Composition-tunable Transition Metal Dichalcogenide Nanosheets a Scalable, Solution-processable Method

Overview

Journal Nanoscale Horiz

Publisher Royal Society of Chemistry

Specialty Biotechnology

Date 2024 Feb 5

PMID 38315153

Authors

Rebekah A Wells

Nicolas J Diercks

Victor Boureau

Zhenyu Wang

Yanfei Zhao

Simon Nussbaum

Marc Esteve

Marina Caretti

Hannah Johnson

Andras Kis

Kevin Sivula

Affiliations

Soon will be listed here.

Abstract

The alloying of two-dimensional (2D) transition metal dichalcogenides (TMDs) is an established route to produce robust semiconductors with continuously tunable optoelectronic properties. However, typically reported methods for fabricating alloyed 2D TMD nanosheets are not suitable for the inexpensive, scalable production of large-area (m) devices. Herein we describe a general method to afford large quantities of compositionally-tunable 2D TMD nanosheets using commercially available powders and liquid-phase exfoliation. Beginning with MoWS nanosheets, we demonstrate tunable optoelectronic properties as a function of composition. We extend this method to produce MoWSe MoSSe, WSSe, and quaternary MoWSSe nanosheets. High-resolution scanning transmission electron microscopy (STEM) imaging confirms the atomic arrangement of the nanosheets, while an array of spectroscopic techniques is used to characterize the chemical and optoelectronic properties. This transversal method represents an important step towards upscaling tailored TMD nanosheets with a broad range of tunable optoelectronic properties for large-area devices.

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