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나노 구조 물리 연구단
나노구조물리 연구단
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Electronic and Thermal Transport Properties of Complex Structured Cu-Bi-Se Thermoelectric Compound with Low Lattice Thermal Conductivity

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Title
Electronic and Thermal Transport Properties of Complex Structured Cu-Bi-Se Thermoelectric Compound with Low Lattice Thermal Conductivity
Author(s)
Jae-Yeol Hwang; Mun, H; Cho, JY; Yang, SS; Lee, KH; Sung Wng Kim
Publication Date
2013
Journal
JOURNAL OF NANOMATERIALS, v.2013, no., pp.502150 -
Publisher
HINDAWI PUBLISHING CORPORATION
Abstract
Monoclinic Cux+yBi5-ySe8 structure has multiple disorders, such as randomly distributed substitutional and interstitial disorders by Cu as well as asymmetrical disorders by Se. Herein, we report the correlation of electronic and thermal properties with the structural complexities of Cux+yBi5-ySe8. It is found that the interstitial Cu site plays an important role not only to increase the electrical conductivity due to the generation of electron carriers but also to reduce the thermal conductivity mainly due to the phonon scattering by mass fluctuation. With impurity doping at the interstitial Cu site, an extremely low lattice thermal conductivity of 0.32 W·m-1·K -1 was achieved at 560 K. These synergetic effects result in the enhanced dimensionless figure of merit (ZT). © 2013 Jae-Yeol Hwang et al.
URI
http://pr.ibs.re.kr/handle/8788114/1405
DOI
10.1155/2013/502150
ISSN
1687-4110
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
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