Thermoelectric properties of n-type (Bi2Se3)x(Bi2Te3)1-x prepared by bulk mechanical alloying and hot pressing

J. Y. Yang; T. Aizawa; A. Yamamoto; T. Ohta

doi:10.1016/S0925-8388(00)01159-2

Thermoelectric properties of n-type (Bi₂Se₃)_x(Bi₂Te₃)_1-x prepared by bulk mechanical alloying and hot pressing

J. Y. Yang, T. Aizawa, A. Yamamoto, T. Ohta

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

151 Citations (Scopus)

Abstract

Starting from element Bi, Se and Te granules, n-type (Bi₂Se₃)_x(Bi₂Te₃)_1-x with different chemical composition (x = 0.025, 0.05, 0.075, 0.10 and 0.15) were prepared via bulk mechanical alloying (BMA) and hot pressing (HP). Effects of chemical composition, doping content and annealing on thermoelectric properties were reported. The range x≤0.050 is more favorable than other chemical compositions for the thermoelectric properties of BMAed (Bi₂Se₃)_x(Bi₂Te₃)_1-x. When doping with SbI₃, both the electrical resistivity and the Seebeck coefficient of (Bi₂Se₃)_0.05(Bi₂Te₃)_0.95 decrease, thus resulting in no improvement of the figure of merit. On the other hand, annealing the as-HPed (Bi₂Se₃)_0.05(Bi₂Te₃)_0.95 a sufficiently long time is helpful to improve thermoelectric properties, and the maximum figure of merit of (Bi₂Se₃)_0.05(Bi₂Te₃)_0.95 is 2.31×10^-3 /K.

Original language	English
Pages (from-to)	326-330
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	312
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(00)01159-2
Publication status	Published - 2000 Nov 16

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Thermoelectric properties of n-type (Bi2Se3)x(Bi2Te3)1-x prepared by bulk mechanical alloying and hot pressing",

abstract = "Starting from element Bi, Se and Te granules, n-type (Bi2Se3)x(Bi2Te3)1-x with different chemical composition (x = 0.025, 0.05, 0.075, 0.10 and 0.15) were prepared via bulk mechanical alloying (BMA) and hot pressing (HP). Effects of chemical composition, doping content and annealing on thermoelectric properties were reported. The range x≤0.050 is more favorable than other chemical compositions for the thermoelectric properties of BMAed (Bi2Se3)x(Bi2Te3)1-x. When doping with SbI3, both the electrical resistivity and the Seebeck coefficient of (Bi2Se3)0.05(Bi2Te3)0.95 decrease, thus resulting in no improvement of the figure of merit. On the other hand, annealing the as-HPed (Bi2Se3)0.05(Bi2Te3)0.95 a sufficiently long time is helpful to improve thermoelectric properties, and the maximum figure of merit of (Bi2Se3)0.05(Bi2Te3)0.95 is 2.31×10-3 /K.",

author = "Yang, {J. Y.} and T. Aizawa and A. Yamamoto and T. Ohta",

year = "2000",

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doi = "10.1016/S0925-8388(00)01159-2",

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T1 - Thermoelectric properties of n-type (Bi2Se3)x(Bi2Te3)1-x prepared by bulk mechanical alloying and hot pressing

AU - Yang, J. Y.

AU - Aizawa, T.

AU - Yamamoto, A.

AU - Ohta, T.

PY - 2000/11/16

Y1 - 2000/11/16

N2 - Starting from element Bi, Se and Te granules, n-type (Bi2Se3)x(Bi2Te3)1-x with different chemical composition (x = 0.025, 0.05, 0.075, 0.10 and 0.15) were prepared via bulk mechanical alloying (BMA) and hot pressing (HP). Effects of chemical composition, doping content and annealing on thermoelectric properties were reported. The range x≤0.050 is more favorable than other chemical compositions for the thermoelectric properties of BMAed (Bi2Se3)x(Bi2Te3)1-x. When doping with SbI3, both the electrical resistivity and the Seebeck coefficient of (Bi2Se3)0.05(Bi2Te3)0.95 decrease, thus resulting in no improvement of the figure of merit. On the other hand, annealing the as-HPed (Bi2Se3)0.05(Bi2Te3)0.95 a sufficiently long time is helpful to improve thermoelectric properties, and the maximum figure of merit of (Bi2Se3)0.05(Bi2Te3)0.95 is 2.31×10-3 /K.

AB - Starting from element Bi, Se and Te granules, n-type (Bi2Se3)x(Bi2Te3)1-x with different chemical composition (x = 0.025, 0.05, 0.075, 0.10 and 0.15) were prepared via bulk mechanical alloying (BMA) and hot pressing (HP). Effects of chemical composition, doping content and annealing on thermoelectric properties were reported. The range x≤0.050 is more favorable than other chemical compositions for the thermoelectric properties of BMAed (Bi2Se3)x(Bi2Te3)1-x. When doping with SbI3, both the electrical resistivity and the Seebeck coefficient of (Bi2Se3)0.05(Bi2Te3)0.95 decrease, thus resulting in no improvement of the figure of merit. On the other hand, annealing the as-HPed (Bi2Se3)0.05(Bi2Te3)0.95 a sufficiently long time is helpful to improve thermoelectric properties, and the maximum figure of merit of (Bi2Se3)0.05(Bi2Te3)0.95 is 2.31×10-3 /K.

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Thermoelectric properties of n-type (Bi₂Se₃)_x(Bi₂Te₃)_1-x prepared by bulk mechanical alloying and hot pressing

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