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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.