Mesoscopic study of bipolar charge transport in polymer-based devices
Autor(a) principal: | |
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Data de Publicação: | 2001 |
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/1822/3359 |
Resumo: | We present generalised Monte-Carlo calculations of bipolar charge carrier transport in polydiacetylene to assess effects of some key factors on the properties of polymer-based light emitting diodes. Our mesoscopic model includes specific realisations of the polymer network and examines the effect of polymer structural order on current flow and charge recombination within the polymer layer. Specifically addressed are the issues concerning the fractions of polymer strands contributing to the charge injection processes at electrode interfaces and to electroluminescence. Our results suggest that radiative recombination increases as short chain concentration increases, whereas current efficiency shows an opposite behaviour. Radiative recombination decreases as charge injection efficiency decreases and its internal efficiency seems to saturate for a luminescent chain concentration greater than 30%. Our results also suggest that both current efficiency and space charge increases as charge injection efficiency decreases. Polymer disorder due to inclusions in the network does seem to contribute to reduce both current and recombination efficiencies. |
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Mesoscopic study of bipolar charge transport in polymer-based devicesMesoscopic modellingConducting polymersElectroluminescenceConjugated polymersConducting polymersScience & TechnologyWe present generalised Monte-Carlo calculations of bipolar charge carrier transport in polydiacetylene to assess effects of some key factors on the properties of polymer-based light emitting diodes. Our mesoscopic model includes specific realisations of the polymer network and examines the effect of polymer structural order on current flow and charge recombination within the polymer layer. Specifically addressed are the issues concerning the fractions of polymer strands contributing to the charge injection processes at electrode interfaces and to electroluminescence. Our results suggest that radiative recombination increases as short chain concentration increases, whereas current efficiency shows an opposite behaviour. Radiative recombination decreases as charge injection efficiency decreases and its internal efficiency seems to saturate for a luminescent chain concentration greater than 30%. Our results also suggest that both current efficiency and space charge increases as charge injection efficiency decreases. Polymer disorder due to inclusions in the network does seem to contribute to reduce both current and recombination efficiencies.ElsevierUniversidade do MinhoRamos, Marta M. D.Stoneham, A. M.2001-052001-05-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/3359eng“Synthetic Metals”. ISSN 0379-6779. 122:1 (2001) 149-151.0379-677910.1016/S0379-6779(00)01333-3http://www.elsevier.com/wps/find/journaldescription.cws_home/504105/description#descriptionhttp://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TY7-42G0MPM-18-9&_cdi=5611&_user=2459786&_orig=search&_coverDate=05%2F01%2F2001&_sk=998779998&view=c&wchp=dGLbVtb-zSkzS&md5=e363d29d1764e58727a919d790bbb00b&ie=/sdarticle.pdfinfo: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:RCAAP2023-07-21T12:04:51Zoai:repositorium.sdum.uminho.pt:1822/3359Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:55:11.203145Repositório 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 study of bipolar charge transport in polymer-based devices |
title |
Mesoscopic study of bipolar charge transport in polymer-based devices |
spellingShingle |
Mesoscopic study of bipolar charge transport in polymer-based devices Ramos, Marta M. D. Mesoscopic modelling Conducting polymers Electroluminescence Conjugated polymers Conducting polymers Science & Technology |
title_short |
Mesoscopic study of bipolar charge transport in polymer-based devices |
title_full |
Mesoscopic study of bipolar charge transport in polymer-based devices |
title_fullStr |
Mesoscopic study of bipolar charge transport in polymer-based devices |
title_full_unstemmed |
Mesoscopic study of bipolar charge transport in polymer-based devices |
title_sort |
Mesoscopic study of bipolar charge transport in polymer-based devices |
author |
Ramos, Marta M. D. |
author_facet |
Ramos, Marta M. D. Stoneham, A. M. |
author_role |
author |
author2 |
Stoneham, A. M. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Ramos, Marta M. D. Stoneham, A. M. |
dc.subject.por.fl_str_mv |
Mesoscopic modelling Conducting polymers Electroluminescence Conjugated polymers Conducting polymers Science & Technology |
topic |
Mesoscopic modelling Conducting polymers Electroluminescence Conjugated polymers Conducting polymers Science & Technology |
description |
We present generalised Monte-Carlo calculations of bipolar charge carrier transport in polydiacetylene to assess effects of some key factors on the properties of polymer-based light emitting diodes. Our mesoscopic model includes specific realisations of the polymer network and examines the effect of polymer structural order on current flow and charge recombination within the polymer layer. Specifically addressed are the issues concerning the fractions of polymer strands contributing to the charge injection processes at electrode interfaces and to electroluminescence. Our results suggest that radiative recombination increases as short chain concentration increases, whereas current efficiency shows an opposite behaviour. Radiative recombination decreases as charge injection efficiency decreases and its internal efficiency seems to saturate for a luminescent chain concentration greater than 30%. Our results also suggest that both current efficiency and space charge increases as charge injection efficiency decreases. Polymer disorder due to inclusions in the network does seem to contribute to reduce both current and recombination efficiencies. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-05 2001-05-01T00:00:00Z |
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/1822/3359 |
url |
http://hdl.handle.net/1822/3359 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
“Synthetic Metals”. ISSN 0379-6779. 122:1 (2001) 149-151. 0379-6779 10.1016/S0379-6779(00)01333-3 http://www.elsevier.com/wps/find/journaldescription.cws_home/504105/description#description http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TY7-42G0MPM-18-9&_cdi=5611&_user=2459786&_orig=search&_coverDate=05%2F01%2F2001&_sk=998779998&view=c&wchp=dGLbVtb-zSkzS&md5=e363d29d1764e58727a919d790bbb00b&ie=/sdarticle.pdf |
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 |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799132336510468096 |