Scaling Properties of Polycrystalline Graphene: A Review

TL;DR

This review discusses how the microstructure of polycrystalline graphene influences its electrical, mechanical, and thermal properties, providing insights for optimizing its use in advanced electronic applications.

Contribution

It offers a comprehensive summary of experimental and simulation studies linking microstructure to large-scale properties of polycrystalline graphene, guiding future improvements.

Findings

Microstructure significantly affects charge mobility and thermal conductivity.

Grain size and defects are key factors influencing material properties.

The review highlights strategies for optimizing polycrystalline graphene for electronic applications.

Abstract

We present an overview of the electrical, mechanical, and thermal properties of polycrystalline graphene. Most global properties of this material, such as the charge mobility, thermal conductivity, or Young's modulus, are sensitive to its microstructure, for instance the grain size and the presence of line or point defects. Both the local and global features of polycrystalline graphene have been investigated by a variety of simulations and experimental measurements. In this review, we summarize the properties of polycrystalline graphene, and by establishing a perspective on how the microstructure impacts its large-scale physical properties, we aim to provide guidance for further optimization and improvement of applications based on this material, such as flexible and wearable electronics, and high-frequency or spintronic devices.