Enhanced thermoelectric performance in the very low thermal conductivity Ag2Se0.5Te0.5

被引：47

作者：

Drymiotis, Fivos ^{[1
]}

Day, Tristan W. ^{[1
]}

Brown, David R. ^{[1
]}

Heinz, Nicholas A. ^{[1
]}

Snyder, G. Jeffrey ^{[1
]}

机构：

[1] CALTECH, Dept Mat Sci, Pasadena, CA 91125 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 14期

关键词：

SILVER SELENIDE; TELLURIDE; ALPHA-AG2TE; BETA-AG2TE; TRANSPORT; FIGURE; SYSTEM; MERIT; AG;

D O I：

10.1063/1.4824353

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this letter, we report the high-temperature thermoelectric properties of Ag2Se0.5Te0.5. We find that this particular composition displays very low thermal conductivity and competitive thermoelectric performance. Specifically, in the temperature region 520K <= T <= 620 K, we observe non-hysteretic behavior between the heating and cooling curves and zT values ranging from 1.2 to 0.8. Higher zT values are observed at lower temperatures on cooling. Our results suggest that this alloy is conducive to high thermoelectric performance in the intermediate temperature range, and thus deserves further investigation. (C) 2013 AIP Publishing LLC.

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页数：4

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