Efficient and high-precision image recognition in visible to near-infrared enabled by Bi2Te3/WS2 heterostructure photodetector

IF 3.1 3区物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION

Infrared Physics & Technology Pub Date : 2025-03-23 DOI:10.1016/j.infrared.2025.105822

Yongfeng Jia , Xuming Shi , Zhihao Wu , Xiao Zhuo , Jiaxiang Guo , Tiange Zhao , Linhong Cao , Fang Wang , Peng Wang , Zhiping He , Xiujuan Zhuang , Qiandong Zhuang , Jin Wang , Yajun Fu

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引用次数: 0

Abstract

Owing to its exceptional carrier mobility and unique topological features, Bi₂Te₃ emerges as an ideal material for crafting high-performance photodetectors. The synergistic integration of Bi₂Te₃ photodetectors with convolutional neural networks (CNNs) holds the potential to enhance feature extraction robustness and target recognition accuracy. This study focuses on the optoelectronic properties of the Bi₂Te₃/WS₂ heterojunction and explores its application in Image recognition in combination with CNNs. By fabricating the Bi₂Te₃/WS₂ photodetector, the dark current of the device has been effectively reduced, enabling photodetection within the visible-near-infrared wavelength range. The device has a detectivity of 8.39 × 10⁸ cm·Hz^1/2·W⁻¹ and a response time of 185 μs/71 μs. Furthermore, the Bi₂Te₃/WS₂ photodetector enables high-resolution image imaging. Leveraging CNNs, the image recognition accuracy attains 88 %. This research not only illuminates the construction of Bi₂Te₃ nanostructured optoelectronic heterojunction devices but also presents an innovative approach for image recognition applications.

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来源期刊

Infrared Physics & Technology 物理-光学

CiteScore

5.70

自引率

12.10%

发文量

400

审稿时长

67 days

期刊介绍： The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region. Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine. Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.