Mesoscopic modelling of bipolar charge Evolution in CN-PPV LEDs
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/3370 |
Resumo: | Since various chances are possible in the molecular structure of the repeat unit, substituted poly(para-phenylenevinylene) (PPV) has ben used as active component in light-emitting diodes (LEDs) to obtain light emission in a wide range of colours. A major aspect determining device performance is the competition between current flow, trapping and recombination within the polymer layer. By suitable Monte Carlo calculations, we have performed computer experiments in which bipolar charge carriers are injected at constant rate in polymer networks made of cyano-substituted PPV chains with variable length and orientation. The intra-molecular electronic properties used in these simulations were calculated by a quantum molecular dynamics method. In order to assess the influence of cyano-substitution on the properties of single-layer PPV LEDs, we have focused our attention on bipolar charge evolution in time. Specifically addressed are the differences in electric field strength needed for intra-molecular charge mobility of electrons and holes and their consequences at mesoscopic scale. |
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Mesoscopic modelling of bipolar charge Evolution in CN-PPV LEDsMesoscopic modellingCharge distributionRecombination efficiencyCN-PPVLEDScience & TechnologySince various chances are possible in the molecular structure of the repeat unit, substituted poly(para-phenylenevinylene) (PPV) has ben used as active component in light-emitting diodes (LEDs) to obtain light emission in a wide range of colours. A major aspect determining device performance is the competition between current flow, trapping and recombination within the polymer layer. By suitable Monte Carlo calculations, we have performed computer experiments in which bipolar charge carriers are injected at constant rate in polymer networks made of cyano-substituted PPV chains with variable length and orientation. The intra-molecular electronic properties used in these simulations were calculated by a quantum molecular dynamics method. In order to assess the influence of cyano-substitution on the properties of single-layer PPV LEDs, we have focused our attention on bipolar charge evolution in time. Specifically addressed are the differences in electric field strength needed for intra-molecular charge mobility of electrons and holes and their consequences at mesoscopic scale.Comunidade Europeia (CE). Fundo Europeu de Desenvolvimento Regional (FEDER)Fundação para a Ciência e a Tecnologia (FCT) – Programa Operacional “Ciência, Tecnologia, Inovação POCTI/CTM/41574/2001, SFRH/BD/11231/2002.ElsevierUniversidade do MinhoRamos, Marta M. D.Correia, Helena M. G.Ribeiro, R. M.2004-122004-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/3370eng"Synthetic Metals". ISSN 0379-6779. 147:1/3 (Dez. 2004)0379-677910.1016/j.synthmet.2004.05.032www.elsevier.cominfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:00:58Zoai:repositorium.sdum.uminho.pt:1822/3370Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:50:52.744228Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Mesoscopic modelling of bipolar charge Evolution in CN-PPV LEDs |
title |
Mesoscopic modelling of bipolar charge Evolution in CN-PPV LEDs |
spellingShingle |
Mesoscopic modelling of bipolar charge Evolution in CN-PPV LEDs Ramos, Marta M. D. Mesoscopic modelling Charge distribution Recombination efficiency CN-PPV LED Science & Technology |
title_short |
Mesoscopic modelling of bipolar charge Evolution in CN-PPV LEDs |
title_full |
Mesoscopic modelling of bipolar charge Evolution in CN-PPV LEDs |
title_fullStr |
Mesoscopic modelling of bipolar charge Evolution in CN-PPV LEDs |
title_full_unstemmed |
Mesoscopic modelling of bipolar charge Evolution in CN-PPV LEDs |
title_sort |
Mesoscopic modelling of bipolar charge Evolution in CN-PPV LEDs |
author |
Ramos, Marta M. D. |
author_facet |
Ramos, Marta M. D. Correia, Helena M. G. Ribeiro, R. M. |
author_role |
author |
author2 |
Correia, Helena M. G. Ribeiro, R. M. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Ramos, Marta M. D. Correia, Helena M. G. Ribeiro, R. M. |
dc.subject.por.fl_str_mv |
Mesoscopic modelling Charge distribution Recombination efficiency CN-PPV LED Science & Technology |
topic |
Mesoscopic modelling Charge distribution Recombination efficiency CN-PPV LED Science & Technology |
description |
Since various chances are possible in the molecular structure of the repeat unit, substituted poly(para-phenylenevinylene) (PPV) has ben used as active component in light-emitting diodes (LEDs) to obtain light emission in a wide range of colours. A major aspect determining device performance is the competition between current flow, trapping and recombination within the polymer layer. By suitable Monte Carlo calculations, we have performed computer experiments in which bipolar charge carriers are injected at constant rate in polymer networks made of cyano-substituted PPV chains with variable length and orientation. The intra-molecular electronic properties used in these simulations were calculated by a quantum molecular dynamics method. In order to assess the influence of cyano-substitution on the properties of single-layer PPV LEDs, we have focused our attention on bipolar charge evolution in time. Specifically addressed are the differences in electric field strength needed for intra-molecular charge mobility of electrons and holes and their consequences at mesoscopic scale. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-12 2004-12-01T00:00:00Z |
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://hdl.handle.net/1822/3370 |
url |
http://hdl.handle.net/1822/3370 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Synthetic Metals". ISSN 0379-6779. 147:1/3 (Dez. 2004) 0379-6779 10.1016/j.synthmet.2004.05.032 www.elsevier.com |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799132278837739520 |