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- ItemTemperature dependence of the Seebeck coefficient of epitaxial β -Ga2O3 thin films(Melville, NY : AIP Publ., 2019) Boy, Johannes; Handwerg, Martin; Ahrling, Robin; Mitdank, Rüdiger; Wagner, Günter; Galazka, Zbigniew; Fischer, Saskia F.The temperature dependence of the Seebeck coefficient of homoepitaxial metal organic vapor phase grown, silicon doped β-Ga 2 O 3 thin films was measured relative to aluminum. For room temperature, we found the relative Seebeck coefficient of Sβ-Ga2O3-Al=(-300±20) μV/K. At high bath temperatures T > 240 K, the scattering is determined by electron-phonon-interaction. At lower bath temperatures between T = 100 K and T = 300 K, an increase in the magnitude of the Seebeck coefficient is explained in the frame of Stratton's formula. The influence of different scattering mechanisms on the magnitude of the Seebeck coefficient is discussed and compared with Hall measurement results. © 2019 Author(s).
- ItemMessanlage zur Untersuchung des Seebeck-Effektes in Polymermaterialien(Berlin : De Gruyter, 2020) Jenschke, Wolfgang; Ullrich, Mathias; Krause, Beate; Pötschke, PetraThe thermoelectric effect named after the physicist Thomas Johann Seebeck has been investigated sufficiently well for all technically relevant metals and has been used for a long time, among other things, for temperature measurement by means of thermocouples. Less well known and researched is the Seebeck effect in polymer materials, which are gaining increasing influence in the sensor industry today. This article describes a measuring system designed specifically to study the Seebeck effect in polymeric samples with the aim of developing tailored polymers for sensory engineering applications using the Seebeck effect. The special requirement of the measuring system is the realization of constant accurate temperature sources.