Polarized emission from stretched PPV films viewed at the molecular level.
Autor(a) principal: | |
---|---|
Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFOP |
Texto Completo: | http://www.repositorio.ufop.br/handle/123456789/7190 http://pubs.rsc.org/En/content/articlepdf/2015/cp/c5cp02513c https://doi.org/10.1039/C5CP02513C |
Resumo: | We present a study on the photoluminescence (PL) of thin films of poly-(p-phenylene vinylene) (PPV), non-stretched and uniaxially stretched. The experimental study was carried out using linear polarized light as the excitation beam, oriented either parallel or perpendicular to the stretch axis (S). The results showed that when the excitation light source has polarization perpendicularly oriented to the stretch direction, the emitted PL presents maximum intensity in the orientation S, and a minimum in the direction orthogonal to S. In order to understand this interesting phenomenon, we employ theoretical simulations at the atomistic level. We use classical molecular dynamics to simulate amorphous PPV films, non-stretched and stretched, from which we find a tendency of overall alignment of PV units to S, and of local clustering in herring-bone and p-stacking partial symmetries. Our study of optical activity of these kinds of clusters, performed through a quantum semi-empirical method, allows us to explain this polarization conversion behavior, and indicates the possibility of using underivatized PPV as the active layer for polarized electroluminescent devices. |
id |
UFOP_70e5f2d984c26b3473bc013545aa8c8d |
---|---|
oai_identifier_str |
oai:localhost:123456789/7190 |
network_acronym_str |
UFOP |
network_name_str |
Repositório Institucional da UFOP |
repository_id_str |
3233 |
spelling |
Ramos, RodrigoSavedra, Melissa Fabíola SiqueiraCazati, ThiagoFaria, Roberto MendonçaCaldas, Marília J.2017-02-01T13:39:12Z2017-02-01T13:39:12Z2015RAMOS, R. et al. Polarized emission from stretched PPV films viewed at the molecular level. Physical Chemistry Chemical Physics, v. 17, p. 20530-20536, 2015. Disponível em: <http://pubs.rsc.org/En/content/articlepdf/2015/cp/c5cp02513c>. Acesso em: 23 jan. 2017.1463-9076http://www.repositorio.ufop.br/handle/123456789/7190http://pubs.rsc.org/En/content/articlepdf/2015/cp/c5cp02513chttps://doi.org/10.1039/C5CP02513CWe present a study on the photoluminescence (PL) of thin films of poly-(p-phenylene vinylene) (PPV), non-stretched and uniaxially stretched. The experimental study was carried out using linear polarized light as the excitation beam, oriented either parallel or perpendicular to the stretch axis (S). The results showed that when the excitation light source has polarization perpendicularly oriented to the stretch direction, the emitted PL presents maximum intensity in the orientation S, and a minimum in the direction orthogonal to S. In order to understand this interesting phenomenon, we employ theoretical simulations at the atomistic level. We use classical molecular dynamics to simulate amorphous PPV films, non-stretched and stretched, from which we find a tendency of overall alignment of PV units to S, and of local clustering in herring-bone and p-stacking partial symmetries. Our study of optical activity of these kinds of clusters, performed through a quantum semi-empirical method, allows us to explain this polarization conversion behavior, and indicates the possibility of using underivatized PPV as the active layer for polarized electroluminescent devices.Polarized emission from stretched PPV films viewed at the molecular level.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccessengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-8924http://www.repositorio.ufop.br/bitstream/123456789/7190/2/license.txt62604f8d955274beb56c80ce1ee5dcaeMD52ORIGINALARTIGO_PolarizedEmissionStretched.pdfARTIGO_PolarizedEmissionStretched.pdfapplication/pdf2720972http://www.repositorio.ufop.br/bitstream/123456789/7190/1/ARTIGO_PolarizedEmissionStretched.pdfe5e39a1b54bacd2569d75930ab2e9191MD51123456789/71902019-10-21 11:25:34.647oai:localhost: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ório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-10-21T15:25:34Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false |
dc.title.pt_BR.fl_str_mv |
Polarized emission from stretched PPV films viewed at the molecular level. |
title |
Polarized emission from stretched PPV films viewed at the molecular level. |
spellingShingle |
Polarized emission from stretched PPV films viewed at the molecular level. Ramos, Rodrigo |
title_short |
Polarized emission from stretched PPV films viewed at the molecular level. |
title_full |
Polarized emission from stretched PPV films viewed at the molecular level. |
title_fullStr |
Polarized emission from stretched PPV films viewed at the molecular level. |
title_full_unstemmed |
Polarized emission from stretched PPV films viewed at the molecular level. |
title_sort |
Polarized emission from stretched PPV films viewed at the molecular level. |
author |
Ramos, Rodrigo |
author_facet |
Ramos, Rodrigo Savedra, Melissa Fabíola Siqueira Cazati, Thiago Faria, Roberto Mendonça Caldas, Marília J. |
author_role |
author |
author2 |
Savedra, Melissa Fabíola Siqueira Cazati, Thiago Faria, Roberto Mendonça Caldas, Marília J. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Ramos, Rodrigo Savedra, Melissa Fabíola Siqueira Cazati, Thiago Faria, Roberto Mendonça Caldas, Marília J. |
description |
We present a study on the photoluminescence (PL) of thin films of poly-(p-phenylene vinylene) (PPV), non-stretched and uniaxially stretched. The experimental study was carried out using linear polarized light as the excitation beam, oriented either parallel or perpendicular to the stretch axis (S). The results showed that when the excitation light source has polarization perpendicularly oriented to the stretch direction, the emitted PL presents maximum intensity in the orientation S, and a minimum in the direction orthogonal to S. In order to understand this interesting phenomenon, we employ theoretical simulations at the atomistic level. We use classical molecular dynamics to simulate amorphous PPV films, non-stretched and stretched, from which we find a tendency of overall alignment of PV units to S, and of local clustering in herring-bone and p-stacking partial symmetries. Our study of optical activity of these kinds of clusters, performed through a quantum semi-empirical method, allows us to explain this polarization conversion behavior, and indicates the possibility of using underivatized PPV as the active layer for polarized electroluminescent devices. |
publishDate |
2015 |
dc.date.issued.fl_str_mv |
2015 |
dc.date.accessioned.fl_str_mv |
2017-02-01T13:39:12Z |
dc.date.available.fl_str_mv |
2017-02-01T13:39:12Z |
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.citation.fl_str_mv |
RAMOS, R. et al. Polarized emission from stretched PPV films viewed at the molecular level. Physical Chemistry Chemical Physics, v. 17, p. 20530-20536, 2015. Disponível em: <http://pubs.rsc.org/En/content/articlepdf/2015/cp/c5cp02513c>. Acesso em: 23 jan. 2017. |
dc.identifier.uri.fl_str_mv |
http://www.repositorio.ufop.br/handle/123456789/7190 |
dc.identifier.issn.none.fl_str_mv |
1463-9076 |
dc.identifier.uri2.pt_BR.fl_str_mv |
http://pubs.rsc.org/En/content/articlepdf/2015/cp/c5cp02513c |
dc.identifier.doi.none.fl_str_mv |
https://doi.org/10.1039/C5CP02513C |
identifier_str_mv |
RAMOS, R. et al. Polarized emission from stretched PPV films viewed at the molecular level. Physical Chemistry Chemical Physics, v. 17, p. 20530-20536, 2015. Disponível em: <http://pubs.rsc.org/En/content/articlepdf/2015/cp/c5cp02513c>. Acesso em: 23 jan. 2017. 1463-9076 |
url |
http://www.repositorio.ufop.br/handle/123456789/7190 http://pubs.rsc.org/En/content/articlepdf/2015/cp/c5cp02513c https://doi.org/10.1039/C5CP02513C |
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.none.fl_str_mv |
reponame:Repositório Institucional da UFOP instname:Universidade Federal de Ouro Preto (UFOP) instacron:UFOP |
instname_str |
Universidade Federal de Ouro Preto (UFOP) |
instacron_str |
UFOP |
institution |
UFOP |
reponame_str |
Repositório Institucional da UFOP |
collection |
Repositório Institucional da UFOP |
bitstream.url.fl_str_mv |
http://www.repositorio.ufop.br/bitstream/123456789/7190/2/license.txt http://www.repositorio.ufop.br/bitstream/123456789/7190/1/ARTIGO_PolarizedEmissionStretched.pdf |
bitstream.checksum.fl_str_mv |
62604f8d955274beb56c80ce1ee5dcae e5e39a1b54bacd2569d75930ab2e9191 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP) |
repository.mail.fl_str_mv |
repositorio@ufop.edu.br |
_version_ |
1801685708901974016 |