Journal
APPLIED PHYSICS LETTERS
Volume 82, Issue 12, Pages 1965-1967Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1563305
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Enhanced photoluminescence (PL) is reported from Mn2+-doped CdS nanocrystals capped with ZnS (CdS:Mn/ZnS core/shell) that were prepared using a reverse micelle route. Compared to organically (n-dodecanethiol) capped CdS:Mn nanocrystals, CdS:Mn/ZnS core/shell nanocrystals exhibited much stronger and sharper Mn2+ T-4(1)-(6)A(1) yellow PL emission. This is presumably the result of effective passivation of CdS surface states by the ZnS shell and consequent suppression of nonradiative recombination transitions. The core/shell nanostructure was confirmed using x-ray photoelectron spectroscopy and energy dispersive spectroscopy data. (C) 2003 American Institute of Physics.
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