Degenerately Doped Transition Metal Dichalcogenides as Ohmic Homojunction Contacts to Transition Metal Dichalcogenide Semiconductors

Abstract

In search of an improved strategy to form low resistance contacts to MoS2 and related semiconducting transition metal dichalcogenides, we use ab initio density functional electronic structure calculations in order to determine the equilibrium geometry and electronic structure of MoO3/MoS2 and MoO2/MoS2 bilayers. Our results indicate that, besides a rigid band shift associated with charge transfer, the presence of molybdenum oxide modifies the electronic structure of MoS2 very little. We find that the charge transfer in the bilayer provides a sufficient degree of hole doping to MoS2, resulting in a highly transparent contact region.

arXiv comment14 pages, 9 figures

References in corpus (9)

• Van der Waals density functionals applied to solids
• High Performance Single Layered WSe2 p-FETs with Chemically Doped Contacts
• Carbon Nanotubes as Schottky Barrier Transistors
• Band alignment of two-dimensional transition metal dichalcogenides: application in tunnel field effect transistors
• Chloride Molecular Doping Technique on 2D Materials: WS2 and MoS2
• Designing electrical contacts to MoS${}_2$ monolayers: A computational study
• Low-Resistance 2D/2D Ohmic Contacts: A Universal Approach to High-Performance WSe2, MoS2, and MoSe2 Transistors
• High-Mobility Holes in Dual-Gated WSe${}_2$ Field-Effect Transistors
• Ohmic contacts to 2D semiconductors through van der Waals bonding

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