Regensburg 2016 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 12: Postersession DS
DS 12.33: Poster
Montag, 7. März 2016, 17:00–19:00, Poster A
In-plane thermal conductivity of thin films measured by steady-state infrared thermography — •Anton Greppmair1, Caroline Gerstberger1, Benedikt Stoib1, Nitin Saxena2, Peter Müller-Buschbaum2, Martin Stutzmann1, and Martin S. Brandt1 — 1Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany — 2Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München, James-Franck-Strasse 1, 85748 Garching, Germany
We demonstrate a simple and quick method for the measurement of the in-plane thermal conductance of thin films via steady-state IR thermography. The films are suspended above a hole in an opaque substrate and heated by a homogeneous visible light source. The temperature distribution of the thin films is captured via infrared microscopy and fitted to the analytical expression obtained for the specific hole geometry in order to obtain the in-plane thermal conductivity. For thin films of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate post-treated with ethylene glycol and of polyimide we find conductivities of 1.0 W/(m K) and 0.3 W/(m K) at room temperature, respectively. These results are in very good agreement with literature values, validating the method developed.