About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
2026 Graduate Student Poster Contest
|
| Presentation Title |
SPG-9: Boosting Power Factor via Self-Exsolved Metallic Nanonetworks in SrTiO3-Based Thermoelectric Thin Films |
| Author(s) |
Chang Liu, Yuan-Hua Lin |
| On-Site Speaker (Planned) |
Chang Liu |
| Abstract Scope |
Perovskite oxide SrTiO3 shows high Seebeck coefficient and stability but limited power factor (PF). We use exsolution to self-assemble metallic nanonetworks in La-doped SrTiO3 epitaxial thin films on LSAT (001) substrates. By tuning exsolution conditions, we achieve dense, uniformly distributed nanonetworks with strong interfacial bonding, greatly enhancing conductivity. This yields a peak PF of ~1352 μW m−1 K−2 at 528 K and an average PF of ~1106 μW m−1 K−2 from RT to 886 K—highly competitive among n-type oxide thermoelectrics. Interface engineering further optimizes overall thermoelectric performance. This work demonstrates exsolution as a powerful route for nano-composite engineering in perovskite oxides, guiding high-performance thermoelectric thin-film design. |