Zintl-phase Eu                         2                         ZnSb                         2: A promising thermoelectric material with ultralow thermal conductivity

Chen Chen; Wenhua Xue; Shan Li; Zongwei Zhang; Xiaofang Li; Xinyu Wang; Yijie Liu; Jiehe Sui; Xingjun Liu; Feng Cao; Zhifeng Ren; Ching Wu Chu; Yumei Wang; Qian Zhang

doi:10.1073/pnas.1819157116

Zintl-phase Eu ₂ ZnSb ₂: A promising thermoelectric material with ultralow thermal conductivity

Chen Chen, Wenhua Xue, Shan Li, Zongwei Zhang, Xiaofang Li, Xinyu Wang, Yijie Liu, Jiehe Sui, Xingjun Liu, Feng Cao, Zhifeng Ren, Ching Wu Chu, Yumei Wang, Qian Zhang

Research output: Contribution to journal › Article › peer-review

122 Scopus citations

Abstract

Zintl compounds are considered to be potential thermoelectric materials due to their “phonon glass electron crystal” (PGEC) structure. A promising Zintl-phase thermoelectric material, 2-1-2–type Eu ₂ ZnSb ₂ (P6 ₃ /mmc), was prepared and investigated. The extremely low lattice thermal conductivity is attributed to the external Eu atomic layers inserted in the [Zn ₂ Sb ₂ ] ^2- network in the structure of 1-2-2–type EuZn ₂ Sb ₂ (P3m1), as well as the abundant inversion domain boundary. By regulating the Zn deficiency, the electrical properties are significantly enhanced, and the maximum ZT value reaches ∼1.0 at 823 K for Eu ₂ Zn _0.98 Sb ₂ . Our discovery provides a class of Zintl thermoelectric materials applicable in the medium-temperature range.

Original language	English
Pages (from-to)	2831-2836
Number of pages	6
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	116
Issue number	8
DOIs	https://doi.org/10.1073/pnas.1819157116
State	Published - 19 Feb 2019
Externally published	Yes

Keywords

Eu ZnSb
Low thermal conductivity
Thermoelectric properties
Zintl phase

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10.1073/pnas.1819157116

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Chen, C., Xue, W., Li, S., Zhang, Z., Li, X., Wang, X., Liu, Y., Sui, J., Liu, X., Cao, F., Ren, Z., Chu, C. W., Wang, Y., & Zhang, Q. (2019). Zintl-phase Eu ₂ ZnSb ₂: A promising thermoelectric material with ultralow thermal conductivity. Proceedings of the National Academy of Sciences of the United States of America, 116(8), 2831-2836. https://doi.org/10.1073/pnas.1819157116

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title = "Zintl-phase Eu 2 ZnSb 2: A promising thermoelectric material with ultralow thermal conductivity",

abstract = " Zintl compounds are considered to be potential thermoelectric materials due to their “phonon glass electron crystal” (PGEC) structure. A promising Zintl-phase thermoelectric material, 2-1-2–type Eu 2 ZnSb 2 (P6 3 /mmc), was prepared and investigated. The extremely low lattice thermal conductivity is attributed to the external Eu atomic layers inserted in the [Zn 2 Sb 2 ] 2- network in the structure of 1-2-2–type EuZn 2 Sb 2 (P3m1), as well as the abundant inversion domain boundary. By regulating the Zn deficiency, the electrical properties are significantly enhanced, and the maximum ZT value reaches ∼1.0 at 823 K for Eu 2 Zn 0.98 Sb 2 . Our discovery provides a class of Zintl thermoelectric materials applicable in the medium-temperature range.",

keywords = "Eu ZnSb, Low thermal conductivity, Thermoelectric properties, Zintl phase",

author = "Chen Chen and Wenhua Xue and Shan Li and Zongwei Zhang and Xiaofang Li and Xinyu Wang and Yijie Liu and Jiehe Sui and Xingjun Liu and Feng Cao and Zhifeng Ren and Chu, {Ching Wu} and Yumei Wang and Qian Zhang",

year = "2019",

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doi = "10.1073/pnas.1819157116",

language = "英语",

volume = "116",

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Chen, C, Xue, W, Li, S, Zhang, Z, Li, X, Wang, X, Liu, Y, Sui, J, Liu, X, Cao, F, Ren, Z, Chu, CW, Wang, Y & Zhang, Q 2019, 'Zintl-phase Eu ₂ ZnSb ₂: A promising thermoelectric material with ultralow thermal conductivity', Proceedings of the National Academy of Sciences of the United States of America, vol. 116, no. 8, pp. 2831-2836. https://doi.org/10.1073/pnas.1819157116

Zintl-phase Eu ₂ ZnSb ₂: A promising thermoelectric material with ultralow thermal conductivity. / Chen, Chen; Xue, Wenhua; Li, Shan et al.
In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 116, No. 8, 19.02.2019, p. 2831-2836.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Zintl-phase Eu 2 ZnSb 2

T2 - A promising thermoelectric material with ultralow thermal conductivity

AU - Chen, Chen

AU - Xue, Wenhua

AU - Li, Shan

AU - Zhang, Zongwei

AU - Li, Xiaofang

AU - Wang, Xinyu

AU - Liu, Yijie

AU - Sui, Jiehe

AU - Liu, Xingjun

AU - Cao, Feng

AU - Ren, Zhifeng

AU - Chu, Ching Wu

AU - Wang, Yumei

AU - Zhang, Qian

PY - 2019/2/19

Y1 - 2019/2/19

N2 - Zintl compounds are considered to be potential thermoelectric materials due to their “phonon glass electron crystal” (PGEC) structure. A promising Zintl-phase thermoelectric material, 2-1-2–type Eu 2 ZnSb 2 (P6 3 /mmc), was prepared and investigated. The extremely low lattice thermal conductivity is attributed to the external Eu atomic layers inserted in the [Zn 2 Sb 2 ] 2- network in the structure of 1-2-2–type EuZn 2 Sb 2 (P3m1), as well as the abundant inversion domain boundary. By regulating the Zn deficiency, the electrical properties are significantly enhanced, and the maximum ZT value reaches ∼1.0 at 823 K for Eu 2 Zn 0.98 Sb 2 . Our discovery provides a class of Zintl thermoelectric materials applicable in the medium-temperature range.

AB - Zintl compounds are considered to be potential thermoelectric materials due to their “phonon glass electron crystal” (PGEC) structure. A promising Zintl-phase thermoelectric material, 2-1-2–type Eu 2 ZnSb 2 (P6 3 /mmc), was prepared and investigated. The extremely low lattice thermal conductivity is attributed to the external Eu atomic layers inserted in the [Zn 2 Sb 2 ] 2- network in the structure of 1-2-2–type EuZn 2 Sb 2 (P3m1), as well as the abundant inversion domain boundary. By regulating the Zn deficiency, the electrical properties are significantly enhanced, and the maximum ZT value reaches ∼1.0 at 823 K for Eu 2 Zn 0.98 Sb 2 . Our discovery provides a class of Zintl thermoelectric materials applicable in the medium-temperature range.

KW - Eu ZnSb

KW - Low thermal conductivity

KW - Thermoelectric properties

KW - Zintl phase

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U2 - 10.1073/pnas.1819157116

DO - 10.1073/pnas.1819157116

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AN - SCOPUS:85061861842

SN - 0027-8424

VL - 116

SP - 2831

EP - 2836

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

IS - 8

ER -

Zintl-phase Eu ₂ ZnSb ₂: A promising thermoelectric material with ultralow thermal conductivity

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Keywords

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