (FF) of 0.66, an open-circuit voltage (VOC) of 1.11 V, and a short-circuit current density of 23.54 mA.cm-2. Improved performance is corroborated by kinetic data, showing an increased carrier lifetime for O5 (24.80 µs) compared to the reference (19.77 µs). Crucially, the O5 device demonstrated superior operational stability, retaining 78% of its peak efficiency after 2500 hours, versus 54% retention for the CB reference. This work confirms the efficacy of hydrophobic fatty acid modification for developing high-performance, stable PSCs.