Preparation and thermoelectric properties of quaternary bismuth telluride-indium selenide compound

Ju Hyuk Yim; Kyooho Jung; Myong Jae Yoo; Hyung Ho Park; Jin Sang Kim; Chan Park

doi:10.1016/j.cap.2011.02.026

Preparation and thermoelectric properties of quaternary bismuth telluride-indium selenide compound

Ju Hyuk Yim, Kyooho Jung, Myong Jae Yoo, Hyung Ho Park, Jin Sang Kim, Chan Park

Department of Materials Science and Engineering

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

4 Citations (Scopus)

Abstract

Quaternary In-Se-Bi-Te compounds (7.5Bi₂Te₃-In ₂Se₃ and 7.5Bi₂Te₃-In ₄Se₃) were prepared by water quenching and annealing, and the microstructures and thermoelectric properties were investigated. These materials were solidified to near-eutectic compositions in order to obtain micro-scale heterointerfaces. The formation of sub-micrometer-scale lamellae layers of Bi₂Te₃ and In-Se-Te compounds was observed. Through quenching, the 7.5Bi₂Te₃-In₂Se ₃ consisted of a Bi₂Te₃ and In-Se-Te compound, while the 7.5Bi₂Te₃-In₄Se₃ was composed of Bi₂Te₃, BiTe, and In₄Se₃ and In-Se-Te. Both the microstructure and the constituent phases changed after annealing. The reduction of thermal conductivities, as compared to that of bulk Bi₂Te₃, was confirmed. This result can be attributed to the increased number of phase boundary areas. The size of the decomposed phase could be controlled by changing the parameters of the annealing process, which could further decrease the thermal conductivity.

Original language	English
Pages (from-to)	S46-S49
Journal	Current Applied Physics
Volume	11
Issue number	4 SUPPL.
DOIs	https://doi.org/10.1016/j.cap.2011.02.026
Publication status	Published - 2011 Jul

Bibliographical note

Funding Information:
This research was supported by the Converging Research Center Program through the Ministry of Education, Science and Technology ( 2010K000979 ) and the Core Technology of Materials Research and Development Program of the Korea Ministry of Intelligence and Economy ( #K0006007 ).

All Science Journal Classification (ASJC) codes

Materials Science(all)
Physics and Astronomy(all)

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10.1016/j.cap.2011.02.026

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title = "Preparation and thermoelectric properties of quaternary bismuth telluride-indium selenide compound",

abstract = "Quaternary In-Se-Bi-Te compounds (7.5Bi2Te3-In 2Se3 and 7.5Bi2Te3-In 4Se3) were prepared by water quenching and annealing, and the microstructures and thermoelectric properties were investigated. These materials were solidified to near-eutectic compositions in order to obtain micro-scale heterointerfaces. The formation of sub-micrometer-scale lamellae layers of Bi2Te3 and In-Se-Te compounds was observed. Through quenching, the 7.5Bi2Te3-In2Se 3 consisted of a Bi2Te3 and In-Se-Te compound, while the 7.5Bi2Te3-In4Se3 was composed of Bi2Te3, BiTe, and In4Se3 and In-Se-Te. Both the microstructure and the constituent phases changed after annealing. The reduction of thermal conductivities, as compared to that of bulk Bi2Te3, was confirmed. This result can be attributed to the increased number of phase boundary areas. The size of the decomposed phase could be controlled by changing the parameters of the annealing process, which could further decrease the thermal conductivity.",

author = "Yim, {Ju Hyuk} and Kyooho Jung and Yoo, {Myong Jae} and Park, {Hyung Ho} and Kim, {Jin Sang} and Chan Park",

note = "Funding Information: This research was supported by the Converging Research Center Program through the Ministry of Education, Science and Technology ( 2010K000979 ) and the Core Technology of Materials Research and Development Program of the Korea Ministry of Intelligence and Economy ( #K0006007 ).",

year = "2011",

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doi = "10.1016/j.cap.2011.02.026",

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T1 - Preparation and thermoelectric properties of quaternary bismuth telluride-indium selenide compound

AU - Yim, Ju Hyuk

AU - Jung, Kyooho

AU - Yoo, Myong Jae

AU - Park, Hyung Ho

AU - Kim, Jin Sang

AU - Park, Chan

N1 - Funding Information: This research was supported by the Converging Research Center Program through the Ministry of Education, Science and Technology ( 2010K000979 ) and the Core Technology of Materials Research and Development Program of the Korea Ministry of Intelligence and Economy ( #K0006007 ).

PY - 2011/7

Y1 - 2011/7

N2 - Quaternary In-Se-Bi-Te compounds (7.5Bi2Te3-In 2Se3 and 7.5Bi2Te3-In 4Se3) were prepared by water quenching and annealing, and the microstructures and thermoelectric properties were investigated. These materials were solidified to near-eutectic compositions in order to obtain micro-scale heterointerfaces. The formation of sub-micrometer-scale lamellae layers of Bi2Te3 and In-Se-Te compounds was observed. Through quenching, the 7.5Bi2Te3-In2Se 3 consisted of a Bi2Te3 and In-Se-Te compound, while the 7.5Bi2Te3-In4Se3 was composed of Bi2Te3, BiTe, and In4Se3 and In-Se-Te. Both the microstructure and the constituent phases changed after annealing. The reduction of thermal conductivities, as compared to that of bulk Bi2Te3, was confirmed. This result can be attributed to the increased number of phase boundary areas. The size of the decomposed phase could be controlled by changing the parameters of the annealing process, which could further decrease the thermal conductivity.

AB - Quaternary In-Se-Bi-Te compounds (7.5Bi2Te3-In 2Se3 and 7.5Bi2Te3-In 4Se3) were prepared by water quenching and annealing, and the microstructures and thermoelectric properties were investigated. These materials were solidified to near-eutectic compositions in order to obtain micro-scale heterointerfaces. The formation of sub-micrometer-scale lamellae layers of Bi2Te3 and In-Se-Te compounds was observed. Through quenching, the 7.5Bi2Te3-In2Se 3 consisted of a Bi2Te3 and In-Se-Te compound, while the 7.5Bi2Te3-In4Se3 was composed of Bi2Te3, BiTe, and In4Se3 and In-Se-Te. Both the microstructure and the constituent phases changed after annealing. The reduction of thermal conductivities, as compared to that of bulk Bi2Te3, was confirmed. This result can be attributed to the increased number of phase boundary areas. The size of the decomposed phase could be controlled by changing the parameters of the annealing process, which could further decrease the thermal conductivity.

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Preparation and thermoelectric properties of quaternary bismuth telluride-indium selenide compound

Abstract

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