Radiative and Non-radiative Recombination Processes in Photoexcited Poly(p-phenylene vinylene)

  • D. D. C. Bradley
  • R. K. Friend
  • K. S. Wong
  • W. Hayes
  • H. Lindenberger
  • S. Roth
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 76)


In this paper we report studies of the luminescence from photoexcited poly(p-phenylene vinylene) [PPV]. A strong decrease in the yield and lifetime is observed as the extent of unsaturation is increased by thermal conversion from the precursor to fully converted PPV. Such behaviour can be explained by non-radiative recombination processes that compete with the luminescence and which become increasingly efficient as the conjugation length increases. The non-radiative decay is separated into monomolecular and bimolecular components both of which are seen to increase with conjugation length; with the latter of greater relative importance for the more highly converted samples. The monomolecular component appears consistent with recent theoretical treatments whilst the origin of the bimolecular component is at present unclear.


Charge Separation Thermal Conversion Conjugation Length Excitation Density Luminescence Emission 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • D. D. C. Bradley
    • 1
  • R. K. Friend
    • 1
  • K. S. Wong
    • 2
  • W. Hayes
    • 2
  • H. Lindenberger
    • 3
  • S. Roth
    • 3
  1. 1.Cavendish LaboratoryCambridgeUK
  2. 2.Clarendon LaboratoryOxfordUK
  3. 3.Max-Planck-Institut für FestkörperforschungStuttgart 80Fed.Rep.of Germany

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