Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantation
Autor(a) principal: | |
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Data de Publicação: | 2010 |
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/10773/6127 |
Resumo: | Self-assembled GaN quantum dots (QDs) stacked in superlattices (SL) with AlN spacer layers were implanted with Europium ions to fluences of 1013, 1014, and 1015 cm−2. The damage level introduced in the QDs by the implantation stays well below that of thick GaN epilayers. For the lowest fluence, the structural properties remain unchanged after implantation and annealing while for higher fluences the implantation damage causes an expansion of the SL in the [0001] direction which increases with implantation fluence and is only partly reversed after thermal annealing at 1000 °C. Nevertheless, in all cases, the SL quality remains very good after implantation and annealing with Eu ions incorporated preferentially into near-substitutional cation sites. Eu3+ optical activation is achieved after annealing in all samples. In the sample implanted with the lowest fluence, the Eu3+ emission arises mainly from Eu incorporated inside the QDs while for the higher fluences only the emission from Eu inside the AlN-buffer, capping, and spacer layers is observed. © 2010 American Institute of Physics |
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Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantationAluminium compoundsAnnealingEuropiumGallium compoundsIII-V semiconductorsIon implantationSelf-assemblySemiconductor quantum dotsSemiconductor superlatticesWide band gap semiconductorsSelf-assembled GaN quantum dots (QDs) stacked in superlattices (SL) with AlN spacer layers were implanted with Europium ions to fluences of 1013, 1014, and 1015 cm−2. The damage level introduced in the QDs by the implantation stays well below that of thick GaN epilayers. For the lowest fluence, the structural properties remain unchanged after implantation and annealing while for higher fluences the implantation damage causes an expansion of the SL in the [0001] direction which increases with implantation fluence and is only partly reversed after thermal annealing at 1000 °C. Nevertheless, in all cases, the SL quality remains very good after implantation and annealing with Eu ions incorporated preferentially into near-substitutional cation sites. Eu3+ optical activation is achieved after annealing in all samples. In the sample implanted with the lowest fluence, the Eu3+ emission arises mainly from Eu incorporated inside the QDs while for the higher fluences only the emission from Eu inside the AlN-buffer, capping, and spacer layers is observed. © 2010 American Institute of PhysicsAIP2012-02-09T16:34:38Z2010-10-21T00:00:00Z2010-10-21info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/6127eng0021-8979Magalhães, S.Peres, M.Fellmann, V.Daudin, B.Neves, A.J.Alves, E.Monteiro, T.Lorenz, K.info: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:RCAAP2024-02-22T11:07:58Zoai:ria.ua.pt:10773/6127Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:43:23.719594Repositório 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 |
Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantation |
title |
Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantation |
spellingShingle |
Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantation Magalhães, S. Aluminium compounds Annealing Europium Gallium compounds III-V semiconductors Ion implantation Self-assembly Semiconductor quantum dots Semiconductor superlattices Wide band gap semiconductors |
title_short |
Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantation |
title_full |
Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantation |
title_fullStr |
Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantation |
title_full_unstemmed |
Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantation |
title_sort |
Functionalizing self-assembled GaN quantum dot superlattices by Eu-implantation |
author |
Magalhães, S. |
author_facet |
Magalhães, S. Peres, M. Fellmann, V. Daudin, B. Neves, A.J. Alves, E. Monteiro, T. Lorenz, K. |
author_role |
author |
author2 |
Peres, M. Fellmann, V. Daudin, B. Neves, A.J. Alves, E. Monteiro, T. Lorenz, K. |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Magalhães, S. Peres, M. Fellmann, V. Daudin, B. Neves, A.J. Alves, E. Monteiro, T. Lorenz, K. |
dc.subject.por.fl_str_mv |
Aluminium compounds Annealing Europium Gallium compounds III-V semiconductors Ion implantation Self-assembly Semiconductor quantum dots Semiconductor superlattices Wide band gap semiconductors |
topic |
Aluminium compounds Annealing Europium Gallium compounds III-V semiconductors Ion implantation Self-assembly Semiconductor quantum dots Semiconductor superlattices Wide band gap semiconductors |
description |
Self-assembled GaN quantum dots (QDs) stacked in superlattices (SL) with AlN spacer layers were implanted with Europium ions to fluences of 1013, 1014, and 1015 cm−2. The damage level introduced in the QDs by the implantation stays well below that of thick GaN epilayers. For the lowest fluence, the structural properties remain unchanged after implantation and annealing while for higher fluences the implantation damage causes an expansion of the SL in the [0001] direction which increases with implantation fluence and is only partly reversed after thermal annealing at 1000 °C. Nevertheless, in all cases, the SL quality remains very good after implantation and annealing with Eu ions incorporated preferentially into near-substitutional cation sites. Eu3+ optical activation is achieved after annealing in all samples. In the sample implanted with the lowest fluence, the Eu3+ emission arises mainly from Eu incorporated inside the QDs while for the higher fluences only the emission from Eu inside the AlN-buffer, capping, and spacer layers is observed. © 2010 American Institute of Physics |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-10-21T00:00:00Z 2010-10-21 2012-02-09T16:34:38Z |
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/10773/6127 |
url |
http://hdl.handle.net/10773/6127 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0021-8979 |
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 |
AIP |
publisher.none.fl_str_mv |
AIP |
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 |
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