Isotropic Conduction Network and Defect Chemistry in Mg3+δSb2-Based Layered Zintl Compounds with High Thermoelectric Performance.
Thermoelectric performance in the layered Zintl phase n-type Mg3+δ(Sb,Bi)2is 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 Mg3.2Sb1.5Bi0.49Te0.01.
Advanced Research Division, Panasonic Corporation, 3-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto, 619-0237, Japan.
Hiromasa
H
Tamaki
Advanced Research Division, Panasonic Corporation, 3-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto, 619-0237, Japan.
Hiroki K
HK
Sato
Advanced Research Division, Panasonic Corporation, 3-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto, 619-0237, Japan.
Tsutomu
T
Kanno
Zintl phases; alloy scattering; defects; layered materials; thermoelectrics