Open AccessHigh-temperature thermoelectric properties of the β-As2−xBixTe3 solid solution
Author(s) -
JeanBaptiste Vaney,
Gaëlle Delaizir,
A. Piarristeguy,
Judith Monnier,
E. Alleno,
Elsa B. Lopes,
A.P. Gonçalves,
A. Pradel,
A. Dauscher,
Christophe Candolfi,
B. Lenoir
Publication year - 2016
Publication title -
apl materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.571
H-Index - 60
ISSN - 2166-532X
DOI - 10.1063/1.4950947
Subject(s) - thermoelectric effect , materials science , seebeck coefficient , thermoelectric materials , solid solution , thermal conductivity , doping , diffraction , x ray crystallography , hot pressing , electrical resistivity and conductivity , scanning electron microscope , analytical chemistry (journal) , condensed matter physics , thermodynamics , metallurgy , optoelectronics , composite material , optics , chemistry , physics , chromatography , quantum mechanics
International audienceBi2Te3-based compounds are a well-known class of outstanding thermoelectric materials. β-As2Te3, another member of this family, exhibits promising thermoelectric properties around 400 K when appropriately doped. Herein, we investigate the high-temperature thermoelectric properties of the β-As2−xBixTe3 solid solution. Powder X-ray diffraction and scanning electron microscopy experiments showed that a solid solution only exists up to x = 0.035. We found that substituting Bi for As has a beneficial influence on the thermopower, which, combined with extremely low thermal conductivity values, results in a maximum ZT value of 0.7 at 423 K for x = 0.017 perpendicular to the pressing direction
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