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dc.contributor.authorFröbel, M.
dc.contributor.authorHofmann, S.
dc.contributor.authorLeo, K.
dc.contributor.authorGather, M.C.
dc.date.accessioned2014-08-29T15:01:01Z
dc.date.available2014-08-29T15:01:01Z
dc.date.issued2014-02-17
dc.identifier.citationFröbel , M , Hofmann , S , Leo , K & Gather , M C 2014 , ' Optimizing the internal electric field distribution of alternating current driven organic light-emitting devices for a reduced operating voltage ' , Applied Physics Letters , vol. 104 , no. 7 , 071105 . https://doi.org/10.1063/1.4865928en
dc.identifier.issn0003-6951
dc.identifier.otherPURE: 112455450
dc.identifier.otherPURE UUID: e15ff39e-8b04-44ed-91ce-ed3af6d4d8c8
dc.identifier.otherScopus: 84897412967
dc.identifier.otherWOS: 000332038500005
dc.identifier.otherORCID: /0000-0002-4857-5562/work/47136493
dc.identifier.urihttps://hdl.handle.net/10023/5298
dc.descriptionThis work was funded with financial means of the European Social Fund and the Free State of Saxony through the OrthoPhoto project.en
dc.description.abstractThe influence of the thickness of the insulating layer and the intrinsic organic layer on the driving voltage of p-i-n based alternating current driven organic light-emitting devices (AC-OLEDs) is investigated. A three-capacitor model is employed to predict the basic behavior of the devices, and good agreement with the experimental values is found. The proposed charge regeneration mechanism based on Zener tunneling is studied in terms of field strength across the intrinsic organic layers. A remarkable consistency between the measured field strength at the onset point of light emission (3-3.1 MV/cm) and the theoretically predicted breakdown field strength of around 3 MV/cm is obtained. The latter value represents the field required for Zener tunneling in wide band gap organic materials according to Fowler-Nordheim theory. AC-OLEDs with optimized thickness of the insulating and intrinsic layers show a reduction in the driving voltage required to reach a luminance of 1000 cd/m2 of up to 23% (8.9 V) and a corresponding 20% increase in luminous efficacy.
dc.format.extent5
dc.language.isoeng
dc.relation.ispartofApplied Physics Lettersen
dc.rights© 2014 AIP Publishing LLCen
dc.subjectQC Physicsen
dc.subject.lccQCen
dc.titleOptimizing the internal electric field distribution of alternating current driven organic light-emitting devices for a reduced operating voltageen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Biomedical Sciences Research Complexen
dc.identifier.doihttps://doi.org/10.1063/1.4865928
dc.description.statusPeer revieweden


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