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  Fast field-induced dissociation and recombination of optical excitations in a π-conjugated polymer

Lupton, J. M., Im, C., & Bässler, H. (2003). Fast field-induced dissociation and recombination of optical excitations in a π-conjugated polymer. Journal of Physics D-Applied Physics, 36(10), 1171-1175.

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 Urheber:
Lupton, J. M.1, Autor           
Im, Chan1, Autor           
Bässler, H., Autor
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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 Zusammenfassung: We present time resolved photoluminescence measurements on thin films of a phenyl-substituted poly(phenylene-vinylene) incorporated in a diode structure. Under reverse bias conditions rapid exciton dissociation is observed leading to luminescence quenching by up to 30%. In contrast, under forward bias conditions the initial quenching is substantially reduced due to shielding by space charges. At longer times thermally activated exciton quenching by injected polarons dominates the quenching process. At 3 ns after excitation, the external field is found to enhance the delayed luminescence. We attribute this to increased recombination of spatially correlated charge carrier pairs in the presence of the electric field, which are generated by exciton dissociation by bimolecular annihilation or on defect states.

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Sprache(n): eng - English
 Datum: 2003-05-21
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: eDoc: 56193
ISI: 000183446100003
Anderer: P-03-253
 Art des Abschluß: -

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Titel: Journal of Physics D-Applied Physics
  Alternativer Titel : J. Phys. D-Appl. Phys.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 36 (10) Artikelnummer: - Start- / Endseite: 1171 - 1175 Identifikator: ISSN: 0022-3727