Short channel monolayer MoS field-effect transistors defined by SiO nanofins down to 20 nm.

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ID: 44471
2019
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Abstract
Layered semiconductors such as transition metal dichalcogenides (TMDs) with proper bandgaps complement the zero-bandgap drawback of graphene, demonstrating great potential for post-silicon complementary metal-oxide-semiconductor technology. Among the TMD family, molybdenum disulfide (MoS) is highly attractive for its atomically thin body, large bandgap and decent mechanical and chemical stability. However, current nanofabrication techniques hardly satisfy the requirements of short channel and convenient preparation simultaneously. Here, we demonstrate a simple and effective approach to fabricate short channel chemical vapor deposition (CVD) monolayer MoS field-effect transistors (FET) with channel length down to 20 nm. Electron-beam lithography based on high-resolution negative-tone hydrogen silsesquioxane electron resists were applied to create 20 nm wide SiO lines, defining the short channel length. The 20 nm MoS FET displays ON-sate current in excess of 100 μA μm. The corresponding current ON/OFF ratio at room temperature reaches 10. We carefully studied the short channel effect of as-fabricated MoS FETs. Combining with the large-scale growth of CVD method, our results will pave a way for short channel device applications based on atomically thin two-dimensional semiconductors.
Reference Key
bi2019shortnanotechnology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Bi, Kaixi;Liu, Huaizhi;Chen, Yiqin;Luo, Fang;Shu, Zhiwen;Lin, Jun;Liu, Song;Liu, Huawei;Zeng, Zanyang;Dai, Peng;Zhu, Mengjian;Duan, Huigao;
Journal Nanotechnology
Year 2019
DOI
10.1088/1361-6528/ab13cc
URL
Keywords
flexible image sensor low voltage organic electrochemical transistors organic phototransistors volumetric transport

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