Realizing high thermoelectric performance for p-type SiGe in medium temperature region via TaC compositing

Zheng Fan; JiSheng Liang; Jun-Liang Chen; Ying Peng; Huajun Lai; Jian Nong; Chengyan Liu; Wangyang Ding; Lei Miao

Journal of Materiomics (Sep 2023)

Realizing high thermoelectric performance for p-type SiGe in medium temperature region via TaC compositing

Zheng Fan,
JiSheng Liang,
Jun-Liang Chen,
Ying Peng,
Huajun Lai,
Jian Nong,
Chengyan Liu,
Wangyang Ding,
Lei Miao

Affiliations

Zheng Fan: Guangxi Key Laboratory for Relativity Astrophysics, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
JiSheng Liang: Guangxi Key Laboratory for Relativity Astrophysics, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
Jun-Liang Chen: Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guangxi Key Laboratory of Information Material, Guilin University of Electronic Technology, Guilin, 541004, China
Ying Peng: Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guangxi Key Laboratory of Information Material, Guilin University of Electronic Technology, Guilin, 541004, China; Guangxi Key Laboratory of Precision Navigation Technology and Application, Guilin University of Electronic Technology, Guilin, 541004, China; Corresponding author. Guangxi Key Laboratory of Precision Navigation Technology and Application, School of Information and Communication, Guilin University of Electronic Technology, Guilin, 541004, China.
Huajun Lai: Guangxi Academy of Sciences, Nanning, 530007, China
Jian Nong: Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guangxi Key Laboratory of Information Material, Guilin University of Electronic Technology, Guilin, 541004, China
Chengyan Liu: Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guangxi Key Laboratory of Information Material, Guilin University of Electronic Technology, Guilin, 541004, China
Wangyang Ding: Guangxi Key Laboratory for Relativity Astrophysics, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
Lei Miao: Guangxi Key Laboratory for Relativity Astrophysics, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China; Corresponding author. Guangxi Key Laboratory for Relativity Astrophysics, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China.

Journal volume & issue: Vol. 9, no. 5
pp. 984 – 991

Abstract

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SiGe is recognised as an excellent thermoelectric material with superior mechanical properties and thermal stability in regions with high temperatures. This study explores a novel strategy for co-regulating thermoelectric transport parameters to achieve high thermoelectric properties of p-type SiGe in the mid-temperature region by incorporating nano-TaC into SiGe combined ball milling with spark plasma sintering. By optimizing the amount of TaC in the SiGe matrix, the power factors were significantly increased due to the modulation doping effect based on the work function matching of SiGe with TaC. Simultaneously, the ensemble effect of the nanostructure leads to a significant decrease in thermal conductivity. Thus, a high ZT of 1.06 was accomplished at 873 K, which is 64 % higher than that of typical radioisotope thermoelectric generator. Our research offers a novel strategy for expanding and enhancing the thermoelectric properties of SiGe materials in the medium temperature range.

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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