Solution processed high refractive index contrast distributed Bragg reflectors

We have developed a method to alternate porous and dense dielectric films in order to build high refractive index contrast distributed Bragg reflectors (DBRs) capable of reflecting very efficiently in a targeted spectral range employing a small number of layers in the stack. Porous layers made of Si...

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Autores: Anaya, Miguel, Rubino, Andrea, Calvo, Mauricio E., Míguez, Hernán
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/132564
Acceso en línea:http://hdl.handle.net/10261/132564
Access Level:acceso abierto
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spelling Solution processed high refractive index contrast distributed Bragg reflectorsAnaya, MiguelRubino, AndreaCalvo, Mauricio E.Míguez, HernánWe have developed a method to alternate porous and dense dielectric films in order to build high refractive index contrast distributed Bragg reflectors (DBRs) capable of reflecting very efficiently in a targeted spectral range employing a small number of layers in the stack. Porous layers made of SiO2 nanoparticles and compact sol–gel processed TiO2 layers are sequentially deposited. The key to the preservation of porosity of every other layer during the deposition process is the use of a sacrificial layer of polystyrene that prevents the infiltration of the interstitial voids between nanoparticles with the homogeneous solution of TiO2 precursors. Our approach allows preparing a series of DBRs operating along the whole visible spectral range. Reflectance values as high as 90% are achieved from only seven layers. The particular distribution of porosity along one direction gives rise to an interesting interplay between the optical properties of the system and the vapor pressure in the surrounding atmosphere, which we foresee could be put into practice in gas sensing devicesThe research leading to these results received funding from the European Research Council under the European Union's Seventh Framework Programme (FP7/2007–2013)/ERC grant agreement no. 307081 (POLIGHT) and the Spanish Ministry of Economy and Competitiveness under grant MAT2014 54852-R. MA is grateful to “La Caixa” Foundation for its financial support. FESEM characterization was performed at CITIUS, and we are grateful for its support.We acknowledge support by the CSIC Open Access Publication Initiative through its Unit of Information Resources for Research (URICI).Peer reviewedRoyal Society of Chemistry (UK)European Research CouncilEuropean CommissionFundación la CaixaMinisterio de Economía y Competitividad (España)CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/132564reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/307081info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2014 54852-Rhttp://dx.doi.org/10.1039/c6tc00663aSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1325642026-05-22T06:33:51Z
dc.title.none.fl_str_mv Solution processed high refractive index contrast distributed Bragg reflectors
title Solution processed high refractive index contrast distributed Bragg reflectors
spellingShingle Solution processed high refractive index contrast distributed Bragg reflectors
Anaya, Miguel
title_short Solution processed high refractive index contrast distributed Bragg reflectors
title_full Solution processed high refractive index contrast distributed Bragg reflectors
title_fullStr Solution processed high refractive index contrast distributed Bragg reflectors
title_full_unstemmed Solution processed high refractive index contrast distributed Bragg reflectors
title_sort Solution processed high refractive index contrast distributed Bragg reflectors
dc.creator.none.fl_str_mv Anaya, Miguel
Rubino, Andrea
Calvo, Mauricio E.
Míguez, Hernán
author Anaya, Miguel
author_facet Anaya, Miguel
Rubino, Andrea
Calvo, Mauricio E.
Míguez, Hernán
author_role author
author2 Rubino, Andrea
Calvo, Mauricio E.
Míguez, Hernán
author2_role author
author
author
dc.contributor.none.fl_str_mv European Research Council
European Commission
Fundación la Caixa
Ministerio de Economía y Competitividad (España)
CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description We have developed a method to alternate porous and dense dielectric films in order to build high refractive index contrast distributed Bragg reflectors (DBRs) capable of reflecting very efficiently in a targeted spectral range employing a small number of layers in the stack. Porous layers made of SiO2 nanoparticles and compact sol–gel processed TiO2 layers are sequentially deposited. The key to the preservation of porosity of every other layer during the deposition process is the use of a sacrificial layer of polystyrene that prevents the infiltration of the interstitial voids between nanoparticles with the homogeneous solution of TiO2 precursors. Our approach allows preparing a series of DBRs operating along the whole visible spectral range. Reflectance values as high as 90% are achieved from only seven layers. The particular distribution of porosity along one direction gives rise to an interesting interplay between the optical properties of the system and the vapor pressure in the surrounding atmosphere, which we foresee could be put into practice in gas sensing devices
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/132564
url http://hdl.handle.net/10261/132564
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/307081
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2014 54852-R
http://dx.doi.org/10.1039/c6tc00663a
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Royal Society of Chemistry (UK)
publisher.none.fl_str_mv Royal Society of Chemistry (UK)
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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