|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications VI
||Room Temperature Orientation-dependent Thermal Conductivity of Thermoelectric SnSe
||Yi Li, Bin He, Joseph P. Heremans, Ji-Cheng Zhao
|On-Site Speaker (Planned)
SnSe has been reported to exhibit an unprecedented high ZT value along its b axis at high temperatures. This high ZT value is attributed to the extra low thermal conductivity as a result of anisotropic Sn-Se atomic bonding. There have been significant discrepancies in the thermal conductivity values of SnSe reported from several groups. These thermal conductivities are measured using the laser flash diffusivity method using bulk samples. Here, we present a localized thermal conductivity measurement based on time-domain thermoreflectance using an ultra-fast laser. In combination with electron backscatter diffraction measurement, orientation-dependent thermal conductivity can be measured on polycrystalline SnSe. From the orientation-dependent thermal conductivity values of several grains, the three primary thermal conductivities along the a, b, c axes can be evaluated. Comparison between literature results and our measurement will be presented.
||Planned: Supplemental Proceedings volume