| DOI | Trouver le DOI : https://doi.org/10.1166/jnn.2011.4311 |
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| Auteur | Rechercher : Rowell, Nelson L.1; Rechercher : Lockwood, David J.1; Rechercher : Amiard, Guillaume; Rechercher : Favre, Luc; Rechercher : Ronda, Antoine; Rechercher : Berbezier, Isabelle; Rechercher : Faustini, Marco; Rechercher : Grosso, David |
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| Affiliation | - Conseil national de recherches du Canada. Science des mesures et étalons
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| Format | Texte, Article |
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| Sujet | Dot diameter; Dot size; Emission efficiencies; Energy dependent; Ge dots; Mesoporous TiO; Mesoporous titanium dioxide; Nanodots; Near-infrared bands; Peak energy; Photoluminescence efficiency; PL bands; PL spectra; Porous TiO; Self-assembled; Si(0 0 1); Theoretical models; Tight binding; Atomic force microscopy; Germanium; Molecular beam epitaxy; Photoluminescence; Self assembly; Titanium dioxide; Size distribution |
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| Résumé | For Ge nanodots ∼20 nm in diameter grown by annealing a thin amorphous Ge layer deposited by molecular beam epitaxy on a mesoporous TiO 2 layer on Si(001), photoluminescence (PL) was observed as a wide near-infrared band near 800 meV. Using a tight binding theoretical model, the energy-dependent PL spectrum was transformed into a dependence on dot size. The average dot size determined the peak energy of the PL band and its shape depended on the size distribution, including bandgap enlargement due to quantum confinement. Combining the dot sample PL with an established dependence of emission efficiency on dot diameter, it was possible to derive a dot size distribution and compare it with results obtained independently from atomic force microscopy. Copyright © 2011 American Scientific Publishers. All rights reserved. |
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| Date de publication | 2011 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21271634 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 8c05c494-865e-4f78-bfac-3e8ded5313d3 |
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| Enregistrement créé | 2014-03-24 |
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| Enregistrement modifié | 2020-04-21 |
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