title: Low-Voltage and High-Performance Multilayer MoS2Field-Effect Transistors with Graphene Electrodes.
abstract: Atomically thin two-dimensional (2D) materials are attractive because they have excellent material properties and channel length scalability. Fabrication of complex structures from these materials is also relatively easy. Accordingly, 2D materials such as molybdenum disulfide (MoS2) have been intensively studied because of their novel properties for advanced electronics and optoelectronics. This study realizes the low-voltage and high-performance field-effect transistors with chemical vapor deposition-grown single layer graphene employed as the thinnest electrode and semiconducting multilayer (ML) MoS2utilized as a channel material. The two-terminal mobility of graphene-contacted ML MoS2using 15 nm Al2O3as the top-gate dielectric layer is 131.2 cm2/(V s) at room temperature, which is higher than that of the previously reported metal/graphene-contacted MoS2. The result demonstrates that van der Waals bonding at the graphene-MoS2interfaces and high-k dielectric provide an important step toward the realization of high-performance and low-voltage thin-film transistors.
authors.affiliation: Department of Physics and Graphene Research Institute, Sejong University , Seoul 143-747, Korea.|Department of Physics, Motilal Nehru National Institute of Technology , Allahabad 211004, India.
authors.forename: Arun Kumar
authors.identifier: http://orcid.org/0000-0002-8343-2612
authors.initials: AK
authors.lastname: Singh
authors.affiliation: Center for Nanometrology, Korea Research Institute of Standards and Science , Daejeon 305-340, Korea.
authors.forename: Chanyong
authors.initials: C
authors.lastname: Hwang
authors.affiliation: Department of Physics and Graphene Research Institute, Sejong University , Seoul 143-747, Korea.
authors.forename: Jonghwa
authors.initials: J
authors.lastname: Eom
keywords: graphene; low voltage; mobility; molybdenum disulfide (MoS2); top-gated field-effect transistor; transparent electrodes