Excitons, Biexcitons, and Trions in CdSe Nanorods
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Other documents of the author: Rajadell Viciano, Fernando; Climente, Juan I.; Planelles, Josep; Bertoni, Andrea
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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http://dx.doi.org/10.1021/jp902652z |
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Title
Excitons, Biexcitons, and Trions in CdSe NanorodsDate
2009Publisher
American Chemical SocietyISSN
11268-11272Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/abs/10.1021/jp902652zVersion
info:eu-repo/semantics/publishedVersionAbstract
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. 11268–11272Rights
Copyright © 2009 American Chemical Society
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