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  • CdSe/ZnS colloidal quantum dots with alloyed core/shell interfaces: A photoluminescence dynamics study

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    DziatkowskiPUB2084.pdf (917.8Kb)
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    Author(s)
    Dziatkowski, K
    Ratchford, D
    Hartsfield, T
    Li, X
    Gao, Y
    Tang, Z
    Griffith University Author(s)
    Tang, Zhiyong
    Year published
    2011
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    Abstract
    Time-resolved photon counting technique was employed to study dynamics of photoluminescence from the ensemble and single CdSe/ZnS quantum dots with the alloyed core/shell interfaces. The ensemble data revealed enhanced effect of disorder-induced trap states for increasing emission energy, as implied from the changes in the distribution of total decay rates. The emission trajectories collected for single quantum dots showed familiar, two-state blinking pattern. It suggests that in a large-band-offset CdSe/ZnS system, the introduced alloying of the core-to-shell region cannot smooth enough the confinement potential in order ...
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    Time-resolved photon counting technique was employed to study dynamics of photoluminescence from the ensemble and single CdSe/ZnS quantum dots with the alloyed core/shell interfaces. The ensemble data revealed enhanced effect of disorder-induced trap states for increasing emission energy, as implied from the changes in the distribution of total decay rates. The emission trajectories collected for single quantum dots showed familiar, two-state blinking pattern. It suggests that in a large-band-offset CdSe/ZnS system, the introduced alloying of the core-to-shell region cannot smooth enough the confinement potential in order to suppress nonradiative Auger recombination and blinking.
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    Journal Title
    Acta Physica Polonica A
    Volume
    120
    Issue
    5
    DOI
    https://doi.org/10.12693/APhysPolA.120.870
    Copyright Statement
    © 2011 Institute of Physics, Polish Academy of Sciences. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Mathematical sciences
    Applied mathematics not elsewhere classified
    Physical sciences
    Publication URI
    http://hdl.handle.net/10072/173001
    Collection
    • Journal articles

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