Mixed low-dimensional metal halide perovskite single crystal for low-detection-limit x-ray detection via oriented ion migration

IF 22.7 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Infomat Pub Date : 2024-07-15 DOI:10.1002/inf2.12604
Xuefang Lu, Richeng Lin, Ying Ding, Man Xia, Wei Zheng, Feng Huang
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Abstract

Low-dimensional metal halide perovskites exhibit exceptional photoelectronic properties and intrinsic stability, positioning them as a promising class of semiconductor materials for light-emitting devices and photodetectors. In this work, we present a millimeter-scale single crystal of mixed low-dimensional (one-dimensional–zero-dimensional [1D–0D]) organic lead iodide with well-defined crystallinity. The fabricated single-crystal devices demonstrate high-sensitivity photoresponse and x-ray detection performance. By spatially isolating organic molecules to form the mixed 1D–0D crystal structure, ion migrations is effectively suppressed, resulting in a remarkable three orders of magnitude reduction in the dark current (56.4 pA @200 V) of the single-crystal devices. Furthermore, by enhancing the background characteristics, we achieved an impressive low x-ray detection limit of 154.5 nGys−1 in the single-crystal device. These findings highlight that the mixed 1D–0D organic lead iodide configuration efficiently controls ion migration within the crystal structure, offering a promising avenue for realizing high-performance perovskite-based photodetectors and x-ray detectors.

Abstract Image

Abstract Image

通过定向离子迁移实现低检测限 X 射线探测的混合低维金属卤化物包光体单晶体
低维金属卤化物包光体具有优异的光电子特性和内在稳定性,是一类很有前途的发光器件和光电探测器半导体材料。在这项工作中,我们展示了一种毫米级的低维(一维-零维 [1D-0D])混合有机碘化铅单晶,其结晶度非常清晰。制造出的单晶器件具有高灵敏度光响应和 X 射线探测性能。通过空间隔离有机分子形成 1D-0D 混合晶体结构,离子迁移被有效抑制,从而使单晶器件的暗电流(56.4 pA @ 200 V)显著降低了三个数量级。此外,通过增强背景特性,我们在单晶器件中实现了令人印象深刻的 154.5 nGys-1 的低 X 射线探测极限。这些发现突出表明,1D-0D 混合有机碘化铅构型可有效控制晶体结构内的离子迁移,为实现基于包晶的高性能光电探测器和 X 射线探测器提供了一条前景广阔的途径。
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来源期刊
Infomat
Infomat MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
37.70
自引率
3.10%
发文量
111
审稿时长
8 weeks
期刊介绍: InfoMat, an interdisciplinary and open-access journal, caters to the growing scientific interest in novel materials with unique electrical, optical, and magnetic properties, focusing on their applications in the rapid advancement of information technology. The journal serves as a high-quality platform for researchers across diverse scientific areas to share their findings, critical opinions, and foster collaboration between the materials science and information technology communities.
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