PbTe based superlattice structures with high thermoelectric efficiency

被引：115

作者：

Beyer, H

Nurnus, J

Böttner, H

Lambrecht, A

Roch, T

Bauer, G

机构：

[1] Fraunhofer Inst Phys Messtech, D-79110 Freiburg, Germany

[2] Johannes Kepler Univ Linz, Inst Halbleiterphys, A-4040 Linz, Austria

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 07期

关键词：

D O I：

10.1063/1.1448388

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on an enhanced thermoelectric figure of merit ZT=sigmaS(2)T/lambda (where sigma is electrical conductivity, S is thermopower, T is absolute temperature, and lambda is thermal conductivity) for PbTe/PbSe0.20Te0.80 superlattices (SLs) and PbTe doping SLs due to a reduction of the thermal conductivity lambda parallel to the layer planes. Despite a small decrease of the power factors sigmaS(2) due to a reduction of sigma in these superlattices, the figure of merit is higher as compared to the corresponding bulk materials and reaches maximum values in the temperature range between 400 and 570 K. (C) 2002 American Institute of Physics.

引用

页码：1216 / 1218

页数：3

共 21 条

[1] Significant decrease of the lattice thermal conductivity due to phonon confinement in a free-standing semiconductor quantum well [J].