Titel: Simulation of OLEDs with a polar electron transport layer
Autoren: Altazin, S.
Züfle, Simon
Knapp, Evelyne
Kirsch, Christoph
Schmidt, T.D.
Jäger, L.
Noguchi, Y.
Brütting, W.
Ruhstaller, Beat
Erschienen in: Organic Electronics
Band(Heft): 39
Seiten: 244
Seiten bis: 249
Verlag / Hrsg. Institution: Elsevier
Erscheinungsdatum: Dez-2016
Lizenz (gemäss Verlagsvertrag): Lizenz gemäss Verlagsvertrag
Art der Begutachtung: Peer review (Publikation)
Sprache: Englisch
Fachgebiet (DDC): 621.3: Elektrotechnik und Elektronik
Zusammenfassung: Organic light-emitting diodes (OLEDs) rely on the use of functional materials with suitable energy levels and mobilities for selective charge carrier injection and transport of one species only at the respective electrode. Until recently, however, the dipolar nature of many organic semiconductors has been largely ignored in this context. In particular, electron transports layers (ETLs) often exhibit spontaneous orientation polarization leading to interfacial charges that modify the electrical potential landscape inside a hetero-layer device. Here we demonstrate that the effect of polar ETLs can be simulated using the well-established Poisson and drift-diffusion formalism, if these interfacial charges are taken into account. Impedance spectroscopy is used in order to validate our approach and to characterize the polarity of the material. Finally, simulations allow to quantify the impact of polar ETLs on device performance.
Departement: School of Engineering
Organisationseinheit: Institute of Computational Physics (ICP)
Publikationstyp: Beitrag in wissenschaftlicher Zeitschrift
DOI: 10.1016/j.orgel.2016.10.014
ISSN: 1566-1199
URI: https://digitalcollection.zhaw.ch/handle/11475/2768
Enthalten in den Sammlungen:Publikationen School of Engineering

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