期刊
APPLIED PHYSICS LETTERS
卷 121, 期 2, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0100191
关键词
-
资金
- National Natural Science Foundation of China [62074029, 61804023, 61971108, 61905035, 62004029, 51905554]
- Key R&D Program of Sichuan Province [2022JDTD0020, 2022YFG0163, 2020ZHCG0038]
- Sichuan Science and Technology Program [2019YJ0198, 2020YJ0015, 2019YFG0222, 2022ZHCG0041]
- Aeronautical Science Foundation [20200024080001]
- Fundamental Research Funds for the Central Universities [ZYGX2019Z002]
A nanoscale photodetector based on WSe2/MoS2 heterostructure with graphene/indium tin oxide (ITO) hybrid electrodes has been fabricated. The use of vdWs contacts and reduced Schottky barrier improves the responsivity, detectivity, and response speed of the photodetector.
A nanoscale photodetector is a crucial part of intelligent imaging and wireless communication devices. Building van der Waals (vdWs) heterostructures based on two-dimensional transition metal dichalcogenides is thought to be a smart approach for achieving nanoscale photodetectors. However, the pinning effect induced by surface states, defects, and metal-induced gap states during the fabrication process of vdWs heterostructures and contacting electrodes leads to a large Schottky barrier and consequently limits the photoresponse of vdWs heterostructures. In this study, a photodetector based on the WSe2/MoS2 heterostructure with graphene (Gr)/indium tin oxide (ITO) hybrid electrodes has been fabricated. The vdWs contacts established between the exfoliated graphene layers and WSe2/MoS2 heterostructure are able to get rid of lattice damages caused by atom bombardment during the deposition of metal electrodes. In addition, the reduced Schottky barrier at graphene/heterostructure interfaces facilitates the transport of carriers. Experimental results show that the photodetector based on WSe2/MoS2 heterostructures with Gr/ITO hybrid electrodes exhibits a high responsivity of up to 1236.5A W-1, a detectivity of up to 1.23 x 10(13) Jones, and a fast response of 270/130 mu s to light from the ultraviolet to near-infrared range.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据