High thermoelectric performance in GeTe with compositional insensitivity

Thermoelectric materials have obtained worldwide attention as they are attractive for waste heat recovery and solid-state cooling. However, their performance is usually sensitive to material compositions, which is less favorable for industrial applications. In this work, we developed composition-ins...

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Main Authors: Dong, Jinfeng, Jiang, Yilin, Liu, Jiawei, Pei, Jun, Tan, Xian Yi, Hu, Haihua, Suwardi, Ady, Jia, Ning, Liu, Chuntai, Zhu, Qiang, Yan, Qingyu, Li, Jingfeng
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/163214
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1632142023-07-14T16:06:25Z High thermoelectric performance in GeTe with compositional insensitivity Dong, Jinfeng Jiang, Yilin Liu, Jiawei Pei, Jun Tan, Xian Yi Hu, Haihua Suwardi, Ady Jia, Ning Liu, Chuntai Zhu, Qiang Yan, Qingyu Li, Jingfeng School of Materials Science and Engineering Institute of Materials Research and Engineering, A*STAR Engineering::Materials::Energy materials Thermoelectric Germanium Telluride Thermoelectric materials have obtained worldwide attention as they are attractive for waste heat recovery and solid-state cooling. However, their performance is usually sensitive to material compositions, which is less favorable for industrial applications. In this work, we developed composition-insensitive GeTe-based compounds ((100-x-y)%GeTe-x%CuBiSe2-y%PbTe, CBSx-Pby) with high ZTmax as well as ZTave values. The compositional insensitivity can be associated with the persistently high quality factors across the range of compositions. This is largely due to the interplay between electrical and thermal transport caused by the synergy of CuBiSe2 and PbTe alloying. CuBiSe2 alloying can effectively tune the carrier concentrations, while PbTe alloying can significantly decrease the thermal conductivity at a minor sacrifice of electrical properties. The combined effects of CuBiSe2 and PbTe alloying lead to high carrier mobility of 60 cm2V−1s−1 and low thermal conductivities for CBSx-Pby samples simultaneously. Consequently, high ZTave values of 1.4–1.5 in the temperature range of 400 K and 773 K for broad compositions (CBS3-Pby, y = 2 – 8 and CBSx-Pb6, x = 2 – 5) are achieved. A single-leg module is also fabricated, which shows a high power density of 1.46 W/cm2 and an excellent efficiency of 13.4%. The high ZTave with compositional insensitivity and the outstanding module performance demonstrate the promising large-scale application of the developed GeTe-based compositions. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) Submitted/Accepted version This study was supported by the Basic Science Center Project of NSFC under Grant No. 51788104, the National Key R&D Program of China No. 2018YFB0703603, the MOE Tier 1 RG128/21 and Singapore A*STAR project A19D9a0096. A. Suwardi acknowledges funding from Agency for Science, Technology and Research (A*STAR), Singapore Career Development Fund (CDF) C210112022. 2022-11-29T02:07:25Z 2022-11-29T02:07:25Z 2022 Journal Article Dong, J., Jiang, Y., Liu, J., Pei, J., Tan, X. Y., Hu, H., Suwardi, A., Jia, N., Liu, C., Zhu, Q., Yan, Q. & Li, J. (2022). High thermoelectric performance in GeTe with compositional insensitivity. Nano Energy, 103(Part A), 107809-. https://dx.doi.org/10.1016/j.nanoen.2022.107809 2211-2855 https://hdl.handle.net/10356/163214 10.1016/j.nanoen.2022.107809 2-s2.0-85138133365 Part A 103 107809 en RG128/21 A19D9a0096 (CDF) C210112022 Nano Energy © 2022 Elsevier Ltd. All rights reserved. This paper was published in Nano Energy and is made available with permission of Elsevier Ltd. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials::Energy materials
Thermoelectric
Germanium Telluride
spellingShingle Engineering::Materials::Energy materials
Thermoelectric
Germanium Telluride
Dong, Jinfeng
Jiang, Yilin
Liu, Jiawei
Pei, Jun
Tan, Xian Yi
Hu, Haihua
Suwardi, Ady
Jia, Ning
Liu, Chuntai
Zhu, Qiang
Yan, Qingyu
Li, Jingfeng
High thermoelectric performance in GeTe with compositional insensitivity
description Thermoelectric materials have obtained worldwide attention as they are attractive for waste heat recovery and solid-state cooling. However, their performance is usually sensitive to material compositions, which is less favorable for industrial applications. In this work, we developed composition-insensitive GeTe-based compounds ((100-x-y)%GeTe-x%CuBiSe2-y%PbTe, CBSx-Pby) with high ZTmax as well as ZTave values. The compositional insensitivity can be associated with the persistently high quality factors across the range of compositions. This is largely due to the interplay between electrical and thermal transport caused by the synergy of CuBiSe2 and PbTe alloying. CuBiSe2 alloying can effectively tune the carrier concentrations, while PbTe alloying can significantly decrease the thermal conductivity at a minor sacrifice of electrical properties. The combined effects of CuBiSe2 and PbTe alloying lead to high carrier mobility of 60 cm2V−1s−1 and low thermal conductivities for CBSx-Pby samples simultaneously. Consequently, high ZTave values of 1.4–1.5 in the temperature range of 400 K and 773 K for broad compositions (CBS3-Pby, y = 2 – 8 and CBSx-Pb6, x = 2 – 5) are achieved. A single-leg module is also fabricated, which shows a high power density of 1.46 W/cm2 and an excellent efficiency of 13.4%. The high ZTave with compositional insensitivity and the outstanding module performance demonstrate the promising large-scale application of the developed GeTe-based compositions.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Dong, Jinfeng
Jiang, Yilin
Liu, Jiawei
Pei, Jun
Tan, Xian Yi
Hu, Haihua
Suwardi, Ady
Jia, Ning
Liu, Chuntai
Zhu, Qiang
Yan, Qingyu
Li, Jingfeng
format Article
author Dong, Jinfeng
Jiang, Yilin
Liu, Jiawei
Pei, Jun
Tan, Xian Yi
Hu, Haihua
Suwardi, Ady
Jia, Ning
Liu, Chuntai
Zhu, Qiang
Yan, Qingyu
Li, Jingfeng
author_sort Dong, Jinfeng
title High thermoelectric performance in GeTe with compositional insensitivity
title_short High thermoelectric performance in GeTe with compositional insensitivity
title_full High thermoelectric performance in GeTe with compositional insensitivity
title_fullStr High thermoelectric performance in GeTe with compositional insensitivity
title_full_unstemmed High thermoelectric performance in GeTe with compositional insensitivity
title_sort high thermoelectric performance in gete with compositional insensitivity
publishDate 2022
url https://hdl.handle.net/10356/163214
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