Stegmaier, Katja ; Fleissner, Arne ; Janning, Helga ; Yampolskii, Sergey ; Melzer, Christian ; Seggern, Heinz von (2011)
Influence of electrical fatigue on hole transport in poly(p-phenylenevinylene)-based organic light-emitting diodes.
In: Journal of Applied Physics, 110 (3)
doi: 10.1063/1.3610381
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The hole transport in poly(p-phenylenevinylene) (PPV) was investigated before and after bipolar electrical stress by the time-of-flight (TOF) method. Bipolar structures similar to organic light emitting diodes (OLEDs) were realized, yet with much thicker layers than usually prevailing in OLEDs. During fatigue, the hole mobility is reduced, the field dependence of the mobility is increased, and the hole transport becomes more and more dispersive. These results go along with the fatigue behavior of thin film OLEDs that were investigated by charge extraction via linearly increasing voltage (CELIV). Even though theoretical simulations could show that both thick- and thin-film PPV-based OLED structures are dominated by holes, the presented results indicate that the existence of electrons leads to degradation during hole transport. A possible reason for an enlarged electron density in the otherwise hole dominated device is suggested.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2011 |
| Autor(en): | Stegmaier, Katja ; Fleissner, Arne ; Janning, Helga ; Yampolskii, Sergey ; Melzer, Christian ; Seggern, Heinz von |
| Art des Eintrags: | Bibliographie |
| Titel: | Influence of electrical fatigue on hole transport in poly(p-phenylenevinylene)-based organic light-emitting diodes |
| Sprache: | Deutsch |
| Publikationsjahr: | 2011 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 110 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.1063/1.3610381 |
| Kurzbeschreibung (Abstract): | The hole transport in poly(p-phenylenevinylene) (PPV) was investigated before and after bipolar electrical stress by the time-of-flight (TOF) method. Bipolar structures similar to organic light emitting diodes (OLEDs) were realized, yet with much thicker layers than usually prevailing in OLEDs. During fatigue, the hole mobility is reduced, the field dependence of the mobility is increased, and the hole transport becomes more and more dispersive. These results go along with the fatigue behavior of thin film OLEDs that were investigated by charge extraction via linearly increasing voltage (CELIV). Even though theoretical simulations could show that both thick- and thin-film PPV-based OLED structures are dominated by holes, the presented results indicate that the existence of electrons leads to degradation during hole transport. A possible reason for an enlarged electron density in the otherwise hole dominated device is suggested. |
| Freie Schlagworte: | conducting polymers, electron density, fatigue, hole mobility, organic light emitting diodes, organic semiconductors, time of flight spectra |
| Zusätzliche Informationen: | SFB 595 Cooperation C5, D4 |
| Fachbereich(e)/-gebiet(e): | DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > C - Modellierung > Teilprojekt C5: Phänomenologische Modellierung von Injektion, Transport und Rekombination in Bauelementen aus organischen Halbleitern sowie aus nichtorganischen Ferroelektrika DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > D - Bauteileigenschaften DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > D - Bauteileigenschaften > Teilprojekt D4: Betriebsbedingte Ermüdung von Bauelementen aus organischen Halbleitern DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > C - Modellierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 12 Sep 2011 13:29 |
| Letzte Änderung: | 05 Mär 2013 09:54 |
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