EP1969653A1 - Diodes electroluminescentes organiques a extraction accrue de lumiere - Google Patents

Diodes electroluminescentes organiques a extraction accrue de lumiere

Info

Publication number
EP1969653A1
EP1969653A1 EP06829325A EP06829325A EP1969653A1 EP 1969653 A1 EP1969653 A1 EP 1969653A1 EP 06829325 A EP06829325 A EP 06829325A EP 06829325 A EP06829325 A EP 06829325A EP 1969653 A1 EP1969653 A1 EP 1969653A1
Authority
EP
European Patent Office
Prior art keywords
transparent
layer
electrode
substrate
oled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06829325A
Other languages
German (de)
English (en)
Inventor
Bernd Fiebranz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merck Patent GmbH
Original Assignee
Merck Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merck Patent GmbH filed Critical Merck Patent GmbH
Publication of EP1969653A1 publication Critical patent/EP1969653A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/854—Arrangements for extracting light from the devices comprising scattering means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C12/00—Powdered glass; Bead compositions
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H05B33/04—Sealing arrangements, e.g. against humidity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/302—Details of OLEDs of OLED structures
    • H10K2102/3023—Direction of light emission
    • H10K2102/3031—Two-side emission, e.g. transparent OLEDs [TOLED]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/331—Nanoparticles used in non-emissive layers, e.g. in packaging layer
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations

Definitions

  • the present invention relates to OLEDs (Organic Light-Emitting Devices) with increased light-outcoupling, processes for their preparation and their use.
  • OLEDs Organic Light-Emitting Devices
  • OLEDs have taken in recent years, rapid development. They are displacing more and more the currently used liquid crystal displays (LCD ' s). Compared to LCD's have the OLEDs several advantages: They are characterized firstly by a simpler structure as well as lower power consumption. In addition, they have a lower viewing angle dependence.
  • the disadvantage 's are their too short lifetimes, specifically for durable applications, such as backlighting of LCD' to the currently available OLED s and general room lighting, necessary.
  • Another approach to increase the service life is to 'increase s, for example, by increasing the light output of OLEDs, the efficiency of OLED's. In this way it is possible to decrease at a constant light output, the current consumption of the OLED's (and thus save energy) or to increase the light output for the same electrical power.
  • the present invention relates to increasing the external output at the substrate / air interface.
  • surface structures can be obtained by means of photolithographic structuring, such as e.g. Micro lens systems and pyramidal structures are applied.
  • a roughening of the surface can be performed.
  • a substrate glass with a higher refractive index n ⁇ 1, 85
  • US 2004/0007969 A1 The coating of the substrate surface with a diffuser layer to improve the external Auskoppeleffizienz.
  • Microparticles is arranged to increase the decoupling.
  • the particles have a diameter of 550 nm.
  • a disadvantage of the structure described, however, is that due to the small particle size diffraction occurs. Also, the particles are only on the glass and are therefore optically not coupled to the substrate. Thus, this structure only affects the light scattering. The total reflection of the light at the substrate surface remains largely unaffected.
  • OLED's having a polymer layer are embedded in the microparticles are described in WO 03/061028 A2.
  • the polymer layer containing the microparticles is arranged between the substrate and the anode layer, that is, within the OLED.
  • the microparticles have a high refractive index of at least 1.7, so as to couple the light generated in the emitter layer into the glass substrate at a steeper angle.
  • the described arrangement relates to the "internal release" may cause the insertion of the particle-containing polymer layer to a higher roughness of the anode surface, the properties of the OLED may adversely affect s'.
  • An illumination system comprising a substrate and an active layer containing an electroluminescent material, wherein said active layer is provided between a first, optically transparent electrode layer and a second electrode layer, wherein a light-scattering layer having a medium having light diffusing properties is provided on a side of the transparent electrode layer facing away from the active layer, characterized in that the properties of the light-scattering layer are such that the non-scattering fraction of a light beam as it passes through the light-scattering layer is in the range between 0.005 and 0.8, is disclosed in EP 0 867 104 B1 disclosed.
  • OLEDs provide s, on the one hand have an increased external light outcoupling, the other hand, are also distinguished by a simple surface modification that is relatively easily manufactured can be.
  • Simple production in this context means both cost-effective production and technically simple production.
  • the subject of the present invention is thus an OLED 1 which at least
  • the substrate, the first and the second electrode are transparent, which is characterized in that on the transparent substrate and / or the transparent second electrode at least one transparent layer, preferably a transparent layer and particularly preferably a transparent film is arranged, which contains transparent, preferably spherical, particles which at least partially protrude from the at least one layer.
  • the transparent substrate and on the transparent second electrode means in the present application on the respective outer side, i. the opposite side of the light-emitting layer, the transparent substrate and the transparent second electrode.
  • the OLED has the following structure:
  • the transparent substrate at least one organic light-emitting layer, and a second electrode, which is characterized in that on the transparent substrate at least one transparent layer, preferably a transparent layer and particularly preferably a transparent film, is arranged, the transparent, preferably spherical Contains particles which at least partially protrude from the at least one layer.
  • top emission OLED In a second preferred embodiment (“top emission” OLED), the OLED has the following structure:
  • a substrate a first electrode
  • a transparent second electrode which is characterized in that on the transparent second electrode at least one transparent layer, preferably a transparent layer and particularly preferably a transparent film, is arranged, which contains transparent, preferably spherical, particles which are at least partially stand out of the at least one layer.
  • the substrate may be transparent, semi-transparent and non-transparent in this embodiment.
  • the OLED has the following structure:
  • a transparent second electrode which is characterized in that on the transparent substrate and / or the transparent second electrode at least one transparent layer, preferably a transparent layer and particularly preferably a transparent film, is arranged, the transparent, preferably spherical, Contains particles that at least partially protrude from the at least one layer. Particularly preferred is in this
  • either the first electrode may be formed as an anode and the second electrode as a cathode, or vice versa, the first alternative being the preferred embodiment.
  • an encapsulation is additionally preferably additionally arranged on the second electrode, specifically on the side opposite the light-emitting layer.
  • the encapsulation may be transparent, semi-transparent and non-transparent.
  • the encapsulation is transparent or semitransparent, preferably transparent.
  • the at least one transparent layer according to the invention must essentially meet a requirement. It must have the necessary transparency. Thus, the choice of available materials is very large. Accordingly, as materials for the at least one transparent layer, all known and commercially available materials, such as e.g. Glass, glassy materials (eg sol-gel systems) and plastics (eg polymer systems) are used, provided they have the appropriate transparency. Preference is given to plastics.
  • the plastics include in particular paints and adhesives.
  • lacquers it is possible to use all lacquers which are suitable for the use according to the invention and which are suitable for the use according to the invention, such as, for example, lacquers which contain the organic binder dissolved in organic solvents and / or water and also powder lacquers. Paints can be labeled according to different criteria. A corresponding overview can be found in the Römpp Chemie Lexikon, volume: Lacke and
  • adhesives it is also possible to use all adhesives suitable for the use according to the invention, such as, for example, physically and / or chemically setting adhesives.
  • adhesives suitable for the use according to the invention such as, for example, physically and / or chemically setting adhesives.
  • An overview of physically and chemically setting adhesives can be found in Römpp Chemie Lexikon, Volume 3, 9th edition, 1990. Preference is given to thermally and UV-curing adhesives.
  • the above-mentioned materials for the at least one transparent layer can be used optimally for the particular type of application (for example spin coating, screen and flexographic printing).
  • the at least one transparent layer preferably has a layer thickness of 1 ⁇ m to 1000 ⁇ m. Layer thicknesses in the range from 2 ⁇ m to 200 ⁇ m are particularly preferred.
  • materials for the transparent, preferably spherical particles it is possible to use all known and commercially available particles, provided that they have the appropriate shape, size and transparency.
  • Preferred materials for the transparent particles are glass, plastic and inorganic oxide particles.
  • glass or plastic particles which are used as spacers (so-called "spacers") in LCD production can be used, Particular preference is given to silica particles, such as the particles described, for example, in the exemplary embodiments.
  • the at least one transparent layer which contains the transparent, preferably spherical particles, can be either full-surface or structured.
  • the material for the at least one layer and / or the transparent, preferably spherical particles may also be colored.
  • the provision of materials for coloring the at least one transparent layer and the transparent particles is known to the person skilled in the art. In this way it is possible to obtain a colored coupling-out layer.
  • By structuring it is also possible to provide certain areas of the OLED with a colored decoupling layer.
  • several, different color ranges can be displayed on an OLED, for example by repeated application of differently colored decoupling layers. This makes it possible to combine the increase in light extraction with a colored representation on the OLED.
  • Transparent in the sense of the present invention means that the material has a light transmittance of> 60 to 100% at least in partial areas, but preferably in the entire area of visible light, semi-transparent means that the light transmittance is in the range of 20 to 60% and non-transparent means that the light transmittance is in the range of 0 to ⁇ 20%.
  • the term "at least partially” with respect to the protrusion of the transparent particles from the one layer means in the present invention that at least 10%, preferably 50% and more preferably 90% of the particles partially protrude from the at least one layer.
  • the transparent particles arranged in the at least one transparent layer are preferably spherical, ie essentially spherical.
  • the transparent, preferably spherical, particles preferably have an average diameter of 1 to 100 .mu.m, particularly preferred are average diameters of 2 to 10 microns. Also mixtures of particles of different size distribution are possible.
  • the refractive index n of the preferably spherical particles varies from 1.3 to 2.0, depending on the nature of the particles.
  • Spherical, ie essentially spherical, in the present invention means that the largest diameter of a particle is at most twice as large as the average diameter and the smallest diameter is at least half as large is like the mean diameter.
  • the surface roughness of the particles is in no way limited, it can range from very smooth to very rough.
  • the transparent particles are from 25 to 75% of their dimensions
  • Diameter more preferably 40 to 60% of its diameter, and more preferably about 50% of its diameter, out of the at least one transparent layer, i. In particular, they are incorporated approximately halfway into the at least one transparent layer, preferably into the one transparent layer and particularly preferably into the one transparent film.
  • the inventive arrangement which includes at least one transparent layer, the transparent, preferably spherical particles, which at least partially protrude from the at least one layer of significantly increasing the external extraction of the OLEDs.
  • the desired properties such. B. spectral properties to influence.
  • substrates all materials suitable for this purpose can be used.
  • preferred substrate materials are glass and plastics, glass being particularly preferred.
  • glass all kinds of glass can be used, such as typical window glass.
  • flat glasses are used, as they are used in the display industry (eg soda-lime glass or alkali-free glass).
  • plastics all thermoplastics can be used, but preferred are polymers such as polycarbonate (PC), Polymethylmethacrylate (PMMA), polyvinylcarbazole (PVK), polybutadienes, polyethylene (PE), polyethylene terephthalate (PET) and polyesters.
  • PC polycarbonate
  • PMMA Polymethylmethacrylate
  • PVK polyvinylcarbazole
  • PET polyethylene terephthalate
  • polyesters polyesters.
  • top emission OLEDs and metallic substrates such.
  • metallic foils can be used.
  • the thickness of the substrate is not limited, but is preferably in the range of 0.05 mm to 3, more preferably in Range from 0.2 to 1, 1
  • transparent anode are preferably indium tin oxide (ITO, indium tin oxides) or other metal oxides, such as.
  • ITO indium tin oxide
  • IZO indium-zinc oxide
  • the organic light-emitting layer can comprise as light-emitting materials either so-called “small molecules” or polymers.As materials, all materials known and suitable for this purpose by a person skilled in the art can also be used when using a plurality of light-emitting materials, these are arranged in one or more organic light-emitting layers (so-called "multi-layers").
  • the OLEDs' have further functional layers which can vary according to application can.
  • hole conductor, electron conductor, injection and / or barrier layers are conceivable. These may preferably be present, but are not mandatory.
  • materials for the non-transparent or semi-transparent cathode are preferably metallic materials, such as. As Al 1 Ag, Au or Cr used.
  • two-way Layer systems (bi-layer) of a thin layer of Ba, Li, LiF, Ca or Mg and a layer of a metal vapor-deposited are preferably transparent or semi-transparent cathode materials such as ITO, is used.
  • encapsulation all materials suitable for this purpose can be used.
  • preferred encapsulating materials are glass and plastics, with glass being particularly preferred.
  • glass all kinds of glass can be used, such as typical window glass.
  • flat glasses are used, as they are used in the display industry (eg soda-lime glass or alkali-free glass). Particular preference is given to using so-called vapor-deposition glasses, as disclosed, for example, in WO 03/088370 A1.
  • thermoplastics all thermoplastics can be used, but preferred are polymers such as polycarbonate (PC), polymethyl methacrylate (PMMA), polyvinylcarbazole (PVK), polybutadienes, polyethylene (PE) 1 polyethylene terephthalate (PET) and polyester.
  • PC polycarbonate
  • PMMA polymethyl methacrylate
  • PVK polyvinylcarbazole
  • PET polyethylene
  • metallic foils as encapsulation.
  • the encapsulation may consist of a single encapsulation layer in the simplest case, but it is also possible to build the encapsulation of several layers.
  • the total thickness of the encapsulation is not limited, but it is preferably in the range of 1 .mu.m to 3 mm, more preferably in the range of 5 .mu.m to 1, 1 mm.
  • a modification of the substrate surface and / or the surface of the second electrode or the encapsulation is necessary in the external coupling-out efficiency (substrate-air boundary) in order to reduce the total reflection at the boundary layer.
  • non-transparent and / or reflective, preferably spherical particles may also be proportionately embedded in the at least one layer.
  • the proportion of non-transparent and / or reflective, preferably spherical particles should not exceed 50%, preferably 25% and particularly preferably 10%.
  • the proportion of transparent, non-spherical particles also partially transparent and non-spherical particles such.
  • the proportion of transparent, non-spherical particles should not exceed 50%, preferably 25% and particularly preferably 10%.
  • the transparent, preferably spherical particles it is also possible for at least some of the transparent, preferably spherical particles to be aggregated.
  • the aggregation of the particles makes it possible to form a more diffuse surface. As a result, the external light extraction is additionally increased.
  • the present invention also provides a process for the preparation of an OLED, which is characterized in that one of the substrate and / or the second electrode and the encapsulation of the OLED at least one, preferably a transparent layer, especially preferably applies a transparent film in which preferably spherical particles are embedded, which at least partially protrude from the at least one layer.
  • a thin-layer encapsulation is used in a "top emission" OLED or a transparent OLED, this encapsulation can simultaneously serve as a carrier layer for the preferably spherical particles, but preferably a transparent protective layer is applied to the thin-layer encapsulation, which mechanically stabilizes the thin-layer encapsulation
  • the transparent protective layer can also serve as a carrier layer for the preferably spherical particles and both properties are combined in one layer system, but it is also possible for the at least one transparent layer, which contains the transparent, preferably spherical particles, additionally on the to arrange transparent protective layer.
  • the inventive OLED's can be for all the skilled person known processes. Such processes include spin, slit, spray and roller coating processes, as well as printing processes such as screen, offset and web printing.
  • the at least one layer can be applied and then the transparent, preferably spherical particles or the at least one layer and the transparent, preferably spherical particles are applied together in one step. If the preferably spherical particles are applied only after the thin-film coating, dry or wet spray methods can be used. An embedding of the transparent, preferably spherical particles by means of ultrasound is also possible. Further methods for introducing the transparent, preferably spherical particles are known to the person skilled in the art.
  • the at least one transparent layer is applied by printing (such as screen, offset and web printing), it may be applied directly to the substrate and / or the second electrode in a structured manner.
  • printing such as screen, offset and web printing
  • the structuring can be obtained by first applying the at least one transparent layer and then incorporating the transparent, preferably spherical particles into the at least one layer, the particles being applied at the points at which the at least one at least a layer is located, can be easily removed later. But it is also possible, the particles together with the at least one layer structured in a process step to apply.
  • Curing can be carried out according to all methods known and suitable to the person skilled in the art. However, UV curing and thermal curing are preferred.
  • the particles are sprayed onto the layer in a dry spray process.
  • the particles not embedded in the layer can then be removed by rinsing with water or by blowing off with compressed air.
  • Another object of the present invention relates to the use of OLEDs according to the invention in lighting devices.
  • the term lighting devices includes, for example, general lighting and backlighting of LCD ' s.
  • Another object of the present invention relates to the use of OLEDs in display according to the invention.
  • An approximately 50 nm thick PEDOT (poly (3,4-ethylenedioxythiophene)) layer (Baytron P AL4083) is placed thereon as a hole injection layer.
  • An approximately 80 nm thick emitter layer (“Super Yellow", Merck OLED Materials GmbH) is applied to this layer by spin coating.As a cathode, a thin barium layer and then a thicker (approximately 100 nm) aluminum layer are vapor-deposited in vacuo. Finally, the OLED is encapsulated by sticking a glass plate over its entire area in order to minimize the effects of oxygen and humidity on the OLED.
  • Fig. 2 shows the typical schematic structure of such OLEDs.
  • Light beams can be coupled into the plastic adhesive film. In this way direct coating of the OLED is made possible by a simple method.
  • Figure 3 shows a scanning electron micrograph of the adhesive film of Example 1 with the introduced balls. It can clearly be seen how the balls introduced into the adhesive film are approximately half out of the film.
  • the angle-dependent, relative light intensity is measured by the OLED produced, once without and once with the layer according to the invention which contains transparent, spherical particles which at least partially protrude from the at least one layer.
  • the angle of 0 ° corresponds to the normal (vertical) to the OLED substrate. In this vertical observation, a 20% increase in the light intensity is obtained compared with the OLED without the coating according to the invention. This effect is even stronger and increases to over 40%, with a measuring angle in the range of 60 to 80 °.
  • SiO 2 balls (d ⁇ 4 to 7 // m) with a larger diameter distribution, which are manufactured and sold under the name Ronasphere ® LDP by Merck KGaA, used. These particles are used, for example, as a filler for the cosmetics industry (eg for
  • Creams produced on a large scale and are therefore relatively inexpensive.
  • the refractive index of these spheres is about 1, 6.
  • Figure 5 shows a scanning electron micrograph of the adhesive film of Example 2 with the introduced balls.
  • Example 3 A transparent polymer layer (LCD topcoat) is applied by spin-coating to a glass pane, which constitutes the OLED support.
  • This material is manufactured by Japan Synthetic Rubber (JSR), Japan, and serves as a planarizing layer in LCD color filter production.
  • JSR Japan Synthetic Rubber
  • the solution is prepared by mixing two components (JSR JSS-273A and Optmer JSS-273B) in a weight ratio of 6: 1 (273A: 273B) before use and applying it to the glass plate at 800 rpm.
  • the SiO 2 balls of Example 2 are distributed by means of a dry spray on the wet film.
  • a 10 minute annealing step at about 120 0 C followed on the hot plate to evaporate the solvent and to polymerize the top coat material.
  • the balls are stored in the film and fixed. Ideally, the spheres dip to half the diameter in the polymer film.
  • Figure 7 shows a scanning electron micrograph of the adhesive film of Example 3 with the introduced balls.
  • Ronasphere particles described in Example 2 in an amount of 40 to 50% by weight, based on the paint, are introduced into a screen-printing lacquer MZ paint 093 from Pröll and homogeneously distributed in the paint. This mixture is by means of a screen printing unit patterned on the substrate outside of the OLED's printed.
  • Total thickness (transparent layer and particles) of about 8 to 10 microns, is cured in an oven at about 60 ° C.
  • Concentration of particles in the paint system is achieved a distribution in which the transparent particles protrude from the paint layer. Since the structured part of the layer increases the light output of the OLED, this coated region in the on state appears brighter than the rest of the uncoated area, while also light, but not so bright.
  • the lettering can be recognized even in the non-switched-state by the diffuse appearance, which gives the component an additional positive property.
  • visualizations can be visualized in bright surroundings, which can still be recognized in the dark by the OLED in the switched-on state.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nanotechnology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Composite Materials (AREA)
  • Biophysics (AREA)
  • Nonlinear Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Organic Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention concerne des diodes électroluminescentes organiques (OLED) comprenant au moins un substrat, une première électrode, au moins une couche électroluminescente organique et une deuxième électrode. Le substrat, la première électrode et la deuxième électrode ou le substrat, la première et la deuxième électrode sont transparents. L'invention est caractérisée en ce qu'au moins une couche transparente, appliquée sur le substrat et/ou la deuxième électrode transparente, contient des particules sphériques, de préférence, transparentes qui font au moins partiellement saillie de la couche. L'invention concerne également leur procédé de production et leur utilisation, notamment dans des dispositifs d'éclairage et dispositifs d'affichage.
EP06829325A 2006-01-05 2006-12-06 Diodes electroluminescentes organiques a extraction accrue de lumiere Withdrawn EP1969653A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006000993A DE102006000993B4 (de) 2006-01-05 2006-01-05 OLEDs mit erhöhter Licht-Auskopplung
PCT/EP2006/011686 WO2007076913A1 (fr) 2006-01-05 2006-12-06 Diodes electroluminescentes organiques a extraction accrue de lumiere

Publications (1)

Publication Number Publication Date
EP1969653A1 true EP1969653A1 (fr) 2008-09-17

Family

ID=37964878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06829325A Withdrawn EP1969653A1 (fr) 2006-01-05 2006-12-06 Diodes electroluminescentes organiques a extraction accrue de lumiere

Country Status (6)

Country Link
US (1) US8125145B2 (fr)
EP (1) EP1969653A1 (fr)
JP (1) JP2009522737A (fr)
KR (1) KR20080087026A (fr)
DE (1) DE102006000993B4 (fr)
WO (1) WO2007076913A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009181856A (ja) * 2008-01-31 2009-08-13 Sumitomo Chemical Co Ltd 透明導電膜付き透明板および有機エレクトロルミネッセンス素子
JP5117422B2 (ja) * 2008-07-15 2013-01-16 富士フイルム株式会社 発光装置及びその製造方法
JP5655567B2 (ja) * 2008-10-06 2015-01-21 旭硝子株式会社 電子デバイス用基板、その製造方法、これを用いた電子デバイス、その製造方法及び有機ｌｅｄ素子用基板
FR2940527A1 (fr) * 2008-12-23 2010-06-25 Saint Gobain Substrat transparent texture ou diffusant et procede de fabrication d'un tel substrat, destine notamment a un dispositif a diode electroluminescente organique.
JP2010171349A (ja) * 2009-01-26 2010-08-05 Asahi Glass Co Ltd 表示パネル用基板、その製造方法、これを用いた表示パネル及びその製造方法
DE102009022902B4 (de) 2009-03-30 2023-10-26 Pictiva Displays International Limited Organisches optoelektronisches Bauteil und Verfahren zur Herstellung eines organischen optoelektronischen Bauteils
WO2010143095A1 (fr) * 2009-06-10 2010-12-16 Koninklijke Philips Electronics N. V. Dispositifs électroluminescents
DE102009025123A1 (de) * 2009-06-16 2010-12-23 Osram Opto Semiconductors Gmbh Strahlungsemittierende Vorrichtung
TW201245405A (en) * 2011-03-08 2012-11-16 Du Pont Organic electronic device for lighting
US9029838B2 (en) 2011-06-29 2015-05-12 Samsung Display Co., Ltd. Methods of forming inclined structures on insulation layers, organic light emitting display devices and methods of manufacturing organic light emitting display devices
CN103636023B (zh) 2011-06-30 2016-09-14 欧司朗Oled股份有限公司 用于光电子器件的封装结构和用于封装光电子器件的方法
DE102011079160B4 (de) * 2011-07-14 2023-05-17 Osram Oled Gmbh Verkapselungsstruktur für ein optoelektronisches bauelement und verfahren zum verkapseln eines optoelektronischen bauelements
DE102012207151A1 (de) * 2012-04-30 2013-10-31 Osram Opto Semiconductors Gmbh Organisches lichtemittierendes bauelement und verfahren zur herstellung eines organischen lichtemittierenden bauelements
DE102014112696B4 (de) * 2014-09-03 2023-09-07 Pictiva Displays International Limited Organisches Bauelement
US10254577B2 (en) 2016-02-09 2019-04-09 Lim Industries LLC Electronic panel having a see-through mode
US11243735B2 (en) 2016-02-09 2022-02-08 Lim Industries LLC Electronic panel having multiple display devices and a multi-state device operable with a processor to control a see-through mode and a plurality of display modes
KR102332959B1 (ko) 2017-06-07 2021-12-01 삼성디스플레이 주식회사 표시 장치

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010033135A1 (en) * 2000-03-31 2001-10-25 Duggal Anil Raj Organic electroluminescent devices with enhanced light extraction

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW386609U (en) * 1996-10-15 2000-04-01 Koninkl Philips Electronics Nv Electroluminescent illumination apparatus
JP2001100012A (ja) 1999-09-29 2001-04-13 Tomoegawa Paper Co Ltd フィラーレンズおよびその製造方法
WO2000034806A1 (fr) * 1998-12-09 2000-06-15 Tomoegawa Paper Co., Ltd. Lentille a microbilles et son procede de fabrication
US6984934B2 (en) * 2001-07-10 2006-01-10 The Trustees Of Princeton University Micro-lens arrays for display intensity enhancement
JP2003100444A (ja) 2001-09-26 2003-04-04 Keiwa Inc 面照明装置
EP1445095B1 (fr) 2001-10-25 2012-12-26 Panasonic Corporation Substrat de support a film mince composite, substrat de support a film conducteur transparent et corps emetteur pour eclairage de panneau
AU2002331871A1 (en) 2001-11-09 2003-05-26 3M Innovative Properties Company Optical film for high contrast displays
US7053547B2 (en) * 2001-11-29 2006-05-30 Universal Display Corporation Increased emission efficiency in organic light-emitting devices on high-index substrates
US7012363B2 (en) * 2002-01-10 2006-03-14 Universal Display Corporation OLEDs having increased external electroluminescence quantum efficiencies
US6833667B2 (en) * 2002-02-27 2004-12-21 Matsushita Electric Industrial Co., Ltd. Organic electroluminescence element and image forming apparatus or portable terminal unit using thereof
US7081912B2 (en) * 2002-03-11 2006-07-25 Seiko Epson Corporation Optical writing head such as organic EL array exposure head, method of manufacturing the same, and image forming apparatus using the same
US6946771B2 (en) * 2002-07-10 2005-09-20 Quebec Metal Powders Limited Polyphase claw pole structures for an electrical machine
JP4310995B2 (ja) * 2002-11-11 2009-08-12 パナソニック電工株式会社 有機電界発光素子
DE10336041A1 (de) 2003-08-01 2005-02-17 Merck Patent Gmbh Optisches Schichtsystem mit Antireflexeigenschaften
JP2005284276A (ja) 2004-03-05 2005-10-13 Toshiba Matsushita Display Technology Co Ltd 表示装置の製造方法
TWI256269B (en) * 2004-03-05 2006-06-01 Toshiba Matsushita Display Tec Method of manufacturing display device
WO2005098986A1 (fr) * 2004-03-11 2005-10-20 Thomson Licensing Panneau electroluminescent comprenant une couche d’extraction de lumiere incorporant partiellement des particules transparentes.
JP2005276581A (ja) * 2004-03-24 2005-10-06 Aitesu:Kk 平面発光装置
DE112005000527A5 (de) 2004-04-21 2007-05-24 Schott Ag Beleuchtungsschichtsystem und Verfahren zur Herstellung desselben
EP1794798A1 (fr) 2004-09-28 2007-06-13 Toshiba Matsushita Display Technology Co., Ltd. Écran
KR100624307B1 (ko) * 2005-02-23 2006-09-19 제일모직주식회사 표시장치용 저반사율의 휘도 향상 다층 광학필름 및 이를이용한 유기발광다이오드 표시장치
US7531955B2 (en) * 2005-07-12 2009-05-12 Eastman Kodak Company OLED device with improved efficiency and robustness
US7834541B2 (en) * 2006-10-05 2010-11-16 Global Oled Technology Llc OLED device having improved light output

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010033135A1 (en) * 2000-03-31 2001-10-25 Duggal Anil Raj Organic electroluminescent devices with enhanced light extraction

Also Published As

Publication number Publication date
KR20080087026A (ko) 2008-09-29
DE102006000993A1 (de) 2007-07-12
DE102006000993B4 (de) 2010-12-02
WO2007076913A1 (fr) 2007-07-12
US8125145B2 (en) 2012-02-28
JP2009522737A (ja) 2009-06-11
US20090001883A1 (en) 2009-01-01

Similar Documents

Publication Publication Date Title
EP1969653A1 (fr) Diodes electroluminescentes organiques a extraction accrue de lumiere
DE69831860T2 (de) Elektrode zur verwendung in elektrooptischen bauelementen
EP1753048B1 (fr) Procédé de fabrication d'un dispositif emettant par le haut et son utilisation
EP2252989B1 (fr) Ensemble émettant un rayonnement
DE102004035965B4 (de) Top-emittierendes, elektrolumineszierendes Bauelement mit zumindest einer organischen Schicht
EP2002493B1 (fr) Diodes électro-luminescentes organiques à grande surface à émission de lumière homogène
DE102007060108B4 (de) Verfahren zur Herstellung eines Solarzellenmoduls
DE102011086168B4 (de) Organisches Licht emittierendes Bauelement und Verfahren zur Herstellung eines organischen optoelektronischen Bauelements
EP1738423A1 (fr) Element electro-optique organique a efficacite de decouplage accrue
DE102012200084B4 (de) Strahlungsemittierendes organisches bauteil
WO2006024278A1 (fr) Composant electroluminescent a emission superieure comprenant des centres de conversion de frequence
CN103120018B (zh) 有机el器件
DE60026778T2 (de) Substrat für lichtemittierende Vorrichtung, lichtemittierende Vorrichtung und Herstellungsverfahren
EP2057700A1 (fr) Dispositif luminescent
DE112005003229T5 (de) Organische elektrolumineszierende Vorrichtung
DE102004041371A1 (de) Aktiv-Matrix-Display auf der Basis organischer Leuchtdioden mit erhöhtem Füllfaktor
EP3599318A1 (fr) Éléments de façade pourvus de plaque de couverture structurée et de couche d'interférence optique
DE112009001825T5 (de) Organische elektrolumineszierende Vorrichtung
DE10328140A1 (de) Organische lichtemittierende Einrichtung
CN105810757A (zh) 一种用于智能调光膜的透明导电薄膜电极及其制备方法
DE102008051012B4 (de) Lichtemittierende Vorrichtung und Verfahren zum Herstellen
CN102473531A (zh) 有改进光学特征的染料敏化太阳能电池
WO2009124532A1 (fr) Composant organique électro-optique
WO2004088365A1 (fr) Plaque minéralogique de véhicule luminescente
DE102014106549B4 (de) Organisches Licht emittierendes Bauelement

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080326

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20090409

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20121106