Electron-vibrational relaxation of photoexcited polyfluorenes in the presence of chemical defects: A theoretical study

Ignacio Franco, Sergei Tretiak

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

A quantum chemical semiempirical investigation of electron-vibrational dynamics of photoexcited conjugated polyfluorenes shows that delocalized electronic excitations dominate the absorption, whereas chemical defects (if present) dramatically impact the emission by trapping the photogenerated exciton into a localized state and acting as guest emitters at recombination. These results offer theoretical insight into the effect of non-quenching defect sites in conjugated polymers and explain the origin of a controversial low energy emission band frequently observed in bulk polyfluorene samples.

Original languageEnglish
Pages (from-to)403-408
Number of pages6
JournalChemical Physics Letters
Volume372
Issue number3-4
DOIs
Publication statusPublished - 29 Apr 2003
Externally publishedYes

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