State of the art Ag50-xSbxSe50-yTey alloys: Their high zT values, microstructures and related phase equilibria

Hsin Jay Wu; Tian Wey Lan; Sinn Wen Chen; Yang Yuan Chen; Tristan Day; G. Jeffery Snyder

doi:10.1016/j.actamat.2015.04.011

State of the art Ag_50-_xSb_xSe_50-_yTe_y alloys: Their high zT values, microstructures and related phase equilibria

Hsin Jay Wu, Tian Wey Lan, Sinn Wen Chen^*, Yang Yuan Chen, Tristan Day, G. Jeffery Snyder

^*Corresponding author for this work

Materials Science and Engineering

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

20 Scopus citations

Abstract

Turning waste heat into electricity using thermoelectric materials supports the crucial goals of the sustainable development. Two ternary chalcogenide compounds, the AgSbTe₂ and AgSbSe₂, are viewed as prospective candidates for mid-temperature waste heat recovery (600-800 K). Alloying between the cubic AgSbTe₂ and AgSbSe₂ yields to the very high zT peak value of 1.4 in Ag₂₅Sb₂₅Se₁₀Te₄₀ and Ag₂₅Sb₂₅Se₅Te₄₅ at 680 K, which are nearly 40% and 250% higher than those of undoped AgSbTe₂ (zT ∼ 1) and AgSbSe₂ (zT ∼ 0.4). The relations between the phase stability, the carrier concentration and the electronic/thermal transport property are understood by conducting comprehensive study along the pseudo-binary AgSbSe₂-AgSbTe₂ system with varying values of x and y in Ag_50-_xSb_xSe_50-_yTe_y (25 ≤ x ≤ 30, y ≤ 50).

Original language	English (US)
Pages (from-to)	38-45
Number of pages	8
Journal	Acta Materialia
Volume	93
DOIs	https://doi.org/10.1016/j.actamat.2015.04.011
State	Published - Jul 1 2015

Keywords

AgSbSe
AgSbTe
Phase diagrams
Thermoelectric
zT

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Access to Document

10.1016/j.actamat.2015.04.011

Cite this

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title = "State of the art Ag50-xSbxSe50-yTey alloys: Their high zT values, microstructures and related phase equilibria",

abstract = "Turning waste heat into electricity using thermoelectric materials supports the crucial goals of the sustainable development. Two ternary chalcogenide compounds, the AgSbTe2 and AgSbSe2, are viewed as prospective candidates for mid-temperature waste heat recovery (600-800 K). Alloying between the cubic AgSbTe2 and AgSbSe2 yields to the very high zT peak value of 1.4 in Ag25Sb25Se10Te40 and Ag25Sb25Se5Te45 at 680 K, which are nearly 40% and 250% higher than those of undoped AgSbTe2 (zT ∼ 1) and AgSbSe2 (zT ∼ 0.4). The relations between the phase stability, the carrier concentration and the electronic/thermal transport property are understood by conducting comprehensive study along the pseudo-binary AgSbSe2-AgSbTe2 system with varying values of x and y in Ag50-xSbxSe50-yTey (25 ≤ x ≤ 30, y ≤ 50).",

keywords = "AgSbSe, AgSbTe, Phase diagrams, Thermoelectric, zT",

author = "Wu, {Hsin Jay} and Lan, {Tian Wey} and Chen, {Sinn Wen} and Chen, {Yang Yuan} and Tristan Day and Snyder, {G. Jeffery}",

note = "Funding Information: The authors acknowledge the financial support of the National Science Council of Taiwan ( 100-2221-E-155-019 , 101-3113-P-008-001 ). TD and GJS acknowledge support of AFOSR MURI.",

year = "2015",

month = jul,

day = "1",

doi = "10.1016/j.actamat.2015.04.011",

language = "English (US)",

volume = "93",

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T1 - State of the art Ag50-xSbxSe50-yTey alloys

T2 - Their high zT values, microstructures and related phase equilibria

AU - Wu, Hsin Jay

AU - Lan, Tian Wey

AU - Chen, Sinn Wen

AU - Chen, Yang Yuan

AU - Day, Tristan

AU - Snyder, G. Jeffery

N1 - Funding Information: The authors acknowledge the financial support of the National Science Council of Taiwan ( 100-2221-E-155-019 , 101-3113-P-008-001 ). TD and GJS acknowledge support of AFOSR MURI.

PY - 2015/7/1

Y1 - 2015/7/1

N2 - Turning waste heat into electricity using thermoelectric materials supports the crucial goals of the sustainable development. Two ternary chalcogenide compounds, the AgSbTe2 and AgSbSe2, are viewed as prospective candidates for mid-temperature waste heat recovery (600-800 K). Alloying between the cubic AgSbTe2 and AgSbSe2 yields to the very high zT peak value of 1.4 in Ag25Sb25Se10Te40 and Ag25Sb25Se5Te45 at 680 K, which are nearly 40% and 250% higher than those of undoped AgSbTe2 (zT ∼ 1) and AgSbSe2 (zT ∼ 0.4). The relations between the phase stability, the carrier concentration and the electronic/thermal transport property are understood by conducting comprehensive study along the pseudo-binary AgSbSe2-AgSbTe2 system with varying values of x and y in Ag50-xSbxSe50-yTey (25 ≤ x ≤ 30, y ≤ 50).

AB - Turning waste heat into electricity using thermoelectric materials supports the crucial goals of the sustainable development. Two ternary chalcogenide compounds, the AgSbTe2 and AgSbSe2, are viewed as prospective candidates for mid-temperature waste heat recovery (600-800 K). Alloying between the cubic AgSbTe2 and AgSbSe2 yields to the very high zT peak value of 1.4 in Ag25Sb25Se10Te40 and Ag25Sb25Se5Te45 at 680 K, which are nearly 40% and 250% higher than those of undoped AgSbTe2 (zT ∼ 1) and AgSbSe2 (zT ∼ 0.4). The relations between the phase stability, the carrier concentration and the electronic/thermal transport property are understood by conducting comprehensive study along the pseudo-binary AgSbSe2-AgSbTe2 system with varying values of x and y in Ag50-xSbxSe50-yTey (25 ≤ x ≤ 30, y ≤ 50).

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KW - zT

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