A study of the synthesis of bismuth tellurium selenide nanocompounds and procedures for improving their thermoelectric performance

Cham Kim; Dong Hwan Kim; Jong Sook Kim; Yoon Soo Han; Jong Shik Chung; Hoyoung Kim

doi:10.1016/j.jallcom.2011.07.040

A study of the synthesis of bismuth tellurium selenide nanocompounds and procedures for improving their thermoelectric performance

Cham Kim, Dong Hwan Kim, Jong Sook Kim, Yoon Soo Han, Jong Shik Chung, Hoyoung Kim

Division of Nanotechnology

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

15 Scopus citations

Abstract

A bismuth tellurium selenide (Bi₂Te_ySe_3-y) nanocompound for thermoelectric applications was successfully prepared via a water-based chemical reaction in an atmospheric environment. The compound was less that ca. 100 nm in size, with a crystalline structure corresponding to the rhombohedral Bi₂Te_2.7Se_0.3. We sintered the compound via a spark plasma sintering process under the designated sintering conditions and measured the transport properties (i.e., thermal conductivity, resistivity, Seebeck coefficient). The resulting specimens consisted of nanosized grains exhibiting a remarkably low thermal conductivity. Subsequently, we endeavored to improve the other transport properties by adjusting the carrier density of the compound and derived the overall thermoelectric performance by the figure of merit (ZT).

Original language	English
Pages (from-to)	9472-9478
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	39
DOIs	https://doi.org/10.1016/j.jallcom.2011.07.040
State	Published - 29 Sep 2011

Bibliographical note

Funding Information:
This work was financially supported by the DGIST R & D Program of the Ministry of Education, Science and Technology (MoEST) of Korea (no. 11-EN-01 ).

Keywords

BiTe Se
Chemical synthesis
Nanocompound
Thermoelectrics
ZT

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10.1016/j.jallcom.2011.07.040

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title = "A study of the synthesis of bismuth tellurium selenide nanocompounds and procedures for improving their thermoelectric performance",

abstract = "A bismuth tellurium selenide (Bi2TeySe3-y) nanocompound for thermoelectric applications was successfully prepared via a water-based chemical reaction in an atmospheric environment. The compound was less that ca. 100 nm in size, with a crystalline structure corresponding to the rhombohedral Bi2Te2.7Se0.3. We sintered the compound via a spark plasma sintering process under the designated sintering conditions and measured the transport properties (i.e., thermal conductivity, resistivity, Seebeck coefficient). The resulting specimens consisted of nanosized grains exhibiting a remarkably low thermal conductivity. Subsequently, we endeavored to improve the other transport properties by adjusting the carrier density of the compound and derived the overall thermoelectric performance by the figure of merit (ZT).",

keywords = "BiTe Se, Chemical synthesis, Nanocompound, Thermoelectrics, ZT",

author = "Cham Kim and Kim, {Dong Hwan} and Kim, {Jong Sook} and Han, {Yoon Soo} and Chung, {Jong Shik} and Hoyoung Kim",

note = "Funding Information: This work was financially supported by the DGIST R & D Program of the Ministry of Education, Science and Technology (MoEST) of Korea (no. 11-EN-01 ).",

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doi = "10.1016/j.jallcom.2011.07.040",

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AU - Kim, Cham

AU - Kim, Dong Hwan

AU - Kim, Jong Sook

AU - Han, Yoon Soo

AU - Chung, Jong Shik

AU - Kim, Hoyoung

N1 - Funding Information: This work was financially supported by the DGIST R & D Program of the Ministry of Education, Science and Technology (MoEST) of Korea (no. 11-EN-01 ).

PY - 2011/9/29

Y1 - 2011/9/29

N2 - A bismuth tellurium selenide (Bi2TeySe3-y) nanocompound for thermoelectric applications was successfully prepared via a water-based chemical reaction in an atmospheric environment. The compound was less that ca. 100 nm in size, with a crystalline structure corresponding to the rhombohedral Bi2Te2.7Se0.3. We sintered the compound via a spark plasma sintering process under the designated sintering conditions and measured the transport properties (i.e., thermal conductivity, resistivity, Seebeck coefficient). The resulting specimens consisted of nanosized grains exhibiting a remarkably low thermal conductivity. Subsequently, we endeavored to improve the other transport properties by adjusting the carrier density of the compound and derived the overall thermoelectric performance by the figure of merit (ZT).

AB - A bismuth tellurium selenide (Bi2TeySe3-y) nanocompound for thermoelectric applications was successfully prepared via a water-based chemical reaction in an atmospheric environment. The compound was less that ca. 100 nm in size, with a crystalline structure corresponding to the rhombohedral Bi2Te2.7Se0.3. We sintered the compound via a spark plasma sintering process under the designated sintering conditions and measured the transport properties (i.e., thermal conductivity, resistivity, Seebeck coefficient). The resulting specimens consisted of nanosized grains exhibiting a remarkably low thermal conductivity. Subsequently, we endeavored to improve the other transport properties by adjusting the carrier density of the compound and derived the overall thermoelectric performance by the figure of merit (ZT).

KW - BiTe Se

KW - Chemical synthesis

KW - Nanocompound

KW - Thermoelectrics

KW - ZT

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DO - 10.1016/j.jallcom.2011.07.040

M3 - Article

AN - SCOPUS:80052032496

SN - 0925-8388

VL - 509

SP - 9472

EP - 9478

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 39

ER -

A study of the synthesis of bismuth tellurium selenide nanocompounds and procedures for improving their thermoelectric performance

Abstract

Bibliographical note

Keywords

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