High-performance self-powered MoS1.2Se0.8 lateral homojunction photodetector with broadband spectrum response

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-10-06 DOI:10.1063/5.0284067

Junqi Wang, Shengyao Chen, Huan Liu, Yusong Qu, You Li, Lijun Ma, Xiaoshan Du, Shu Wang, Zhican Zhou, Cong Wang, Junjie Qi, Qian Liu

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引用次数: 0

Abstract

Self-powered photodetector plays a key role in lower power consumption operation in the next-generation optoelectronic system. In recent years, two-dimensional (2D) materials van der Waals lateral homojunction has revealed exceptional potential in the self-powered photodetector. Here, we propose a n–n+ lateral homojunction photodetector based on the intrinsic thickness-dependent bandgap of 2D semiconductor material MoS1.2Se0.8. The photodetector has a pronounced self-powered feature with gate-tunable photovoltaic response and exhibits remarkable zero-bias performance with a photoresponsivity of 4.35 A/W and a specific detectivity of 1.49 × 1011 Jones. Furthermore, the photodetector maintains superior performance across a broad spectral range from 405 to 808 nm. This work not only validates the significant potential of thickness-modulated lateral homojunction in self-powered photodetection but also establishes a versatile platform for developing advanced optoelectronic devices through band structure engineering in 2D material systems.

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具有宽带频谱响应的高性能自供电MoS1.2Se0.8横向同结光电探测器

自供电光电探测器在下一代光电系统的低功耗运行中起着关键作用。近年来，二维材料范德华横向同质结在自供电光电探测器中显示出了非凡的潜力。在这里，我们提出了一种基于二维半导体材料MoS1.2Se0.8的本征厚度相关带隙的n-n +横向同结光电探测器。该光电探测器具有明显的自供电特性，具有栅极可调谐的光伏响应，具有显著的零偏性能，光响应率为4.35 a /W，比探测率为1.49 × 1011 Jones。此外，光电探测器在405至808 nm的宽光谱范围内保持优越的性能。这项工作不仅验证了厚度调制横向同质结在自供电光探测中的巨大潜力，而且还通过二维材料系统中的带结构工程为开发先进的光电器件建立了一个通用平台。

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

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.