Large-Area Aiming Synthesis of WSe2 Monolayers

TL;DR

This paper presents a novel method for synthesizing large-area WSe2 monolayers by introducing hydrogen during the selenization process, enabling growth of high-quality monolayer flakes.

Contribution

It demonstrates a new synthesis technique for large-area WSe2 monolayers using hydrogen activation, addressing previous challenges in transition metal selenide growth.

Findings

Successful growth of large WSe2 monolayer flakes

Hydrogen activation enhances selenization process

Potential for scalable 2D material production

Abstract

The monolayer transition metal dichalcogenides have recently attracted much attention owing to their potential in valleytronics, flexible and low-power electronics and optoelectronic devices. Recent reports have demonstrated the growth of large-size 2-dimensional MoS2 layers by the sulfurization of molybdenum oxides. However, the growth of transition metal selenide monolayer has still been a challenge. Here we report that the introduction of hydrogen in the reaction chamber helps to activate the selenization of WO3, where large-size WSe2 monolayer flakes or thin films can be successfully grown.