About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIV
|
| Presentation Title |
B-15: Tuning Ductility and Thermoelectric Performance of Ag<sub>2</sub>(S,Se) for Flexible Wearable Devices |
| Author(s) |
Shang-Zhe Yu, Hsin-Jay Wu |
| On-Site Speaker (Planned) |
Shang-Zhe Yu |
| Abstract Scope |
Silver sulfide (Ag<sub>2</sub>S) has emerged as a promising flexible thermoelectric material, owing to its exceptional room-temperature plasticity among inorganic semiconductors. Due to its zig-zag layered structure, multiple slip systems, and dynamic Ag–S bonding, α-Ag<sub>2</sub>S can accommodate stress without fracture. However, its low conductivity limits thermoelectric performance despite a high Seebeck coefficient. This study focuses on the trade-off between ductility and performance by introducing selenium (Se) doping. Se incorporation lowers the phase transition temperature and raises carrier concentration because of its lower electronegativity difference with Ag. Additionally, anti-site defects from Se doping enhance phonon scattering and consequently suppress lattice thermal conductivity. Furthermore, we constructed an Ag–S–Se ternary phase diagram at 623 K to define the phase boundary of Ag<sub>2</sub>(S,Se), aiming to clarify the solid solution range. Thanks to its mechanical compliance, low density, and surface conformability, Ag<sub>2</sub>(S,Se) holds strong potential for wearable thermoelectrics and flexible energy harvesting applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Mechanical Properties, Other |