Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires

Detalhes bibliográficos
Autor(a) principal: Zagonel, Luiz Fernando, 1979-
Data de Publicação: 2016
Outros Autores: Vitiello, Gabriel Ziviani, 1991-
Tipo de documento: Artigo
Título da fonte: Repositório da Produção Científica e Intelectual da Unicamp
Texto Completo: https://hdl.handle.net/20.500.12733/1667244
Resumo: Agradecimentos: This work has received support from CNPq and from projects 2014/23399-9 and 2012/10127-5, São Paulo Research Foundation (FAPESP). This work has received support from the French State managed by the National Agency for Research under the program of future investment EQUIPEX TEMPOS-CHROMATEM with the reference ANR-10-EQPX-50 as well as ANR "Investissement d'Avenir" programs "GaNeX" (ANR-11- LABX-2014) and "NanoSaclay" (ANR-10-LABX-0035). The research leading to these results has received funding from the European Union Seventh Framework Programme [No. FP7/2007- 2013] under Grant Agreement No. n312483 (ESTEEM2). The research described here has been partly supported by Triangle de la physique contract 2009–066T-eLight. TO and PAM acknowledge the support received from the European Union Seventh Framework Program under Grant Agreement 291 522–3DIMAGE. FDP and CD acknowledge funding from the ERC under grant number 25961 9 PHOTO EM
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spelling Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowiresDiodos emissores de luzNanofios semicondutoresNitreto de gálioLight-emitting diodesSemiconductors nanowiresGallium nitrideArtigo originalAgradecimentos: This work has received support from CNPq and from projects 2014/23399-9 and 2012/10127-5, São Paulo Research Foundation (FAPESP). This work has received support from the French State managed by the National Agency for Research under the program of future investment EQUIPEX TEMPOS-CHROMATEM with the reference ANR-10-EQPX-50 as well as ANR "Investissement d'Avenir" programs "GaNeX" (ANR-11- LABX-2014) and "NanoSaclay" (ANR-10-LABX-0035). The research leading to these results has received funding from the European Union Seventh Framework Programme [No. FP7/2007- 2013] under Grant Agreement No. n312483 (ESTEEM2). The research described here has been partly supported by Triangle de la physique contract 2009–066T-eLight. TO and PAM acknowledge the support received from the European Union Seventh Framework Program under Grant Agreement 291 522–3DIMAGE. FDP and CD acknowledge funding from the ERC under grant number 25961 9 PHOTO EMAbstract: We report on a detailed study of the intensity dependent optical properties of individual GaN/AlN quantum disks (QDisks) embedded into GaN nanowires (NW). The structural and optical properties of the QDisks were probed by high spatial resolution cathodoluminescence (CL) in a scanning transmission electron microscope (STEM). By exciting the QDisks with a nanometric electron beam at currents spanning over three orders of magnitude, strong nonlinearities (energy shifts) in the light emission are observed. In particular, we find that the amount of energy shift depends on the emission rate and on the QDisk morphology (size, position along the NW and shell thickness). For thick QDisks (>4 nm), the QDisk emission energy is observed to blueshift with the increase of the emission intensity. This is interpreted as a consequence of the increase of carriers density excited by the incident electron beam inside the QDisks, which screens the internal electric field and thus reduces the quantum confined Stark effect (QCSE) present in these QDisks. For thinner QDisks (<3nm), the blueshift is almost absent in agreement with the negligible QCSE at such sizes. For QDisks of intermediate sizes there exists a current threshold above which the energy shifts, marking the transition from unscreened to partially screened QCSE. From the threshold value we estimate the lifetime in the unscreened regime. These observations suggest that, counterintuitively, electrons of high energy can behave ultimately as single electron-hole pair generators. In addition, when we increase the current from 1 to 10 pA the light emission efficiency drops by more than one order of magnitude. This reduction of the emission efficiency is a manifestation of the "efficiency droop" as observed in nitride-based 2D light emitting diodes, a phenomenon tentatively attributed to the Auger effectCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPAbertoUNIVERSIDADE ESTADUAL DE CAMPINASZagonel, Luiz Fernando, 1979-Vitiello, Gabriel Ziviani, 1991-2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.12733/1667244ZAGONEL, Luiz Fernando; VITIELLO, Gabriel Ziviani. Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires. Physical review. B, Covering condensed matter and materials physics. College Park, MD : American Physical Society, 2016. Vol. 93, n. 20 (May, 2016), n. art. 205410, p. 1-12. Disponível em: https://hdl.handle.net/20.500.12733/1667244. Acesso em: 24 mai. 2023.Inglêshttps://repositorio.unicamp.br/acervo/detalhe/1220752reponame:Repositório da Produção Científica e Intelectual da Unicampinstname:Universidade Estadual de Campinas (UNICAMP)instacron:UNICAMPinfo:eu-repo/semantics/openAccess2022-06-24T14:39:54Zoai:https://www.repositorio.unicamp.br/:1220752Repositório InstitucionalPUBhttp://repositorio.unicamp.br/oai/requestreposip@unicamp.bropendoar:2022-06-24T14:39:54Repositório da Produção Científica e Intelectual da Unicamp - Universidade Estadual de Campinas (UNICAMP)false
dc.title.none.fl_str_mv Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires
title Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires
spellingShingle Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires
Zagonel, Luiz Fernando, 1979-
Diodos emissores de luz
Nanofios semicondutores
Nitreto de gálio
Light-emitting diodes
Semiconductors nanowires
Gallium nitride
Artigo original
title_short Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires
title_full Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires
title_fullStr Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires
title_full_unstemmed Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires
title_sort Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires
author Zagonel, Luiz Fernando, 1979-
author_facet Zagonel, Luiz Fernando, 1979-
Vitiello, Gabriel Ziviani, 1991-
author_role author
author2 Vitiello, Gabriel Ziviani, 1991-
author2_role author
dc.contributor.none.fl_str_mv UNIVERSIDADE ESTADUAL DE CAMPINAS
dc.contributor.author.fl_str_mv Zagonel, Luiz Fernando, 1979-
Vitiello, Gabriel Ziviani, 1991-
dc.subject.por.fl_str_mv Diodos emissores de luz
Nanofios semicondutores
Nitreto de gálio
Light-emitting diodes
Semiconductors nanowires
Gallium nitride
Artigo original
topic Diodos emissores de luz
Nanofios semicondutores
Nitreto de gálio
Light-emitting diodes
Semiconductors nanowires
Gallium nitride
Artigo original
description Agradecimentos: This work has received support from CNPq and from projects 2014/23399-9 and 2012/10127-5, São Paulo Research Foundation (FAPESP). This work has received support from the French State managed by the National Agency for Research under the program of future investment EQUIPEX TEMPOS-CHROMATEM with the reference ANR-10-EQPX-50 as well as ANR "Investissement d'Avenir" programs "GaNeX" (ANR-11- LABX-2014) and "NanoSaclay" (ANR-10-LABX-0035). The research leading to these results has received funding from the European Union Seventh Framework Programme [No. FP7/2007- 2013] under Grant Agreement No. n312483 (ESTEEM2). The research described here has been partly supported by Triangle de la physique contract 2009–066T-eLight. TO and PAM acknowledge the support received from the European Union Seventh Framework Program under Grant Agreement 291 522–3DIMAGE. FDP and CD acknowledge funding from the ERC under grant number 25961 9 PHOTO EM
publishDate 2016
dc.date.none.fl_str_mv 2016
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 https://hdl.handle.net/20.500.12733/1667244
ZAGONEL, Luiz Fernando; VITIELLO, Gabriel Ziviani. Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires. Physical review. B, Covering condensed matter and materials physics. College Park, MD : American Physical Society, 2016. Vol. 93, n. 20 (May, 2016), n. art. 205410, p. 1-12. Disponível em: https://hdl.handle.net/20.500.12733/1667244. Acesso em: 24 mai. 2023.
url https://hdl.handle.net/20.500.12733/1667244
identifier_str_mv ZAGONEL, Luiz Fernando; VITIELLO, Gabriel Ziviani. Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires. Physical review. B, Covering condensed matter and materials physics. College Park, MD : American Physical Society, 2016. Vol. 93, n. 20 (May, 2016), n. art. 205410, p. 1-12. Disponível em: https://hdl.handle.net/20.500.12733/1667244. Acesso em: 24 mai. 2023.
dc.language.iso.fl_str_mv Inglês
language_invalid_str_mv Inglês
dc.relation.none.fl_str_mv https://repositorio.unicamp.br/acervo/detalhe/1220752
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.source.none.fl_str_mv reponame:Repositório da Produção Científica e Intelectual da Unicamp
instname:Universidade Estadual de Campinas (UNICAMP)
instacron:UNICAMP
instname_str Universidade Estadual de Campinas (UNICAMP)
instacron_str UNICAMP
institution UNICAMP
reponame_str Repositório da Produção Científica e Intelectual da Unicamp
collection Repositório da Produção Científica e Intelectual da Unicamp
repository.name.fl_str_mv Repositório da Produção Científica e Intelectual da Unicamp - Universidade Estadual de Campinas (UNICAMP)
repository.mail.fl_str_mv reposip@unicamp.br
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