Auger Recombination Suppression in Nanocrystals with Asymmetric Electron–Hole Confinement
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comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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http://dx.doi.org/ 10.1002/smll.201101740 |
Metadata
Title
Auger Recombination Suppression in Nanocrystals with Asymmetric Electron–Hole ConfinementDate
2012Publisher
WILEY-VCH VerlagISSN
1613-6810Bibliographic citation
Small, 8, 5, p. 754–759Type
info:eu-repo/semantics/articlePublisher version
http://onlinelibrary.wiley.com/doi/10.1002/smll.201101740/abstractVersion
info:eu-repo/semantics/publishedVersionSubject
Abstract
Type II and quasi-type II nanocrystals with thick shells exhibit reduced blinking. However, after a number of monolayers, the influence of the shell thickness is found to vanish. Using a two-band Kane Hamiltonian, it ... [+]
Type II and quasi-type II nanocrystals with thick shells exhibit reduced blinking. However, after a number of monolayers, the influence of the shell thickness is found to vanish. Using a two-band Kane Hamiltonian, it is shown that this behavior is a consequence of interband coupling and asymmetric confinement of electrons and holes. Interface alloying provides an additional, order-of-magnitude contribution to the Auger suppression, in agreement with recent experiments. The existence is predicted of critical shell thicknesses that strongly quench Auger processes for any core size. [-]
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Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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