Originated from the defects of hybrid halide perovskite and the intrinsic low hole mobility of hole transport materials (HTM), the perovskite degradation and interface carrier recombination hampered the stability and power conversion efficiency (PCE) of PSCs. Herein, we construct a dual-functional layer HTM-FJU-17 by incorporating the (Me₂NH₂)⁺-encapsulated indium-based anionic metal-organic framework (FJU-17) as a “capsule” into HTM. The FJU-17 capsule would passivate the organic cation vacancies with releasing (Me₂NH₂)⁺ ion, while its anionic framework can stabilize the positively charged oxidized HTM to enhance hole mobility. As a result, PSCs exhibit suppressed charge recombination with PCE improvement from 18.32% to 20.34%, and stable device is obtained with 90% retaining of the original PCE after 1000 h in ambient condition. This work demonstrates the promising potential of using the dual-functional layer based on the large family of anionic MOFs/HTMs to manufacture PSC devices with high performance and simplified preparation processes.

由于杂化卤化物钙钛矿的缺陷和空穴传输材料（HTM）固有的低空穴迁移率，钙钛矿的降解和界面载体的重组阻碍了PSC的稳定性和功率转换效率（PCE）。在这里，我们通过将（Me ₂ NH ₂）⁺封装的铟基阴离子金属有机骨架（FJU-17）作为“胶囊”并入HTM来构建双功能层HTM-FJU-17 。FJU-17胶囊会钝化有机阳离子空位，并释放（Me ₂ NH ₂）⁺离子，而其阴离子骨架可以稳定带正电荷的氧化HTM，从而提高空穴迁移率。结果，PSC表现出抑制的电荷重组，PCE从18.32％提高到20.34％，并且在环境条件下放置1000 h后，仍可保持90％的原始PCE保持稳定的器件。这项工作证明了使用基于大型阴离子MOF / HTM的双功能层来制造具有高性能和简化制备过程的PSC器件的潜在潜力。