|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications VI
||K-11: The Phase Diagram of Ge-Te-Sb and Enhanced Thermoelectric Properties of (Sb, In)-doped GeTe
||Yi-Fen Tsai, Hsin-Jay Wu, Jie-Ru Deng
|On-Site Speaker (Planned)
Thermoelectric (TE) generator, which is capable of converting the undesired waste heat into the precious electricity. Cubic GeTe featured with high electrical and thermal conductivity is targeted in this study, and the thermal/electrical transport properties are tuned by the fluctuations in mass and phase region, with respect to the changing Sb/In doping amounts. In addition, alloy (In2Te3)0.025(GeTe)2.925 reaches the highest peak value of zT~1.12 at 623K. On the basis of TEM analysis, the nano-sized twinning structure was discovered, which leading to the reduced thermal conductivity and enhanced electrical conductivity. The information of phase stability, microstructures and thermodynamic behaviors are illustrated by the isothermal section and liqiudus projection of ternary Ge-Te-Sb system, on the basis of the thermally-equilibrated or the as-quenched alloys. Several series of Sb-incorporated GeTe are grown by the Bridgman method, and the thermoelectric transport properties are found to be correlated strongly with the starting compositions and secondary phases.
||Planned: Supplemental Proceedings volume