Structural and thermoelectric properties of FeSb₃ skutterudite thin films
Daniel, Marcus V. and Hammerschmidt, Lukas and Schmidt, Constanze and Timmermann, Felix and Franke, Jonny and Jöhrmann, Nathanael and Hietschold, Michael and Johnson, Dave C. and Paulus, Beate and Albrecht, Manfred – 2015
Skutterudites are promising materials for future thermoelectric applications. Whereas the skutterudite CoSb3 is intensively studied, very few investigations for FeSb3 are performed due to its metastable character and the comparably low decomposition temperature. In this work, single-phase FeSb3 thin films were prepared by codeposition of Fe and Sb using molecular beam epitaxy at room temperature followed by postannealing. The transport properties of a Fe-Sb composition series were determined and reveal high power factors S2σ up to 14μW/K2cm. Furthermore, the structural parameters, the electronic structure, and the transport parameters were calculated by density functional theory, giving excellent agreement with the experimental data.