Significant enhancement in the thermoelectric performance of a bismuth telluride nanocompound through brief fabrication procedures

ACS Applied Materials & Interfaces
Cham KimJong Shik Chung

Abstract

A binary BiTe nanocompound for thermoelectric applications was prepared via a water-based chemical reaction under atmospheric conditions. We attempted to increase the carrier mobility of the nanocompound by adopting a post-thermal treatment consisting of calcination and reduction at different temperatures. We also tried to control the carrier density of the compound by adjusting the stoichiometry of the atomic constituents. We measured other transport properties (i.e., electrical resistivity, Seebeck coefficient, and thermal conductivity) and observed how these properties were affected by both the carrier mobility and the carrier density. We derived the thermoelectric performance, as captured by the figure of merit (ZT), from the transport properties and discussed the effect of such properties on the ZT value. The nanocompound exhibited a very competent ZT value (0.91 at 100 °C), which is one of the best thermoelectric performances of chemically synthesized BiTe materials.

References

Feb 7, 2004·Science·Kuei Fang HsuMercouri G Kanatzidis
Jun 29, 2004·Nature Materials·G Jeffrey SnyderBo Brummerstedt Iversen
Dec 9, 2010·Journal of Nanoscience and Nanotechnology·Shanghua LiEckhard Müller

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Citations

May 6, 2015·Annual Review of Chemical and Biomolecular Engineering·Scott W FinefrockYue Wu
Jul 9, 2014·Journal of the American Chemical Society·Haoran YangYue Wu

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