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Multiple Valence Bands Convergence and Localized Lattice Engineering Lead to Superhigh Thermoelectric Figure of Merit in MnTe

MnTe has been considered a promising candidate for lead‐free mid‐temperature range thermoelectric clean energy conversions. However, the widespread use of this technology is constrained by the relatively low‐cost performance of materials. Developing environmentally friendly thermoelectrics with high...

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Autores principales: Zulkifal, Shahzada, Wang, Zhichao, Zhang, Xuemei, Siddique, Suniya, Yu, Yuan, Wang, Chong, Gong, Yaru, Li, Shuang, Li, Di, Zhang, Yongsheng, Wang, Peng, Tang, Guodong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10265067/
https://www.ncbi.nlm.nih.gov/pubmed/37092577
http://dx.doi.org/10.1002/advs.202206342
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author Zulkifal, Shahzada
Wang, Zhichao
Zhang, Xuemei
Siddique, Suniya
Yu, Yuan
Wang, Chong
Gong, Yaru
Li, Shuang
Li, Di
Zhang, Yongsheng
Wang, Peng
Tang, Guodong
author_facet Zulkifal, Shahzada
Wang, Zhichao
Zhang, Xuemei
Siddique, Suniya
Yu, Yuan
Wang, Chong
Gong, Yaru
Li, Shuang
Li, Di
Zhang, Yongsheng
Wang, Peng
Tang, Guodong
author_sort Zulkifal, Shahzada
collection PubMed
description MnTe has been considered a promising candidate for lead‐free mid‐temperature range thermoelectric clean energy conversions. However, the widespread use of this technology is constrained by the relatively low‐cost performance of materials. Developing environmentally friendly thermoelectrics with high performance and earth‐abundant elements is thus an urgent task. MnTe is a candidate, yet a peak ZT of 1.4 achieved so far is less satisfactory. Here, a remarkably high ZT of 1.6 at 873 K in MnTe system is realized by facilitating multiple valence band convergence and localized lattice engineering. It is demonstrated that Sb—Ge incorporation promotes the convergence of multiple electronic valence bands in MnTe. Simultaneously, the carrier concentration can be optimized by Sb—Ge—S alloying, which significantly enhances the power factor. Simultaneously, MnS nanorods combined with dislocations and lattice distortions lead to strong phonon scattering, resulting in a markedly low lattice thermal conductivity(κ (lat)) of 0.54 W m K(−1), quite close to the amorphous limit. As a consequence, extraordinary thermoelectric performance is achieved by decoupling electron and phonon transport. The vast increase in ZT promotes MnTe as an emerging Pb‐free thermoelectric compound for a wide range of applications in waste heat recovery and power generation.
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spelling pubmed-102650672023-06-15 Multiple Valence Bands Convergence and Localized Lattice Engineering Lead to Superhigh Thermoelectric Figure of Merit in MnTe Zulkifal, Shahzada Wang, Zhichao Zhang, Xuemei Siddique, Suniya Yu, Yuan Wang, Chong Gong, Yaru Li, Shuang Li, Di Zhang, Yongsheng Wang, Peng Tang, Guodong Adv Sci (Weinh) Research Articles MnTe has been considered a promising candidate for lead‐free mid‐temperature range thermoelectric clean energy conversions. However, the widespread use of this technology is constrained by the relatively low‐cost performance of materials. Developing environmentally friendly thermoelectrics with high performance and earth‐abundant elements is thus an urgent task. MnTe is a candidate, yet a peak ZT of 1.4 achieved so far is less satisfactory. Here, a remarkably high ZT of 1.6 at 873 K in MnTe system is realized by facilitating multiple valence band convergence and localized lattice engineering. It is demonstrated that Sb—Ge incorporation promotes the convergence of multiple electronic valence bands in MnTe. Simultaneously, the carrier concentration can be optimized by Sb—Ge—S alloying, which significantly enhances the power factor. Simultaneously, MnS nanorods combined with dislocations and lattice distortions lead to strong phonon scattering, resulting in a markedly low lattice thermal conductivity(κ (lat)) of 0.54 W m K(−1), quite close to the amorphous limit. As a consequence, extraordinary thermoelectric performance is achieved by decoupling electron and phonon transport. The vast increase in ZT promotes MnTe as an emerging Pb‐free thermoelectric compound for a wide range of applications in waste heat recovery and power generation. John Wiley and Sons Inc. 2023-04-24 /pmc/articles/PMC10265067/ /pubmed/37092577 http://dx.doi.org/10.1002/advs.202206342 Text en © 2023 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Zulkifal, Shahzada
Wang, Zhichao
Zhang, Xuemei
Siddique, Suniya
Yu, Yuan
Wang, Chong
Gong, Yaru
Li, Shuang
Li, Di
Zhang, Yongsheng
Wang, Peng
Tang, Guodong
Multiple Valence Bands Convergence and Localized Lattice Engineering Lead to Superhigh Thermoelectric Figure of Merit in MnTe
title Multiple Valence Bands Convergence and Localized Lattice Engineering Lead to Superhigh Thermoelectric Figure of Merit in MnTe
title_full Multiple Valence Bands Convergence and Localized Lattice Engineering Lead to Superhigh Thermoelectric Figure of Merit in MnTe
title_fullStr Multiple Valence Bands Convergence and Localized Lattice Engineering Lead to Superhigh Thermoelectric Figure of Merit in MnTe
title_full_unstemmed Multiple Valence Bands Convergence and Localized Lattice Engineering Lead to Superhigh Thermoelectric Figure of Merit in MnTe
title_short Multiple Valence Bands Convergence and Localized Lattice Engineering Lead to Superhigh Thermoelectric Figure of Merit in MnTe
title_sort multiple valence bands convergence and localized lattice engineering lead to superhigh thermoelectric figure of merit in mnte
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10265067/
https://www.ncbi.nlm.nih.gov/pubmed/37092577
http://dx.doi.org/10.1002/advs.202206342
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