Thermoelectric quantum-dot superlattices with high ZT

被引：255

作者：

Harman, TC ^{[1
]}

Taylor, PJ ^{[1
]}

Spears, DL ^{[1
]}

Walsh, MP ^{[1
]}

机构：

[1] MIT, Lincoln Lab, Lexington, MA 02420 USA

来源：

JOURNAL OF ELECTRONIC MATERIALS | 2000年 / 29卷 / 01期

关键词：

PbSeTe/PbTe; quantum-dots; thermoelectric figure of merit (ZT);

D O I：

10.1007/s11664-000-0117-1

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Following the experimentally observed Seebeck coefficient enhancement in PbTe quantum wells in Pb(1-x)Eu(x)Te/PbTe multiple-quantum-well structures which indicated the potential usefulness of low dimensionality, we have investigated the thermoelectric properties of PbSe(x)Te(1-x)/PbTe quantum-dot superlattices for possible improved thermoelectric materials. We have again found enhancements in Seebeck coefficient and thermoelectric figure of merit (ZT) relative to bulk values, which occur through the various physics and materials science phenomena associated with the quantum-dot structures. To date, we have obtained estimated ZT values approximately double the best bulk PbTe values, with estimated ZT as high as about 0.9 at 300 K.

引用

页码：L1 / L4

页数：4

共 28 条

[1] Anisotropic thermal conductivity of a Si Ge superlattice [J].