Regensburg 2016 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 12: Postersession DS
DS 12.29: Poster
Montag, 7. März 2016, 17:00–19:00, Poster A
Investigation of thermoelectric properties of thin film chalcogenides — •Matteo Cagnoni1 and Matthias Wuttig1,2 — 1Physikalisches Institut (IA), RWTH Aachen University, 52056 Aachen, Germany — 2JARA-FIT, RWTH Aachen University, Germany
Future strategies for energy supply are going to demand an increasing use of renewable, clean and sustainable energy sources. The chance of recycling waste heat through thermoelectric generators and the employment of solid-state Peltier coolers in refrigerators are very attractive. Therefore, the interest of the scientific community into thermoelectric properties of materials has experienced a continuous revival from the 90s, after the proof that high efficiencies can be obtained.
The finding of new high-efficiency thermoelectric materials, characterized by large Seebeck coefficients and high electrical conductivity, and small thermal conductivity, is a very difficult task because of the interplay of a multitude of different physical phenomena that govern thermoelectric behavior. Research driven by physical intuition and trial and error has allowed placing materials classes such as sketterudites and chalcogenides in the Olympus of thermoelectrics.
In this project, the behavior of thin film chalcogenides has been investigated in relation to stoichiometric and structural changes, in order to unravel the link between physical properties and thermoelectric performances.