Ultrafast dynamics of photoexcitations in conjugated polymers

GR Hayes, Ifor David William Samuel, RT Phillips

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21 Citations (Scopus)


Measurements are reported of the time-resolved photoluminescence (PL) from unoriented films of poly(p-phenylenevinylene) [PPV], poly[2-methoxy,5-(2'-ethyl-hexyloxy)-p-phenylenevinylene] [MEH-PPV] and a cyano-substituted derivative of PPV, CN-PPV. The PL features observed for PPV and MEH-PPV are consistent with the ultrafast formation and subsequent energy migration of intrachain excitons followed by their decay through radiative and non-radiative processes. The dynamics of the PL in CN-PPV is substantially altered compared to that of PPV and MEH-PPV films and also to that of CN-PPV in solution. A transient high energy feature is observed that is not seen in continuous-wave (CW) measurements and a long-lived low energy feature which corresponds to the CW PL. These results are consistent with the formation of inter-chain excitations in CN-PPV films.

Original languageEnglish
Pages (from-to)889
Number of pages889
JournalSynthetic Metals
Publication statusPublished - Jan 1997


  • time-resolved fast spectroscopy
  • poly(phenylenevinylene) and derivatives
  • semiconducting films


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