Bi1-xSrxCuSeO oxyselenides as promising thermoelectric materials

被引：384

作者：

Zhao, L. D. ^{[1
,3
]}

Berardan, D. ^{[1
,3
]}

Pei, Y. L. ^{[2
]}

Byl, C. ^{[1
,3
]}

Pinsard-Gaudart, L. ^{[1
,3
]}

Dragoe, N. ^{[1
,3
]}

机构：

[1] Univ Paris 11, Inst Chim Mol & Mat Orsay, UMR 8182, F-91405 Orsay, France

[2] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

[3] CNRS, F-91405 Orsay, France

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 09期

关键词：

CERAMICS; MERIT;

D O I：

10.1063/1.3485050

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

p-type BiCuSeO, a layered oxyselenide composed of conductive (Cu2Se2)(2-) layers alternately stacked with insulating (Bi2O2)(2+) layers, shows an enhancement of the electrical conductivity after substituting Bi3+ by Sr2+, from 470 S m(-1) (BiCuSeO) to 4.8 x 10(4) S m(-1) (Bi0.85Sr0.15CuSeO) at 293 K. Coupled to high Seebeck coefficients, this leads to promising values of the thermoelectric power factor that exceeds 500 mu W m(-1) K-2 at 873 K. Moreover, the thermal conductivity of these layered compounds is lower than 1 W m(-1) K-1 at 873 K. Maximum ZT values reach 0.76 at 873 K, making this family promising for thermoelectric applications in the medium temperature range. (C) 2010 American Institute of Physics. [doi:10.1063/1.3485050]

引用

页数：3

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