Low thermal conductivity in GeTe-based thermoelectric materials with additional activated carbon

被引：14

作者：

Youn, Jimin ^{[1
]}

Ryu, Juhee ^{[1
]}

Kim, Hyunji ^{[1
]}

Kihoi, Samuel Kimani ^{[1
]}

Son, In-Sik ^{[1
]}

Chun, Sang-Eun ^{[1
]}

Yi, Seonghoon ^{[1
]}

Lee, Ho Seong ^{[1
]}

机构：

[1] Kyungpook Natl Univ, Sch Mat Sci & Engn, 80 Daehak Ro, Daegu 41566, South Korea

来源：

APPLIED PHYSICS LETTERS | 2021年 / 118卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

615.4 Thermoelectric Energy - 641.1 Thermodynamics - 701.1 Electricity: Basic Concepts and Phenomena - 804 Chemical Products Generally - 933.1 Crystalline Solids - 951 Materials Science;

D O I：

10.1063/5.0039883

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In order to improve the performance of thermoelectric materials, nanoinclusions are often used to enhance phonon scattering. In this study, activated carbon, which is porous and thus has a large surface area, was incorporated in GeTe-based materials to cause increased boundary phonon scattering. Carbon dispersed in grain boundaries resulted in improved thermal properties without significant deterioration in electrical properties. Due to the extrinsic addition of activated carbon, the lattice thermal conductivity decreased by 13.8% on average. A maximum dimensionless figure of merit of 1.66 was achieved at 723K for the Ge0.9Sb0.1Te composition with additional activated carbon.

引用

页数：5

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