Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibres
In this work we study the optoelectronic properties of individual TiO₂ fibres produced through coupled sol-gel and electrospinning, by depositing them onto pre-patterned Ti/Au electrodes on SiO₂/Si substrates. Transport measurements in the dark give a conductivity above 2 × 10<sup>-5</sup&g...
| Autores: | , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/720309 |
| Acceso en línea: | http://hdl.handle.net/10486/720309 https://dx.doi.org/10.1039/c6tc02344d |
| Access Level: | acceso abierto |
| Palabra clave: | highly responsive UV-photodetectors single electrospun TiO₂ nanofibres optoelectronic properties of individual TiO2 fibres coupled sol–gel and electrospinning Física Química |
| id |
ES_c91b1927040aa606cf66aef2a3d08a2e |
|---|---|
| oai_identifier_str |
oai:repositorio.uam.es:10486/720309 |
| network_acronym_str |
ES |
| network_name_str |
España |
| repository_id_str |
|
| spelling |
Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibresMolina Mendoza, Aday J.Moya Cuenca, AliciaGant, PatriciaGonzález Abad, SergioAntolín, ElisaAgrait de la Puente, Mario NicolásPérez de Lara, DavidVilatela, Juan J.Castellanos Gómez, AndrésFrisenda, RiccardoSvatek, Simon A.Rubio Bollinger, Gabinohighly responsive UV-photodetectorssingle electrospun TiO₂ nanofibresoptoelectronic properties of individual TiO2 fibrescoupled sol–gel and electrospinningFísicaQuímicaIn this work we study the optoelectronic properties of individual TiO₂ fibres produced through coupled sol-gel and electrospinning, by depositing them onto pre-patterned Ti/Au electrodes on SiO₂/Si substrates. Transport measurements in the dark give a conductivity above 2 × 10<sup>-5</sup>, which increases up to 8 × 10<sup>-5</sup> S in vacuum. Photocurrent measurements under UV-irradiation show high sensitivity (responsivity of 90 A W<sup>-1</sup> for 375 nm wavelength) and a response time to illumination of ∼5 s, which is superior to state-of-the-art TiO₂-based UV photodetectors. Both responsivity and response speed are higher in air than in vacuum, due to oxygen adsorbed on the TiO₂ surface which traps photoexcited free electrons in the conduction band, thus reducing the recombination processes. The photodetectors are sensitive to light polarization, with an anisotropy ratio of 12%. These results highlight the interesting combination of large surface area and low 1D transport resistance in electrospun TiO₂ fibres. The simplicity of the sol-gel/electrospinning synthesis method, combined with a fast response and high responsivity makes them attractive candidates for UV-photodetection in ambient conditions. We anticipate their high (photo) conductance is also relevant for photocatalysis and dye-sensitized solar cellsA. C.-G. acknowledges financial support from the BBVA Foundation through the fellowship “I Convocatoria de Ayudas Fundacion BBVA a Investigadores, Innovadores y Creadores Culturales”, from the MINECO (Ramón y Cajal 2014 program, RYC-2014-01406), from the MICINN (MAT2014-58399-JIN) and the European Commission under the Graphene Flagship, contract CNECTICT-604391. A. J. M.-M., G. R.-B., S. A. S. and N. A. acknowledge the support of the MICINN/MINECO (Spain) through the programs MAT2014-57915-R, BES-2012-057346 and FIS2011-23488, Comunidad de Madrid (Spain) through the programs NANOBIOMAGNET (s2009/MAT-1726) and S2013/MIT-3007 (MAD2D) and the European Commission through the FP7 ITN MOLESCO (Project Number 606728). A. M. and J. J. V. acknowledge the support of European Union Seventh Framework Program under grant agreements 310184 (CARINHYPH project), MINECO (MAT2015-62584-ERC, RyC-2014-15115, Spain) and the Madrid regional government (S2013/MIT-3007 MAD2D project). D. P. d. L. acknowledges the support of MICINN/MINECO (Spain) through the program FIS2015-67367-C2-1-P. R.F. acknowledges support from the Netherlands Organisation for Scientific Research (NWO) through the research program Rubicon with project number 680-50-1515Royal Society of ChemistryDepartamento de Física de la Materia CondensadaDepartamento de Química InorgánicaFacultad de Ciencias20162016-10-31research articlehttp://purl.org/coar/resource_type/c_2df8fbb1AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/720309https://dx.doi.org/10.1039/c6tc02344dreponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/7203092026-06-23T12:46:27Z |
| dc.title.none.fl_str_mv |
Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibres |
| title |
Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibres |
| spellingShingle |
Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibres Molina Mendoza, Aday J. highly responsive UV-photodetectors single electrospun TiO₂ nanofibres optoelectronic properties of individual TiO2 fibres coupled sol–gel and electrospinning Física Química |
| title_short |
Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibres |
| title_full |
Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibres |
| title_fullStr |
Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibres |
| title_full_unstemmed |
Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibres |
| title_sort |
Highly responsive UV-photodetectors based on single electrospun TiO2 nanofibres |
| dc.creator.none.fl_str_mv |
Molina Mendoza, Aday J. Moya Cuenca, Alicia Gant, Patricia González Abad, Sergio Antolín, Elisa Agrait de la Puente, Mario Nicolás Pérez de Lara, David Vilatela, Juan J. Castellanos Gómez, Andrés Frisenda, Riccardo Svatek, Simon A. Rubio Bollinger, Gabino |
| author |
Molina Mendoza, Aday J. |
| author_facet |
Molina Mendoza, Aday J. Moya Cuenca, Alicia Gant, Patricia González Abad, Sergio Antolín, Elisa Agrait de la Puente, Mario Nicolás Pérez de Lara, David Vilatela, Juan J. Castellanos Gómez, Andrés Frisenda, Riccardo Svatek, Simon A. Rubio Bollinger, Gabino |
| author_role |
author |
| author2 |
Moya Cuenca, Alicia Gant, Patricia González Abad, Sergio Antolín, Elisa Agrait de la Puente, Mario Nicolás Pérez de Lara, David Vilatela, Juan J. Castellanos Gómez, Andrés Frisenda, Riccardo Svatek, Simon A. Rubio Bollinger, Gabino |
| author2_role |
author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Departamento de Física de la Materia Condensada Departamento de Química Inorgánica Facultad de Ciencias |
| dc.subject.none.fl_str_mv |
highly responsive UV-photodetectors single electrospun TiO₂ nanofibres optoelectronic properties of individual TiO2 fibres coupled sol–gel and electrospinning Física Química |
| topic |
highly responsive UV-photodetectors single electrospun TiO₂ nanofibres optoelectronic properties of individual TiO2 fibres coupled sol–gel and electrospinning Física Química |
| description |
In this work we study the optoelectronic properties of individual TiO₂ fibres produced through coupled sol-gel and electrospinning, by depositing them onto pre-patterned Ti/Au electrodes on SiO₂/Si substrates. Transport measurements in the dark give a conductivity above 2 × 10<sup>-5</sup>, which increases up to 8 × 10<sup>-5</sup> S in vacuum. Photocurrent measurements under UV-irradiation show high sensitivity (responsivity of 90 A W<sup>-1</sup> for 375 nm wavelength) and a response time to illumination of ∼5 s, which is superior to state-of-the-art TiO₂-based UV photodetectors. Both responsivity and response speed are higher in air than in vacuum, due to oxygen adsorbed on the TiO₂ surface which traps photoexcited free electrons in the conduction band, thus reducing the recombination processes. The photodetectors are sensitive to light polarization, with an anisotropy ratio of 12%. These results highlight the interesting combination of large surface area and low 1D transport resistance in electrospun TiO₂ fibres. The simplicity of the sol-gel/electrospinning synthesis method, combined with a fast response and high responsivity makes them attractive candidates for UV-photodetection in ambient conditions. We anticipate their high (photo) conductance is also relevant for photocatalysis and dye-sensitized solar cells |
| publishDate |
2016 |
| dc.date.none.fl_str_mv |
2016 2016-10-31 |
| dc.type.none.fl_str_mv |
research article http://purl.org/coar/resource_type/c_2df8fbb1 AM http://purl.org/coar/version/c_ab4af688f83e57aa |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10486/720309 https://dx.doi.org/10.1039/c6tc02344d |
| url |
http://hdl.handle.net/10486/720309 https://dx.doi.org/10.1039/c6tc02344d |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
Royal Society of Chemistry |
| publisher.none.fl_str_mv |
Royal Society of Chemistry |
| dc.source.none.fl_str_mv |
reponame:Biblos-e Archivo. Repositorio Institucional de la UAM instname:Universidad Autónoma de Madrid |
| instname_str |
Universidad Autónoma de Madrid |
| reponame_str |
Biblos-e Archivo. Repositorio Institucional de la UAM |
| collection |
Biblos-e Archivo. Repositorio Institucional de la UAM |
| repository.name.fl_str_mv |
|
| repository.mail.fl_str_mv |
|
| _version_ |
1869419342891843584 |
| score |
15.81155 |