WO2013053805A1 - Verkapselung für ein organisches elektronisches bauelement - Google Patents
Verkapselung für ein organisches elektronisches bauelement Download PDFInfo
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- WO2013053805A1 WO2013053805A1 PCT/EP2012/070134 EP2012070134W WO2013053805A1 WO 2013053805 A1 WO2013053805 A1 WO 2013053805A1 EP 2012070134 W EP2012070134 W EP 2012070134W WO 2013053805 A1 WO2013053805 A1 WO 2013053805A1
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- Prior art keywords
- layer
- adhesive layer
- encapsulation
- organic electronic
- thin
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- 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
- H10K50/846—Passivation; Containers; Encapsulations comprising getter material or desiccants
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- 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
-
- 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
- H10K50/841—Self-supporting sealing arrangements
-
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having a potential-jump barrier or a surface barrier
- H10K10/80—Constructional details
- H10K10/88—Passivation; Containers; Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/80—Constructional details
- H10K30/88—Passivation; Containers; Encapsulations
-
- 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
- H10K50/842—Containers
- H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
-
- 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
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- 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
- H10K50/87—Arrangements for heating or cooling
Definitions
- the invention relates to an encapsulation for an organic electronic component, an organic electronic component with the encapsulation and a method for
- OLEDs organic light emitting devices
- Thin-film encapsulations with thin layers known. Such a thin-layer encapsulation is described, for example, in the application DE 10 2008 048 472.
- the object of the present invention is to specify an improved encapsulation for an organic electronic component. Furthermore, it is the task of the present invention
- Encapsulation for an organic electronic component with a layer sequence comprising the following layers:
- the first adhesive layer arranged on the at least one thin-layer encapsulation, the first adhesive layer comprising at least one getter material, and
- Adhesive layer Adhesive layer.
- the inventors have surprisingly found that the use of an adhesive layer with at least one getter material on the one hand a good bonding of the thin-film encapsulation is made possible with the cover layer, but on the other hand by this encapsulation and an increased life of electronic components is possible compared to components whose encapsulation provided with an adhesive layer which has no getter material.
- first layer or a first element is arranged or applied "on” or “above” a second layer or a second element or also "between” two further layers or elements can here and in the following
- an indirect contact can also be designated, in which further layers and / or elements are arranged between the first layer or the first element of the second layer or the second element or the two further layers or elements.
- Encapsulation designed such that it can be penetrated by atmospheric substances such as water or oxygen at most very small proportions or the air and
- Moisture diffusion is significantly delayed compared to previous encapsulations.
- a "getter material” is a material which penetrates from the outside disturbing substances such as
- Oxygen or the water of humidity absorbs or adsorbs with the result that the first
- Adhesive layer in addition to its adhesive properties in addition oxygen and / or moisture repellent
- Encapsulation which is suitable for forming a first barrier to atmospheric substances, in particular to moisture and oxygen. Due to the thin film encapsulation, the organic electronic
- the component Due to the thin-film encapsulation, the component already has a first basic seal against environmental influences.
- the thin-layer encapsulation has only "thin layers" with a thickness less than or equal to a few 100 nm.
- the at least one thin-layer encapsulation becomes
- PVD Physical vapor deposition
- ALD atomic layer deposition
- Atomic layer deposition or plasmalose atomic layer deposition generated Atomic layer deposition or plasmalose atomic layer deposition generated.
- a chemical vapor deposition (CVD) and an atomic layer deposition (ALD) may be present in this case
- Physical vapor deposition herein may refer to a process in which a gaseous compound condenses on a surface of a provided substrate, such as sputtering
- a chemical vapor deposition may denote a process in which on at least one surface of a provided substrate having at least one organic functional layer at least two gaseous
- Output connections are simultaneously supplied to a volume in which the substrate is provided. Furthermore, it may be necessary for the at least one surface of the provided substrate with the at least one organic functional layer to be at a temperature
- ALD is particularly referred to as a method in which a first gaseous starting compound is a
- volume is supplied, in which one to be coated
- the first gaseous compound can adsorb on the surface. After a preferably complete or almost complete covering of the surface with the first starting compound, the part of the first starting compound which is still present in gaseous form and / or not adsorbed on the surface is usually removed from the volume again and a second
- the second starting compound is intended to chemically react with the first starting compound adsorbed on the surface to form a solid ALD layer.
- the surface to be coated is heated to a temperature above room temperature. This allows the reaction to Formation of the solid ALD layer are thermally initiated.
- the temperature of the surface to be coated is usually dependent on the starting compounds.
- Plasma-less atomic layer deposition in the present case refers to an ALD process for which no plasma is generated as described below, but in which, for the formation of the solid layer, the reaction of the starting compounds only via the Temperature of the surface to be coated is initiated.
- the temperature of the surface to be coated is usually between 60 ° C and 120 ° C in a PLALD process, the limits being included.
- PEALD enhanced atomic layer deposition
- the temperature to which the surface to be coated must be heated can be reduced and, nevertheless, the reaction between the starting compounds can be initiated by plasma generation.
- the temperature of the surface to be coated is preferably less than or equal to 120 ° C., particularly preferably less than or equal to 80 ° C., for PEALD.
- a PEALD process may be advantageous if initiation of the reaction between the
- the getter material may be in the form of getter particles in the adhesive layer.
- the getter particles can have a diameter of ⁇ 1 ym to 50 ym.
- the diameter of the getter particles is not greater than the layer thickness of the adhesive layer in order not to damage the adjacent layers and the component.
- the getter particles have one
- the getter particles have a maximum diameter of 10 ym at a thickness of
- Adhesive layer of 10 ym Particularly preferred is a
- Diameter of the getter particles none than 1 ym, regardless of the layer thickness of the adhesive layer. Thus, even with a dense packing of the particles punctual forces can be reduced to, for example, an OLED.
- the getter material is dissolved in the adhesive.
- the getter material may comprise oxidizable materials which can react with and bind oxygen and water.
- oxidizable materials which can react with and bind oxygen and water.
- the getter material may include magnesium, calcium, barium, cesium, cobalt, yttrium, lanthanum, and / or rare earth metals. You can also continue other metals, such as aluminum, zirconium, tantalum, and / or titanium or oxidizable non-metallic materials. In addition, that can
- Getter material also includes CaO, BaO and MgO.
- the getter material includes desiccants that can irreversibly absorb water without changing their volume.
- the getter material may comprise, for example, dried silica gels.
- the getter material comprises zeolites, which are preferably dried and those in their pores and
- Channels can adsorb oxygen and / or water. In the adsorption of water and / or oxygen by
- dried silica gels and / or zeolites do not give rise to products harmful to the underlying layers, and the dried silica gels and / or zeolites preferably do not change in volume as a result of the reaction with water and / or oxygen.
- the encapsulation is transparent.
- transparent it is meant herein that a material or layer is permeable to the entire visible electromagnetic spectrum or to a sub-spectrum thereof
- an OLED can thus be coupled out via the encapsulation and the OLED is designed as a "top emitter.” It is also possible for light to be radiated from outside via the encapsulation into the organic electronic component, such as
- Encapsulation comprising the thin-layer encapsulation, the first adhesive layer and the cover layer, is in the beam path in the case of this embodiment, for example
- the encapsulation comprises at least one second thin-layer encapsulation.
- the second thin-layer encapsulation may be different than the first thin-layer encapsulation with respect to the material. In this way it is possible to use the optical
- the second thin-layer encapsulation can be like the first
- Thin film encapsulation for example by CVD, PVD
- the first and / or second thin-layer encapsulation may comprise one of the following materials: aluminum oxide, zinc oxide, zirconium oxide, titanium oxide, hafnium oxide, lanthanum oxide,
- the first and / or second thin-layer encapsulation may have a layer thickness of 1 nm to 5 ym.
- the layer thickness of the first and / or the second thin-film layer can be Encapsulation between 10 nm and 500 nm and more preferably the layer thickness is between 10 nm and 100 nm.
- Thin layer thicknesses of the thin-layer encapsulation usually contribute to a high optical transmission of the thin-layer encapsulation.
- the layer thicknesses of the first and the second thin-layer encapsulation may be different.
- the first adhesive layer has one
- the first adhesive layer may have a layer thickness of 10 ⁇ m to 50 ⁇ m. Thin layer thicknesses of the first adhesive layer generally contribute to a high optical transmission of the layer.
- the first adhesive layer may comprise an adhesive material in which the getter material is embedded. The adhesive layer may in particular also be transparent to the radiation emitted or received by the component.
- the getter material may be one
- the scattering effect may be due to a refractive index difference between the
- Refractive index of the first adhesive layer for example, the adhesive material and the refractive index of the first adhesive layer
- Getterpumble be conditional. A scattering effect occurs when the getter particles have a different
- Refractive index to the first adhesive layer for example, the adhesive material have.
- Spectral range is greater than or equal to 0.05.
- Scattering may be due to the size of the particles, their
- the getter particles have a mean particle size of 10 nm to 10 ⁇ m, in particular an average particle size of 100 nm to 3 ⁇ m, for a scattering effect.
- the first adhesive layer may comprise scattering particles in addition to the getter material and the adhesive material.
- the first adhesive layer may comprise scattering particles in addition to the getter material and the adhesive material.
- the scattering particles may include air bubbles, metal oxides, CaF, diamond and / or glass.
- the metal oxides may include ZrO 2 , TiO 2 , Al 2 O 3, SiO 2 , ZnO, indium tin oxide (ITO), indium zinc oxide (IZO) and Ga 2 O.
- the scattering particles can coat or
- the scattering particles have an average particle size of 10 nm to 10 ym, in particular an average particle size of 100 nm to 3 ym. It is possible that the scattering particles differ in their particle size. It is also possible that various scattering particles are present in the first adhesive layer. If the optical electronic component is an OLED, the getter particle and / or the
- the homogeneity of the illuminance at the light exit surface can be improved. It is possible to realize a more homogeneous emission characteristic of the OLED.
- the getter and / or scattering particles it is possible by means of the getter and / or scattering particles to obtain the effect that the OLED has a greater effective Has emission surface or can illuminate a larger area compared with a device without
- the encapsulation can therefore, in addition to the adhesion of the thin-layer encapsulation and the cover layer and the delayed air or
- the getter material of the first adhesive layer is homogeneously distributed in the first adhesive layer, for example in the adhesive material.
- Gettermaterials the application of the first adhesive layer. Through a homogeneous distribution of the getter material a uniform oxygen or water absorption over the entire adhesive layer is possible. If the getter material is in the form of particles in the adhesive layer and these particles should have a scattering effect on emitted radiation of e.g. have an OLED, is homogeneous by a homogeneous distribution of getter particles in addition
- first adhesive layer may additionally
- thermally conductive particles are selected from a group comprising carbon nanotubes, diamond, copper, boron nitride,
- the thermal conductivity can be between 28 and 6000 W / mK.
- Heat distribution within the device and thus reduces a differential aging of the device and thus increases the life of the device or increases the
- Luminance at e.g. an organic light emitting diode The higher the thermal conductivity, the better the heat can be
- heat-conductive particles with appropriate size and / or
- Refractive index difference to the adhesive material additionally have a scattering effect on radiation, for example, an OLED.
- the getter material is inhomogeneously distributed in the first adhesive layer, for example in the adhesive material.
- the getter material is inhomogeneously distributed in the first adhesive layer, for example in the adhesive material.
- Adhesive layer have a higher concentration. This embodiment is particularly suitable when it is desired to absorb oxygen and / or water penetrating from the side. This is possible, for example, if the first adhesive layer is in direct contact with the environment at the side edges, while the main surface of the first adhesive layer is covered by the cover layer.
- the adhesive material of the first adhesive layer comprises a two-part adhesive and / or a thermosetting adhesive.
- the adhesive material comprises methyl acrylate Adhesives. Methyl acrylate adhesives polymerize by a radical mechanism, using as a monomer
- Methyl acrylate is used.
- the adhesive material of the first adhesive layer may comprise a light-curing adhesive.
- a light-curing adhesive targeted hardening under UV light and rapid curing is possible.
- Light-curing adhesives are preferably without
- Solvent used With Solvent used. Thus, possible undesired effects due to the shrinkage of the adhesive layer due to solvent shrinkage, such as layer stresses and point forces on the underlying layer, can be avoided. There is thus also no danger that a solvent penetrates into the active layer, for example an OLED, and thus possibly damages the active layer. Since solvents have to be sucked off again during the curing process, considerably less technical effort is required with the use of solvent-free adhesives.
- the adhesive material of the first adhesive layer comprises an epoxy adhesive.
- Epoxy resin adhesive will not damage the organic electronic device in case of a point defect.
- Epoxy resin adhesive comprises an epoxy-containing A component and a B component as a hardener.
- the A component comprises at least one epoxy resin selected from
- the A component is solvent-free.
- the adhesive material of the first adhesive layer may according to a further embodiment also be silicone hybrid, Polyurethanes, acrylates, phenolic resins, polysulfides and / or melamine resins.
- the cover layer of the encapsulation serves the mechanical
- the cover layer may be selected from a group comprising glass, metals, lacquers or plastics.
- the metals may include, for example, copper or aluminum.
- the metals and plastics can be films.
- the cover layer may have a layer thickness of 10 ym to 4 mm. Particularly preferred is a layer thickness of the cover layer of 100 ym to 0.7 mm.
- organic electronic component comprising a substrate, at least one active layer disposed on the substrate
- the encapsulation is arranged, and an encapsulation, as already described above, ready. Furthermore, the encapsulation is arranged over the active layer.
- the active layer is a
- Radiation generating layer such as e.g. in an OLED or a radiation-receiving layer, e.g. at a
- the active layer of an OLED or the majority thereof may be organic polymers, organic oligomers, organic
- fluorescence or phosphorescence for example, polyfluorene, polythiophene or polyphenylene or derivatives, compounds, mixtures or copolymers thereof.
- the solar cell may comprise the active layer or the plurality thereof one or more semiconductive materials which are monomeric, oligomeric and / or polymeric.
- the organic electronic component comprises a first and a second electrode, which serve for the charge carrier injection into the active layer or holes formed by light irradiation (positive charges) and discharge electrons.
- the first and / or the second electrode may be transparent.
- the first or second electrode can be connected as an anode or as a cathode.
- Generated light for example an OLED, can thus be emitted via the anode and / or cathode, or light can enter the component from the outside via the anode and / or cathode, for example in the case of an organic solar cell.
- a transparent first electrode which can be embodied as an anode and thus serves as a hole injecting material, can, for example, be a transparent conductive oxide
- TCO Transparent conductive oxides
- metal oxides such as zinc oxide, for example.
- Tin oxide Tin oxide, cadmium oxide, titanium oxide, indium oxide or
- ITO Indium tin oxide
- binary Metal oxygen compounds such as ZnO, SnÜ 2 or In 2 Ü 3 also include ternary metal oxygen compounds such as Zn 2 SnC> 4, CdSnO 3 , ZnSnÜ 3 , MgIn 2 Ü 4 , GalnO 3 , ⁇ 2 ⁇ 2 ⁇ 5 or In 4 Sn 3 0i 2 or mixtures of different transparent conductive oxides to the group of TCOs.
- TCOs do not necessarily correspond to one
- stoichiometric composition and may also be p- or n-doped.
- the second electrode can be embodied as a cathode and thus serve as an electron-injecting material.
- the cathode material may, inter alia, in particular
- the substrate is transparent.
- generated light from, for example, an OLED can be radiated through the substrate or else light can be coupled from the outside through the substrate into the component, such as
- the electrode adjacent to the substrate is transparent.
- it is an OLED, it can be embodied as a so-called “bottom emitter.” It is also possible that it is a "transparent OLED", if, in addition, the encapsulation is transparent and the light emission is thus down through a transparent emitter Substrate as well as up through a transparent encapsulation.
- the substrate is glass, quartz, plastic ⁇ films, metal, metal foil, silicon wafer or other suitable substrate material may comprise.
- that can Substrate be a plastic film comprising suitable barrier layers.
- the layer of organic electronic material directly adjacent to the encapsulation is the layer of organic electronic material directly adjacent to the encapsulation
- the encapsulation has no cavity.
- Component can be achieved.
- the active layer of the organic electronic component has edges and
- Thin-layer encapsulation at least the edges and / or the side surfaces and facing away from the substrate
- the edges and / or side surfaces and the main surface of the active layer facing away from the substrate can be completely covered by the thin-layer encapsulation.
- a first shielding of the main surface facing away from the substrate and the edges and / or side surfaces of the active layer against oxygen and water of the environment can be ensured by the thin-layer encapsulation.
- a further embodiment is also a part of
- Thin-film encapsulation covered, in particular the part of the substrate which is adjacent to the active layer to ensure a good encapsulation.
- the at least one thin-layer encapsulation comprises one of the active layer
- Adhesive layer over the main layer facing away from the main surface of the at least one thin-film encapsulation is arranged.
- Thin film encapsulation may be covered by the first adhesive layer, which cover the edges and / or the side surfaces of the active layer of the organic electronic component.
- the first adhesive layer which cover the edges and / or the side surfaces of the active layer of the organic electronic component.
- Oxygen and water from the environment should penetrate especially over the edges and side surfaces to the active layer, here should be the exclusion of air and moisture
- the first adhesive layer may be between 10 ym and 20 mm, in particular between 0.5 mm and 5 mm and
- Adhesive layer extends beyond the edges of the active layer covered by the thin film encapsulation, the better The edges and side surfaces of the active layer are shielded from the ingress of oxygen and water.
- the first adhesive layer is in direct contact with the substrate. As a result, the bond is significantly improved.
- the first adhesive layer over the portions of the thin-film encapsulation that cover the edges and / or the side surfaces of the active layer and above the main surface of the thin-layer encapsulation
- the layer thickness of the first adhesive layer which the layer thickness of the first adhesive layer
- Portions of the thin-film encapsulation that cover the edges and / or the side surfaces of the active layer may be thicker than the layer thickness of the first adhesive layer over the main surface of the thin-layer encapsulation. In this way, the edges and / or side surfaces of the active layer can be more effectively protected from ingress of oxygen and water. This is possible, for example, if the cover layer has a low permeability to oxygen and water, and thus the main surface of the active layer is already sufficiently protected from external influences by the thin-film encapsulation, a thin first adhesive layer and the cover layer.
- the first covers
- Adhesive layer Areas of the thin-film encapsulation that extend beyond the active layer beyond the substrate, resulting in a particularly good encapsulation and thus protection of the active layer of the organic electronic
- the first adhesive layer may be in direct contact with the environment.
- the adhesive layer with at least one getter material is extremely high
- the cover layer which is the organic component against mechanical influences
- Main surface of the at least one thin-film encapsulation arranged.
- the cover layer may protrude beyond the side surfaces and edges of the active layer. In particular, the entire main surface of the cover layer, that of the first
- Adhesive layer facing is glued to the first adhesive ⁇ layer. It is also possible that the cover layer is arranged over the side surfaces of the first adhesive layer. Thus, a particularly high protection of the side surfaces of the active layer can be achieved, which with the
- an organic electronic component is specified, wherein a second
- Adhesive layer is present and wherein the second
- Adhesive layer at least partially around the first
- Adhesive layer is arranged circumferentially.
- Adhesive layer serves to promote adhesion of the cover layer and the thin-layer encapsulation. In this way, an early delamination of these layers is increasingly prevented.
- the second adhesive layer exhibits a better adhesive property than the first adhesive layer.
- the second adhesive layer can be free from
- the adhesive strength may be between 1 N / mm and 20 N / mm, in particular between 3 N / mm to 10 N / mm.
- Adhesive layer has a shear strength between 1 and 90 N / mm 2 , in particular between 5 and 15 N / mm 2 .
- Shear strength is the resistance that the topcoat opposes to tangential shear forces. It specifies the maximum shear stress with which the cover layer can be loaded before shearing.
- the second adhesive layer may comprise an epoxy adhesive.
- Particularly advantageous epoxy resin adhesives are used, which are cured at temperatures of 80 ° C to about 100 ° C. It is also possible that the
- Epoxy resin adhesive are cured under UV exposure.
- the second adhesive layer may be the same
- adhesive material such as the first adhesive layer.
- the second adhesive layer may be transparent. So can the encapsulation, which is a second
- Adhesive layer also comprises a total of transparent
- the second adhesive layer is completely circumferential around the first Adhesive layer arranged, resulting in an even better
- Adhesion of the adjacent layers leads.
- the partial regions of the thin-layer encapsulation may be covered by the second adhesive layer, which forms the edges and / or the side surfaces of the active layer of the
- the second layer of adhesive passes over the edges of the active layer coming from the
- the second layer of adhesive may be between 50 ym and 20 mm, more preferably between 500 ym and 5 mm and most preferably between 500 ym and 3 mm across the edges of the active layer covered by the thin-layer encapsulation.
- the second adhesive layer is arranged above the main surface of the thin-layer encapsulation facing away from the active layer and the first
- Adhesive layer is at least partially around the second
- Adhesive layer arranged circumferentially.
- the first adhesive layer can be arranged completely circumferentially around the second adhesive layer.
- the active layer and the thin-layer encapsulation are protected from air and water diffusion from the sides by the first adhesive layer. This protection is increased even further in a further embodiment, in which the first adhesive layer also covers the subareas of the thin-layer encapsulation that cover the edges and / or the side surfaces of the active layer.
- the active layer is arranged between a first and a second electrode, wherein the first electrode is arranged on the substrate.
- the electronic component comprises a first further
- Adhesive layer comprising at least one getter material.
- the first further adhesive layer may be disposed between the first electrode and the substrate.
- the organic electronic component can be protected by the encapsulation and additionally from the substrate by the first further adhesive layer against the ingress of moisture and air.
- this embodiment is possible with flexible OLEDs which have flexibly formed substrates.
- Substrates such as plastic films, have increased moisture and oxygen permeability compared to, for example, glass substrates. Therefore, especially in these cases, if the substrate does not offer sufficient protection, there is an increased demand to protect the active layer of an OLED also from the substrate better against the penetration of water and air.
- the first further adhesive layer is arranged on rough substrates.
- rough substrates have different Surface heights, bumps or a patchy
- the surface heights can be in the range of 10 nm and 100 ym.
- the first additional layer of adhesive can additionally have a planarizing effect and possible
- this embodiment may be a top emitter OLED.
- the first further adhesive layer comprising a getter material may have the same features or combinations of features as described for the first adhesive layer above.
- At least one thin-layer encapsulation is arranged between the first further adhesive layer and the first electrode.
- a second further adhesive layer is present in the component, which is arranged circumferentially around the first further adhesive layer.
- the second additional layer of adhesive can be free from
- the second further adhesive layer may have the same features or combinations of features described above for the second adhesive layer.
- the second further adhesive layer is preferably arranged completely circumferentially around the first further adhesive layer.
- the second further adhesive layer is between the first electrode and the
- Substrate disposed and the first further adhesive layer is circumferentially around the second additional adhesive layer
- the first further adhesive layer is preferred completely circumferentially arranged around the second additional adhesive layer.
- the organic electronic component may be an organic light emitting diode, a solar cell, an organic
- the organic field effect transistor may be an all-OFET in which all
- this is organic electronic
- the active layer of the organic electronic component may have a surface of 1 cm ⁇ to 1 m ⁇ .
- the active layer may have a surface area of from 5 cm 2 to 2000 cm 2, and more preferably a surface area of from 25 cm 2 to 1000 cm 2 .
- the planar component is a surface light source.
- An OLED may, for example, comprise as further layers: a hole-inducing layer, a hole-transporting layer, an electron-transporting layer and / or an electron-inducing layer.
- Such layers can serve to further increase the efficiency of the OLED and be formed at one or more suitable locations of the OLED. Possible materials of these layers are
- a method for producing an organic electronic component comprising the method steps: a) providing an organic electronic layer stack comprising a first and a second
- Electrode a substrate and at least one active layer, b) depositing at least one thin-layer encapsulation on the layer stack
- Adhesive layer Adhesive layer.
- the cover layer can be bonded to the thin-layer encapsulation.
- the method step b) can be another
- Process step b1) comprises depositing at least one second thin-layer encapsulation.
- Layer stack under process step a) can comprise the following process steps:
- Layer stack under process step a), after process step a2), may comprise a further process step a2 ') depositing at least one thin-layer encapsulation on the first further adhesive layer. It is possible that the method step a2) comprises a further method step a2 ") applying a second further adhesive layer.
- Process step b) and / or bl) and / or a2 ') are deposited by means of CVD, ALD and / or PVD.
- the cover layer can be laminated on under process step d). If the cover layer is laminated, a particularly thin cover layer can be applied.
- the cover layer may have a layer thickness of 100 ym to 0.7 mm. This method is particularly suitable for glass, plastic and metal foils.
- Another possible process step is e) UV curing of the first adhesive layer after process step d).
- Thin film encapsulation can be achieved so that they can not change their position. Subsequently, the complete curing can take place thermally over a longer period of time.
- the pre-curing is possible, for example, by exposure (250 nm ⁇ ⁇ 400 nm) in an intensity range of 100 mW / cm 2 for three minutes. Thermal post cure can be done at 80 ° C for 30 minutes.
- the first further layer of adhesive can be used analogously to the methods described for the first adhesive layer
- Process step a2 ') or a3) are cured.
- method step c) comprises a further method step c1) application of the second adhesive layer.
- Another possible method step f) hardening of the second adhesive layer according to method step d), e) or e2) may be possible.
- method step f) may comprise a thermal curing of the second adhesive layer at temperatures of 80 ° C to 100 ° C.
- step f) comprises curing of the second adhesive layer by UV exposure.
- the second further adhesive layer can be cured analogously to the processes described for the second adhesive layer after process step a2 ') or a3).
- FIGS. 1A and 1B show an embodiment of an organic electronic component in a schematic sectional view and in the plan view.
- FIGS. 2 to 5 show schematic sectional views of an organic electronic component according to FIG.
- Figures 6A and 6B show a further embodiment of an organic electronic component in a schematic
- FIGS. 7 to 9 show schematic sectional views of an organic electronic component according to FIG.
- Embodiment of Figure 1A comprises a substrate 1, an active layer 2 disposed on the substrate 1, a
- Thin-film encapsulation 5 arranged on the active layer 2, an adhesive layer with a getter material 3 and a cover layer 4.
- the getter material is present in the adhesive layer 3, for example in the form of getter particles.
- the thin-layer encapsulation 5 and the adhesive layer 3 and the adhesive layer 3 and the cover layer 4 are in particular in direct contact with each other.
- the thin-film encapsulation 5 covers the edges 2a, the side surfaces 2b and the
- Substrate 1 which is not covered by the active layer 2. It is also possible for the thin-layer encapsulation 5 to have the main surface of the substrate 1 adjacent to the active layer 2, which is not covered by the active layer 2,
- the adhesive layer 3 covers the Main surface of the thin-film encapsulation 5 and the
- the adhesive layer 3 extends beyond the edges 2a of the active layer 2, which are covered by the thin-film encapsulation 5, and is in direct contact with the environment.
- the cover layer 4 covers the main surface of the
- Adhesive Layer 3 By disposing the adhesive layer 3 over the edges 2a and side surfaces 2b of the active layer 2 covered by the thin-layer encapsulant 5, an overlap region of the adhesive layer 3 is formed beyond the edges 2a of the active layer 2. As a result of this arrangement, the moisture only penetrates into the active layer 2 via the side surfaces 2b after a much longer time than in the case of other organic electronic components, since the side surfaces 2b of the active layer 2 are covered by the thin-layer encapsulation 5 and the adhesive layer 3. Especially with large-area components, the advantage is enormous, since the path from the outer edges to the active layer 2 for moisture and / or oxygen is correspondingly longer.
- the adhesive layer 3 By disposing the adhesive layer 3 over the edges 2a and side surfaces 2b of the active layer 2 covered by the thin-layer encapsulant 5, an overlap region of the adhesive layer 3 is formed beyond the edges 2a of the active layer 2.
- the moisture only penetrates into the active layer 2 via the side surfaces 2b after a much longer time than in the case of other
- Getter material may include, for example, zeolites in the embodiment, but are also oxidizable
- Thin film encapsulation 5 may include, for example, alumina but also zinc oxide, zirconia, titania, hafnia, lanthana, silica, silicon nitride.
- the cover layer 4 may comprise glass, but are also possible aluminum, copper, a paint or a plastic.
- the adhesive layer 3 and the cover layer 4 may be transparent.
- the organic compound Preferably, the organic compound having the organic radicals, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids, amino acids
- the getter particles may have a scattering effect with respect to the generated radiation of the active layer 2.
- the encapsulation can therefore in addition to the bonding of the thin-film encapsulation 5 and the cover layer 4 and a delayed air and moisture diffusion in addition to
- the active layer 2 of the component comprises, for example
- organic functional material In the active layer 2 of an OLED can by electron and hole injection and recombination electromagnetic radiation with a
- the organic functional material may include, for example, organic polymers, organic oligomers, organic monomers, organic small non-polymeric molecules, or combinations thereof.
- the first substrate may be quartz, plastic films, metal,
- the exemplary embodiment according to FIG. 1A is an organic solar cell, an organic field-effect transistor or an organic electronics.
- the active layer 2 may receive radiation and include one or more semiconductive materials that are monomeric, oligomeric, and / or polymeric.
- FIG. 1B shows a plan view of the component already shown in FIG. 1A.
- FIG. 1B shows that the active layer 2 is applied centrally over part of the main surface of the substrate 1.
- the adhesive layer 3 is over of the active layer 2 covers the main surface 2c of the active layer 2 and protrudes beyond the edges 2a of the active layer 2.
- the failure rate is about 20% after about 1700 h and is thus smaller by half than in the case of the OLEDs without getter material in the US Pat epoxy adhesive.
- the failure reason for the OLEDs according to the invention is not in the penetration of water and / or oxygen to the active layer, but in that it is due to too low adhesion of the first adhesive layer with getter material to early delamination. This premature
- Adhesive layer can be reduced.
- the exemplary embodiment according to FIG. 2 shows that the
- Adhesive layer 3 is arranged. Includes the cover layer 4 glass, the cover layer 4 by means of glass frits with the
- Substrate 1 are bonded.
- the adhesive layer 3 is not in direct contact with the environment and is from the cover layer 4 from air and moisture in the environment
- Embodiment shown in FIG 1A further improved because over the side surfaces 2b at least two protective layers
- Cover layer 4 or thin-layer encapsulation 5 and cover layer 4) are applied.
- the exemplary embodiment according to FIG. 3 shows that the
- Adhesive layer 3 is arranged.
- the adhesive layer 3 is not in direct contact with the environment and is shielded from the cover layer by air and moisture. In this embodiment, since the main surface and the
- FIG 4 shows another embodiment, wherein in contrast to the embodiment of Figure 1A, the
- Adhesive layer 3 still partially covers the active layer 2 adjacent the main surface of the substrate 1. In this way, the side surfaces 2 b of the active layer 2 are complete with the thin-layer encapsulation 5 and the Encapsulated adhesive layer 3, resulting in a high protection of the side surfaces 2 b of the active layer 2 before
- the exemplary embodiment in FIG. 5 shows that the cover layer 4 is also arranged over the side surfaces of the adhesive layer 3. If the cover layer 4 comprises glass, the cover layer 4 is glued to the substrate 1 by means of glass frits. In this embodiment, the active layer 2 is at the
- hermetic protection of the active layer 2 is distinguished.
- FIG. 6A shows a variant of the embodiment according to FIG. 1A with a second adhesive layer 3a.
- the adhesive layer 3 in this embodiment covers the main surface 2c of the active layer 2, and the second adhesive layer 3a is disposed completely circumferentially around the first adhesive layer 3 and covers the portions of the thin-film encapsulant 5 covering the edges 2a and the side surfaces 2b of the active layer 2.
- the adhesive layer 3 extends beyond the edges 2a of the active layer 2, which are covered by the thin-film encapsulation 5, and is in direct contact with the environment.
- the cover layer 4 covers the main surface of the
- Adhesive layers 3 and 3a The thin-film encapsulation 5, the adhesive layers 3 and 3a and the cover layer 4 may be transparent.
- the second adhesive layer 3a may comprise an epoxy adhesive and has a better one Adhesive property as the first adhesive layer 3 and in particular may be free of getter material.
- the shear strength of the second adhesive layer is between 1 and 90 N / mm 2 , in particular between 5 and 15 N / mm 2 .
- the adhesive strength is between 1 and 20 N / mm, in particular between 3 and 10 N / mm. and thus prevents unwanted delamination of these layers.
- For the second adhesive layer 3a may also another
- Adhesive which has a high adhesive strength between the
- Cover layer 4 and the thin-film encapsulation 5 allows application find. This is particularly suitable
- the first adhesive layer 3 has an insufficient adhesive property or one of the active layers, for example, an OLED
- FIG. 6B shows a plan view of the component already shown in FIG. 6A.
- FIG. 6B shows that the active layer 2 is applied centrally over part of the main surface of the substrate 1.
- the adhesive layers 3 and 3a are disposed over the active layer 2 and cover the main surface 2c of the active layer 2, wherein the
- Adhesive layer 3a completely circumferentially the first
- Adhesive layer 3 is arranged and protrudes beyond the edges 2a of the active layer 2. A cross section along the dashed line leads to the schematic
- the exemplary embodiment according to FIG. 7 shows that the
- Cover layer 4 in addition over the side surfaces of the second Adhesive layer 3a is arranged.
- the side surfaces of the adhesive layer 3a are covered by the cover layer 4, the side surfaces 2b of the active layer 2 are better protected from moisture and air. Since the adhesive layer 3a has no getter particles and thus may not provide adequate protection
- the exemplary embodiment according to FIG. 8 shows that the
- Adhesive layer 3a still partially covers the active layer 2 adjacent the main surface of the substrate 1.
- the cover layer 4 is also arranged over the side surfaces of the adhesive layer 3a. If the cover layer 4 comprises glass, the cover layer 4 is glued to the substrate 1 by means of glass frits. Analogous to that
- Embodiments are also with reversed arrangements of the first adhesive layer 3 and the second
- Adhesive layer 3a possible.
- Thin-film encapsulation 5 and the cover layer 4 achieved by the second adhesive layer 3a achieved by the second adhesive layer 3a.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020147012539A KR102003087B1 (ko) | 2011-10-11 | 2012-10-11 | 유기 전자 부품용 캡슐 |
US14/351,090 US9601721B2 (en) | 2011-10-11 | 2012-10-11 | Encapsulation for an organic electronic device |
CN201280050098.0A CN103875090B (zh) | 2011-10-11 | 2012-10-11 | 用于有机电子器件的封装件 |
JP2014535071A JP2014532271A (ja) | 2011-10-11 | 2012-10-11 | 有機エレクトロニクスデバイスの封止部、有機エレクトロニクスデバイス、および有機エレクトロニクスデバイスを製造する方法 |
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DE102011084276.4 | 2011-10-11 | ||
DE102011084276.4A DE102011084276B4 (de) | 2011-10-11 | 2011-10-11 | Verkapselung für ein organisches elektronisches bauelement, ein organisches elektronisches bauelement mit der verkapselung und ein verfahren zur herstellung eines organischen elektronischen bauelements mit der verkapselung |
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WO2013053805A1 true WO2013053805A1 (de) | 2013-04-18 |
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PCT/EP2012/070134 WO2013053805A1 (de) | 2011-10-11 | 2012-10-11 | Verkapselung für ein organisches elektronisches bauelement |
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US (1) | US9601721B2 (de) |
JP (1) | JP2014532271A (de) |
KR (1) | KR102003087B1 (de) |
CN (1) | CN103875090B (de) |
DE (1) | DE102011084276B4 (de) |
WO (1) | WO2013053805A1 (de) |
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Also Published As
Publication number | Publication date |
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US9601721B2 (en) | 2017-03-21 |
KR102003087B1 (ko) | 2019-07-23 |
DE102011084276A1 (de) | 2013-04-11 |
JP2014532271A (ja) | 2014-12-04 |
US20140246665A1 (en) | 2014-09-04 |
CN103875090A (zh) | 2014-06-18 |
CN103875090B (zh) | 2017-08-11 |
DE102011084276B4 (de) | 2019-10-10 |
KR20140083019A (ko) | 2014-07-03 |
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