High Performance Dual‐Mode X‐Ray Detection Based on 0D Organic–Inorganic Hybrid Mn Halides

ABSTRACT X‐ray detection technology plays a crucial role in medical imaging, industrial non‐destructive testing, and security screening. However, conventional scintillator materials typically rely on a single luminescence mechanism, making it challenging to achieve both real‐time signal response and radiation dose information storage simultaneously. Herein, a zero‐dimensional organic–inorganic hybrid Mn(II) halides (0D‐OIMnHs) (C 15 H 18 N) 2 MnCl 4 is reported. The isolated [MnCl 4 ] 2− tetrahedra within its crystal structure exhibit outstanding luminescent properties due to the spatial confinement provided by the surrounding organic cations. By incorporating Cd 2+ doping to modulate the concentration of chlorine vacancies in the lattice, the radiative luminescence intensity under X‐ray excitation is significantly enhanced, and the long persistent luminescence (LPL) duration is markedly prolonged. This enables dual‐mode X‐ray detection by combining real‐time luminescence signaling with persistent LPL for dose recording. Furthermore, an information encryption system is demonstrated by exploiting the distinct LPL behaviors of the material under different excitation conditions, thereby broadening its potential applications in advanced anti‐counterfeiting technologies. This work presents a dual‐mode scintillator that integrates prompt radioluminescence and LPL, offering a promising strategy for advancing X‐ray detection in complex and multifunctional scenarios.