Mixed-Dimensional Nanowires/Nanosheet Heterojunction of GaSb/Bi₂O₂Se for Self-Powered Near-Infrared Photodetection and Photocommunication.

IF 36.3 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2025-06-03 DOI:10.1007/s40820-025-01793-2

Guangcan Wang, Zixu Sa, Zeqi Zang, Pengsheng Li, Mingxu Wang, Bowen Yang, Xiaoyue Wang, Yanxue Yin, Zai-Xing Yang

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引用次数: 0

Abstract

With high surface-to-volume ratio, the abundant surface states and high carrier concentration are challenging the near-infrared photodetection behaviors of narrow band gap semiconductors nanowires. In this study, the narrow band gap semiconductor of Bi₂O₂Se nanosheets (NSs) is adopted to construct mixed-dimensional heterojunctions with GaSb nanowires (NWs) for demonstrating the impressive self-powered NIR photodetection. Benefiting from the built-in electric field of ~ 140 meV, the as-constructed NW/NS mixed-dimensional heterojunction self-powered photodetector shows the low dark current of 0.07 pA, high I_light/I_dark ratio of 82 and fast response times of < 2/2 ms at room temperature. The self-powered photodetector performance can be further enhanced by fabricating the NW array/NS mixed-dimensional heterojunction by using a contact printing technique. The excellent photodetection performance promises the as-constructed NW/NS mixed-dimensional heterojunction self-powered photodetector in imaging and photocommunication.

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GaSb/Bi2O2Se混合维纳米线/纳米片异质结用于自供电近红外光探测和光通信。

高表面体积比、丰富的表面态和高载流子浓度对窄带隙半导体纳米线的近红外探测性能提出了挑战。在本研究中，采用窄带隙半导体Bi2O2Se纳米片（NSs）与GaSb纳米线（NWs）构建混合维异质结，展示了令人印象深刻的自供电近红外光探测。利用~ 140 meV的内置电场，构建的NW/NS混合维异质结自供电光电探测器显示出0.07 pA的低暗电流，高达82的光/暗比和快速的响应时间

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.