About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications X
|
Presentation Title |
Enhancing Room-temperature Thermoelectric Performance of SnSe with Excess Ag |
Author(s) |
Hsin-Jay Wu, Meng-Yuan Ho |
On-Site Speaker (Planned) |
Hsin-Jay Wu |
Abstract Scope |
Single-crystalline SnSe attracts attention owing to its high peak ZT > 2.5 at 923 K as measuring along with the b-axis and c-axis directions. In contrast, the poly-crystalline SnSe reveals a lower zT value but with a feasible synthesis procedure. The difference in the TE performance is attributed to the anisotropy and phase transition behavior in SnSe. This study aims to improve the TE performance of the low-temperature Pnma phase of SnSe by incorporating dilute amounts of In, Cu, and Ag into the single- and poly-crystalline SnSe substrates. Along with the Ag-excess condition, the room-temperature zT values of In-SnSe and Cu-SnSn crystals are greatly enhanced from 0.001 to 0.06 and from 0.001 to 0.03, respectively, showing nearly 30 to 60 times higher compared with their bare samples. This study uncovers the importance of phase diagram engineering and suggests that the electrical current sintering boosts the zT values for SnSe-based alloys. |
Proceedings Inclusion? |
Planned: |