Energy transfer and excitation migration in a doped organic semiconductor

Paul A. Lane, Mason A. Wolak, Joseph S. Melinger, Rachel Williamson, Leonidas C. Palilis, Jared Delcamp, John E. Anthony, Zakya H. Kafafi

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations


We have studied energy transfer to a dioxolane-substituted pentacene derivative, 6, 14-bis-(triisopropylsilylethynyl)-1,3,9,11-tetraoxa- dicyclopenta[b,m]pentacene (TP-5), from tris(8-hydroxyquin-8-olinato) aluminum(III) (Alq 3) by steady state and time-resolved photoluminescence (PL) spectroscopy. The Förster transfer radius is 27 Å, calculated from the fluorescence spectrum of Alq 3 and the absorption spectrum of TP-5. We find that pentacene emission dominates the PL spectra of TP-5:Alq 3 guest-host films, even at concentrations where the typical guest separation is significantly larger than the Förster transfer radius. Monte Carlo simulations of energy transfer to randomly dispersed guest molecules in the host matrix show that Förster-type energy transfer cannot completely account for the PL dynamics of the guest and host. Exciton diffusion within the Alq 3 host followed by fluorescence of the host molecules or energy transfer to the guest explains the PL spectra and dynamics.

Original languageEnglish
Article number593709
Pages (from-to)1-10
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2005
EventOrganic Light-Emitting Materials and Devices IX - San Diego, CA, United States
Duration: Jul 31 2005Aug 3 2005


  • Energy transfer
  • Exciton migration
  • Fluorescence
  • Fo̊rster theory
  • Pentacene
  • Photoluminescence

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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