Issue 17, 2013
From the journal:

Journal of Materials Chemistry A

Thermoelectric characteristics of Sb2Te3 thin films formed viasurfactant-assisted electrodeposition†

In-Joon Yoo,ab   Youngsup Song,a   Dong Chan Lim,a   Nosang V. Myung,c   Kyu Hyoung Lee,d   Minju Oh,e   Dongyun Lee,e   Yang Do Kim,b   Seil Kim,f   Yong-Ho Choa,f   Joo Yul Lee,a   Kyu Hwan Leea  and  Jae-Hong Lim*a  

* Corresponding authors

a Electrochemistry Department, Korea Institute of Materials Science, Changwon 641-010, Korea
E-mail: lim@kims.re.kr

b School of Materials Science and Engineering, Pusan National University, Busan 609-735, Korea

c Department of Chemical and Environmental Engineering, University of California-Riverside, Riverside, CA 92521, USA

d Advanced Materials Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, Yongin 446-712, Korea

e Department of NanoFusion Technology, Pusan National University, Busan 609-735, Korea

f Department of Bionano Technology, Hanyang University, Ansan 426-791, Korea

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 Sb2Te3 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 Sb2Te3 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.

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

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Article information

DOI
https://doi.org/10.1039/C3TA01631E
Article type
Paper
Submitted
24 Dec 2012
Accepted
04 Mar 2013
First published
05 Mar 2013

J. Mater. Chem. A, 2013,1, 5430-5435

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

I. Yoo, Y. Song, D. Chan Lim, N. V. Myung, K. H. Lee, M. Oh, D. Lee, Y. D. Kim, S. Kim, Y. Choa, J. Y. Lee, K. H. Lee and J. Lim, J. Mater. Chem. A, 2013, 1, 5430 DOI: 10.1039/C3TA01631E

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