|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications IV
||Recent Adavnces in Complex Sulphide Materials
||Emmanuel Guilmeau, Cédric Bourgès, Tristan Barbier, Pierric Lemoine, Oleg Lebedev, Ramzy Daou, Vincent Hardy
|On-Site Speaker (Planned)
Improving zT is a challenging approach due to the interdependence of electrical and thermal properties. The number of materials with zT reaching values above the unity remains scarce, especially those using less expensive and earth abundant elements.While maintaining a relatively high power factor, high thermoelectric performance can be expected in finding new compounds with intrinsically low thermal conductivity.This is usually found in complex structures incorporating large atomic weights. Recently, low thermal conductivity was reported in low-cost copper-containing sulfide phases such as tetrahedrite Cu12Sb4S13, colusite Cu26V2Sn6S32 and Cu4Sn7S16 phases. The number of atoms per unit cell associated with large vibration of Cu(2) in triangular/pseudotriangular coordination are as many factors that are likely the origin of low thermal conductivity.In the present work, we report on the synthesis, structural/microstructural characterizations, and transport properties of these very interesting complex structures.We especially address the effect of non-stoichiometry, composition, and process on electrical and thermal properties.
||Planned: A print-only volume