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2011 | 120 | 5 | 870-873
Article title

CdSe/ZnS Colloidal Quantum Dots with Alloyed Core/Shell Interfaces: A Photoluminescence Dynamics Study

Content
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EN
Abstracts
EN
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.
Keywords
EN
Publisher

Year
Volume
120
Issue
5
Pages
870-873
Physical description
Dates
published
2011-11
Contributors
  • Department of Physics, University of Texas at Austin, Austin TX 78712, USA
  • Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland
author
  • Department of Physics, University of Texas at Austin, Austin TX 78712, USA
author
  • Department of Physics, University of Texas at Austin, Austin TX 78712, USA
author
  • Department of Physics, University of Texas at Austin, Austin TX 78712, USA
author
  • National Center for Nanoscience and Technology, 100190 Beijing, P.R. China
author
  • National Center for Nanoscience and Technology, 100190 Beijing, P.R. China
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv120n513kz
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