Seebeck coefficient in silicon nanowire arrays

被引：32
|
作者：
Krali, Emiljana [1 ]
Durrani, Zahid A. K. [1 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Elect & Elect Engn, London SW7 2AZ, England
来源：
APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 14期
关键词：
DIMENSIONAL THERMOELECTRIC-MATERIALS; TRANSPORT-PROPERTIES;
D O I：
10.1063/1.4800778
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We measure the Seebeck coefficient S in large arrays of lightly doped n-Si nanowires (SiNWs). Our samples consist of similar to 10(7) NWs in parallel, forming a "bulk" nano-structured material. We find that the phonon drag component of S, a manifestation of electron-phonon scattering in the sample, is heavily suppressed due to surface scattering, and that there is a "universal" temperature dependence for S. Furthermore, at room temperature, S is enhanced in the arrays by up to similar to 3 times in comparison to bulk Si. (C) 2013 American Institute of Physics.
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页数：4
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