Dresden 2009 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 26: Poster II
DS 26.30: Poster
Mittwoch, 25. März 2009, 09:30–12:30, P5
Seebeck and Hall measurements on p- and n-TCOs — •Wilma Dewald1, Christina Polenzky1, Volker Sittinger1, and Stefan Götzendörfer2 — 1Fraunhofer IST, Bienroder Weg 54E, 38108 Braunschweig, Germany — 2Fraunhofer ISC, Neunerplatz 2, 97082 Würzburg, Germany
For development in the field of transparent electronics, it is necessary to synthesize transparent n- and p-conducting materials. Possible applications are transparent diodes or transparent solar cells in the future.
To characterize the thin films, we started to build up a four-coefficent-setup after Young et al. for determining the conductivity, mobility, effective mass and carrier density in semiconductors by measuring conductivity, Hall, Seebeck, and Nernst-Ettinghausen effect. Furthermore, it is possible to determine the major conducting species of the thin films for classification in p- and n-TCO.
With this poster, we present our current four-coefficent-setup including temperature-dependent Seebeck and Hall measurements on p-conducting delafossites and n-conducting ZnO:Al that were synthesized by different deposition methods like sol-gel and magnetron sputtering. The measurements show dependencies of the Hall and Seebeck coefficients on process parameters and doping.