Artículo
Field-Assisted and Thermionic Contributions to Conductance in SnO2 Thick-Films
Malagú, C.; Carotta, M. Cristina; Martinelli, Giuliano; Ponce, Miguel Adolfo
; Castro, Miriam Susana
; Aldao, Celso Manuel
Fecha de publicación:
07/2009
Editorial:
Hindawi Publishing Corporation
Revista:
Journal of Sensors
ISSN:
1687-7268
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A deep analysis of conductance in nanostructured SnO2 thick films has been performed. A model for field-assisted thermionic barrier crossing is being proposed to explain the film conductivity. Themodel has been applied to explain the behavior of resistance in vacuum of two sets of nanostructured thick-films with grains having two well-distinct characteristic radii (R = 25nm and R = 125 nm). In the first case the grain radius is shorter than the depletion region width, a limit at which overlapping of barriers takes place, and in the second case it is longer. The behavior of resistance in the presence of dry air has been explained through the mechanism of barrier modulation through gas chemisorption.
Palabras clave:
Gas Sensors
,
Tin Oxide
,
Field Assisted Conduction
,
Semiconductors
Archivos asociados
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Identificadores
Colecciones
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Malagú, C.; Carotta, M. Cristina; Martinelli, Giuliano; Ponce, Miguel Adolfo; Castro, Miriam Susana; et al.; Field-Assisted and Thermionic Contributions to Conductance in SnO2 Thick-Films; Hindawi Publishing Corporation; Journal of Sensors; 2009; 7-2009; 1-6
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