Molybdenum Ditelluride Thin Films and Electronic Devices

Molybdenum ditelluride (MoTe2) is a layered transition metal dichalcogenide that has emerged as a versatile platform for next-generation electronic and optoelectronic devices. In its semiconducting 2H phase, MoTe2 exhibits a bandgap comparable to silicon and high carrier mobility, making it suitable for field-effect transistors (FETs) and photodetectors. The semimetallic 1T′ phase offers topologically non-trivial states and potential superconductivity, enabling applications in memory, logic and quantum devices. Thin films of MoTe2 can be obtained by exfoliation, chemical vapour deposition and wafer-scale epitaxial growth, yielding monolayer to few-layer structures with tunable thickness. Control over phase transitions between 2H and 1T′ polymorphs through thermal annealing, strain, electrostatic gating or chemical treatment allows dynamic modulation of electrical and optical properties. Encapsulation strategies address environmental instability, while lithographic patterning and heterostructuring with insulating layers have advanced device integration. Recent advancements demonstrate high-performance p-type transistors, robust phase-change memories and integrated photonic architectures. The inherent flexibility and atomic thinness of MoTe2 films also suggest compatibility with wearable electronics and neuromorphic computing. Collectively, these characteristics highlight the global significance of MoTe2 thin films as a multifunctional material bridging fundamental research and practical applications.

Research from Nature Portfolio

Recent studies have demonstrated the scalable fabrication of high-quality p-type MoTe2 transistor arrays. By transforming a polymorphic semimetal into a single-crystalline 2H phase on four-inch wafers, researchers achieved minimal contact resistance and near-zero Schottky barrier heights through Fermi-level tuning of semimetallic electrodes. This approach yielded on/off current ratios exceeding 10^5 and p-type current densities above 7 μA μm−1 in field-effect transistors, showcasing wafer-scale integration potential. Foundational work has also revealed pressure-enhanced superconductivity in bulk MoTe2, with a dome-shaped transition reaching temperatures above 8 K under high pressure, thereby illuminating the interplay between topological semimetallic states and superconductivity.

Molybdenum Ditelluride Thin Films and Electronic Devices publication trend

The graph below shows the total number of articles in molybdenum ditelluride thin films and electronic devices across all publications each year (not limited to Nature Index journals).

Technical terms

Transition metal dichalcogenide (TMD): Layered compounds with the formula MX2, where M is a transition metal and X is a chalcogen, known for tunable electronic phases.

2H and 1T′ phases: Polymorphic crystal structures of MoTe2, where 2H is semiconducting and 1T′ is semimetallic with distinct symmetry and electronic properties.

Fermi level: The chemical potential for electrons in a solid at absolute zero, determining charge carrier distribution in devices.

Schottky barrier: An energy barrier at the metal–semiconductor junction affecting charge injection and contact resistance.

Field-effect transistor (FET): A three-terminal device controlling current through a semiconductor channel by an applied gate voltage.

References

1. Exploring the Surface Oxidation and Environmental Instability of 2H‐/1T’‐MoTe2 Using Field Emission‐Based Scanning Probe Lithography. Advanced Materials (2023).
2. Advances in two‐dimensional molybdenum ditelluride (MoTe2): A comprehensive review of properties, preparation methods, and applications. SusMat (2024).
3. Deterministic Polymorphic Engineering of MoTe2 for Photonic and Optoelectronic Applications. Advanced Functional Materials (2023).
4. Fabrication of p-type 2D single-crystalline transistor arrays with Fermi-level-tuned van der Waals semimetal electrodes. Nature Communications (2023).
5. Strain-Induced 2H to 1T′ Phase Transition in Suspended MoTe2 Using Electric Double Layer Gating. ACS Nano (2023).
6. Superconductivity in Weyl semimetal candidate MoTe2. Nature Communications (2016).