Giant thermopower and figure of merit in single-molecule devices

被引：248

作者：

Finch, C. M. ^{[1
]}

Garcia-Suarez, V. M. ^{[1
]}

Lambert, C. J. ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

electrochemical electrodes; electron spin polarisation; Fermi level; gold; molecular electronics; organic compounds; photoemission; thermoelectric power; THERMOELECTRIC TRANSPORT-PROPERTIES; JUNCTIONS;

D O I：

10.1103/PhysRevB.79.033405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a study of the thermopower S and the dimensionless figure of merit ZT in molecules sandwiched between gold electrodes. We show that for molecules with side groups, the shape of the transmission coefficient can be dramatically modified by Fano resonances near the Fermi energy, which can be tuned to produce huge increases in S and ZT. This shows that molecules exhibiting Fano resonances have a high efficiency of thermoelectric cooling which is not present for conventional ungated molecules with only delocalized states along their backbone.

引用

页数：4

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