About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications X
|
Presentation Title |
Enhanced Thermoelectric Properties in Sb<sub>2</sub>Te<sub>3</sub> Thin Film Modules |
Author(s) |
Zhen-Wei Sun, Albert T. Wu |
On-Site Speaker (Planned) |
Zhen-Wei Sun |
Abstract Scope |
Sb<sub>2</sub>Te<sub>3</sub> is a well-known thermoelectric (TE) material due to its excellent zT values at low temperature region. The transition efficiency drastically reduces when the TE materials are assembled to modules. Cu and Ni were selected as the electrode material. Sb<sub>2</sub>Te<sub>3</sub> has a hexagonal crystal structure that allows fast diffusion along the direction perpendicular to c-axis. In this study, TE module is aged for different duration of time to simulate the operation conditions. For the Cu/Sb<sub>2</sub>Te<sub>3</sub> module, a great amount of Cu diffuses into Sb<sub>2</sub>Te<sub>3</sub> layers and reacts with Sb<sub>2</sub>Te<sub>3</sub>. The formation of CuTe compounds deteriorates TE properties of the modules. Selecting Ni as the electrode enhances TE properties with less formation of Ni-Te compounds in the film. The stoichiometry of the Sb<sub>2</sub>Te<sub>3</sub> greatly affects the TE property. |
Proceedings Inclusion? |
Planned: |
Keywords |
Thin Films and Interfaces, Copper / Nickel / Cobalt, Energy Conversion and Storage |