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Influence of Thermal Aging Phenomena on Thermoelectric Properties of Al-Substituted ZnO

Vogel-Schäuble, Nina ; Dujardin, Raphaël ; Weidenkaff, Anke ; Aguirre, Myriam

In: Journal of Electronic Materials, 2012, vol. 41, no. 6, p. 1606-1614

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    Titel
    • Influence of Thermal Aging Phenomena on Thermoelectric Properties of Al-Substituted ZnO
    Autor
    • Vogel-Schäuble, Nina. Laboratory of Solid State Chemistry and Catalysis, Empa, Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600, Duebendorf, Switzerland
    • Dujardin, Raphaël. Laboratory of Solid State Chemistry and Catalysis, Empa, Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600, Duebendorf, Switzerland
    • Weidenkaff, Anke. Laboratory of Solid State Chemistry and Catalysis, Empa, Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600, Duebendorf, Switzerland
    • Aguirre, Myriam. Laboratory of Solid State Chemistry and Catalysis, Empa, Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600, Duebendorf, Switzerland
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Journal of Electronic Materials, 2012, vol. 41, no. 6, p. 1606-1614. Springer US; http://www.springer-ny.com
    Andere elektronische Ausgabe
    OAI-PMH-ID
    • oai:doc.rero.ch:320345
    Summary
    The thermoelectric properties and stability of Al-substituted ZnO as a potential high-temperature n-type material were studied in heating-cooling cycles. Zn1−x Al x O (x=0.02, 0.06) was prepared by soft chemistry and solid-state reaction synthesis methods. Cycling during the thermoelectric measurement leads to an increase of the electrical resistivity and Seebeck coefficient values. The reason for this aging phenomenon can be assigned to a change in composition due to oxygen uptake along with modification in the defect concentrations. The aging is enhanced if the cycling is performed in oxygen. ZT value of 0.21 is reached at 1275K for samples with 2% Al substitution made by soft chemistry synthesis