Oriented Alignment of CsPbBr₃ Single-Crystal Arrays for Flexible X-ray Imaging.

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-09-18 Epub Date: 2024-09-03 DOI:10.1021/acs.nanolett.4c03651

Jianglei Zhang, Weijun Li, Yifan Yang, Yuhong He, Zigao Tang, Haotong Wei, Junhu Zhang, Bai Yang

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Abstract

The utilization of perovskite materials in flexible optoelectronics is experiencing distinct diversification including X-ray detection applications. Here, we report the oriented alignment of cesium lead bromide (CsPbBr₃) single-crystal arrays on flexible polydimethylsiloxane (PDMS) substrates. By precisely confining the crystallization process within spatially delimited precursor droplets, we achieve a well-oriented crystal alignment through the spontaneous rotation of the CsPbBr₃ microcuboids. This approach allows for precise control over the microcuboid morphologies by varying the growth temperature. We design flexible X-ray detector arrays by seamlessly integrating CsPbBr₃ microcuboids with electrode arrays. The flexible X-ray detector can output a high sensitivity of 1.97 × 10⁵ μC·Gy_air^-1·cm^-2 and a low detection limit of 89 nGy_air·s^-1 after the surface passivation process. The excellent mechanical properties, outstanding X-ray detection capabilities, and high pixel uniformity are also demonstrated in conformal X-ray imaging of curved surfaces.

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用于灵活 X 射线成像的 CsPbBr3 单晶阵列定向排列。

包晶材料在柔性光电子学中的应用正经历着明显的多样化，包括 X 射线探测应用。在此，我们报告了在柔性聚二甲基硅氧烷（PDMS）基底上定向排列溴化铯铅（CsPbBr3）单晶阵列的情况。通过将结晶过程精确限制在空间受限的前驱体液滴中，我们通过 CsPbBr3 微立方体的自发旋转实现了定向良好的晶体排列。这种方法可以通过改变生长温度来精确控制微立方体的形态。通过将 CsPbBr3 微立方体与电极阵列无缝集成，我们设计出了柔性 X 射线探测器阵列。经过表面钝化处理后，柔性 X 射线探测器可输出 1.97 × 105 μC-Gyair-1-cm-2 的高灵敏度和 89 nGyair-s-1 的低检测限。卓越的机械性能、出色的 X 射线探测能力和高像素均匀性还在曲面保形 X 射线成像中得到了验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.