High-performance flexible p-type Ce-filled Fe<sub>3</sub>CoSb<sub>12</sub> skutterudite thin film for medium-to-high-temperature applications.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38762562.
- Also identified by DOI 10.1038/s41467-024-48677-4 and PMC identifier 11102547.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
P-type Fe<sub>3</sub>CoSb<sub>12</sub>-based skutterudite thin films are successfully fabricated, exhibiting high thermoelectric performance, stability, and flexibility at medium-to-high temperatures, based on preparing custom target materials and employing advanced pulsed laser deposition techniques to address the bonding challenge between the thin films and high-temperature flexible polyimide substrates. Through the optimization of fabrication processing and nominal doping concentration of Ce, the thin films show a power factor of >100 μW m<sup>-1</sup> K<sup>-2</sup> and a ZT close to 0.6 at 653 K. After >2000 bending cycle tests at a radius of 4 mm, only a 6 % change in resistivity can be observed. Additionally, the assembled p-type Fe<sub>3</sub>CoSb<sub>12</sub>-based flexible device exhibits a power density of 135.7 µW cm<sup>-2</sup> under a temperature difference of 100 K with the hot side at 623 K. This work fills a gap in the realization of flexible thermoelectric devices in the medium-to-high-temperature range and holds significant practical application value.