Isotropic Conduction Network and Defect Chemistry in Mg<sub>3+</sub><sub>δ</sub> Sb<sub>2</sub> -Based Layered Zintl Compounds with High Thermoelectric Performance.
basic_science · Level V
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- Record sourced from PubMed, PMID 27690372.
- Also identified by DOI 10.1002/adma.201603955.
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Abstract
Thermoelectric performance in the layered Zintl phase n-type Mg<sub>3+</sub><sub>δ</sub> (Sb,Bi)<sub>2</sub> is reported. Insertion of the excess Mg into the compounds is crucial for realizing n-type carrier transport with multivalley and isotropic character. An excellent ZT of 1.51 ± 0.06 at 716 K is achieved in the sintered polycrystals at the composition of Mg<sub>3.2</sub> Sb<sub>1.5</sub> Bi<sub>0.49</sub> Te<sub>0.01</sub> .