Doped and non-doped organic light-emitting diodes based on a yellow carbazole emitter into a blue-emitting matrix

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dc.creatorChoukri, Hakim
dc.creatorFischer, Alexis
dc.creatorForget, Sebastien
dc.creatorChenais, Sebastien
dc.creatorCastex, Marie-Claude
dc.creatorGeffroy, Bernard
dc.creatorAdes, Dominique
dc.creatorSiove, Alain
dc.date2007-01-19
dc.date2007-03-28
dc.date.accessioned2026-07-07T07:54:09Z
dc.date.available2026-07-07T07:54:09Z
dc.descriptionA new carbazole derivative with a 3,3'-bicarbazyl core 6,6'-substituted by dicyanovinylene groups (6,6'-bis(1-(2,2'-dicyano)vinyl)-N,N'-dioctyl-3,3'-bicarbazyl; named (OcCz2CN)2, was synthesized by carbonyl-methylene Knovenagel condensation, characterized and used as a component of multilayer organic light-emitting diodes (OLEDs). Due to its -donor-acceptor type structure, (OcCz2CN)2 was found to emit a yellow light at max=590 nm (with the CIE coordinates x=0.51; y = 0.47) and was used either as a dopant or as an ultra-thin layer in a blue-emitting matrix of 4,4'-bis(2,2'-diphenylvinyl)-1,1'-biphenyl (DPVBi). DPVBi (OcCz2CN)2-doped structure exhibited, at doping ratio of 1.5 weight %, a yellowish-green light with the CIE coordinates (x = 0.31; y = 0.51), an electroluminescence efficiency EL=1.3 cd/A, an external quantum efficiency ext= 0.4 % and a luminance L= 127 cd/m2 (at 10 mA/cm2) whereas for non-doped devices utilizing the carbazolic fluorophore as a thin neat layer, a warm white with CIE coordinates (x = 0.40; y= 0.43), EL= 2.0 cd/A, ext= 0.7 %, L = 197 cd/m2 (at 10 mA/cm2) and a color rendering index (CRI) of 74, were obtained. Electroluminescence performances of both the doped and non-doped devices were compared with those obtained with 5,6,11,12-tetraphenylnaphtacene (rubrene) taken as a reference of highly efficient yellow emitter.
dc.identifierhttps://arxiv.org/abs/physics/0701228
dc.identifierhttp://arxiv.org/abs/physics/0701228
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/126496
dc.subjectOptics
dc.titleDoped and non-doped organic light-emitting diodes based on a yellow carbazole emitter into a blue-emitting matrix
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