Effect of La-doping on AgSbTe2 thermoelectric compounds

Bok Ki Min; Bong Seo Kim; Min Wook Oh; Byung Ki Ryu; Ji Eun Lee; Sung Jae Joo; Su Dong Park; Hee Woong Lee; Ho seong Lee

doi:10.3938/jkps.68.164

Effect of La-doping on AgSbTe₂ thermoelectric compounds

Bok Ki Min, Bong Seo Kim, Min Wook Oh, Byung Ki Ryu, Ji Eun Lee, Sung Jae Joo, Su Dong Park, Hee Woong Lee, Ho seong Lee

Korea Electrotechnology Research Institute

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

8 Scopus citations

Abstract

Ag(Sb_1−xLa_x)Te₂ compounds (x = 0, 0.01, 0.02, 0.03, and 0.05) were fabricated to study the effect of La-doping on the thermoelectric properties by using a spark-plasma-sintering process. All specimens were nearly single-phase AgSbTe₂ with a small amount of Ag₂Te. The La doping in AgSbTe₂ resulted in a reduction in the electrical and the thermal conductivity but increased the Seebeck coefficient. A small amount of La doping increased the Seebeck coefficient because of the electron filtering effect. The maximum figure of merit was 1.50 due to the enhanced power factor and extremely low thermal conductivity.

Original language	English
Pages (from-to)	164-169
Number of pages	6
Journal	Journal of the Korean Physical Society
Volume	68
Issue number	1
DOIs	https://doi.org/10.3938/jkps.68.164
State	Published - 1 Jan 2016

Keywords

AgSbTe
Doping
Lanthanum
Thermoelectric

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10.3938/jkps.68.164

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title = "Effect of La-doping on AgSbTe2 thermoelectric compounds",

abstract = "Ag(Sb1−xLax)Te2 compounds (x = 0, 0.01, 0.02, 0.03, and 0.05) were fabricated to study the effect of La-doping on the thermoelectric properties by using a spark-plasma-sintering process. All specimens were nearly single-phase AgSbTe2 with a small amount of Ag2Te. The La doping in AgSbTe2 resulted in a reduction in the electrical and the thermal conductivity but increased the Seebeck coefficient. A small amount of La doping increased the Seebeck coefficient because of the electron filtering effect. The maximum figure of merit was 1.50 due to the enhanced power factor and extremely low thermal conductivity.",

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T1 - Effect of La-doping on AgSbTe2 thermoelectric compounds

AU - Min, Bok Ki

AU - Kim, Bong Seo

AU - Oh, Min Wook

AU - Ryu, Byung Ki

AU - Lee, Ji Eun

AU - Joo, Sung Jae

AU - Park, Su Dong

AU - Lee, Hee Woong

AU - Lee, Ho seong

PY - 2016/1/1

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N2 - Ag(Sb1−xLax)Te2 compounds (x = 0, 0.01, 0.02, 0.03, and 0.05) were fabricated to study the effect of La-doping on the thermoelectric properties by using a spark-plasma-sintering process. All specimens were nearly single-phase AgSbTe2 with a small amount of Ag2Te. The La doping in AgSbTe2 resulted in a reduction in the electrical and the thermal conductivity but increased the Seebeck coefficient. A small amount of La doping increased the Seebeck coefficient because of the electron filtering effect. The maximum figure of merit was 1.50 due to the enhanced power factor and extremely low thermal conductivity.

AB - Ag(Sb1−xLax)Te2 compounds (x = 0, 0.01, 0.02, 0.03, and 0.05) were fabricated to study the effect of La-doping on the thermoelectric properties by using a spark-plasma-sintering process. All specimens were nearly single-phase AgSbTe2 with a small amount of Ag2Te. The La doping in AgSbTe2 resulted in a reduction in the electrical and the thermal conductivity but increased the Seebeck coefficient. A small amount of La doping increased the Seebeck coefficient because of the electron filtering effect. The maximum figure of merit was 1.50 due to the enhanced power factor and extremely low thermal conductivity.

KW - AgSbTe

KW - Doping

KW - Lanthanum

KW - Thermoelectric

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EP - 169

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

IS - 1

ER -

Effect of La-doping on AgSbTe₂ thermoelectric compounds

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Keywords

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