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High-current MoS2 transistors with non-planar gate configuration.

Jun Lin1, Bin Wang1, Zhenyu Yang2

  • 1Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education & Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University, Changsha 410082, China.

Science Bulletin
|January 19, 2023
PubMed
Summary

Researchers developed advanced two-dimensional (2D) molybdenum disulfide (MoS2) transistors with an omega-shaped gate. This design enhances electrostatic control for high-performance field-effect transistors and logic gate applications.

Keywords:
High current densityMoS(2) transistorsNon-planarOmega-shaped gate

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • Shrinking transistor dimensions necessitate superior electrostatic control for ultra-thin semiconductor bodies.
  • Preserving intrinsic properties of two-dimensional (2D) semiconductors is crucial for device performance.
  • Gate configuration design plays a vital role in optimizing 2D semiconductor transistors.

Purpose of the Study:

  • To design and demonstrate a 2D MoS2 transistor with an enhanced gate configuration.
  • To investigate the impact of non-planar geometry on gate coupling and device performance.
  • To evaluate the potential for constructing logic gates using these novel transistors.

Main Methods:

  • Fabrication of 2D MoS2 transistors featuring an omega-shaped gate.
  • Utilizing non-planar geometry to improve local gate coupling.
  • Characterization of device performance, including current, transconductance, and logic gate functionality.

Main Results:

  • The omega-shaped non-planar transistors achieved a high current of 0.89 A/μm and transconductance of 32.7 μS/μm.
  • Demonstrated desirable current saturation, suitable for robust logic gate construction.
  • Successfully assembled inverters with a voltage gain of 26.6 and NAND gates, showcasing universal functionality.

Conclusions:

  • The omega-shaped gate design effectively enhances electrostatic control in 2D MoS2 transistors.
  • These transistors exhibit high performance and promise for advanced electronic applications.
  • This work presents a viable strategy for leveraging 2D materials in high-performance field-effect transistors and integrated circuits.