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Graphene electrode-enhanced InSe/WSe2 van der Waals heterostructure for high-performance broadband photodetector with imaging capabilities
Journal of Alloys and Compounds ( IF 5.8 ) Pub Date : 2024-09-04 , DOI: 10.1016/j.jallcom.2024.176356
Shrouq H. Aleithan , Umer Younis , Zakia Alhashem , Waqas Ahmad

2D vdWs heterostructure is realized as a powerful technique for tuning the optoelectronic properties and thus developing the future generation optoelectronic devices, especially for photodetectors. However, photodetectors based on 2D vdWs heterostructure suffer from responsivity, detectivity, and large photoresponse speed inhibits their applications in further diverse areas. Here, a graphene electrode-based InSe/WSe2 vdWs heterostructure is proposed aiming to develop a high-performance photodetector. Owing to the graphene electrode, the heterostructure devices build a strong electronic field at the surface of the InSe/WSe2 vdWs heterostructure. As a result, the device shows excellent optoelectronic characteristics such as broad band photoresponse ranging from 532 nm (visible) to 1100 nm (near infrared) including a high responsivity of 829.7 AW−1, a detectivity of 2.81×1014 Jones and a rapid photoresponse of 10 µs. Significantly, as presented photodetector device is applied in an imaging system, showcasing its capability for high-contrast photodetection. These findings highlight that the potential of graphene electrode integration in 2D vdWs heterostructure provides an effective roadmap for developing the advancing next generation of optoelectronic devices.

中文翻译:


石墨烯电极增强InSe/WSe2范德华异质结构,用于具有成像功能的高性能宽带光电探测器



二维 vdWs 异质结构被实现为一种强大的技术,用于调节光电特性,从而开发下一代光电器件,特别是光电探测器。然而,基于2D vdWs异质结构的光电探测器存在响应率、探测率和较大的光响应速度等问题,限制了其在更多领域的应用。这里,提出了一种基于石墨烯电极的InSe/WSe2 vdWs异质结构,旨在开发高性能光电探测器。由于石墨烯电极的存在,异质结构器件在 InSe/WSe2 vdWs 异质结构表面建立了强电场。因此,该器件表现出优异的光电特性,例如从532 nm(可见光)到1100 nm(近红外)的宽带光响应,包括829.7 AW−1的高响应度、2.81×1014 Jones的探测率和快速光响应10 µs。值得注意的是,所提出的光电探测器装置应用于成像系统,展示了其高对比度光电探测的能力。这些发现凸显了石墨烯电极集成在二维 vdW 异质结构中的潜力,为开发先进的下一代光电器件提供了有效的路线图。
更新日期:2024-09-04
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