Direct X-ray Detectors Based on an Eco-Friendly Semiconducting Zero-Dimensional Organic Zinc Bromide Hybrid

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-11-01 DOI:10.1021/acsenergylett.4c02662

Oluwadara J. Olasupo, Thanh-Hai Le, Tunde B. Shonde, He Liu, Alexander Bouchard, Sara Bouchard, Thilina N. D. D. Gamaralalage, Abiodun M. Adewolu, Tarannuma F. Manny, Xinsong Lin, Yan-Yan Hu, Wanyi Nie, Biwu Ma

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Abstract

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.

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基于环保型半导体零维有机溴化锌杂化物的直接 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领域有着广泛的应用。用于直接 X 射线探测器的硅和硒等普通半导体在性能、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，金属卤化物过氧化物晶石在 X 射线探测器方面具有巨大潜力；然而，它们受到低稳定性和毒性的限制。在此，我们首次报道了一种用于高效 X 射线探测器的稳定且环保的零维（0D）有机金属卤化物杂化物 (OMHH)--(TPA-P)2ZnBr4。通过分子敏化（金属卤化物（ZnBr42-）作为 X 射线吸收体，有机半导体成分（TPA-P+，4-(4-(二苯基氨基)苯基)-1-丙基吡啶-1-鎓）作为电荷传输体），0D (TPA-P)2ZnBr4 探测器在 20 V 电压下的灵敏度高达 2,292 μC Gyair-1 cm-2，探测极限低至 37.5 nGyair s-1。0D (TPA-P)2ZnBr4的超强稳定性促进了非常稳定的X射线直接探测，并显示了合理设计的0D OMHHs作为新一代辐射探测材料的巨大潜力。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.