Dresden 2011 – scientific programme
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DS: Fachverband Dünne Schichten
DS 43: Poster II: Thin Film Chalcogenide Photovoltaics; Thermoelectric Materials, Thin Films, and Nanostructures
DS 43.3: Poster
Wednesday, March 16, 2011, 15:00–17:30, P2
Modeling the Thermal Conductance of Silicon Phononic Crystal Plates — •Stefanie Thiem1 and Joel Moore2 — 1Institut für Physik, Technische Universität Chemnitz, D-09107 Chemnitz, Germany — 2Department of Physics, University of California, Berkeley, CA 94720, USA
Silicon phononic crystal plates with void pores have been found to posses enhanced figures of merit ZT, which make them potentially interesting for the construction of thermoelectric devices. We developed a method to compute the phonon thermal conductivity for these materials using the Landauer formula. This requires the calculation of the complete dispersion relation for the holey silicon plates. Thereby, we determine the elastic band structure by a plane-wave expansion method with a supercell approach.