Conductivity in SnO2 polycrystalline thick film gas sensors: Tunneling electron transport and oxygen diffusion

Conduction mechanisms in polycrystalline SnO2 thick sensing films were investigated by means of DC electrical resistance during heating-cooling cycles. Samples were maintained at relatively high temperatures in H2 or O2 ambient atmospheres before performing electrical measurements under vacuum or be...

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Detalles Bibliográficos
Autor principal:	Williams, Federico Jose
Publicado:	2014
Materias:	Electron tunneling Oxygen diffusion SnO2 Conduction Mechanism Electrical measurement Electrical response Electron transport Heating-cooling cycle SnO<sub>2</sub> Tunneling transports Schottky barrier diodes Thick films Diffusion in gases
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09254005_v193_n_p428_Aldao http://hdl.handle.net/20.500.12110/paper_09254005_v193_n_p428_Aldao
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_09254005_v193_n_p428_Aldao
record_format	dspace
spelling	paper:paper_09254005_v193_n_p428_Aldao2023-06-08T15:51:17Z Conductivity in SnO2 polycrystalline thick film gas sensors: Tunneling electron transport and oxygen diffusion Williams, Federico Jose Electron tunneling Oxygen diffusion SnO2 Conduction Mechanism Electrical measurement Electrical response Electron transport Heating-cooling cycle Oxygen diffusion SnO<sub>2</sub> Tunneling transports Electron tunneling Schottky barrier diodes Thick films Diffusion in gases Conduction mechanisms in polycrystalline SnO2 thick sensing films were investigated by means of DC electrical resistance during heating-cooling cycles. Samples were maintained at relatively high temperatures in H2 or O2 ambient atmospheres before performing electrical measurements under vacuum or before performing XPS measurements in order to determine band bending. Results suggest that intergrains present Schottky barriers that are responsible for the observed conductivities regardless of gas pre-treatment. Oxygen diffusion modulates barrier widths affecting conductivity through tunneling transport. The electrical response to subsequent exposure to an oxygen atmosphere is consistent with our interpretation. © 2013 Elsevier B.V. All rights reserved. Fil:Williams, F.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09254005_v193_n_p428_Aldao http://hdl.handle.net/20.500.12110/paper_09254005_v193_n_p428_Aldao
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Electron tunneling Oxygen diffusion SnO2 Conduction Mechanism Electrical measurement Electrical response Electron transport Heating-cooling cycle Oxygen diffusion SnO<sub>2</sub> Tunneling transports Electron tunneling Schottky barrier diodes Thick films Diffusion in gases
spellingShingle	Electron tunneling Oxygen diffusion SnO2 Conduction Mechanism Electrical measurement Electrical response Electron transport Heating-cooling cycle Oxygen diffusion SnO<sub>2</sub> Tunneling transports Electron tunneling Schottky barrier diodes Thick films Diffusion in gases Williams, Federico Jose Conductivity in SnO2 polycrystalline thick film gas sensors: Tunneling electron transport and oxygen diffusion
topic_facet	Electron tunneling Oxygen diffusion SnO2 Conduction Mechanism Electrical measurement Electrical response Electron transport Heating-cooling cycle Oxygen diffusion SnO<sub>2</sub> Tunneling transports Electron tunneling Schottky barrier diodes Thick films Diffusion in gases
description	Conduction mechanisms in polycrystalline SnO2 thick sensing films were investigated by means of DC electrical resistance during heating-cooling cycles. Samples were maintained at relatively high temperatures in H2 or O2 ambient atmospheres before performing electrical measurements under vacuum or before performing XPS measurements in order to determine band bending. Results suggest that intergrains present Schottky barriers that are responsible for the observed conductivities regardless of gas pre-treatment. Oxygen diffusion modulates barrier widths affecting conductivity through tunneling transport. The electrical response to subsequent exposure to an oxygen atmosphere is consistent with our interpretation. © 2013 Elsevier B.V. All rights reserved.
author	Williams, Federico Jose
author_facet	Williams, Federico Jose
author_sort	Williams, Federico Jose
title	Conductivity in SnO2 polycrystalline thick film gas sensors: Tunneling electron transport and oxygen diffusion
title_short	Conductivity in SnO2 polycrystalline thick film gas sensors: Tunneling electron transport and oxygen diffusion
title_full	Conductivity in SnO2 polycrystalline thick film gas sensors: Tunneling electron transport and oxygen diffusion
title_fullStr	Conductivity in SnO2 polycrystalline thick film gas sensors: Tunneling electron transport and oxygen diffusion
title_full_unstemmed	Conductivity in SnO2 polycrystalline thick film gas sensors: Tunneling electron transport and oxygen diffusion
title_sort	conductivity in sno2 polycrystalline thick film gas sensors: tunneling electron transport and oxygen diffusion
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09254005_v193_n_p428_Aldao http://hdl.handle.net/20.500.12110/paper_09254005_v193_n_p428_Aldao
work_keys_str_mv	AT williamsfedericojose conductivityinsno2polycrystallinethickfilmgassensorstunnelingelectrontransportandoxygendiffusion
_version_	1768544232503508992

Conductivity in SnO2 polycrystalline thick film gas sensors: Tunneling electron transport and oxygen diffusion

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