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The low power conversion efficiency (PCE) of hole transport materials (HTM) – free carbon‐based perovskite solar cells (C‐PSCs) poses a challenge. Here, a novel 2D Eu‐TCPP MOF (TCPP; [tetrakis (4‐carboxyphenyl) porphyrin]) sandwiched between the perovskite layer and the carbon electrode is used to realize an effective and stable HTM‐free C‐PSCs. Relying on the synergistic effect of both the metal‐free...
Doping Mn2+ in newly emerged lead‐free metal halides to access versatile optoelectronic applications is highly desired. However, understanding the chemical pathway of Mn2+ doping and precisely controlling it remains challenging. Here, the crucial role of the initial surface adsorption of Mn2+ in doping kinetics is demonstrated, and the adsorption step is effectively optimized by a moderate Lewis base...