Design and evaluation of n-type Si1-xGex as a thermoelectric-conversion material

Tomohiro Imai; Tsutomu Iida; Yuki Miyata; Takashi Itoh; Hiroki Funashima; Yoshifumi Takanashi; Noriaki Hamada

Design and evaluation of n-type Si_1-xGe_x as a thermoelectric-conversion material

Tomohiro Imai, Tsutomu Iida, Yuki Miyata, Takashi Itoh, Hiroki Funashima, Yoshifumi Takanashi, Noriaki Hamada

Department of Materials Science and Technology

Research output: Contribution to journal › Conference article › peer-review

Abstract

Si_1-xGe_x alloys show the high power generating efficiency as a thermoelectric-conversion material. We evaluate the thermoelectric power of the n-type SiGe system on the basis of the first principles calculations. The electronic-band-structure calculation is performed using all-electron full-potential linearized augmented-plane-wave (FLAPW) method within the local density approximation (LDA). The Seebeck coefficient is analyzed by the Bloch-Boltzmann equation. We find that the ordered rhombohedral SiGe has high Seebeck coefficient in comparison with zincblende SiGe. The efficiency of the thermoelectric power in Si_1-xGe_x is gained by the local atomic configuration rather than the Ge concentration.

Original language	English
Pages (from-to)	211-216
Number of pages	6
Journal	Materials Research Society Symposium Proceedings
Volume	1044
Publication status	Published - 2008
Event	Thermoelectric Power Generation - Boston, MA, United States Duration: 26 Nov 2007 → 29 Nov 2007

Cite this

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title = "Design and evaluation of n-type Si1-xGex as a thermoelectric-conversion material",

abstract = "Si1-xGex alloys show the high power generating efficiency as a thermoelectric-conversion material. We evaluate the thermoelectric power of the n-type SiGe system on the basis of the first principles calculations. The electronic-band-structure calculation is performed using all-electron full-potential linearized augmented-plane-wave (FLAPW) method within the local density approximation (LDA). The Seebeck coefficient is analyzed by the Bloch-Boltzmann equation. We find that the ordered rhombohedral SiGe has high Seebeck coefficient in comparison with zincblende SiGe. The efficiency of the thermoelectric power in Si1-xGex is gained by the local atomic configuration rather than the Ge concentration.",

author = "Tomohiro Imai and Tsutomu Iida and Yuki Miyata and Takashi Itoh and Hiroki Funashima and Yoshifumi Takanashi and Noriaki Hamada",

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language = "English",

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TY - JOUR

T1 - Design and evaluation of n-type Si1-xGex as a thermoelectric-conversion material

AU - Imai, Tomohiro

AU - Iida, Tsutomu

AU - Miyata, Yuki

AU - Itoh, Takashi

AU - Funashima, Hiroki

AU - Takanashi, Yoshifumi

AU - Hamada, Noriaki

PY - 2008

Y1 - 2008

N2 - Si1-xGex alloys show the high power generating efficiency as a thermoelectric-conversion material. We evaluate the thermoelectric power of the n-type SiGe system on the basis of the first principles calculations. The electronic-band-structure calculation is performed using all-electron full-potential linearized augmented-plane-wave (FLAPW) method within the local density approximation (LDA). The Seebeck coefficient is analyzed by the Bloch-Boltzmann equation. We find that the ordered rhombohedral SiGe has high Seebeck coefficient in comparison with zincblende SiGe. The efficiency of the thermoelectric power in Si1-xGex is gained by the local atomic configuration rather than the Ge concentration.

AB - Si1-xGex alloys show the high power generating efficiency as a thermoelectric-conversion material. We evaluate the thermoelectric power of the n-type SiGe system on the basis of the first principles calculations. The electronic-band-structure calculation is performed using all-electron full-potential linearized augmented-plane-wave (FLAPW) method within the local density approximation (LDA). The Seebeck coefficient is analyzed by the Bloch-Boltzmann equation. We find that the ordered rhombohedral SiGe has high Seebeck coefficient in comparison with zincblende SiGe. The efficiency of the thermoelectric power in Si1-xGex is gained by the local atomic configuration rather than the Ge concentration.

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M3 - Conference article

AN - SCOPUS:54749125872

SN - 0272-9172

VL - 1044

SP - 211

EP - 216

JO - Materials Research Society Symposium Proceedings

JF - Materials Research Society Symposium Proceedings

T2 - Thermoelectric Power Generation

Y2 - 26 November 2007 through 29 November 2007

ER -

Design and evaluation of n-type Si_1-xGe_x as a thermoelectric-conversion material

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