Ultrafast carrier dynamics on conjugated poly(3-hexylthiophene)/[6,6]- phenyl C61 -butyric acid methyl ester composites

Emmanouil Lioudakis, Andreas Othonos, Ioannis Alexandrou, Yasuhiko Hayashi

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The authors have studied ultrafast carrier dynamics on poly(3- hexylthiophene)/[6,6]- phenyl C61 -butyric acid methyl ester (PCBM) composites up to 50% PCBM concentration. They have resolved the exciton intraband relaxation of composites as well as the subsequent electron/polaron relaxation of dissociated excitons. The observed fast time constant of intraband relaxation is found to be 0.5-1.5 ps, whereas the second long-live relaxation (0.5-1 ns) is strongly fullerene related. A wavelength dependent ultrafast study is performed giving fundamental information on the nonradiative exciton relaxation, exciton dissociation, and electron relaxation of PCBM-related states.

Original languageEnglish
Article number111117
JournalApplied Physics Letters
Volume91
Issue number11
DOIs
Publication statusPublished - 2007
Externally publishedYes

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butyric acid
esters
composite materials
excitons
time constant
fullerenes
electrons
dissociation
wavelengths

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Ultrafast carrier dynamics on conjugated poly(3-hexylthiophene)/[6,6]- phenyl C61 -butyric acid methyl ester composites. / Lioudakis, Emmanouil; Othonos, Andreas; Alexandrou, Ioannis; Hayashi, Yasuhiko.

In: Applied Physics Letters, Vol. 91, No. 11, 111117, 2007.

Research output: Contribution to journalArticle

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