Improved Thermoelectric Performance in n-type Bi2(Te,Se)3 Alloys through the Incorporation of Fe Nanoparticles

Kyungmi Lee; Gwansik Kim; Sung Wook Ye; Jeongmin Kim; Jong Wook Roh; Wooyoung Lee

doi:10.1021/acsaem.4c01778

Improved Thermoelectric Performance in n-type Bi₂(Te,Se)₃ Alloys through the Incorporation of Fe Nanoparticles

Kyungmi Lee
, Gwansik Kim
, Sung Wook Ye
, Jeongmin Kim
, Jong Wook Roh
, Wooyoung Lee

Yonsei University
Hyundai Motor Group
Kyungpook National University
Daegu Gyeongbuk Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Herein, we investigated the thermoelectric properties of Fe-BTS (Bi₂Te₃-based compound) samples fabricated through nanometal decoration and spark plasma sintering. We examined the effects of Fe nanoparticle (NP) addition on the power factor (PF), thermal conductivity (κ), and figure of merit (ZT) of the samples. The incorporation of Fe NPs led to a significant increase in the PF of the Fe-BTS samples, surpassing the performance of the pristine sample by over 34%. This improvement is attributed to the combined effects of carrier concentration tuning and low-energy carrier filtering. Additionally, the thermal conductivity of the Fe-BTS samples was significantly reduced due to enhanced phonon scattering at the increased interfaces. Consequently, a maximum ZT value of 1.09 was achieved at 363 K for the Fe-BTS sample with an Fe content of 0.3 vol %. These findings highlight the crucial role of interface engineering in enhancing the thermoelectric properties of materials.

Original language	English
Pages (from-to)	9300-9306
Number of pages	7
Journal	ACS Applied Energy Materials
Volume	7
Issue number	20
DOIs	https://doi.org/10.1021/acsaem.4c01778
State	Published - 28 Oct 2024

Keywords

Bi(Te,Se)
electrical properties
nanostructured materials
sintering
thermoelectric
thermoelectric materials

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10.1021/acsaem.4c01778

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title = "Improved Thermoelectric Performance in n-type Bi2(Te,Se)3 Alloys through the Incorporation of Fe Nanoparticles",

abstract = "Herein, we investigated the thermoelectric properties of Fe-BTS (Bi2Te3-based compound) samples fabricated through nanometal decoration and spark plasma sintering. We examined the effects of Fe nanoparticle (NP) addition on the power factor (PF), thermal conductivity (κ), and figure of merit (ZT) of the samples. The incorporation of Fe NPs led to a significant increase in the PF of the Fe-BTS samples, surpassing the performance of the pristine sample by over 34\%. This improvement is attributed to the combined effects of carrier concentration tuning and low-energy carrier filtering. Additionally, the thermal conductivity of the Fe-BTS samples was significantly reduced due to enhanced phonon scattering at the increased interfaces. Consequently, a maximum ZT value of 1.09 was achieved at 363 K for the Fe-BTS sample with an Fe content of 0.3 vol \%. These findings highlight the crucial role of interface engineering in enhancing the thermoelectric properties of materials.",

keywords = "Bi(Te,Se), electrical properties, nanostructured materials, sintering, thermoelectric, thermoelectric materials",

author = "Kyungmi Lee and Gwansik Kim and Ye, \{Sung Wook\} and Jeongmin Kim and Roh, \{Jong Wook\} and Wooyoung Lee",

note = "Publisher Copyright: {\textcopyright} 2024 American Chemical Society.",

year = "2024",

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doi = "10.1021/acsaem.4c01778",

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T1 - Improved Thermoelectric Performance in n-type Bi2(Te,Se)3 Alloys through the Incorporation of Fe Nanoparticles

AU - Lee, Kyungmi

AU - Kim, Gwansik

AU - Ye, Sung Wook

AU - Kim, Jeongmin

AU - Roh, Jong Wook

AU - Lee, Wooyoung

PY - 2024/10/28

Y1 - 2024/10/28

N2 - Herein, we investigated the thermoelectric properties of Fe-BTS (Bi2Te3-based compound) samples fabricated through nanometal decoration and spark plasma sintering. We examined the effects of Fe nanoparticle (NP) addition on the power factor (PF), thermal conductivity (κ), and figure of merit (ZT) of the samples. The incorporation of Fe NPs led to a significant increase in the PF of the Fe-BTS samples, surpassing the performance of the pristine sample by over 34%. This improvement is attributed to the combined effects of carrier concentration tuning and low-energy carrier filtering. Additionally, the thermal conductivity of the Fe-BTS samples was significantly reduced due to enhanced phonon scattering at the increased interfaces. Consequently, a maximum ZT value of 1.09 was achieved at 363 K for the Fe-BTS sample with an Fe content of 0.3 vol %. These findings highlight the crucial role of interface engineering in enhancing the thermoelectric properties of materials.

AB - Herein, we investigated the thermoelectric properties of Fe-BTS (Bi2Te3-based compound) samples fabricated through nanometal decoration and spark plasma sintering. We examined the effects of Fe nanoparticle (NP) addition on the power factor (PF), thermal conductivity (κ), and figure of merit (ZT) of the samples. The incorporation of Fe NPs led to a significant increase in the PF of the Fe-BTS samples, surpassing the performance of the pristine sample by over 34%. This improvement is attributed to the combined effects of carrier concentration tuning and low-energy carrier filtering. Additionally, the thermal conductivity of the Fe-BTS samples was significantly reduced due to enhanced phonon scattering at the increased interfaces. Consequently, a maximum ZT value of 1.09 was achieved at 363 K for the Fe-BTS sample with an Fe content of 0.3 vol %. These findings highlight the crucial role of interface engineering in enhancing the thermoelectric properties of materials.

KW - Bi(Te,Se)

KW - electrical properties

KW - nanostructured materials

KW - sintering

KW - thermoelectric

KW - thermoelectric materials

UR - https://www.scopus.com/pages/publications/85206630590

U2 - 10.1021/acsaem.4c01778

DO - 10.1021/acsaem.4c01778

M3 - Article

AN - SCOPUS:85206630590

SN - 2574-0962

VL - 7

SP - 9300

EP - 9306

JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

IS - 20

ER -

Improved Thermoelectric Performance in n-type Bi₂(Te,Se)₃ Alloys through the Incorporation of Fe Nanoparticles

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Keywords

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