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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/21760

    Título
    Spectrally and spatially resolved cathodoluminescence of undoped/Mg-doped GaN core-shell nanowires: a local probe into activation of Mg acceptors in non-polar and semi-polar crystal faces
    Autor
    Hortelano Santos, VanesaAutoridad UVA
    Martínez Sacristán, ÓscarAutoridad UVA Orcid
    Artús, L.
    Cuscó, R.
    Jiménez López, Juan IgnacioAutoridad UVA Orcid
    Año del Documento
    2016
    Editorial
    IOP Publishing
    Descripción
    Producción Científica
    Documento Fuente
    Nanotechnology, 2016, 27(9), p. 095706
    Abstract
    Spectrally and spatially resolved cathodoluminescence (CL) measurements were carried out at 80 K on undoped/Mg-doped GaN core-shell nanowires grown by selective area growth metalorganic vapor phase epitaxy in order to investigate locally the optical activity of the Mg dopants. A study of the luminescence emission distribution over the different regions of the nanowires is presented. We have investigated the CL fingerprints of the Mg incorporation into the non-polar lateral prismatic facets and the semi-polar facets of the pyramidal tips. The amount of Mg incorporation/activation was varied by using several Mg/Ga flow ratios and post-growth annealing treatments. For lower Mg/Ga flow ratios, the annealed nanowires clearly display a donor-acceptor pair band emission peaking at 3.26-3.27 eV and up to 4 LO phonon replicas, which can be considered as a reliable indicator of effective p-type Mg doping in the nanowire shell. For higher Mg/Ga flow ratios, a substantial enhancement of the yellow luminescence emission as well as several emission subbands are observed, which suggests an increase of disorder and the presence of defects as a consequence of the excess Mg doping,
    Materias (normalizadas)
    Cathodoluminescence
    ISSN
    0957-4484
    Revisión por pares
    SI
    Patrocinador
    Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA302U13)
    Version del Editor
    http://iopscience.iop.org/journal/0957-4484
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/21760
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP32 - Artículos de revista [284]
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    Attribution-NonCommercial-NoDerivatives 4.0 InternationalLa licencia del ítem se describe como Attribution-NonCommercial-NoDerivatives 4.0 International

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