Structural influences in thermoelectric materials

Conference Dates

September 4-8, 2016


Thermoelectric properties such as thermopower, electronic and thermal conductivity are governed by the underlying bonding interactions and local structural arrangements. This presentation will provide examples on how changing the local structural situation in materials affects thermoelectric transport directly. For instance, in the quaternary Cu2MGeQ4 (M = Zn, Fe; Q = S, Se), the local bonding situation on the one hand leads to moving valence and conduction bands as well as enhanced point defect scattering on the other hand. Further examples include materials such as Yb1-xZn2Sb2 and CoSb3. Understanding the underlying structure, defect chemistry, and temperature dependent structural changes helps to understand effects such as doping efficiencies and apparent band convergence.

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