Defects Engineering with Multiple Dimensions in Thermoelectric Materials

Author:

Zhao Chenxi1,Li Zhou1ORCID,Fan Tianjiao1,Xiao Chong12ORCID,Xie Yi12

Affiliation:

1. Hefei National Laboratory for Physical Sciences at Microscale, CAS Center for Excellence in Nanoscience, University of Science & Technology of China, Hefei, Anhui 230026, China

2. Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230031, China

Abstract

Going through decades of development, great progress in both theory and experiment has been achieved in thermoelectric materials. With the growing enhancement in thermoelectric performance, it is also companied with the complexation of defects induced in the materials. 0D point defects, 1D linear defects, 2D planar defects, and 3D bulk defects have all been induced in thermoelectric materials for the optimization of thermoelectric performance. Considering the distinct characteristics of each type of defects, in-depth understanding of their roles in the thermoelectric transport process is of vital importance. In this paper, we classify and summarize the defect-related physical effects on both band structure and transport behavior of carriers and phonons when inducing different types of defects. Recent achievements in experimental characterization and theoretical simulation of defects are also summarized for accurately determining the type of defects serving for the design of thermoelectric materials. Finally, based on the current theoretical and experimental achievements, strategies engaged with multiple dimensional defects are reviewed for thermoelectric performance optimization.

Funder

Fundamental Research Funds for the Central Universities

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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