Isotropic Conduction Network and Defect Chemistry in Mg3+δSb2-Based Layered Zintl Compounds with High Thermoelectric Performance
Isotropic Conduction Network and Defect Chemistry in Mg3+δSb2-Based Layered Zintl Compounds with High Thermoelectric Performance
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DOI：
10.1002/adma.201603955
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发表时间：
2016-12-14
影响因子：
29.4
通讯作者：
Kanno, Tsutomu
中科院分区：
文献类型：
--
作者：
Tamaki, Hiromasa;Sato, Hiroki K.;Kanno, Tsutomu
报道了层状Zintl相n型Mg3+Delta(Sb，Bi)(2)的热电性能。在化合物中插入过量的镁是实现多谷各向同性n型载流子输运的关键。在716K下，当成分为Mg3.2Sb1.5Bi0.49Te0.01时，烧结多晶的ZT达到了1.51+/-0.06。
Thermoelectric performance in the layered Zintl phase n-type Mg3+delta(Sb,Bi)(2) 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 Mg3.2Sb1.5Bi0.49Te0.01.