One-Dimensional Hybrid Lead Halide Crystals with Molecular Pb-N Coordination for High-Performance Radiation Detection

Low-dimensional hybrid metal halides (HMHs) are promising for next-generation optoelectronics due to their structural diversity and excellent photophysical properties. However, weak ionic interaction and electronic coupling between organic-inorganic moieties lead to structural instability and inferior carrier transport. Here, we report one-dimensional hybrid lead halide crystals using multidentate aminoazole molecules that form Pb-N coordination bonds at the organic-inorganic interface. This dual-side bonding locks the hybrid structure, hinders ion migration, and promotes charge transport through electronic orbital overlap. An X-ray detector based on ATDZPbBr₃ polycrystalline wafers achieves the highest sensitivity of 1.63 × 10⁴ μC Gy_air^-1 cm^-2 and an ultralow detection limit of 19.7 nGy s^-1. This work establishes coordination chemistry as a powerful design paradigm for stable, high-performance hybrid semiconductors.