Direct X-ray detectors that convert X-rays to electrical charges have broad applications in medicine and security screening. Common semiconductors like silicon and selenium for direct X-ray detectors have limitations in performance, versatility, and cost-effectiveness. Among new materials under investigation, metal halide perovskites demonstrate great potential for X-ray detectors; however, they are limited by low stability and toxicity. Here, we report, for the first time, a stable and eco-friendly zero-dimensional (0D) organic metal halide hybrid (OMHH), (TPA-P)₂ZnBr₄, for efficient X-ray detectors. With molecular sensitization, wherein metal halides (ZnBr₄^2–) act as X-ray absorbers and organic semiconducting components (TPA-P⁺, 4-(4-(diphenylamino)phenyl)-1-propylpyridin-1-ium) as charge transporters, 0D (TPA-P)₂ZnBr₄ detectors exhibit an impressive sensitivity of 2,292 μC Gy_air^–1 cm^–2 at 20 V and a low detection limit of 37.5 nGy_air s^–1. The exceptional stability of 0D (TPA-P)₂ZnBr₄ facilitates remarkably stable direct X-ray detection and shows the tremendous potential of rationally designed 0D OMHHs as new-generation radiation detection materials.

中文翻译：

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基于环保型半导体零维有机溴化锌混合物的直接 X 射线探测器


将 X 射线转换为电荷的直接 X 射线探测器在医学和安检中具有广泛的应用。用于直接 X 射线探测器的常见半导体（如硅和硒）在性能、多功能性和成本效益方面存在局限性。在正在研究的新材料中，金属卤化物钙钛矿在 X 射线探测器方面表现出巨大的潜力;然而，它们受到低稳定性和毒性的限制。在这里，我们首次报道了一种稳定且环保的零维 （0D） 有机金属卤化物杂化物 （OMHH） （TPA-P）₂ZnBr₄，用于高效 X 射线探测器。在分子敏化作用下，金属卤化物 （ZnBr₄^2–） 充当 X 射线吸收剂，有机半导体成分（TPA-P ⁺，4-（4-（二苯氨基）苯基）-1-丙基吡啶-1-ium）作为电荷转运蛋白），0D （TPA-P）₂ZnBr₄ 探测器表现出令人印象深刻的灵敏度，在 20 V 时为 2,292 μC Gy_air^–1 cm^–2，检测限为 37.5 nGy_air s^–1.0D （TPA-P）₂ZnBr₄ 的出色稳定性有助于非常稳定的直接 X 射线探测，并显示了合理设计的 0D OMHH 作为新一代辐射探测材料的巨大潜力。