Literatur vom gleichen Autor/der gleichen Autor*in
plus bei Google Scholar

Bibliografische Daten exportieren
 

Morphology dependence of thermopower and conductance in semiconducting oxides with space charge regions

Titelangaben

Rettig, Frank ; Moos, Ralf:
Morphology dependence of thermopower and conductance in semiconducting oxides with space charge regions.
In: Solid State Ionics. Bd. 179 (2008) Heft 39 . - S. 2299-2307.
ISSN 0167-2738
DOI: https://doi.org/10.1016/j.ssi.2008.08.006

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

The mechanism of the gas concentration dependent conductivity of semiconducting metal oxides is often described by one-dimensional analytic models. The thermopower of materials with space charge regions is mostly not taken into account. Here, a numerical method is presented that allows to calculate the effective thermopower and effective resistance of semiconducting gas sensitive oxides with space charge regions. This involves both the numerical solution of the nonlinear Poisson–Boltzmann equation leading to a potential distribution and two potential equations for the calculation of the electrical conductivity and the thermovoltage. Varied morphological parameters were the grain sizes and the neck radii. The results were plotted in the form of Jonker diagrams and compared with homogeneous metal oxides. Intrinsic materials and slightly donor-doped materials turned out to be ideal candidates for direct thermoelectric gas sensors. First tests with Fe2O3 as an intrinsic material confirmed this assumption.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien
Profilfelder > Advanced Fields > Neue Materialien
Forschungseinrichtungen > Forschungszentren > Bayreuther Materialzentrum - BayMAT
Profilfelder
Profilfelder > Advanced Fields
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 21 Jan 2015 11:35
Letzte Änderung: 06 Apr 2016 09:11
URI: https://eref.uni-bayreuth.de/id/eprint/5721