title: Charge injection and transport properties of an organic light-emitting diode.
abstract: The charge behavior of organic light emitting diode (OLED) is investigated by steady-state current-voltage technique and impedance spectroscopy at various temperatures to obtain activation energies of charge injection and transport processes. Good agreement of activation energies obtained by steady-state and frequency-domain was used to analyze their contributions to the charge injection and transport. We concluded that charge is injected into the OLED device mostly through the interfacial states at low voltage region, whereas the thermionic injection dominates in the high voltage region. This comparison of experimental techniques demonstrates their capabilities of identification of major bottleneck of charge injection and transport.
authors.affiliation: Slovak University of Technology, Ilkovicova 3, Bratislava 81219, Slovakia.
authors.forename: Peter
authors.initials: P
authors.lastname: Juhasz
authors.affiliation: Slovak University of Technology, Ilkovicova 3, Bratislava 81219, Slovakia.
authors.forename: Juraj
authors.initials: J
authors.lastname: Nevrela
authors.affiliation: Slovak University of Technology, Ilkovicova 3, Bratislava 81219, Slovakia.
authors.forename: Michal
authors.initials: M
authors.lastname: Micjan
authors.affiliation: Slovak University of Technology, Ilkovicova 3, Bratislava 81219, Slovakia.
authors.forename: Miroslav
authors.initials: M
authors.lastname: Novota
authors.affiliation: Slovak University of Technology, Ilkovicova 3, Bratislava 81219, Slovakia.
authors.forename: Jan
authors.initials: J
authors.lastname: Uhrik
authors.affiliation: Slovak University of Technology, Ilkovicova 3, Bratislava 81219, Slovakia.
authors.forename: Lubica
authors.initials: L
authors.lastname: Stuchlikova
authors.affiliation: Slovak University of Technology, Ilkovicova 3, Bratislava 81219, Slovakia.
authors.forename: Jan
authors.initials: J
authors.lastname: Jakabovic
authors.affiliation: Slovak University of Technology, Ilkovicova 3, Bratislava 81219, Slovakia.
authors.forename: Ladislav
authors.initials: L
authors.lastname: Harmatha
authors.affiliation: Slovak University of Technology, Ilkovicova 3, Bratislava 81219, Slovakia.
authors.forename: Martin
authors.initials: M
authors.lastname: Weis
keywords: activation energy; impedance spectroscopy; organic light-emitting device