Development of a novel thermoelectric material with record-high conversion efficiency

NIMS has succeeded in enhancing the thermoelectric performance of an n-type Mg3Sb2-based material by minutely doping with copper. NIMS and AIST then constructed a module by combining this material with a high-performance p-type material, achieving a conversion efficiency of 7.3% between room temperature and 320°C. This performance is comparable to the best Bi2Te3-based modules, champion for more than a half century. Moreover, the high material performance itself indicates possible efficiency of as high as 11%.

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