Enhanced thermoelectric performance in PbTe-based superlattice structures from reduction of lattice thermal conductivity

被引：150

作者：

Caylor, JC ^{[1
]}

Coonley, K ^{[1
]}

Stuart, J ^{[1
]}

Colpitts, T ^{[1
]}

Venkatasubramanian, R ^{[1
]}

机构：

[1] RTI Int, Ctr Thermoelect Res, Res Triangle Pk, NC 27709 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 02期

关键词：

D O I：

10.1063/1.1992662

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have fabricated two-dimensional n-type PbTe/PbTe0.75Se0.25 structures using an evaporation process. In optimized films exhibiting a high-quality superlattice structure, a significant reduction in lattice thermal conductivity has been experimentally measured. The reduction would indicate enhanced thermoelectric device performance compared to standard PbTeSe alloys given that the electrical components, specifically, the Seebeck coefficient and electrical resistivity, were not observed to deteriorate from bulk values. The analysis of these films shows continuous layers with a true two-dimensional superlattice structure, as opposed to the PbTe/PbSe system that exhibits zero-dimensional structures from self-assembly. The room-temperature measurement of cross-plane figure-of-merit in a n-type PbTe/PbTe0.75Se0.25 device structure by the transient method has been combined with temperature-dependent measurements of in-plane resistivity and Seebeck coefficient to yield evidence of enhanced thermoelectric performance. The similarities and differences between the superlattice in the PbTe/PbTe0.75Se0.25 system and the Bi2Te3/Sb2Te3 material system are presented. (c) 2005 American Institute of Physics.

引用

页数：3

共 13 条

[1] PbTe based superlattice structures with high thermoelectric efficiency [J].

Beyer, H ;

Nurnus, J ;

Böttner, H ;

Lambrecht, A ;

Roch, T ;

Bauer, G .

APPLIED PHYSICS LETTERS, 2002, 80 (07) :1216-1218

[2] THERMAL-DIFFUSIVITY MEASUREMENT OF GAAS/ALGAAS THIN-FILM STRUCTURES [J].

CHEN, G ;

TIEN, CL ;

WU, X ;

SMITH, JS .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1994, 116 (02) :325-331

[3] X-ray diffraction investigation of diffusion in PbTe-PbSe superlattices [J].

Fedorov, AG ;

Shneiderman, IA ;

Sipatov, AY ;

Kaidalova, EV .

JOURNAL OF CRYSTAL GROWTH, 1999, 198 :1211-1215

[4]

Harman T. C., 1999, Eighteenth International Conference on Thermoelectrics. Proceedings, ICT'99 (Cat. No.99TH8407), P280, DOI 10.1109/ICT.1999.843386

[5] Quantum dot superlattice thermoelectric materials and devices [J].

Harman, TC ;

Taylor, PJ ;

Walsh, MP ;

LaForge, BE .

SCIENCE, 2002, 297 (5590) :2229-2232

[6] Cubic AgPbmSbTe2+m:: Bulk thermoelectric materials with high figure of merit [J].

Hsu, KF ;

Loo, S ;

Guo, F ;

Chen, W ;

Dyck, JS ;

Uher, C ;

Hogan, T ;

Polychroniadis, EK ;

Kanatzidis, MG .

SCIENCE, 2004, 303 (5659) :818-821

[7] Thermal conductivity of Si-Ge superlattices [J].

Lee, SM ;

Cahill, DG ;

Venkatasubramanian, R .

APPLIED PHYSICS LETTERS, 1997, 70 (22) :2957-2959

[8]

NOLAS GS, 2003, THERMOELECTRIC MAT 2, V793

[9] Direct formation of self-assembled quantum dots under tensile strain by heteroepitaxy of PbSe on PbTe (111) [J].

Pinczolits, M ;

Springholz, G ;

Bauer, G .

APPLIED PHYSICS LETTERS, 1998, 73 (02) :250-252

[10]

Van der Pauw L. J., 1958, PHILIPS RES REP, V13, P1, DOI 10.1142/9789814503464_0017

← 1 2 →