Details
| Original language | English |
|---|---|
| Pages (from-to) | 223-228 |
| Number of pages | 6 |
| Journal | Chemical Physics Letters |
| Volume | 339 |
| Issue number | 3-4 |
| Publication status | Published - 9 May 2001 |
Abstract
Time-resolved fluorescence spectroscopy is used to investigate relaxation of electronic excitations in films of a π-conjugated polyfluorene polymer in the ps time domain. Results are consistent with theoretical predictions based on a model for relaxation of the excitations by incoherent hopping between localized states through Förster type energy transfer with a Förster radius R0~20 Å. Excitons created by a photon with an energy <2.92 eV are found to remain immobile during their lifetime. In addition the measurements indicate that for excitation energies 2.94 eV additional relaxation processes, ascribed to ultrafast intrachain vibrational relaxation, are operative.
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In: Chemical Physics Letters, Vol. 339, No. 3-4, 09.05.2001, p. 223-228.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Time-resolved fluorescence studies and Monte Carlo simulations of relaxation dynamics of photoexcitations in a polyfluorene film
AU - Meskers, Stefan C.J.
AU - Hübner, Jens
AU - Oestreich, Michael
AU - Bässler, Heinz
N1 - Funding information: We gratefully acknowledge financial support from SELOA (S.M.), the Sonderforschungsbereich 383, and the Fond der chemischen Industrie. We thank Prof. U. Scherf (University of Potsdam) for providing us with the polyfluorene and we appreciate the help from Prof. W.W. Rühle.
PY - 2001/5/9
Y1 - 2001/5/9
N2 - Time-resolved fluorescence spectroscopy is used to investigate relaxation of electronic excitations in films of a π-conjugated polyfluorene polymer in the ps time domain. Results are consistent with theoretical predictions based on a model for relaxation of the excitations by incoherent hopping between localized states through Förster type energy transfer with a Förster radius R0~20 Å. Excitons created by a photon with an energy <2.92 eV are found to remain immobile during their lifetime. In addition the measurements indicate that for excitation energies 2.94 eV additional relaxation processes, ascribed to ultrafast intrachain vibrational relaxation, are operative.
AB - Time-resolved fluorescence spectroscopy is used to investigate relaxation of electronic excitations in films of a π-conjugated polyfluorene polymer in the ps time domain. Results are consistent with theoretical predictions based on a model for relaxation of the excitations by incoherent hopping between localized states through Förster type energy transfer with a Förster radius R0~20 Å. Excitons created by a photon with an energy <2.92 eV are found to remain immobile during their lifetime. In addition the measurements indicate that for excitation energies 2.94 eV additional relaxation processes, ascribed to ultrafast intrachain vibrational relaxation, are operative.
UR - http://www.scopus.com/inward/record.url?scp=0000674527&partnerID=8YFLogxK
U2 - 10.1016/S0009-2614(01)00328-1
DO - 10.1016/S0009-2614(01)00328-1
M3 - Article
AN - SCOPUS:0000674527
VL - 339
SP - 223
EP - 228
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 3-4
ER -