High performance photodetector based on few-layer MoTe2/CdS0.42Se0.58 flake heterojunction

IF 6.5 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Frontiers of Physics Pub Date : 2024-01-27 DOI:10.1007/s11467-023-1374-3

Ran Ma, Qiuhong Tan, Peizhi Yang, Yingkai Liu, Qianjin Wang

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Abstract

Two-dimensional (2D) transition metal dichalcogenides have been extensively studied due to their fascinating physical properties for constructing high-performance photodetectors. However, their relatively low responsivities, current on/off ratios and response speeds have hindered their widespread application. Herein, we fabricated a high-performance photodetector based on few-layer MoTe₂ and CdS_0.42Se_0.58 flake heterojunctions. The photodetector exhibited a high responsivity of 7221 A/W, a large current on/off ratio of 1.73×10⁴, a fast response speed of 90/120 µs, external quantum efficiency (EQE) reaching up to 1.52×10⁶ % and detectivity (D*) reaching up to 1.67×10¹⁵ Jones. The excellent performance of the heterojunction photodetector was analyzed by a photocurrent mapping test and first-principle calculations. Notably, the visible light imaging function was successfully attained on the MoTe₂/CdS_0.42Se_0.58 photodetectors, indicating that the device had practical imaging application prospects. Our findings provide a reference for the design of ultrahigh-performance MoTe₂-based photodetectors.

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基于少层 MoTe2/CdS0.42Se0.58 薄片异质结的高性能光电探测器

二维（2D）过渡金属二钙化物因其迷人的物理特性而被广泛研究，用于构建高性能光电探测器。然而，它们相对较低的响应率、电流开/关比和响应速度阻碍了它们的广泛应用。在此，我们基于少层 MoTe2 和 CdS0.42Se0.58 薄片异质结制造了一种高性能光电探测器。该光电探测器具有 7221 A/W 的高响应率、1.73×104 的大电流开/关比、90/120 µs 的快速响应速度、1.52×106 % 的外部量子效率（EQE）和 1.67×1015 Jones 的检测率（D*）。通过光电流映射测试和第一原理计算，分析了异质结光电探测器的优异性能。值得注意的是，MoTe2/CdS0.42Se0.58 光探测器成功实现了可见光成像功能，表明该器件具有实际成像应用前景。我们的研究结果为设计基于 MoTe2 的超高性能光电探测器提供了参考。

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

Frontiers of Physics PHYSICS, MULTIDISCIPLINARY-

CiteScore

9.20

自引率

9.30%

发文量

898

审稿时长

6-12 weeks

期刊介绍： Frontiers of Physics is an international peer-reviewed journal dedicated to showcasing the latest advancements and significant progress in various research areas within the field of physics. The journal's scope is broad, covering a range of topics that include: Quantum computation and quantum information Atomic, molecular, and optical physics Condensed matter physics, material sciences, and interdisciplinary research Particle, nuclear physics, astrophysics, and cosmology The journal's mission is to highlight frontier achievements, hot topics, and cross-disciplinary points in physics, facilitating communication and idea exchange among physicists both in China and internationally. It serves as a platform for researchers to share their findings and insights, fostering collaboration and innovation across different areas of physics.