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      Quantum efficiency enhancement in film by making nanoparticles of polyfluorene

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      Author
      Huyal, I. O.
      Ozel, T.
      Tuncel, D.
      Demir, Hilmi Volkan
      Date
      2008
      Source Title
      Optics Express
      Print ISSN
      1094-4087
      Publisher
      Optical Society of America
      Volume
      16
      Issue
      17
      Pages
      13391 - 13397
      Language
      English
      Type
      Article
      Item Usage Stats
      137
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      Abstract
      We report on conjugated polymer nanoparticles of polyfluorene that were formed to exhibit higher fluorescence quantum efficiency in film (68%) and reduce undesired emission peak wavelength shifts in film (by 20 nm), compared to the solid-state polymer thin film made directly out of the same polymer solution without forming nanoparticles. Using the facile reprecipitation method, solutions of poly[9,9-dihexyl-9H-fluorene] in THF were added at different volume ratios to obtain different size distributions of nanoparticle dispersions in water. This allowed us to control the sizedependent optical emission of our polyfluorene nanoparticles. Such organic nanoparticles hold great promise for use as efficient emitters in optoelectronic device applications. (C) 2008 Optical Society of America.
      Keywords
      Conjugated Polymer Nanoparticles
      Light-emitting Diode
      Energy-transfer
      Fluorescence
      Relaxation
      Dynamics
      Blends
      Permalink
      http://hdl.handle.net/11693/11626
      Published Version (Please cite this version)
      http://dx.doi.org/10.1364/OE.16.013391
      Collections
      • Department of Chemistry 594
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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