Nanostructured and Heterostructured 2D Materials for Thermoelectrics

Qin-Yi Li,1,5,*, Email

Qing Hao,2,*,Email

Tianhui Zhu,3

Mona Zebarjadi,3,4,*,Email 

Koji Takahashi1,5

1Department of Aeronautics and Astronautics, Kyushu University, Fukuoka 819-0395, Japan

2Department of Aerospace and Mechanical Engineering, University of Arizona, 1130 N Mountain Ave, Tucson, AZ, 85721, USA

3Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, Virginia, 22904, USA.

4Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia, 22904, USA.

5International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Japan

Abstract

The rapid development in the synthesis and device fabrication of two-dimensional (2D) materials provides new opportunities for their wide applications in a variety of fields including thermoelectric energy conversion, thermal management, and thermal logics. As one important research direction, the possibly poor thermoelectric performance of the pristine 2D materials can be dramatically improved with patterned nanostructures, and stacking of different 2Ds to form layered heterostructures, as well as electrostatic gating, which allow the fine-tuning of both the quasi Fermi level and phonon transport. This article reviews the recent advancement in this direction, with an emphasis on both fundamental understanding and practical problems.

Nanostructured and Heterostructured 2D Materials for Thermoelectrics