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      Structural tuning of color chromaticity through nonradiative energy transfer by interspacing CdTe nanocrystal monolayers

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      Author
      Cicek, N.
      Nizamoglu, S.
      Ozel, T.
      Mutlugun, E.
      Karatay, D. U.
      Lesnyak, V.
      Otto, T.
      Gaponik N.
      Eychmuller, A.
      Demir, Hilmi Volkan
      Date
      2009-02-09
      Source Title
      Applied Physics Letters
      Print ISSN
      0003-6951
      Publisher
      American Institute of Physics
      Volume
      94
      Issue
      6
      Pages
      061105-1 - 061105-3
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We proposed and demonstrated architectural tuning of color chromaticity by controlling photoluminescence decay kinetics through nonradiative Forster resonance energy transfer in the heterostructure of layer-by-layer spaced CdTe nanocrystal (NC) solids. We achieved highly sensitive tuning by precisely adjusting the energy transfer efficiency from donor NCs to acceptor NCs via controlling interspacing between them at the nanoscale. By modifying decay lifetimes of donors from 12.05 to 2.96 ns and acceptors from 3.68 to 14.57 ns, we fine-tuned chromaticity coordinates from (x,y)=(0.575,0.424) to (0.632, 0.367). This structural adjustment enabled a postsynthesis color tuning capability, alternative or additive to using the size, shape, and composition of NCs.
      Keywords
      Cadmium compounds
      Colour
      Ii-vi semiconductors
      Nanostructured materials
      Optical tuning
      Photoluminescence
      Permalink
      http://hdl.handle.net/11693/11738
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.3079679
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
      • Nanotechnology Research Center (NANOTAM) 1006
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