Thermoelectric performance of single phase p-type quaternary (PbTe)0.65–x(PbSe)0.35(PbS)x alloys

MANETTAS, Andrew, SANTOS, Rafael, FERRERES, Xavier Reales and AMINORROAYA YAMINI, Sima (2018). Thermoelectric performance of single phase p-type quaternary (PbTe)0.65–x(PbSe)0.35(PbS)x alloys. ACS Applied Energy Materials, 1 (5), 1898-1903.

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Recently, the quaternary system PbTe−PbSe−PbS has been shown to provide high thermoelectric efficiency, zT. The intent of this research is to investigate the thermoelectric properties of Na-doped pseudoternary (PbTe)0.65−x(PbSe)0.35(PbS)x with a high ratio of PbS to PbTe. The addition of a large concentration of PbSe increases the solubility limit of PbS in PbTe, allowing all samples to behave as solid solutions with a high concentration of PbS. This is proven to decrease lattice thermal conductivity due to the larger atomic mass contrast between sulfur and tellurium; however, it simultaneously causes a decrease in the Seebeck coefficient due to a larger band offset, so a high concentration of PbS shows no improvement in zT, with a maximum of ∼1.4 in the x = 0, 0.05, and 0.10 samples.

Item Type: Article
Additional Information: ** From Crossref via Jisc Publications Router.
Uncontrolled Keywords: p-type, thermal conductivity, XRD, Pb chalcogenide, electronic band structure
Departments - Does NOT include content added after October 2018: Faculty of Science, Technology and Arts > Department of Engineering and Mathematics
Identification Number:
Page Range: 1898-1903
SWORD Depositor: Margaret Boot
Depositing User: Margaret Boot
Date Deposited: 26 Apr 2018 09:25
Last Modified: 18 Mar 2021 01:16

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