High-performance flexible p-type Ce-filled Fe3CoSb12 skutterudite thin film for medium-to-high-temperature applications
Dou Li, Xiao‐Lei Shi, Jiaxi Zhu, Tianyi Cao, Xiao Ma, Meng Li, Zhuokun Han, Zhenyu Feng, Yixing Chen, Jianyuan Wang, Wei‐Di Liu, Hong Zhong, Shuangming Li, Zhi‐Gang Chen
Abstract
Abstract P-type Fe 3 CoSb 12 -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 −1 K −2 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 3 CoSb 12 -based flexible device exhibits a power density of 135.7 µW cm −2 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.