Chemical treatments of Monolayer Transition Metal Dichalcogenides and Their Prospect in Optoelectronic Applications

TL;DR

This review discusses chemical treatment strategies for monolayer TMDs to enhance their optoelectronic properties by passivating defects and unwanted doping, aiming to facilitate practical device applications.

Contribution

It provides a systematic overview of chemical treatment methods, mechanisms, and future prospects for improving monolayer TMDs in optoelectronic devices.

Findings

Chemical treatments improve photoluminescence yield.

Surface passivation enhances charge transport.

Understanding mechanisms guides better treatment design.

Abstract

The interest in obtaining high-quality monolayer transition metal dichalcogenides (TMDs) for optoelectronic device applications has been growing dramatically. However, the prevalence of defects and unwanted doping in these materials remains a challenge, as they both limit optical properties and device performance. Surface chemical treatments of monolayer TMDs have been effective in improving their photoluminescence yield and charge transport properties. In this scenario, a systematic understanding of the underlying mechanism of chemical treatments will lead to a rational design of passivation strategies in future research, ultimately taking a step toward practical optoelectronic applications. We will therefore describe in this review the strategies, progress, mechanisms, and prospects of chemical treatments to passivate and improve the optoelectronic properties of TMDs.