Optical Analysis of the Light Emission from Porous Silicon:  A Hybrid Polyatom Surface-Coupled Fluorophor

Detalhes bibliográficos
Autor(a) principal: Silva, A. Ferreira da
Data de Publicação: 2006
Outros Autores: Pepe, Iuri Muniz, Gole, James L., Veje, Erling, Dixon, David A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/12907
Resumo: Texto completo: acesso restrito.p.2064-2073
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spelling Silva, A. Ferreira daPepe, Iuri MunizGole, James L.Veje, ErlingDixon, David A.Silva, A. Ferreira daPepe, Iuri MunizGole, James L.Veje, ErlingDixon, David A.2013-09-11T17:24:01Z20061520-6106http://www.repositorio.ufba.br/ri/handle/ri/12907v.110 n. 5Texto completo: acesso restrito.p.2064-2073The most extensive data set yet generated correlating photoluminescence excitation (PLE) and photoluminescence (PL) spectra is presented for aged (equilibrated) porous silicon (PS) samples. The observed features, which are temperature independent over the range 10−300 K, show a detailed correlation with the results of photoacoustic spectroscopy (PAS) and with molecular electronic structure calculations. The observed energy level patterns are reproduced in the photoabsorption (PA) of PS films released after the etching of a silicon wafer. It is concluded that the energy level pattern found for the photoluminescing surface of PS results from a structure which is neither uniquely molecule- or bulk-like but represents a hybrid form for which the density of states associated with a polyatomic vibrationally excited surface-bound fluorophor dominates the nature of the observed features which are not those of a semiconductor. These fluorophor features are broadened and shifted to lower excitation energy as a result of the intimate presence of the silicon surface to which the fluorophor is bound. The dominance of the surface-bound fluorophor accounts for the temperature-independent PLE and PL features. The observed spectral features are thus suggested to be the result of a strong synergistic interaction in which the silicon surface influences the location of surface-bound fluorophor excited states whereas the nature of the vibrationally excited surface-bound fluorophor coupling to the silicon surface provides the mechanism for an enhanced vibronic structure dominated interaction and energy transfer. The observed PLE, PL, PAS, and PA measurements are found to be consistent with previous photovoltaic and photoconductivity measurements, correlating well with a surface-bound oxyhydride-like emitter. This study suggests the important role that the overtone structure of a molecule bound to a surface can play as one forms a hybrid system.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-09-02T15:24:43Z No. of bitstreams: 1 jp0555302.pdf: 235843 bytes, checksum: cedfb9a13f4cfd7e00bccee898e0221a (MD5)Approved for entry into archive by Vilma Conceição(vilmagc@ufba.br) on 2013-09-11T17:24:01Z (GMT) No. of bitstreams: 1 jp0555302.pdf: 235843 bytes, checksum: cedfb9a13f4cfd7e00bccee898e0221a (MD5)Made available in DSpace on 2013-09-11T17:24:01Z (GMT). No. of bitstreams: 1 jp0555302.pdf: 235843 bytes, checksum: cedfb9a13f4cfd7e00bccee898e0221a (MD5) Previous issue date: 2006http://dx.doi.org/ 10.1021/jp0555302reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAPhotoluminescencePhotoabsorptionFluorophorFotoabsorçaoFotoluminescênciaFluoróforoOptical Analysis of the Light Emission from Porous Silicon:  A Hybrid Polyatom Surface-Coupled FluorophorJournal of Physical Chemistry Binfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01enginfo:eu-repo/semantics/openAccessORIGINALjp0555302.pdfjp0555302.pdfapplication/pdf235843https://repositorio.ufba.br/bitstream/ri/12907/1/jp0555302.pdfcedfb9a13f4cfd7e00bccee898e0221aMD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/12907/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXTjp0555302.pdf.txtjp0555302.pdf.txtExtracted texttext/plain63981https://repositorio.ufba.br/bitstream/ri/12907/3/jp0555302.pdf.txt3b70604b18929aeedf94b83f195758aeMD53ri/129072022-07-05 14:02:49.369oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:02:49Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Optical Analysis of the Light Emission from Porous Silicon:  A Hybrid Polyatom Surface-Coupled Fluorophor
dc.title.alternative.pt_BR.fl_str_mv Journal of Physical Chemistry B
title Optical Analysis of the Light Emission from Porous Silicon:  A Hybrid Polyatom Surface-Coupled Fluorophor
spellingShingle Optical Analysis of the Light Emission from Porous Silicon:  A Hybrid Polyatom Surface-Coupled Fluorophor
Silva, A. Ferreira da
Photoluminescence
Photoabsorption
Fluorophor
Fotoabsorçao
Fotoluminescência
Fluoróforo
title_short Optical Analysis of the Light Emission from Porous Silicon:  A Hybrid Polyatom Surface-Coupled Fluorophor
title_full Optical Analysis of the Light Emission from Porous Silicon:  A Hybrid Polyatom Surface-Coupled Fluorophor
title_fullStr Optical Analysis of the Light Emission from Porous Silicon:  A Hybrid Polyatom Surface-Coupled Fluorophor
title_full_unstemmed Optical Analysis of the Light Emission from Porous Silicon:  A Hybrid Polyatom Surface-Coupled Fluorophor
title_sort Optical Analysis of the Light Emission from Porous Silicon:  A Hybrid Polyatom Surface-Coupled Fluorophor
author Silva, A. Ferreira da
author_facet Silva, A. Ferreira da
Pepe, Iuri Muniz
Gole, James L.
Veje, Erling
Dixon, David A.
author_role author
author2 Pepe, Iuri Muniz
Gole, James L.
Veje, Erling
Dixon, David A.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Silva, A. Ferreira da
Pepe, Iuri Muniz
Gole, James L.
Veje, Erling
Dixon, David A.
Silva, A. Ferreira da
Pepe, Iuri Muniz
Gole, James L.
Veje, Erling
Dixon, David A.
dc.subject.por.fl_str_mv Photoluminescence
Photoabsorption
Fluorophor
Fotoabsorçao
Fotoluminescência
Fluoróforo
topic Photoluminescence
Photoabsorption
Fluorophor
Fotoabsorçao
Fotoluminescência
Fluoróforo
description Texto completo: acesso restrito.p.2064-2073
publishDate 2006
dc.date.issued.fl_str_mv 2006
dc.date.accessioned.fl_str_mv 2013-09-11T17:24:01Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/12907
dc.identifier.issn.none.fl_str_mv 1520-6106
dc.identifier.number.pt_BR.fl_str_mv v.110 n. 5
identifier_str_mv 1520-6106
v.110 n. 5
url http://www.repositorio.ufba.br/ri/handle/ri/12907
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/ 10.1021/jp0555302
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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instname_str Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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