Multifunctional 0D Manganese‐Based Organic–Inorganic Hybrid Halide for Ultraviolets and X‐Ray Detection

Multifunctional photodetectors have driven the development of traditional optical communication technologies and emerging artificial intelligence fields. While three‐dimensional (3D) organic lead trihalides have recently demonstrated potential as versatile photodetectors, the device performance is constrained by ion mobility limitations. In contrast, low‐dimensional metal halide perovskites (MHPVKs) exhibit enhanced intrinsic stability, suppressed ion migration, and exceptional photoelectric properties. Inspired by these advantages, a zero‐dimensional (0D) manganese (Mn)‐based organic–inorganic hybrid halide (MA2MnBr4) and fabricated high‐quality films at room temperature via a facile melt‐growth method is presented. Subsequently, Ultraviolet (UV) and X‐ray detectors based on MA2MnBr4 films are fabricated, and their device performance is systematically characterized. The UV photodetector based on an MA2MnBr4 film showed a response rate of 11 mA W−1 and a detection rate of 1.4 × 1012 Jones. Meanwhile, the MA2MnBr4‐based X‐ray detector has a high sensitivity of 1959.9 µC Gyair−1 cm−2 and an exceptionally low detection dose rate of 73.1 nGyair s−1, both of which are required for medical diagnosis. This study not only advances the understanding of Mn‐based material but also highlights their promise for high‐performance UV and X‐ray detection.