Mechanically exfoliated MoTe2 thin film Photodetector with an ultra-broadband spectral response from ultraviolet to short-wavelength infrared

IF 7.6 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Sensors and Actuators Reports Pub Date : 2025-08-07 DOI:10.1016/j.snr.2025.100372

Feng Zhou , Siyuan Yu , Xuanqi Zhong , Haiting Zhang , Xiaoxian Song

引用次数: 0

Abstract

A high-performance 2H-phase MoTe₂ photodetector with an ultra-broadband spectral response spanning from ultraviolet (375 nm) to short-wavelength infrared (1550 nm) is reported, enabled by layer-dependent bandgap modulation. The device exhibits exceptional optoelectronic metrics, including a fast response time (80 μs), high responsivity (5.04 A/W), and specific detectivity (>3.0 × 10⁹ Jones). First-principles calculations reveal the critical role of reduced bandgap in multilayer MoTe₂ (down to 0.74 eV for bilayer structures) in facilitating efficient SWIR detection. Experimental validation through dual-band (375 nm/1550 nm) imaging of the “HIT” pattern confirms its spatial resolution and multispectral compatibility, highlighting its potential in next-generation optoelectronic systems for optical communication, environmental sensing, and integrated photonic circuits.

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机械剥离MoTe2薄膜光电探测器，具有从紫外到短波红外的超宽带光谱响应

报道了一种高性能的2h相MoTe₂光电探测器，其光谱响应范围从紫外（375 nm）到短波长红外（1550 nm），通过层相关带隙调制实现。该器件具有优异的光电性能，包括快速响应时间（80 μs）、高响应率（5.04 a /W）和特定探测率（>3.0 × 10⁹Jones）。第一线原理计算揭示了多层MoTe 2中减小带隙（双层结构降低到0.74 eV）在促进有效的SWIR检测中的关键作用。通过双波段（375 nm/1550 nm）成像“HIT”模式的实验验证证实了其空间分辨率和多光谱兼容性，突出了其在下一代光电子系统中用于光通信，环境传感和集成光子电路的潜力。

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

Sensors and Actuators Reports Multiple-

CiteScore

9.60

自引率

0.00%

发文量

审稿时长

49 days

期刊介绍： Sensors and Actuators Reports is a peer-reviewed open access journal launched out from the Sensors and Actuators journal family. Sensors and Actuators Reports is dedicated to publishing new and original works in the field of all type of sensors and actuators, including bio-, chemical-, physical-, and nano- sensors and actuators, which demonstrates significant progress beyond the current state of the art. The journal regularly publishes original research papers, reviews, and short communications. For research papers and short communications, the journal aims to publish the new and original work supported by experimental results and as such purely theoretical works are not accepted.