# Outstanding Room‐Temperature Thermoelectric Performance of n‐type Mg<sub>3</sub>Bi<sub>2</sub>‐Based Compounds Through Synergistically Combined Band Engineering Approaches

https://mdr.nims.go.jp/datasets/3be1efb7-df66-4d4c-91c6-b10e0d41afbd

## File

- [Advanced Functional Materials--Outstanding Room-Temperature Thermoelectric Performance of n-type Mg3Bi2-based Compounds through Synergistically Combined Band Engineering Approaches.pdf](https://mdr.nims.go.jp/filesets/82193c95-8915-4376-911e-ecfd8ee903e3/download) ([Detail](https://mdr.nims.go.jp/filesets/82193c95-8915-4376-911e-ecfd8ee903e3.md))

## Id

3be1efb7-df66-4d4c-91c6-b10e0d41afbd

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-11-23T06:19:20.166771Z

## Updated at

2024-11-25T07:30:32.125199Z

## Published at

2024-11-25T07:30:32.199431Z

## Doi



## First published url

https://doi.org/10.1002/adfm.202407017

## Date published

2024-08-01

## Recorded date published

2024-10

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Outstanding Room‐Temperature Thermoelectric Performance of n‐type Mg<sub>3</sub>Bi<sub>2</sub>‐Based
    Compounds Through Synergistically Combined Band Engineering Approaches
  title_type: original
  lang: en

## Description

- description: Thermoelectric cooling materials based on Bi2Te3 have a long history
    of unsurpassed performance near room temperature. Recently, research into price-competitive
    Mg3(Bi, Sb)2-based materials have been focused on replacing traditional cooling
    materials. Here, we investigated the thermoelectric properties of Mg3.2Bi1.998−xSbxTe0.002Cu0.005
    (x = 0.0, 0.1, 0.2, 0.3, 0.4, and 0.5) polycrystalline compounds. In all temperature
    regions, electrical resistivity and Seebeck coefficient are increased with Sb
    concentration. The electronic transport properties of Sb-alloyed compounds are
    maximized by synergistically combined band engineering approaches such as band
    structure change caused by lattice strain, increased electronic density of states,
    and chemical potential shift, leading to exceptionally high-power factor values
    of over 3.0 mW m−1 K−2 at room temperature. Furthermore, with increasing Sb content,
    thermal conductivity values are systematically reduced due to the promotion of
    alloy scattering of phonons and suppression of the bipolar contribution. Consequently,
    these multiple approaches significantly enhance thermoelectric performance, resulting
    in an enhancement of thermoelectric figure-of-merit zT above 1.1 at 348–423 K.
    Additionally, a 〖zT〗_avg of 1.1 is recorded at 300–450 K, making it an unrivaled
    value among the reported n-type Mg3Bi2-based thermoelectric materials. Overall,
    this work demonstrates that Mg3Bi2-based materials are more promising for thermoelectric
    cooling applications compared to Bi2Te3-based materials.
  description_type: abstract
  lang: und

## Creator

- name: Hyunyong Cho
  role: author
  organization: National Institute for Materials Science
- name: Song Yi Back
  role: author
  orcid: https://orcid.org/0009-0000-8890-1484
  organization: National Institute for Materials Science
- name: Naoki Sato
  role: author
  orcid: https://orcid.org/0000-0002-6429-0591
  organization: National Institute for Materials Science
- name: Zihang Liu
  role: author
  orcid: https://orcid.org/0000-0002-2040-1632
  organization: National Institute for Materials Science
- name: Weihong Gao
  role: author
  orcid: https://orcid.org/0000-0003-3656-4206
  organization: National Institute for Materials Science
- name: Longquan Wang
  role: author
  orcid: https://orcid.org/0009-0009-9910-9770
  organization: National Institute for Materials Science
- name: Hieu Duy Nguyen
  role: author
  orcid: https://orcid.org/0000-0002-6938-6517
  organization: National Institute for Materials Science
- name: Naoyuki Kawamoto
  role: author
  orcid: https://orcid.org/0000-0002-2022-3987
  organization: National Institute for Materials Science
- name: Takao Mori
  role: author
  orcid: https://orcid.org/0000-0003-2682-1846
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: thermoelectric
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Advanced Functional Materials
  issn: '16163028'
  volume: '34'
  issue: '44'
  article_number: '2407017'

## Conference



## Related item



## Funding

- identifier: JPMJMI19A1
  funder_name: JST-Mirai Program

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: 82193c95-8915-4376-911e-ecfd8ee903e3
  filename: Advanced Functional Materials--Outstanding Room-Temperature Thermoelectric
    Performance of n-type Mg3Bi2-based Compounds through Synergistically Combined
    Band Engineering Approaches.pdf
  content_type: application/pdf
  size: 8225720
  md5: 7cae80b0a2cd64565cc0f4ddb20231d0

## Thumbnail

fileset_id: 82193c95-8915-4376-911e-ecfd8ee903e3
filename: Advanced Functional Materials--Outstanding Room-Temperature Thermoelectric
  Performance of n-type Mg3Bi2-based Compounds through Synergistically Combined Band
  Engineering Approaches.pdf