tag: transition-metal dichalcogenides

Reducing Contact Resistance in Developing Transistors Based On 2D Materials
By Technical Paper Link - 10 Mar, 2023 - Comments: 0

A new technical paper titled "WS2 Transistors with Sulfur Atoms Being Replaced at the Interface: First-Principles Quantum-Transport Study" was published by researchers at National Yang Ming Chiao Tung University. Abstract "Reducing the contact resistance is one of the major challenges in developing transistors based on two-dimensional materials. In this study, we perform first-principles ... » read more

Research Bits: March 6
By Jesse Allen - 06 Mar, 2023 - Comments: 0

2D TMDs on silicon Engineers at MIT, University of Texas at Dallas, Institute for Basic Science, Sungkyunkwan University, Washington University in St. Louis, University of California at Riverside, ISAC Research, and Yonsei University found a way to grow 2D materials on industry-standard silicon wafers while preserving their crystalline form. Using a new “nonepitaxial, single-crystalline g... » read more

2D Semiconductor Materials Creep Toward Manufacturing
By Katherine Derbyshire - 16 Feb, 2023 - Comments: 0

As transistors scale down, they need thinner channels to achieve adequate channel control. In silicon, though, surface roughness scattering degrades mobility, limiting the ultimate channel thickness to about 3nm. Two-dimensional transition metal dichalcogenides (TMDs), such as MoS2 and WSe2, are attractive in part because they avoid this limitation. With no out-of-plane dangling bonds and at... » read more

Control of the Schottky barrier height in monolayer WS2 FETs using molecular doping (NIST)
By Technical Paper Link - 07 Sep, 2022 - Comments: 0

A new research paper titled "Control of the Schottky barrier height in monolayer WS2 FETs using molecular doping" was published by researchers at NIST, Theiss Research, Naval Research Laboratory, and Nova Research. Abstract: "The development of processes to controllably dope two-dimensional semiconductors is critical to achieving next generation electronic and optoelectronic devices. Unde... » read more

New Materials Open Door To New Devices
By Katherine Derbyshire - 21 Jul, 2022 - Comments: 0

Integrating 2D materials into conventional semiconductor manufacturing processes may be one of the more radical changes in the chip industry’s history. While there is pain and suffering associated with the introduction of any new materials in semiconductor manufacturing, transition metal dichalcogenides (TMDs) support a variety of new device concepts, including BEOL transistors and single-... » read more

Interfacial ferroelectricity in marginally twisted 2D semiconductors
By Technical Paper Link - 08 Mar, 2022 - Comments: 0

Abstract "Twisted heterostructures of two-dimensional crystals offer almost unlimited scope for the design of new metamaterials. Here we demonstrate a room temperature ferroelectric semiconductor that is assembled using mono- or few-layer MoS2. These van der Waals heterostructures feature broken inversion symmetry, which, together with the asymmetry of atomic arrangement at the interface of tw... » read more

2D Semiconductors Make Progress, But Slowly
By Katherine Derbyshire - 28 Feb, 2022 - Comments: 2

Researchers are looking at a variety of new materials at future nodes, but progress remains slow. In recent years, 2D semiconductors have emerged as a leading potential solution to the problem of channel control in highly scaled transistors. As devices shrink, the channel thickness should shrink proportionally. Otherwise, the gate capacitance won’t be large enough to control the flow of cu... » read more

High-performance flexible nanoscale transistors based on transition metal dichalcogenides
By Technical Paper Link - 24 Aug, 2021 - Comments: 0

Read the paper here. Published June 17, 2021, Nature Electronics. Abstract Two-dimensional (2D) semiconducting transition metal dichalcogenides could be used to build high-performance flexible electronics. However, flexible field-effect transistors (FETs) based on such materials are typically fabricated with channel lengths on the micrometre scale, not benefitting from the short-channel advan... » read more

The Good And Bad Of 2D Materials
By Katherine Derbyshire - 27 Feb, 2019 - Comments: 0

Despite years of warnings about reaching the limits of silicon, particularly at leading-edge process nodes where electron mobility is limited, there still is no obvious replacement. Silicon’s decades-long dominance of the integrated circuit industry is only partly due to the material’s electronic properties. Germanium, gallium arsenide, and many other semiconductors offer superior mobili... » read more

System Bits: Oct. 11
By Ed Sperling - 11 Oct, 2016 - Comments: 0

Carbon Is So 2015 Researchers at MIT have created a supercapacitor that relies on a material other than carbon. This new class of materials, called metal-organic frameworks (MOFs), are a porous and sponge-like, according to MIT, tthereby providing a much larger surface area than carbon. As with most things electrical, more surface area is essential for superconductors. The problem the re... » read more

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