Ultrathin Ga2O3 Photodetector with Fast Response and Trajectory Tracking Capability Fabricated by Liquid Metal Oxidation

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2024-09-28 DOI:10.1021/acs.nanolett.4c04030

Weiheng Zhong, Yuqing Liu, Hong Huang, Zhaojie Sun, Wei Xin, Weizhen Liu, Xiaolong Zhao, Shibing Long, Haiyang Xu

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Abstract

Low-dimensional Ga₂O₃ demonstrates a unique ultraviolet photoresponse and could be used in various electronic and optical systems. However, the low-dimensional Ga₂O₃ photodetector is faced with the challenges of a complex preparation process and poor device performance. In this work, ultrathin Ga₂O₃ layers with ∼7 nm thickness are prepared on quartz rods by UV exposure to liquid gallium. Benefiting from low-density oxygen vacancy defects cured by UV exposure, the low-dimensional Ga₂O₃ photodetector exhibits a high response speed (rise: 64.7 μs; fall: 51.4 μs) and an exceptional linear dynamic range of 120 dB. Furthermore, the photodetector array based on these ultrathin Ga₂O₃ shows an effective trajectory tracking capability by monitoring UV source motion. This work develops a simple preparation method to construct a low-dimensional UV photodetector array with fast response and useful trajectory tracking capability, exhibiting the significance of ultrathin Ga₂O₃ in UV optoelectronics.

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通过液态金属氧化法制造出具有快速响应和轨迹跟踪能力的超薄 Ga2O3 光电探测器

低维 Ga2O3 具有独特的紫外光响应，可用于各种电子和光学系统。然而，低维 Ga2O3 光探测器面临着制备工艺复杂、器件性能差等挑战。在这项工作中，通过将液态镓置于紫外光下，在石英棒上制备了厚度为 7 纳米的超薄 Ga2O3 层。得益于紫外线照射固化的低密度氧空位缺陷，低维 Ga2O3 光电探测器表现出较高的响应速度（上升：64.7 μs；下降：51.4 μs）和 120 dB 的优异线性动态范围。此外，基于这些超薄 Ga2O3 的光电探测器阵列通过监测紫外光源的运动，显示出有效的轨迹跟踪能力。这项研究开发了一种简单的制备方法来构建具有快速响应和有效轨迹跟踪能力的低维紫外光探测器阵列，展示了超薄 Ga2O3 在紫外光电子学中的重要作用。

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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.