Thermoelectric figure of merit of anisotropic bulk materials in the presence of polar optical phonon scattering

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Department of Applied Physics and Physico-Informatics, Keio University, Yokohama 223-8522, Japan [1 ]
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Japanese Journal of Applied Physics | 2008年 / 47卷 / 4 PART 1期
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The effect of mass anisotropy on the thermoelectric figure of merit in the presence of polar optical phonon (POP) scattering is numerically studied. Electron transport is considered using the linear Boltzmann transport equation. The mass anisotropy is advantageous for the figure of merit along the principal directions of a small effective mass if phonon thermal conductivity is large. Inelasticity plays an essential role in the obtained result. The result is qualitatively different from that for an ionised impurity model. © 2008 The Japan Society of Applied Physics;
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页码：2189 / 2191
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