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Title: Time-resolved photoluminescence study of CdSe/CdMnS/CdS core/multi-shell nanoplatelets
Authors: Murphy, J. R.
Zhang, P.
Norden, T.
Thomay, T.
Cartwright, A. N.
Demir, Hilmi Volkan
Petrou, A.
Delikanli, Savas
Scrace, T.
Keywords: Photoluminescence
Issue Date: 2016
Source: Murphy, J. R., Delikanli, S., Scrace, T., Zhang, P., Norden, T., Thomay, T., et al. (2016). Time-resolved photoluminescence study of CdSe/CdMnS/CdS core/multi-shell nanoplatelets. Applied Physics Letters, 108(24), 242406-.
Series/Report no.: Applied Physics Letters
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: 0003-6951
DOI: 10.1063/1.4953840
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Research Centres: LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays 
Rights: © 2016 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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