|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications IX
||The “Grand Challenge” of Thermoelectric Materials
|On-Site Speaker (Planned)
Despite intensive research, it remains difficult for thermoelectric technology to attain its substantial technological promise.. One main reason is the difficulty of finding sufficiently high performance, based on the “figure-of-merit” ZT. Large ZT requires high electrical conductivity and Seebeck coefficient S and low lattice thermal conductivity. It is easy to meet these requirements separately – there are numerous materials with thermal conductivity as low as 0.4 W/m-K (five times as low as Bii2Te3), and several materials with substantial power factors of a few to several mW/m-K2. It is finding the simultaneous combination of these properties that is a materials science “grand challenge”. I will discuss three relevant scientific questions:
- Does strong anharmonicity necessarily lead to low carrier mobility?
- Can electrical conductivity masses and density-of-states masses be decoupled?
- Can one use inverse design techniques to design a material with extreme band edge degeneracy?
||Computational Materials Science & Engineering, Modeling and Simulation, Sustainability