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
N1 - Funding Information:
This work was funded by the National Natural Science Foundation of China (Grants 11674078, 11474329, and 51871081), Shenzhen Fundamental Research Projects (JCYJ20170811155832192 and JCYJ20160427184825558), Startup Foundation from Shenzhen, and Startup Foundation from Harbin Institute of Technology (Shenzhen). The work done at the University of Houston is funded by US Department of Energy Grant DE-SC0010831, US Air Force Office of Scientific Research Grant FA9550-15-1-0236, the T. L. L. Temple Foundation, the John J. and Rebecca Moores Endowment, and the State of Texas through the Texas Center for Superconductivity at the University of Houston.
Publisher Copyright:
© 2019 National Academy of Sciences. All Rights Reserved.
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.
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U2 - 10.1073/pnas.1819157116
DO - 10.1073/pnas.1819157116
M3 - Article
C2 - 30718395
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 -