Recent progress on transition metal diselenides from formation and modification to applications

Area of Science:

• Materials Science
• Nanotechnology
• Solid State Physics

Background:

• Graphene's rise spurs interest in 2D materials, particularly transition metal dichalcogenides (TMDCs).
• Monolayer/few-layer TMDCs offer advantages like direct band gaps and active sites for catalysis and optoelectronics.
• Transition metal diselenides (TMDSs) present distinct characteristics compared to TMDCs.

Purpose of the Study:

• To provide a comprehensive review of transition metal diselenides (TMDSs).
• To detail the structures, synthesis, properties, modifications, and applications of TMDSs.
• To discuss the future perspectives of TMDSs as a promising class of 2D materials.

Main Methods:

• Literature review and synthesis of existing research on TMDSs.
• Analysis of structural, electronic, and chemical properties of TMDSs.
• Compilation of current and potential applications across various fields.

Main Results:

• TMDSs, like MoSe2, exhibit a more stable 1T phase, larger interlayer spacing, and smaller band gaps than TMDCs (e.g., MoS2).
• The metallic properties of Selenium in TMDSs offer unique advantages.
• TMDSs show significant potential in catalysis, optoelectronics, and energy conversion/storage.

Conclusions:

• TMDSs are a compelling research area branching from TMDCs, offering unique properties.
• Their distinct characteristics position them as highly attractive for advanced technological applications.
• Further research into TMDSs is crucial for unlocking their full potential.