[15p-K310-1~9] 15.5 Group IV crystals and alloys

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[15p-K310-1] Synthesis of polycrystalline thin film of Mg-IV alloy compounds for thermoelectric applications

〇Takenori Nakajima¹, Takamitsu Ishiyama¹, Shintaro Maeda¹, Takashi Suemasu¹, Kaoru Toko¹ (1.Univ. of Tsukuba)

Keywords:

thermoelectric conversion,Polycrystalline thin film

The narrow-gap semiconductor Mg₂X (X = Si, Ge, Sn) has long attracted attention as an environmentally benign thermoelectric material with a relatively large Seebeck coefficient S at room temperature. However, their high thermal conductivity κ has been a bottleneck in improving thermoelectric properties. We have reduced κ by using group IV mixed-crystalline GeSiSn thin films and demonstrated high thermoelectric properties. In the present study, we have conducted research with the ultimate goal of synthesizing Mg₂(SiGeSn) and demonstrating its thermoelectric properties.