Reducing the defects located at the interfaces between the perovskite layer and charge transport layers is critical to improving the efficiency and stability of perovskite solar cells (PSCs). However, it is difficult to manipulate both interfaces simultaneously with synergistic beneficial effects. Here, we report a strategy of one-pot surface and buried interface manipulation of 3D perovskite films by introducing two diammonium Ni and Cu porphyrins. The Ni porphyrin (NiP) and Cu porphyrin (CuP) act as bulky cations to yield 2D perovskite layers at the top-buried interfaces of 3D perovskites. The porphyrin-based 2D perovskite layer facilitates charge transport significantly suppressing non-radiative recombination. The device based on CuP&NiP manipulation yields an improved efficiency of up to 24.2% along with long-term overall stability. This work provides an approach for one-pot surface and buried interface manipulation of perovskite films by functional porphyrins to improve the efficiency and stability of PSCs.

减少位于钙钛矿层和电荷传输层之间界面处的缺陷对于提高钙钛矿太阳能电池 (PSC) 的效率和稳定性至关重要。然而，很难同时操纵两个界面并产生协同有益效果。在这里，我们报告了一种通过引入二铵 Ni 和 Cu 卟啉来对 3D 钙钛矿薄膜进行单锅表面和埋入界面操作的策略。镍卟啉 (NiP) 和铜卟啉 (CuP) 作为大体积阳离子在 3D 钙钛矿的顶部埋入界面处产生 2D 钙钛矿层。基于卟啉的二维钙钛矿层促进电荷传输，显着抑制非辐射复合。基于 CuP 和 NiP 操作的设备产生高达 24.2% 的改进效率以及长期整体稳定性。