Field-Assisted and Thermionic Contributions to Conductance in SnO𝟐 Thick-Films
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. The model has been applied to explain the behavior of resistance in vacuum of two sets of nanostructured th...
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doaj-3fc945e0fe7c4e82a7bec4e0c1c309312020-11-25T01:00:37ZengHindawi LimitedJournal of Sensors1687-725X1687-72682009-01-01200910.1155/2009/402527402527Field-Assisted and Thermionic Contributions to Conductance in SnO𝟐 Thick-FilmsC. Malagù0M. C. Carotta1G. Martinelli2M. A. Ponce3M. S. Castro4C. M. Aldao5Department of Physics, University of Ferrara, Via Saragat 1/C, 44100 Ferrara, ItalyDepartment of Physics, University of Ferrara, Via Saragat 1/C, 44100 Ferrara, ItalyDepartment of Physics, University of Ferrara, Via Saragat 1/C, 44100 Ferrara, ItalyInstitute of Materials Science and Technology (INTEMA), National University of Mar del Plata, CONICET, Juan B. Justo 4302, B7608FDQ Mar del Plata, ArgentinaInstitute of Materials Science and Technology (INTEMA), National University of Mar del Plata, CONICET, Juan B. Justo 4302, B7608FDQ Mar del Plata, ArgentinaInstitute of Materials Science and Technology (INTEMA), National University of Mar del Plata, CONICET, Juan B. Justo 4302, B7608FDQ Mar del Plata, ArgentinaA 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. The model 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=25 nm 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.http://dx.doi.org/10.1155/2009/402527 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
C. Malagù M. C. Carotta G. Martinelli M. A. Ponce M. S. Castro C. M. Aldao |
spellingShingle |
C. Malagù M. C. Carotta G. Martinelli M. A. Ponce M. S. Castro C. M. Aldao Field-Assisted and Thermionic Contributions to Conductance in SnO𝟐 Thick-Films Journal of Sensors |
author_facet |
C. Malagù M. C. Carotta G. Martinelli M. A. Ponce M. S. Castro C. M. Aldao |
author_sort |
C. Malagù |
title |
Field-Assisted and Thermionic Contributions to Conductance in SnO𝟐 Thick-Films |
title_short |
Field-Assisted and Thermionic Contributions to Conductance in SnO𝟐 Thick-Films |
title_full |
Field-Assisted and Thermionic Contributions to Conductance in SnO𝟐 Thick-Films |
title_fullStr |
Field-Assisted and Thermionic Contributions to Conductance in SnO𝟐 Thick-Films |
title_full_unstemmed |
Field-Assisted and Thermionic Contributions to Conductance in SnO𝟐 Thick-Films |
title_sort |
field-assisted and thermionic contributions to conductance in sno𝟐 thick-films |
publisher |
Hindawi Limited |
series |
Journal of Sensors |
issn |
1687-725X 1687-7268 |
publishDate |
2009-01-01 |
description |
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. The model 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=25 nm 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. |
url |
http://dx.doi.org/10.1155/2009/402527 |
work_keys_str_mv |
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1725212898525970432 |