Time-resolved luminescence measurements in poly(p-phenylenevinylene)

I. D W Samuel, B. Crystall, Gary Rumbles, P. L. Burn, A. B. Holmes, R. H. Friend

Research output: Contribution to journalArticlepeer-review

81 Citations (Scopus)

Abstract

We report time-resolved measurements of photoluminescence in poly(p-phenylenevinylene) (PPV) and related polymers, using the technique of time-correlated single photon counting. We find the photoluminescence is longer lived in less-conjugated samples, and that this accounts for the higher efficiency of light-emitting devices made from less-conjugated materials. At low temperatures, the luminescence is longer lived, and at 77 K there is an interesting red shift of the emission during the first nanoseconds after photoexcitation. We consider that this arises from migration of excitons to more-conjugated (and therefore lower energy) regions of the sample.

Original languageEnglish
Pages (from-to)281-288
Number of pages8
JournalSynthetic Metals
Volume54
Issue number1-3
DOIs
Publication statusPublished - Mar 1 1993

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

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