Novel Self-Powered Sensitive X-Ray Detection Crystal Bi2Mo0.36W1.64O9 with Effective Functional Motif Coupling in a Quasi-2D Perovskite Structure

IF 13 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Small Pub Date : 2025-01-21 DOI:10.1002/smll.202408041
Lishan Liu, Hanyue Zhou, Jingquan Liu, Xiangxin Tian, Zeliang Gao
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引用次数: 0

Abstract

The demand for medical imaging with reduced patient dosage and higher resolution is growing, driving the need for advanced X-ray detection technologies. This paper proposes a design paradigm for X-ray detection semiconductors by coupling constituent motifs through crystal structure engineering. The study introduces a strongly anisotropic Aurivillius-type quasi-2D perovskite structure, combining [Bi2O2]2+ groups with stereochemically active lone pair electrons (SCALPEs) and [W/Mo2O7]2− anionic groups, enabling enhanced X-ray Compton scattering and self-powered capabilities through local electric field ordering. This results in the first self-powered Bi-based tungstate Bi2Mo0.36W1.64O9 (BMWO) X-ray detector, achieving a record self-powered sensitivity of 381 µC Gy−1 cm−2. Additionally, the study demonstrates the imaging capability of a Bi-based perovskite X-ray detector operating in self-driven mode. The work highlights BMWO as a promising candidate for stable direct detection imaging and validates the material design strategy that leverages the large anisotropy of quasi-2D structures for sensitive and self-powered detection.

Abstract Image

Abstract Image

准二维钙钛矿结构中具有有效功能基序耦合的新型自供电灵敏x射线检测晶体Bi2Mo0.36W1.64O9
对减少患者剂量和提高分辨率的医学成像的需求正在增长,这推动了对先进x射线检测技术的需求。本文提出了一种通过晶体结构工程耦合组成基元的x射线探测半导体设计范式。该研究引入了一种强各向异性的aurivillius型准二维钙钛矿结构,将[Bi2O2]2+基团与立体化学活性孤对电子(SCALPEs)和[W/Mo2O7]2 -阴离子基团结合在一起,通过局部电场排序增强了x射线康普顿散射和自驱动能力。这导致了第一个自供电的铋基钨酸铋Bi2Mo0.36W1.64O9 (BMWO) x射线探测器,实现了创纪录的381µC Gy−1 cm−2的自供电灵敏度。此外,该研究还展示了在自驱动模式下工作的铋基钙钛矿x射线探测器的成像能力。这项工作强调了BMWO作为稳定直接检测成像的有前途的候选材料,并验证了利用准二维结构的大各向异性进行敏感和自供电检测的材料设计策略。
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来源期刊
Small
Small 工程技术-材料科学:综合
CiteScore
17.70
自引率
3.80%
发文量
1830
审稿时长
2.1 months
期刊介绍: Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments. With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology. Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.
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