Two-dimensional MoS$_{2}$ as a new material for electronic devices

Abstract

Abstract:We overview fundamental properties, preparation techniques, and potential device applications of singleand few-monolayer-thick molybdenum disulfide MoS 2 belonging to a new emerging class of materials: 2-dimensional semiconductors. To a large extent, the interest in the 2-dimensional materials is fueled by the quest for alternatives to graphene, which is hardly suitable for electronic devices because of the lack of a band gap. A unique combination of physical properties, including flexibility, high electron mobility, and optical transparency combined with a large band gap tunable from indirect 1.2 eV for bulk to direct 1.9 eV for a monolayer, make MoS 2 attractive for a variety of electronic and optoelectronic devices. The first device demonstrations are very encouraging: field-effect transistors with high current ON/OFF ratios, high-sensitivity phototransistors, logic circuits, and amplifiers based on monolayer-MoS 2 have been demonstrated. The layered structure of MoS 2 with other transition-metal dichalcogenides (WS 2 , WSe 2 , MoSe 2 , etc.) makes it possible to grow ultrathin, so-called van der Waals heterostructures with very abrupt interfaces and low defect density and paves the way for fabricating multilayered materials for novel electronic and optical devices.However, further progress towards potential commercialization of monolayer-MoS 2 -based devices requires serious efforts in the development of scalable fabrication techniques capable of producing large-area electronic-quality material.

Two-Dimensional Materials for Sensing: Graphene and Beyond

“…Molybdenum disulfide (MoS2), one of the most popular semiconducting TMDs [144] has shown great promise for a variety of applications in electronics and optoelectronics [145][146][147][148][149]. As expected, gas sensors made from MoS2 have demonstrated excellent sensing characteristics such as high sensitivity, fast response time and good stability [80][81][82][83]85].…”

Investigation of indirect excitons in bulk 2H-MoS2using transmission electron energy-loss spectroscopy

“…Layered materials such as transition metal dichalcogenides (TMDs) have been subject to a large number of scientific investigations due to their unusual electronic properties. They are used in established and experimental applications such as lubrication, catalysis, energy storage and electronics [1][2][3][4]. One interesting characteristic is the occurrence of excitons in semiconducting TMDs.…”

“…They are used in established and experimental applications such as lubrication, catalysis, energy storage and electronics. [1][2][3][4] One interesting characteristics is the occurrence of excitons in semiconducting TMDs. Those electronically neutral quasi-particles are composed of electron-hole pairs in a Coulomb-bound, hydrogen-like state.…”

Adsorption and Diffusion of Lithium on Monolayer Transition Metal Dichalcogenides (MoS2(1–x)Se2x) Alloys

“…While they possess weak van der Waals forces between layers, they have strong chemical bonding within the layers, since these structures are suitable for exfoliation to 2D materials. After this process, their indirect band gaps which they have in 3D form (see the Supporting Information, SI), turn to direct gaps between 1 and 2 eV. , These materials with band gaps corresponding to the visible region of the spectrum have potential applications for a variety of electronic and optoelectronic applications and also in solar cells. − There have been several studies about TMDs to investigate their properties in various situations. − In particular, they are suitable materials for energy storage, , such as lithium ion battery (LIB), supercapacitors, and also for hydrogen evolution reactions. , For example, monolayer MoS 2 has a lower Li ion diffusion barrier compared to graphene and has a high energy capacity of 1200 mAh/g , while graphene has that of 600–900 mAh/g. , This make it a potential material for anodes of LIB, , and also MoS 2 nanoribbon as a promising cathode material for rechargeable Mg batteries . Recently, mesoporous MoSe 2 has been synthesized, and it has a reversible lithium storage capacity of 630 mAh/g for at least 35 cycles .…”