Two-step field-induced singlet dissociation in a fluorene trimer (Articolo in rivista)

Type
Label
  • Two-step field-induced singlet dissociation in a fluorene trimer (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.71.155207 (literal)
Alternative label
  • J. Cabanillas-Gonzalez(1); M. R. Antognazza(1);T. Virgili(1), G. Lanzani(1); C. Gadermaier(2); M. Sonntag(3); P. Strohriegl(3) (2005)
    Two-step field-induced singlet dissociation in a fluorene trimer
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • J. Cabanillas-Gonzalez(1); M. R. Antognazza(1);T. Virgili(1), G. Lanzani(1); C. Gadermaier(2); M. Sonntag(3); P. Strohriegl(3) (literal)
Pagina inizio
  • 155207 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://link.aps.org/doi/10.1103/PhysRevB.71.155207 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 71 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1)IFN-CNR, Dipartimento di Fisica, ULTRAS-INFM, Politecnico di Milano, Milano 20133, Italy (2)Christian-Doppler Laboratory Advanced Functional Materials, Institut für Festkörperphysic, Tech. Univ. Graz, Petersgrasse 16, 8010 Graz, Austria (3)Lehrstuhl Makromolekulare Chemie I, Univesität Bayreuth, 95440 Bayreuth, Germany (literal)
Titolo
  • Two-step field-induced singlet dissociation in a fluorene trimer (literal)
Abstract
  • We time resolve the event of singlet separation into free carriers in an oligofluorene using femtosecond field assisted pump-probe technique. Steady state photoinduced absorption (PA) measurements have also been employed to identify triplet absorption (T1 -Tn) in the spectral region of 1.8 eV. As a result of an applied electric field of 2.2 MV/cm singlets are observed to undergo a dissociation process consisting of first singlet splitting into bound polaron pairs and second further dissociation of polaron pairs into free carriers. Subsequent free carrier recombination yields a new population of singlets and triplets. Our results suggest that nongeminate recombination leads to the formation of 35% singlets and 65% triplets. (literal)
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