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Rb(Zn,Cu)(4)As(3) as a New High-Efficiency Thermoelectric Material

[Image: see text] The thermoelectric performance of RbZn(4–x)Cu(x)As(3) crystallized in the KCu(4)S(3)-type structure was investigated. Samples were synthesized via solid-state reactions, followed by hot pressing. Hole carriers were doped by substituting Zn with Cu until x = 0.02, resulting in an in...

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Autores principales: Ono, Keigo, Kihou, Kunihiro, Usui, Hidetomo, Kuroki, Kazuhiko, Goto, Yosuke, Lee, Chul-Ho
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10652267/
https://www.ncbi.nlm.nih.gov/pubmed/38024771
http://dx.doi.org/10.1021/acsomega.3c06021
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author Ono, Keigo
Kihou, Kunihiro
Usui, Hidetomo
Kuroki, Kazuhiko
Goto, Yosuke
Lee, Chul-Ho
author_facet Ono, Keigo
Kihou, Kunihiro
Usui, Hidetomo
Kuroki, Kazuhiko
Goto, Yosuke
Lee, Chul-Ho
author_sort Ono, Keigo
collection PubMed
description [Image: see text] The thermoelectric performance of RbZn(4–x)Cu(x)As(3) crystallized in the KCu(4)S(3)-type structure was investigated. Samples were synthesized via solid-state reactions, followed by hot pressing. Hole carriers were doped by substituting Zn with Cu until x = 0.02, resulting in an increase of the power factor from 0.049 to 0.52 mW/mK(2) at T = 797 K. The lattice thermal conductivity was substantially low, with a value of 1.61 W/mK at T = 312 K, independent of doping. This can be attributed to the large vibration of the Rb atoms, as demonstrated by the neutron diffraction analysis. The maximum dimensionless figure of merit, ZT, was 0.53 at T = 797 K, representing the highest value for the 143-Zintl compounds. The result indicated that the 143-Zintl compounds could be a new class of high-performance thermoelectric materials.
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spelling pubmed-106522672023-10-30 Rb(Zn,Cu)(4)As(3) as a New High-Efficiency Thermoelectric Material Ono, Keigo Kihou, Kunihiro Usui, Hidetomo Kuroki, Kazuhiko Goto, Yosuke Lee, Chul-Ho ACS Omega [Image: see text] The thermoelectric performance of RbZn(4–x)Cu(x)As(3) crystallized in the KCu(4)S(3)-type structure was investigated. Samples were synthesized via solid-state reactions, followed by hot pressing. Hole carriers were doped by substituting Zn with Cu until x = 0.02, resulting in an increase of the power factor from 0.049 to 0.52 mW/mK(2) at T = 797 K. The lattice thermal conductivity was substantially low, with a value of 1.61 W/mK at T = 312 K, independent of doping. This can be attributed to the large vibration of the Rb atoms, as demonstrated by the neutron diffraction analysis. The maximum dimensionless figure of merit, ZT, was 0.53 at T = 797 K, representing the highest value for the 143-Zintl compounds. The result indicated that the 143-Zintl compounds could be a new class of high-performance thermoelectric materials. American Chemical Society 2023-10-30 /pmc/articles/PMC10652267/ /pubmed/38024771 http://dx.doi.org/10.1021/acsomega.3c06021 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Ono, Keigo
Kihou, Kunihiro
Usui, Hidetomo
Kuroki, Kazuhiko
Goto, Yosuke
Lee, Chul-Ho
Rb(Zn,Cu)(4)As(3) as a New High-Efficiency Thermoelectric Material
title Rb(Zn,Cu)(4)As(3) as a New High-Efficiency Thermoelectric Material
title_full Rb(Zn,Cu)(4)As(3) as a New High-Efficiency Thermoelectric Material
title_fullStr Rb(Zn,Cu)(4)As(3) as a New High-Efficiency Thermoelectric Material
title_full_unstemmed Rb(Zn,Cu)(4)As(3) as a New High-Efficiency Thermoelectric Material
title_short Rb(Zn,Cu)(4)As(3) as a New High-Efficiency Thermoelectric Material
title_sort rb(zn,cu)(4)as(3) as a new high-efficiency thermoelectric material
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10652267/
https://www.ncbi.nlm.nih.gov/pubmed/38024771
http://dx.doi.org/10.1021/acsomega.3c06021
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