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

研究成果: Article同行評審

23 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)2831-2836
頁數6
期刊Proceedings of the National Academy of Sciences of the United States of America
116
發行號8
DOIs
出版狀態Published - 2019 二月 19

All Science Journal Classification (ASJC) codes

  • General

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