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Thermally stimulated luminescence versus thermally stimulated current in organic solids

Arkhipov, V. I. ; Emelianova, E. V. ; Schmechel, Roland ; Seggern, Heinz von :
Thermally stimulated luminescence versus thermally stimulated current in organic solids.
[Online-Edition: http://dx.doi.org/10.1016/j.jnoncrysol.2004.03.056]
In: Journal of non-crystalline solids, 338/34 pp. 626-629.
[Artikel], (2004)
Note:

SFB 595 Cooperation C5, D4

Offizielle URL: http://dx.doi.org/10.1016/j.jnoncrysol.2004.03.056

Kurzbeschreibung (Abstract)

A unified model of hopping thermally stimulated luminescence (TSL) and thermally stimulated current (TSC) in disordered organic semiconductors and polymers is suggested. The differences between photoinduced TSL and TSC, measured on the same sample, are explained by the fact that metastable geminate pairs of charges rather than free carriers are primarily photogenerated in these materials. Since the Coulomb interaction does not prevent carriers from recombining into excitons, the rate-limiting step in the TSL kinetics is carrier release from traps. However, the Coulomb binding energy strongly affects the dissociation of geminate pairs into free charge carriers and, therefore, it changes the apparent activation energy of TSC.

Typ des Eintrags: Artikel
Erschienen: 2004
Autor(en): Arkhipov, V. I. ; Emelianova, E. V. ; Schmechel, Roland ; Seggern, Heinz von
Titel: Thermally stimulated luminescence versus thermally stimulated current in organic solids
Sprache: Englisch
Kurzbeschreibung (Abstract):

A unified model of hopping thermally stimulated luminescence (TSL) and thermally stimulated current (TSC) in disordered organic semiconductors and polymers is suggested. The differences between photoinduced TSL and TSC, measured on the same sample, are explained by the fact that metastable geminate pairs of charges rather than free carriers are primarily photogenerated in these materials. Since the Coulomb interaction does not prevent carriers from recombining into excitons, the rate-limiting step in the TSL kinetics is carrier release from traps. However, the Coulomb binding energy strongly affects the dissociation of geminate pairs into free charge carriers and, therefore, it changes the apparent activation energy of TSC.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of non-crystalline solids
Band: 338/34
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften
Zentrale Einrichtungen > Sonderforschungsbereich 595 > C - Modellierung > C5
Zentrale Einrichtungen > Sonderforschungsbereich 595 > D - Bauteileigenschaften > D4
Zentrale Einrichtungen > Sonderforschungsbereich 595 > C - Modellierung
Zentrale Einrichtungen > Sonderforschungsbereich 595 > D - Bauteileigenschaften
Zentrale Einrichtungen > Sonderforschungsbereich 595
Zentrale Einrichtungen
Hinterlegungsdatum: 20 Nov 2008 08:19
Offizielle URL: http://dx.doi.org/10.1016/j.jnoncrysol.2004.03.056
Zusätzliche Informationen:

SFB 595 Cooperation C5, D4

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