One-Dimensional Hybrid Lead Halide Crystals with Molecular Pb-N Coordination for High-Performance Radiation Detection.
basic_science · Level V
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- Record sourced from PubMed, PMID 42187138.
- Also identified by DOI 10.1021/acs.nanolett.6c01328.
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Abstract
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 ATDZPbBr<sub>3</sub> polycrystalline wafers achieves the highest sensitivity of 1.63 × 10<sup>4</sup> μC Gy<sub>air</sub><sup>-1</sup> cm<sup>-2</sup> and an ultralow detection limit of 19.7 nGy s<sup>-1</sup>. This work establishes coordination chemistry as a powerful design paradigm for stable, high-performance hybrid semiconductors.