Time-resolved Forster energy transfer in molecular and polymeric guest-host systems

Arthur Dogariu, Rahul Gupta, Alan J. Heeger, Hailiang Wang, Hideyuki Murata, Zakya H. Kafafi

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


Sub-picosecond spectroscopy and ultrafast pump-probe experiments spectrally and temporally resolve the Forster energy transfer in blends from larger gap host to the smaller gap guest organic materials. The dynamics of the stimulated emission and photoinduced absorption of the polymer blends indicate that 1020 ps are required for complete energy transfer. The Forster interaction ranges suggested by quantitative measurements of energy transfer rates are compared with the theoretical values as calculated from the spectral overlap. We discuss the effect of the excited state delocalization. The energy transfer dynamics in small organic molecule blends have a longer time scale (1 ns), corresponding to the much longer lifetimes of the organic dyes.

Original languageEnglish (US)
Pages (from-to)38-46
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1999 Organic Light-Emitting Materials and Devices III - Denver, CO, USA
Duration: Jul 19 1999Jul 21 1999

All Science Journal Classification (ASJC) codes

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


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