2D Ruddlesden-Popper (RP) perovskites have attracted enormous attention in optoelectronic fields compared with their 3D counterparts. However, most of the reported perovskite ferroelectrics-based self-powered photodetectors (PDs) are fabricated from bulk single crystals rather than perovskite thin films with improved reproducibility, flexibility, and less preparation time. Nevertheless, the defect sites at surfaces and grain boundaries of 2D perovskites polycrystalline films make them vulnerable to humidity. Herein, the highly crystallized 2D RP perovskite ferroelectric films are successfully obtained. Then, a passivation method is applied on 2D perovskite film by an in-situ reaction with 4-fluoro-phenylethylamine iodide (4-FPEAI), which reduces the defect sites and endows the perovskite films with the outstanding hydrophobic property. Then, the as-prepared 2D-perovskite ferroelectric thin films were fabricated into self-powered PDs. Boosted by the ferro-pyro-phototronic effect, the self-powered PDs demonstrate excellent optoelectronic performances at 360 nm, with dark current less than 1 × 10⁻¹² A, a peak responsivity over 1 A W⁻¹, a detectivity of 1.5 × 10¹⁴ Jones and fast response/recovery speed. The photoresponsivity and specific detectivity are both enhanced by 67.8 times regarding the relative peak-to-peak current, compared with those only based on the photovoltaic induced photocurrent. Further, the PDs show high stability towards high humidity and thermal treatment.

与 3D 对应物相比，2D Ruddlesden-Popper (RP) 钙钛矿在光电领域引起了极大的关注。然而，大多数报道的基于钙钛矿铁电体的自供电光电探测器（PD）是由块状单晶而不是钙钛矿薄膜制成的，具有更高的重现性、灵活性和更少的制备时间。然而，二维钙钛矿多晶薄膜的表面和晶界处的缺陷位点使它们容易受到湿气的影响。在此，成功获得了高度结晶的二维 RP 钙钛矿铁电薄膜。然后，通过与碘化4-氟苯乙胺（4-FPEAI）的原位反应对二维钙钛矿薄膜进行钝化处理，减少了缺陷位点，赋予钙钛矿薄膜出色的疏水性。然后，将所制备的二维钙钛矿铁电薄膜制成自供电的 PD。在铁热光电子效应的推动下，自供电 PD 在 360 nm 处表现出优异的光电性能，暗电流小于 1 × 10^-12 A，超过 1 A W ^-1的峰值响应度，1.5 × 10 ¹⁴ Jones 的检测率和快速响应/恢复速度。与仅基于光伏感应光电流的相对峰峰值电流相比，光响应性和比检测率均提高了 67.8 倍。此外，PD 表现出对高湿度和热处理的高稳定性。