|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications VI
||Optimization of Thermoelectric Performance for SnTe Alloys and Simulation of the TEG Module with Single SnTe Legs
||Hongchao Wang, Teng Wang, Xue Wang, Wenbin Su, Woochul Kim, Chunlei Wang
|On-Site Speaker (Planned)
We demonstrate that the synergistic effect of band structure modification and chemical bond softening can be realized simultaneously in In & Mn co-doped SnTe bulk alloys. The Seebeck coefficient and power factor are synergistically improved, owing to the around factor five times increase in the band effective mass. The force constant of the bonds around the Te site is decreased, indicating that the chemical bonds are softened, which lead to low sound velocity and lower lattice thermal conductivity. So peak figure of merit, zT=1.03 has been achieved. Following experimental data of SnTe, the effect of coated metal powder on contact resistance, out power and efficiency for TEG module with single SnTe legs has been simulated. It is found that the silver powder is the best coated metal powder for SnTe module. Thus, the lowest contact resistance, 5 mΩ, out power, 72.2 mW and efficiency, 1.71 % are achieved with ΔT=600K.
||Planned: Supplemental Proceedings volume