Multiband Infrared Photodetection Based on Colloidal Quantum Dot

Yingying Xu; Xiaomeng Xue; Lixiong Wu; Zhikai Gan; Menglu Chen; Qun Hao

doi:10.3390/photonics13010089

Multiband Infrared Photodetection Based on Colloidal Quantum Dot

Yingying Xu
, Xiaomeng Xue
, Lixiong Wu
, Zhikai Gan^*
, Menglu Chen^*
, Qun Hao

^*此作品的通讯作者

Beijing Institute of Technology
National Institute of Metrology China
State Key Laboratory of Laser Interaction with Matter
National Key Laboratory of Infrared Detection Technologies

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摘要

Multispectral infrared detection plays a crucial role in advanced applications spanning environmental monitoring, military surveillance, and biomedical diagnostics, offering superior target identification accuracy compared to single-band imaging techniques. In this work, we synthesized four distinct bands of colloidal quantum dots (CQDs)—specifically, a cut-off of 1.3 µm with PbS CQDs and 1.8 µm, 2.6 µm, and 3.5 µm with HgTe CQDs—and employed them to construct planar multiband infrared photodetectors. The device exhibited a clear photoresponse at room temperature from 0.8 µm to 3.5 µm, with responsivity of 5.39 A/W and specific detectivity of 2.01 × 10¹¹ Jones at 1.8 µm. This materials–device co-design strategy integrates wavelength-selective CQD synthesis with planar pixel-level patterning, providing a versatile pathway for developing low-cost, solution-processed, multiband infrared photodetectors.

源语言	英语
文章编号	89
期刊	Photonics
卷	13
期	1
DOI	https://doi.org/10.3390/photonics13010089
出版状态	已出版 - 1月 2026
已对外发布	是

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title = "Multiband Infrared Photodetection Based on Colloidal Quantum Dot",

abstract = "Multispectral infrared detection plays a crucial role in advanced applications spanning environmental monitoring, military surveillance, and biomedical diagnostics, offering superior target identification accuracy compared to single-band imaging techniques. In this work, we synthesized four distinct bands of colloidal quantum dots (CQDs)—specifically, a cut-off of 1.3 µm with PbS CQDs and 1.8 µm, 2.6 µm, and 3.5 µm with HgTe CQDs—and employed them to construct planar multiband infrared photodetectors. The device exhibited a clear photoresponse at room temperature from 0.8 µm to 3.5 µm, with responsivity of 5.39 A/W and specific detectivity of 2.01 × 1011 Jones at 1.8 µm. This materials–device co-design strategy integrates wavelength-selective CQD synthesis with planar pixel-level patterning, providing a versatile pathway for developing low-cost, solution-processed, multiband infrared photodetectors.",

keywords = "colloidal quantum dot, infrared, photodetector",

author = "Yingying Xu and Xiaomeng Xue and Lixiong Wu and Zhikai Gan and Menglu Chen and Qun Hao",

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doi = "10.3390/photonics13010089",

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AU - Xu, Yingying

AU - Xue, Xiaomeng

AU - Wu, Lixiong

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AU - Hao, Qun

PY - 2026/1

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N2 - Multispectral infrared detection plays a crucial role in advanced applications spanning environmental monitoring, military surveillance, and biomedical diagnostics, offering superior target identification accuracy compared to single-band imaging techniques. In this work, we synthesized four distinct bands of colloidal quantum dots (CQDs)—specifically, a cut-off of 1.3 µm with PbS CQDs and 1.8 µm, 2.6 µm, and 3.5 µm with HgTe CQDs—and employed them to construct planar multiband infrared photodetectors. The device exhibited a clear photoresponse at room temperature from 0.8 µm to 3.5 µm, with responsivity of 5.39 A/W and specific detectivity of 2.01 × 1011 Jones at 1.8 µm. This materials–device co-design strategy integrates wavelength-selective CQD synthesis with planar pixel-level patterning, providing a versatile pathway for developing low-cost, solution-processed, multiband infrared photodetectors.

AB - Multispectral infrared detection plays a crucial role in advanced applications spanning environmental monitoring, military surveillance, and biomedical diagnostics, offering superior target identification accuracy compared to single-band imaging techniques. In this work, we synthesized four distinct bands of colloidal quantum dots (CQDs)—specifically, a cut-off of 1.3 µm with PbS CQDs and 1.8 µm, 2.6 µm, and 3.5 µm with HgTe CQDs—and employed them to construct planar multiband infrared photodetectors. The device exhibited a clear photoresponse at room temperature from 0.8 µm to 3.5 µm, with responsivity of 5.39 A/W and specific detectivity of 2.01 × 1011 Jones at 1.8 µm. This materials–device co-design strategy integrates wavelength-selective CQD synthesis with planar pixel-level patterning, providing a versatile pathway for developing low-cost, solution-processed, multiband infrared photodetectors.

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KW - photodetector

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Multiband Infrared Photodetection Based on Colloidal Quantum Dot

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