Excitons, Biexcitons, and Trions in CdSe Nanorods
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Scholar |
Otros documentos de la autoría: Rajadell Viciano, Fernando; Climente, Juan I.; Planelles, Josep; Bertoni, Andrea
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
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http://dx.doi.org/10.1021/jp902652z |
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Título
Excitons, Biexcitons, and Trions in CdSe NanorodsFecha de publicación
2009Editor
American Chemical SocietyISSN
11268-11272Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/abs/10.1021/jp902652zVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
We calculate the recombination energies and probabilities of neutral excitons (X), singly charged excitons (X±), and biexcitons (XX) in CdSe quantum dots of variable length. For spherical dots the relative position ... [+]
We calculate the recombination energies and probabilities of neutral excitons (X), singly charged excitons (X±), and biexcitons (XX) in CdSe quantum dots of variable length. For spherical dots the relative position of the emission lines is determined by the confinement. As the dot is elongated, however, Coulomb correlation overcomes single-particle effects and the emission line of X becomes more energetic than that of any other excitonic complex. Likewise, the recombination probability (τ−1) of spherical dots is characteristic of the strong confinement regime: τ−1(XX) 2τ−1(X±) 4τ−1(X). However, these ratios are reduced with increasing length, as correlations enhance the emission of each excitonic complex at a different rate. Our results are compared with available experimental data. [-]
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Journal of Physical Chemistry C, 113, 26, p. 11268–11272Derechos de acceso
Copyright © 2009 American Chemical Society
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