Highly efficient yellow organic light emitting diode based on a layer-cross faded emission layer allowing easy color tuning

Lindla, Florian; Boesing, Manuel; Zimmermann, Christoph; Jessen, Frank; Gemmern, Philipp van; Bertram, D.; Keiper, D.; Meyer, Nico; Heuken, M.; Kalisch, H.; Jansen, R.H.

doi:10.1063/1.3266849

Cited by 27 publications

(18 citation statements)

References 10 publications

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“…Further details about cross-fading can also be found elsewhere. 8 In Fig. 3, the triplet energy levels of the different organic materials and possible triplet exciton diffusion paths are qualitatively shown.…”

Section: Resultsmentioning

confidence: 99%

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Hybrid white organic light-emitting diode with a mixed-host interlayer processed by organic vapor phase deposition

et al. 2011

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Abstract. Organic light-emitting diodes (OLEDs) are a key technology in solid state lighting. Without a long-lived phosphorescent blue emitter, a hybrid concept based on phosphorescent red and green emitters and a fluorescent blue emitter in a white OLED stack is a promising approach for pure-white emission. Several challenges such as exciton recombination on all emitters and triplet diffusion, as well as quenching, have to be overcome. To address these issues, a mixed-host phosphorescent emission layer is employed. The mixture ratio is locally varied in the emission layer. An interlayer separates the phosphorescent and fluorescent emission layer.

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Section: Resultsmentioning

confidence: 99%

“…Previously, phosphorescent two-color yellow OVPD OLED based on a mixed-host emission layer 8 have been investigated in terms of efficacy and color stability. The emission color was easily tunable from red to green while the EQE was constantly high over the whole color range.…”

Section: Introductionmentioning

confidence: 99%

Hybrid white organic light-emitting diode with a mixed-host interlayer processed by organic vapor phase deposition

et al. 2011

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“…[17] In addition, by cross-fading, the current and luminous efficacies could be significantly improved, [17,18,19] even a factor of 2 was observed compared to the monochrome red reference OLED. [19] .…”

Section: Mfc Mfcmentioning

confidence: 99%

Novel solutions for thin film layer deposition for organic materials

et al. 2011

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Innovative systems for carrier-gas enhanced vapor phase deposition of organic layers offer advanced methods for the precise deposition of complex thin-film layer stacks. The approach inherently avoids potential short-comings from solvent-based polymer deposition and offers new opportunities. The process operates at low pressure (thus avoiding complex vacuum setups), and, by employing AIXTRON's extensive experience in freely scalable solutions, can be adapted to virtually any production process and allows for R&D and production systems alike.Deposition of organic layers and stacks recommends the approach for a wide range of organic small molecule and polymer materials (including layers with gradual change of the composition), for conductive layers, for dielectric layers, for barrier systems, for OLED materials, and surface treatments such as oleophobic / hydrophobic coatings.With the combination of other vapor phase deposition solutions, hybrid systems combining organic and inorganic materials and other advanced stacks can be realized.

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“…In this paper, we introduce a gradient doping [9][10][11][12] in HTL to facilitate hole injection and transporting, which is expected to work at electron side as well. With gradient doping, concentration of F 4 -TCNQ is transited from 100 wt% near the anode to 0 wt% near the emission layer in 4,4 -bis [N-(1-naphthyl)-N-phenyl-amino] biphenyl (NPB).…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Hole Injection and Transporting of Organic Light-Emitting Diodes by Utilizing Gradient Doping

Wang

Liu

Huang

et al. 2013

Molecular Crystals and Liquid Crystals

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We demonstrate significant improvement of hole injection and transporting in organic light-emitting diodes (OLEDs) by utilizing gradient doping in hole transporting layer (HTL). An ultrahigh doping concentration at the anode side to enhance the hole injection, whereas low doping concentration close to emission layer to avoid possible quenching of excitons. A plural HTL with concentration step are introduced in between to smooth the hole transporting. Compared to conventional hole injection technologies, the gradient doping significantly enhances the current density and luminance of the OLED.

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Highly efficient yellow organic light emitting diode based on a layer-cross faded emission layer allowing easy color tuning

Abstract: Articles you may be interested inDistinguishing triplet energy transfer and trap-assisted recombination in multi-color organic light-emitting diode with an ultrathin phosphorescent emissive layer

Cited by 27 publications

References 10 publications

Hybrid white organic light-emitting diode with a mixed-host interlayer processed by organic vapor phase deposition

Hybrid white organic light-emitting diode with a mixed-host interlayer processed by organic vapor phase deposition

Novel solutions for thin film layer deposition for organic materials

Enhancing the Hole Injection and Transporting of Organic Light-Emitting Diodes by Utilizing Gradient Doping

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