Sb alloying for engineering high-thermoelectric zT of CuGaTe2

Decades of studies on thermoelectric materials have enabled the design of high-performance materials based on basic materials properties, such as bandgap engineering. In general, bandgap energies correspond to the temperature at which the peak thermoelectric performance occurs. For instance, CuGaTe2...

Full description

Saved in:
Bibliographic Details
Main Authors: Zhang, Danwei, Xie, Mingkun, Safanama, Dorsasadat, Saglik, Kivanc, Tan, Xian Yi, Solco, Samantha Faye Duran, Cao, Jing, Tan, Ivan Chee Kiang, Liu, Hongfei, Wang, Suxi, Zhu, Qiang, Fam, Derrick Wen Hui, Yan, Qingyu, Wu, Jing, Suwardi, Ady
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2024
Subjects:
Online Access:https://hdl.handle.net/10356/173820
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-173820
record_format dspace
spelling sg-ntu-dr.10356-1738202024-03-01T15:46:16Z Sb alloying for engineering high-thermoelectric zT of CuGaTe2 Zhang, Danwei Xie, Mingkun Safanama, Dorsasadat Saglik, Kivanc Tan, Xian Yi Solco, Samantha Faye Duran Cao, Jing Tan, Ivan Chee Kiang Liu, Hongfei Wang, Suxi Zhu, Qiang Fam, Derrick Wen Hui Yan, Qingyu Wu, Jing Suwardi, Ady School of Materials Science and Engineering School of Chemistry, Chemical Engineering and Biotechnology Institute of Materials Research and Engineering, A*STAR Engineering Electronic transport Energy harvesting Decades of studies on thermoelectric materials have enabled the design of high-performance materials based on basic materials properties, such as bandgap engineering. In general, bandgap energies correspond to the temperature at which the peak thermoelectric performance occurs. For instance, CuGaTe2 with a relatively wide bandgap of 1.2 eV has its peak zT > 1 at > 900 K. On the other hand, the zT is usually very low (<0.1) for this material at room temperature. This severely limits its average zT and hence overall performance. In this study, a phase diagram-guided Sb alloying strategy to improve the low-temperature zT of CuGaTe2 is used, by leveraging on the solubility limits to control the formation of the microstructural defects. The addition of Sb simultaneously improves the electrical conductivity and decreases the lattice thermal conductivity. For a low-temperature range of 300–623 K, this Sb-alloying strategy enables the achievement of a record high average zT of 0.33. The strategy developed in this study targets the improvement of the low-temperature range of CuGaTe2, which is rarely focused on for wide-bandgap ABX2 compounds, opening up more opportunities for holistic performance improvements, potentially enabling ultrahigh-performance thermoelectrics over a wide temperature range. Agency for Science, Technology and Research (A*STAR) Published version The authors acknowledge support from A*STAR’s Career Development Award C210112022 and A*STAR AME Programmatic Structural Power for Portable and Electrified Transportation, A20H3b0140. 2024-02-29T01:33:32Z 2024-02-29T01:33:32Z 2023 Journal Article Zhang, D., Xie, M., Safanama, D., Saglik, K., Tan, X. Y., Solco, S. F. D., Cao, J., Tan, I. C. K., Liu, H., Wang, S., Zhu, Q., Fam, D. W. H., Yan, Q., Wu, J. & Suwardi, A. (2023). Sb alloying for engineering high-thermoelectric zT of CuGaTe2. Advanced Energy & Sustainability Research, 4(11), 2300069-. https://dx.doi.org/10.1002/aesr.202300069 2699-9412 https://hdl.handle.net/10356/173820 10.1002/aesr.202300069 2-s2.0-85175987560 11 4 2300069 en C210112022 Advanced Energy & Sustainability Research © 2023 The Authors. Advanced Energy and Sustainability Research published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use,distribution and reproduction in any medium, provided the original work is properly cited. 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
Electronic transport
Energy harvesting
spellingShingle Engineering
Electronic transport
Energy harvesting
Zhang, Danwei
Xie, Mingkun
Safanama, Dorsasadat
Saglik, Kivanc
Tan, Xian Yi
Solco, Samantha Faye Duran
Cao, Jing
Tan, Ivan Chee Kiang
Liu, Hongfei
Wang, Suxi
Zhu, Qiang
Fam, Derrick Wen Hui
Yan, Qingyu
Wu, Jing
Suwardi, Ady
Sb alloying for engineering high-thermoelectric zT of CuGaTe2
description Decades of studies on thermoelectric materials have enabled the design of high-performance materials based on basic materials properties, such as bandgap engineering. In general, bandgap energies correspond to the temperature at which the peak thermoelectric performance occurs. For instance, CuGaTe2 with a relatively wide bandgap of 1.2 eV has its peak zT > 1 at > 900 K. On the other hand, the zT is usually very low (<0.1) for this material at room temperature. This severely limits its average zT and hence overall performance. In this study, a phase diagram-guided Sb alloying strategy to improve the low-temperature zT of CuGaTe2 is used, by leveraging on the solubility limits to control the formation of the microstructural defects. The addition of Sb simultaneously improves the electrical conductivity and decreases the lattice thermal conductivity. For a low-temperature range of 300–623 K, this Sb-alloying strategy enables the achievement of a record high average zT of 0.33. The strategy developed in this study targets the improvement of the low-temperature range of CuGaTe2, which is rarely focused on for wide-bandgap ABX2 compounds, opening up more opportunities for holistic performance improvements, potentially enabling ultrahigh-performance thermoelectrics over a wide temperature range.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Zhang, Danwei
Xie, Mingkun
Safanama, Dorsasadat
Saglik, Kivanc
Tan, Xian Yi
Solco, Samantha Faye Duran
Cao, Jing
Tan, Ivan Chee Kiang
Liu, Hongfei
Wang, Suxi
Zhu, Qiang
Fam, Derrick Wen Hui
Yan, Qingyu
Wu, Jing
Suwardi, Ady
format Article
author Zhang, Danwei
Xie, Mingkun
Safanama, Dorsasadat
Saglik, Kivanc
Tan, Xian Yi
Solco, Samantha Faye Duran
Cao, Jing
Tan, Ivan Chee Kiang
Liu, Hongfei
Wang, Suxi
Zhu, Qiang
Fam, Derrick Wen Hui
Yan, Qingyu
Wu, Jing
Suwardi, Ady
author_sort Zhang, Danwei
title Sb alloying for engineering high-thermoelectric zT of CuGaTe2
title_short Sb alloying for engineering high-thermoelectric zT of CuGaTe2
title_full Sb alloying for engineering high-thermoelectric zT of CuGaTe2
title_fullStr Sb alloying for engineering high-thermoelectric zT of CuGaTe2
title_full_unstemmed Sb alloying for engineering high-thermoelectric zT of CuGaTe2
title_sort sb alloying for engineering high-thermoelectric zt of cugate2
publishDate 2024
url https://hdl.handle.net/10356/173820
_version_ 1794549379215917056