Optimizations of Pulsed Plated p and n-type Bi2Te3-Based Ternary Compounds by Annealing in Different Ambient Atmospheres

Schumacher C, Reinsberg KG, Rostek R, Akinsinde L, Baessler S, Zastrow S, Rampelberg G, Woias P, Detavernier C, Broekaert JAC, Bachmann J, Nielsch K (2013)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2013

Journal

Advanced Energy Materials Wiley

Publisher: Wiley-VCH Verlag

Book Volume: 3

Pages Range: 95-104

DOI: 10.1002/aenm.201200417

Abstract

This work presents a comprehensive study of the fabrication and optimization of electrodeposited p- and n-type thermoelectric films. The films are deposited on Au and stainless steel substrates over a wide range of deposition potentials. The influence of the preparative parameters such as the composition of the electrolyte bath and the deposition potential are investigated. Furthermore, the p-doped (BixSb1-x)2Te3 and the n-doped Bi2(TexSe1-x)3 films are annealed for a period of about 1 h under helium and under tellurium atmosphere at 250 degrees C for 60h. Annealing in He already leads to significant improvements in the thermoelectric performance. Furthermore, due to the equilibrium conditions during the process, annealing in Te atmosphere leads to a strongly improved film composition, charge carrier density and mobility. The Seebeck coefficients increase to values up to +182 mu V K-1 for p-doped and130 mu V K-1 for n-doped materials at room temperature. The power factors also exhibit improvements with 1320 mu W m-1 K-2 and 820 mu W m-1 K-2 for p-doped and n-doped films, respectively. Additionally, in-situ XRD measurements performed during annealing of the films up to 600K under He atmosphere show stepwise improvements of the crystal structure leading to the improvements in thermoelectric parameters. The thermal conductivity is between 1.2 W m-1 K-1 and 1.0 W m-1 K-1.

Authors with CRIS profile

Julien Bachmann Lehrstuhl für Chemistry of thin film materials

Involved external institutions

Universität Hamburg (UHH) DE Germany (DE) Albert-Ludwigs-Universität Freiburg DE Germany (DE) Universiteit Gent (UGent) / Ghent University BE Belgium (BE)

How to cite

APA:

Schumacher, C., Reinsberg, K.G., Rostek, R., Akinsinde, L., Baessler, S., Zastrow, S.,... Nielsch, K. (2013). Optimizations of Pulsed Plated p and n-type Bi2Te3-Based Ternary Compounds by Annealing in Different Ambient Atmospheres. Advanced Energy Materials, 3, 95-104. https://dx.doi.org/10.1002/aenm.201200417

MLA:

Schumacher, Christian, et al. "Optimizations of Pulsed Plated p and n-type Bi2Te3-Based Ternary Compounds by Annealing in Different Ambient Atmospheres." Advanced Energy Materials 3 (2013): 95-104.

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