Journal article

Structural and Thermoelectric Properties of Nanostructured Nominally Stoichiometric Pb1-x Bi x Te Prepared by Mechanical Alloying


Authors listFalkenbach, Oliver; Loeh, Marc O.; Wiegand, Christoph W.; Schmitz, Andreas; Hartung, David; Koch, Guenter; Klar, Peter J.; Mueller, Eckhard; Schlecht, Sabine

Publication year2017

Pages5781-5791

JournalJournal of Electronic Materials

Volume number46

Issue number10

ISSN0361-5235

eISSN1543-186X

DOI Linkhttps://doi.org/10.1007/s11664-017-5607-5

PublisherElectron Devices Society


Abstract
We have investigated the influence of substituting bismuth for lead in lead telluride. The material was nanostructured by mechanical alloying and compacted via short-term sintering or hot pressing. Synthesis of samples with substitution up to 6 at.% bismuth was carried out twice to ensure reproducibility. All relevant thermoelectric transport parameters were measured in a wide temperature range from 123 K or 173 K to 773 K. Two different techniques for measuring the electrical conductivity and Seebeck coefficient were used, one at low and the other at high temperature. Higher bismuth content of 4 at.% to 6 at.% was found to result in the best thermoelectric properties, with maximum ZT value of about 0.7 at 723 K for 4.0 at.% bismuth. The structure was examined in detail via x-ray diffraction analysis, Raman spectroscopy, and transmission electron microscopy. A key feature of the microstructure was the inhomogeneous distribution of bismuth in the lead telluride matrix and the occurrence of bismuth-rich regions on the nanoscale, related to remarkably increased carrier concentration and mobility.



Citation Styles

Harvard Citation styleFalkenbach, O., Loeh, M., Wiegand, C., Schmitz, A., Hartung, D., Koch, G., et al. (2017) Structural and Thermoelectric Properties of Nanostructured Nominally Stoichiometric Pb1-x Bi x Te Prepared by Mechanical Alloying, Journal of Electronic Materials, 46(10), pp. 5781-5791. https://doi.org/10.1007/s11664-017-5607-5

APA Citation styleFalkenbach, O., Loeh, M., Wiegand, C., Schmitz, A., Hartung, D., Koch, G., Klar, P., Mueller, E., & Schlecht, S. (2017). Structural and Thermoelectric Properties of Nanostructured Nominally Stoichiometric Pb1-x Bi x Te Prepared by Mechanical Alloying. Journal of Electronic Materials. 46(10), 5781-5791. https://doi.org/10.1007/s11664-017-5607-5



Keywords


BI2TE3compacting methodsDOPED LEAD-TELLURIDEMOLECULAR-BEAM EPITAXYPBTEtemperature treatmentThermoelectric materialsVAPOR-PRESSURE

Last updated on 2025-02-04 at 01:31