• About
  • Policies
  • What is open access
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Engineering
      • Department of Electrical and Electronics Engineering
      • View Item
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Engineering
      • Department of Electrical and Electronics Engineering
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Temperature-dependent emission kinetics of colloidal semiconductor nanoplatelets strongly modified by stacking

      Thumbnail
      View / Download
      2.6 Mb
      Author(s)
      Erdem, O.
      Olutas M.
      Guzelturk, B.
      Kelestemur Y.
      Demir, Hilmi Volkan
      Date
      2016
      Source Title
      Journal of Physical Chemistry Letters
      Print ISSN
      1948-7185
      Publisher
      American Chemical Society
      Volume
      7
      Issue
      3
      Pages
      548 - 554
      Language
      English
      Type
      Article
      Item Usage Stats
      201
      views
      377
      downloads
      Abstract
      We systematically studied temperature-dependent emission kinetics in solid films of solution-processed CdSe nanoplatelets (NPLs) that are either intentionally stacked or nonstacked. We observed that the steady-state photoluminescence (PL) intensity of nonstacked NPLs considerably increases with decreasing temperature, whereas there is only a slight increase in stacked NPLs. Furthermore, PL decay time of the stacked NPL ensemble is comparatively much shorter than that of the nonstacked NPLs, and this result is consistent at all temperatures. To account for these observations, we developed a probabilistic model that describes excitonic processes in a stack using Markov chains, and we found excellent agreement between the model and experimental results. These findings develop the insight that the competition between the radiative channels and energy transfer-assisted hole trapping leads to weakly temperature-dependent PL intensity in the case of the stacked NPL ensembles as compared to the nonstacked NPLs lacking strong energy transfer. This study shows that it is essential to account for the effect of NPL stacking to understand their resulting PL emission properties.
      Keywords
      Markov processes
      Colloidal semiconductors
      Kinetics in solids
      Nano-platelets
      Photoluminescence intensities
      Probabilistic modeling
      Radiative channels
      Solution-processed
      Temperature dependent
      Energy transfer
      Permalink
      http://hdl.handle.net/11693/36736
      Published Version (Please cite this version)
      http://dx.doi.org/10.1021/acs.jpclett.5b02763
      Collections
      • Department of Electrical and Electronics Engineering 4011
      • Department of Physics 2550
      • Institute of Materials Science and Nanotechnology (UNAM) 2258
      Show full item record

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsCoursesThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsCourses

      My Account

      Login

      Statistics

      View Usage StatisticsView Google Analytics Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 2976
      © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy