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Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
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Contact engineering for 2D materials and devices.

Daniel S Schulman1, Andrew J Arnold, Saptarshi Das

  • 1Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA. sud70@psu.edu.

Chemical Society Reviews
|March 3, 2018
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Summary
This summary is machine-generated.

This review explores contacts for two-dimensional (2D) layered materials, crucial for their electronic properties. It details challenges like Fermi level pinning and strategies for improving 2D material device performance.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Two-dimensional (2D) layered materials offer unique electronic properties for scientific study and technological applications.
  • Effective electrical contacts are essential for accessing and utilizing the properties of 2D materials in devices.
  • Current contact limitations hinder the full potential and performance of 2D material-based technologies.

Purpose of the Study:

  • To provide a comprehensive overview of the fundamental understanding and significance of contacts in 2D materials.
  • To discuss various strategies for engineering and improving the quality of electrical contacts to 2D materials.
  • To highlight unresolved challenges and future research directions in 2D material contacts.

Main Methods:

  • Review of existing literature on 2D material contacts.
  • Elucidation of physical phenomena at metal/2D material interfaces, including Fermi level pinning.
  • Categorization and explanation of contact engineering techniques.

Main Results:

  • Detailed explanation of Fermi level pinning and its impact on contact behavior (Schottky vs. Ohmic).
  • Overview of diverse contact engineering strategies: interlayer contacts, phase engineering, basal vs. edge plane contacts.
  • Identification of key challenges such as contact scaling and reliability.

Conclusions:

  • Understanding and engineering contacts are critical for advancing 2D material science and technology.
  • Advanced contact strategies are necessary to overcome fundamental limitations and unlock device potential.
  • Further research is needed to address issues like contact scaling for future applications.