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).
| Original language | English |
|---|---|
| Article number | 502150 |
| Journal | Journal of Nanomaterials |
| Volume | 2013 |
| DOIs | |
| Publication status | Published - 2013 Oct 7 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
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Electronic and thermal transport properties of complex structured cu-bi-se thermoelectric compound with low lattice thermal conductivity. / Hwang, Jae Yeol; Mun, Hyeona; Cho, Jung Young; Yang, Sang Sun; Lee, Kyu Hyoung; Kim, Sung Wng.
In: Journal of Nanomaterials, Vol. 2013, 502150, 07.10.2013.Research output: Contribution to journal › Article
TY - JOUR
T1 - Electronic and thermal transport properties of complex structured cu-bi-se thermoelectric compound with low lattice thermal conductivity
AU - Hwang, Jae Yeol
AU - Mun, Hyeona
AU - Cho, Jung Young
AU - Yang, Sang Sun
AU - Lee, Kyu Hyoung
AU - Kim, Sung Wng
PY - 2013/10/7
Y1 - 2013/10/7
N2 - 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).
AB - 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).
UR - http://www.scopus.com/inward/record.url?scp=84884871373&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84884871373&partnerID=8YFLogxK
U2 - 10.1155/2013/502150
DO - 10.1155/2013/502150
M3 - Article
AN - SCOPUS:84884871373
VL - 2013
JO - Journal of Nanomaterials
JF - Journal of Nanomaterials
SN - 1687-4110
M1 - 502150
ER -