Controlled Electrochemical Deposition of Large‐Area MoS₂ on Graphene for High‐Responsivity Photodetectors

Abstract

Controllable creating of wafer-scale homogeneous vertical or parallel 2D heterostructures with low cost by the van der Waals stacking or covalently bonded stitching of 2D layered materials, such as graphene, hexagonal boron nitride, and transition-metal dichalcogenides, is of great challenge. In this paper, a new green growth strategy for the fabrication of high-quality largearea and low-cost vertical MoS 2 /graphene heterostructures has been successfully demonstrated via electrochemical deposition in water solution, followed by an annealing process in chemical vapour deposition system for the first time. The vertical MoS 2 /graphene heterostructures have been systematically investigated by the combined use of Raman spectroscopy, atomic force microscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. This simple, reliable, and environmentally friendly growth strategy on conducting monolayer graphene in a controlled manner opens up a new way for producing low-cost, large-area, and high-quality vertical MoS 2 /graphene heterostructures, which have promising applications not only in electronics and optoelectronics but also in the fields of catalysis and renewable energy.

Electronic and Optoelectronic Applications Based on ReS2

“…The well‐established CVD method has been utilized widely to synthesize large‐scale and uniform crystals, such as graphene and TMDs . Different from the exfoliation method, CVD is a bottom‐up method which is essential to large‐scale applications.…”

An Electrodeposited MXene‐Ti3C2Tx Nanosheets Functionalized by Task‐Specific Ionic Liquid for Simultaneous and Multiplexed Detection of Bladder Cancer Biomarkers

“…The overall resistance (R T ) of the external circuit of the system can be calculated using the following equation. [24]…”

“…Recent studies have revealed that 2D materials, such as GO, MoS 2 , and CNT can be easily deposited onto a specific electrode substrate with controlled film morphology and thickness via the electrodeposition method. [21,23,24] Generally, MXNSs have high, negative zeta potentials owing to the surface terminal groups (such as F, OH, and O), which afford their hydrophilic nature and render them suitable for forming stable colloids containing few-layer MXNSs in various polar solvents. [25] Additionally, redox-capable transition metal layers on the surface of MXNSs enable the latter to be used in the electrochemical deposition method.…”

Two‐Dimensional Electrocatalysts for Efficient Reduction of Carbon Dioxide

“…Xu et al. used monolayer CVD graphene as the substrate and electrodeposited large‐area, high‐quality vertical MoS 2 , with a thickness of 5–150 nm, onto it from an aqueous solution; this was then annealed in a CVD system . Homogeneous wafer‐scale MoS 2 films on monolayer graphene were achieved with clean and sharp interfaces.…”