[17p-Z17-1~19] 9.4 Thermoelectric conversion

[17p-Z17-15] Preparation of p-Type Ba₈Au₆Ge₄₀ Clathrate and its Thermoelectric Properties

〇(M1)Yudai Koga¹, Kazuya Okamoto¹, Hiroaki Anno¹ (1.Sanyo-Onoda City Univ.)

Keywords:thermoelectric conversion, Ge clathrate, p-type

Most of the clathrate thermoelectric materials are n-type, and the development of p-type materials is an important issue. In this study, Ba₈Au₆Ge₄₀ was prepared as a search for p-type clathrate, and its thermoelectric properties were evaluated. As a result, the Seebeck coefficient, the electrical conductivity, and the power factor of Ba₈Au₆Ge₄₀ at 900 K were 133 μV/K, 823 S/cm, and 14.6 μW/(cmK²), respectively. In the high-temperature region, Ba₈Au₆Ge₄₀ showed higher power factor values than the p-type Ba₈Au_5.3Ge_40.7 of the previous study.