Journal
PHILOSOPHICAL MAGAZINE LETTERS
Volume 89, Issue 6, Pages 362-369Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500830902950464
Keywords
thermoelectric material; phonon glass; nanoparticles; TEM
Categories
Funding
- Norwegian Research Council
- Caltech MURI program
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We have investigated the thermoelectric material Zn4Sb3 using transmission electron microscopy (TEM). Nanoscale inclusions with a diameter of about 10 nm were observed, constituting on the order of 1% by volume of the material. Studies using energy filtered imaging, electron diffraction, and high-angle annular dark-field STEM indicate that the inclusions consist of Zn. These inclusions are expected to scatter the medium and long-wavelength phonons effectively, thus contributing to phonon glass behavior which results in the exceptionally low thermal conductivity for this thermoelectric material.
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