High thermoelectric cooling performance of n-type Mg3Bi2-based materials

We report n-type magnesium bismuthide (Mg3Bi2)–based materials with a peak figure of merit (ZT) of ~0.9 at 350 kelvin, which is comparable to the commercial bismuth telluride selenide (Bi2Te3–xSex) but much cheaper. A cooling device made of our material and p-type bismuth antimony telluride (Bi0.5Sb1.5Te3) has produced a large temperature difference of ~91 kelvin at the hot-side temperature of 350 kelvin. n-type Mg3Bi2-based materials are promising for thermoelectric cooling applications.

Source: ScienceNOW - July 31, 2019 Category: Science Authors: Mao, J., Zhu, H., Ding, Z., Liu, Z., Gamage, G. A., Chen, G., Ren, Z. Tags: Materials Science reports Source Type: news