[15a-E206-1~12] 9.4 Thermoelectric conversion

[15a-E206-1] [JSAP Young Scientist Award Speech] Defect chemistry and isotropic conduction network in thermoelectric Zintl-phase Mg₃Sb₂ with n-type character

〇Hiromasa Tamaki¹, Hiroki Sato¹, Tsutomu Kanno¹ (1.Panasonic Corp.)

Keywords:thermoelectric, zintl phase, defect

We succeeded in synthesizing high-performance and low-cost thermoelectric material in the n-type Mg₃Sb₂ (ZT = 1.51 at T = 716K for the composition of Mg_3.2Sb_1.5Bi_0.49Te_0.01) by computational screening and chemical optimization. In this talk, we reveal desigining principle of the n-type Mg₃Sb₂ with high thermoelectric performance by focusing on defect formation mechanism and isotropic conduction character in spite of the layered crystal structure.