About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIV
|
| Presentation Title |
Ag<sub>2</sub>S-Based Flexible Thermoelectrics: Balancing Flexibility and Thermoelectrics Performance |
| 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 recently emerged as a promising flexible thermoelectric material, owing to its unusual room-temperature plasticity among inorganic semiconductors. This mechanical flexibility stems from its zig-zag layered structure, multiple slip systems, and dynamic Ag–S bonding, which together enable stress accommodation without fracture. However, its thermoelectric performance is limited by inherently low electrical conductivity despite a high Seebeck coefficient. This study tackles the trade-off between ductility and performance by introducing selenium (Se) doping. Incorporating Se reduces the phase transition temperature and increases carrier concentration, due to the smaller electronegativity difference between Ag–Se compared to Ag–S. Additionally, Se substitution at S sites can introduce anti-site defects, which enhance phonon scattering and consequently lower the lattice thermal conductivity of Ag<sub>2</sub>S<sub>1-x</sub>Se<sub>x</sub>. Thanks to its mechanical compliance, low density, and surface conformability, Se-alloyed Ag<sub>2</sub>S holds strong promise for wearable thermoelectrics and flexible energy harvesting on clothing or skin-mounted platforms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Mechanical Properties, Other |