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Author Murphy, J. R. ♦ Delikanli, S. ♦ Demir, H. V. ♦ Scrace, T. ♦ Zhang, P. ♦ Norden, T. ♦ Petrou, A. ♦ Thomay, T. ♦ Cartwright, A. N.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ABSORPTION SPECTRA ♦ CADMIUM SELENIDES ♦ CADMIUM SULFIDES ♦ INTERFACES ♦ NANOSTRUCTURES ♦ PHOTOLUMINESCENCE ♦ POLARIZATION ♦ PULSES ♦ RECOMBINATION ♦ SPECTROSCOPY ♦ TIME RESOLUTION
Abstract We used photoluminescence spectroscopy to resolve two emission features in CdSe/CdMnS/CdS and CdSe/CdS core/multi-shell nanoplatelet heterostructures. The photoluminescence from the magnetic sample has a positive circular polarization with a maximum centered at the position of the lower energy feature. The higher energy feature has a corresponding signature in the absorption spectrum; this is not the case for the low-energy feature. We have also studied the temporal evolution of these features using a pulsed-excitation/time-resolved photoluminescence technique to investigate their corresponding recombination channels. A model was used to analyze the temporal dynamics of the photoluminescence which yielded two distinct timescales associated with these recombination channels. The above results indicate that the low-energy feature is associated with recombination of electrons with holes localized at the core/shell interfaces; the high-energy feature, on the other hand, is excitonic in nature with the holes confined within the CdSe cores.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-06-13
Publisher Place United States
Journal Applied Physics Letters
Volume Number 108
Issue Number 24


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