[21p-C102-1~17] 9.4 Thermoelectric conversion

△ [21p-C102-8] Thermoelectric properties of 143 Zintl phase compounds RbZn₄As₃

〇(M2)Keigo Ono^1,2, Kunihiro Kihou¹, Ryosuke Sakagami¹, Tsutomu Iida², Chul-Ho Lee¹ (1.AIST, 2.Tokyo Univ. of Sci.)

Keywords:Thermoelectric materials, Zintl phase compounds, energy harvesting

We studied thermoelectric properties of RbZn₄As₃. Crystal structure of 143 Zintl compounds is closed to 122 Zintl compounds that exhibit low thermal conductivity. In addition, they consist of double conducting layers, which could lead to improving electric mobility in 122 compounds. In this study, we substituted Zn with Cu for enhancing thermoelectric properties by optimizing carrier concentration. As results, we found ZT value of 0.53 around 800 K.