Thermoelectric characteristics of Sb2Te3 thin films formed via surfactant-assisted electrodeposition

In Joon Yoo, Youngsup Song, Dong Chan Lim, Nosang V. Myung, Kyu Hyoung Lee, Minju Oh, Dongyun Lee, Yang Do Kim, Seil Kim, Yong Ho Choa, Joo Yul Lee, Kyu Hwan Lee, Jae Hong Lim

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

In this study, Sb2Te3 films were electrodeposited potentiostatically at room temperature from acidic nitric baths in the presence of a surfactant, cetyltrimethylammonium bromide (CTAB). This resulted in improvements in the surface morphologies of the films. The thus-deposited films also exhibited better adherence to their substrates. In addition, the carrier transport properties of the Sb2Te3 films, including their electrical conductivities and Seebeck coefficient values, could be improved by annealing them at 200 °C. This was due to the formation of Te nanodots in the Sb2Te3 matrix. The resulting Sb2Te 3 films with Te nanodots 10-20 nm in size and a dispersion density of 11.4 vol% exhibited a high power factor of 716.0 μW m-1 K -2, which was about two times higher than that of Sb 2Te3 films that did not contain Te nanodots. The results of the study suggested that the improvements in the thermoelectric characteristics of the films were due to carrier energy filtering at the Te-Sb2Te3 interface.

Original languageEnglish
Pages (from-to)5430-5435
Number of pages6
JournalJournal of Materials Chemistry A
Volume1
Issue number17
DOIs
Publication statusPublished - 2013 May 7

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Electrodeposition
Surface-Active Agents
Surface active agents
Thin films
Seebeck coefficient
Carrier transport
Transport properties
Surface morphology
Annealing
Substrates

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Yoo, In Joon ; Song, Youngsup ; Chan Lim, Dong ; Myung, Nosang V. ; Lee, Kyu Hyoung ; Oh, Minju ; Lee, Dongyun ; Kim, Yang Do ; Kim, Seil ; Choa, Yong Ho ; Lee, Joo Yul ; Lee, Kyu Hwan ; Lim, Jae Hong. / Thermoelectric characteristics of Sb2Te3 thin films formed via surfactant-assisted electrodeposition. In: Journal of Materials Chemistry A. 2013 ; Vol. 1, No. 17. pp. 5430-5435.
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author = "Yoo, {In Joon} and Youngsup Song and {Chan Lim}, Dong and Myung, {Nosang V.} and Lee, {Kyu Hyoung} and Minju Oh and Dongyun Lee and Kim, {Yang Do} and Seil Kim and Choa, {Yong Ho} and Lee, {Joo Yul} and Lee, {Kyu Hwan} and Lim, {Jae Hong}",
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Yoo, IJ, Song, Y, Chan Lim, D, Myung, NV, Lee, KH, Oh, M, Lee, D, Kim, YD, Kim, S, Choa, YH, Lee, JY, Lee, KH & Lim, JH 2013, 'Thermoelectric characteristics of Sb2Te3 thin films formed via surfactant-assisted electrodeposition', Journal of Materials Chemistry A, vol. 1, no. 17, pp. 5430-5435. https://doi.org/10.1039/c3ta01631e

Thermoelectric characteristics of Sb2Te3 thin films formed via surfactant-assisted electrodeposition. / Yoo, In Joon; Song, Youngsup; Chan Lim, Dong; Myung, Nosang V.; Lee, Kyu Hyoung; Oh, Minju; Lee, Dongyun; Kim, Yang Do; Kim, Seil; Choa, Yong Ho; Lee, Joo Yul; Lee, Kyu Hwan; Lim, Jae Hong.

In: Journal of Materials Chemistry A, Vol. 1, No. 17, 07.05.2013, p. 5430-5435.

Research output: Contribution to journalArticle

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AU - Yoo, In Joon

AU - Song, Youngsup

AU - Chan Lim, Dong

AU - Myung, Nosang V.

AU - Lee, Kyu Hyoung

AU - Oh, Minju

AU - Lee, Dongyun

AU - Kim, Yang Do

AU - Kim, Seil

AU - Choa, Yong Ho

AU - Lee, Joo Yul

AU - Lee, Kyu Hwan

AU - Lim, Jae Hong

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Y1 - 2013/5/7

N2 - In this study, Sb2Te3 films were electrodeposited potentiostatically at room temperature from acidic nitric baths in the presence of a surfactant, cetyltrimethylammonium bromide (CTAB). This resulted in improvements in the surface morphologies of the films. The thus-deposited films also exhibited better adherence to their substrates. In addition, the carrier transport properties of the Sb2Te3 films, including their electrical conductivities and Seebeck coefficient values, could be improved by annealing them at 200 °C. This was due to the formation of Te nanodots in the Sb2Te3 matrix. The resulting Sb2Te 3 films with Te nanodots 10-20 nm in size and a dispersion density of 11.4 vol% exhibited a high power factor of 716.0 μW m-1 K -2, which was about two times higher than that of Sb 2Te3 films that did not contain Te nanodots. The results of the study suggested that the improvements in the thermoelectric characteristics of the films were due to carrier energy filtering at the Te-Sb2Te3 interface.

AB - In this study, Sb2Te3 films were electrodeposited potentiostatically at room temperature from acidic nitric baths in the presence of a surfactant, cetyltrimethylammonium bromide (CTAB). This resulted in improvements in the surface morphologies of the films. The thus-deposited films also exhibited better adherence to their substrates. In addition, the carrier transport properties of the Sb2Te3 films, including their electrical conductivities and Seebeck coefficient values, could be improved by annealing them at 200 °C. This was due to the formation of Te nanodots in the Sb2Te3 matrix. The resulting Sb2Te 3 films with Te nanodots 10-20 nm in size and a dispersion density of 11.4 vol% exhibited a high power factor of 716.0 μW m-1 K -2, which was about two times higher than that of Sb 2Te3 films that did not contain Te nanodots. The results of the study suggested that the improvements in the thermoelectric characteristics of the films were due to carrier energy filtering at the Te-Sb2Te3 interface.

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