Jianglei Zhang, Weijun Li, Yifan Yang, Yuhong He, Zigao Tang, Haotong Wei, Junhu Zhang, Bai Yang
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引用次数: 0
摘要
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。
Oriented Alignment of CsPbBr3 Single-Crystal Arrays for Flexible X-ray Imaging.
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·Gyair-1·cm-2 and a low detection limit of 89 nGyair·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.
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:
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