Theoretical study on geometry and temperature effects of thermoelectric properties of Si and Ge nanowires
Huang, W. Koong, C.S. Liang, G.
Huang, W.
Koong, C.S.
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Abstract
Thermoelectric properties of Si and Ge nanowires are studied theoretically using sp3d5s* tight-binding and ballistic transport approach. We found that the Seebeck coefficient and power factor per area depend on the nanowire size and its orientation. In addition, for nano-scale nanowires, cross-sectional shape effect is considerable and transmission mode dominates the performance. Temperature also has a great impact on the thermoelectric performance of nanowires. The power factor of Si nanowires along different orientations is approaching to the same value as temperature growing higher than 300 K; while power factor of Ge nanowires along [100] is the largest at high temperature, but the smallest at extreme low temperature. ©2010 IEEE.
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ICSICT-2010 - 2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology, Proceedings
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Date
2010
DOI
10.1109/ICSICT.2010.5667699
Type
Conference Paper