Organic light-emitting device and method for producing an organic light-emitting device

Abstract

Organic light-emitting component (10), comprising - a first electrode (20), - an organic functional layer structure (22) above the first electrode for generating light, - a second electrode (23) above the organic functional layer structure (22), wherein the organic functional layer structure (22) comprises at least one layer with an organic carrier material having a first refractive index and with nano-additives embedded in the carrier material and having a second refractive index that is greater than the first refractive index, and having at least one external dimension that is less than a quarter of a predetermined wavelength of the generated light, and wherein an electron injection layer of the organic functional layer structure (22) comprises the layer with the carrier material and the nano-additives or is formed therefrom.

Description

[0001] The invention relates to an organic light-emitting component and a method for producing an organic light-emitting component.

[0002] Organic-based optoelectronic components, such as organic light-emitting diodes (OLEDs), are finding increasingly widespread use in general lighting, for example, as area light sources. An organic light-emitting component, such as an OLED, can have an anode and a cathode with an organic functional layer system between them.The organic functional layer system can have one or more emitter layers in which electromagnetic radiation is generated, a charge carrier pair generation layer structure each comprising two or more charge carrier pair generation layers (“charge generating layer” (CGL), as well as one or more electron blocking layers, also referred to as hole transport layers (“hole transport layer” - HTL), and one or more hole blocking layers, also referred to as electron transport layer(s) (“electron transport layer” - ETL), to direct the current flow.

[0003] In high-performance OLEDs, the microcavity effect is exploited to optimize the emission spectrum and / or efficiency of the OLED. To this end, the optical path between an emission zone of the light generated by the OLED and the fully or partially reflective electrodes is adjusted to a well-defined value according to the wavelength of the light. The optical path is determined by the product of the refractive index and the thickness of the layer(s) through which the light passes.

[0004] Since the refractive index of the organic materials used in OLEDs is usually predetermined and, for example, is approximately 1.8, the optical path length is adjusted via the thickness of one or more organic layers of the organic layer stack. To achieve an optical path length sufficient for setting the optimal microcavity, relatively thick organic layers are often used. However, since the organic semiconductor materials account for a significant portion of the overall OLED cost, this is associated with considerable costs.

[0005] The document DE 101 64 016 A1 describes an organic light-emitting diode (OLED) and a method for its production.

[0006] The document US 6 853 013 B2 describes a light-emitting element and a method for its production.

[0007] The publication WO 2003 / 084 292 A1 describes a light-emitting component containing semiconductor nanocrystals.

[0008] The document EP 2 226 867 A2 describes an organic electroluminescent device.

[0009] The document US 8 088 499 B1 describes an optoelectronic component with nanoparticles embedded in a hole injection / transport layer.

[0010] The document JP 2007 - 242 927 A describes a light-emitting component and a manufacturing method for a light-emitting component.

[0011] In various embodiments, an organic light-emitting component is provided which is simple and / or inexpensive to produce and / or which has a small thickness and / or which has an optical property which can be precisely adjusted in a simple manner.

[0012] In various embodiments, a method for producing an organic light-emitting component is provided which is simple and / or inexpensive to carry out and / or which enables the organic light-emitting component to be produced with a small thickness and / or which enables an optical property of the organic light-emitting component to be precisely adjusted in a simple manner.

[0013] An organic light-emitting component is provided. The organic light-emitting component has a first electrode. An organic functional layer structure for generating light is formed over the first electrode. A second electrode is formed over the organic functional layer structure. The organic functional layer structure has at least one layer with an organic carrier material having a first refractive index. The layer has nanoadditives embedded in the carrier material and having a second refractive index that is greater than the first refractive index. The nanoadditives have at least one external dimension that is less than a quarter of a predetermined wavelength of the generated light.

[0014] Using the layer containing the carrier material and the nanoadditives, the optical path length, as the product of refractive index and layer thickness, can be optimally adjusted for a microcavity of the organic light-emitting component. To this end, the refractive index of one or more layers of the organic functional layer structure is increased by adding nanoadditives with a high refractive index. The optimal optical path length for the microcavity can thus be achieved with only thin organic layers, without the use of thick organic layers. This can help save material for the organic light-emitting component and thus keep the costs of the organic light-emitting component low.Furthermore, an optical path length of the generated light in the organic light-emitting component, for example from an emission zone of the light to one of the electrodes, and / or the position and / or the size of the microcavity can be adjusted very precisely in a simple manner.

[0015] The effective refractive index of the corresponding layer is thus increased to a value which, depending on the volume fraction of the nano-additives in the carrier material, lies between the refractive index of the carrier material and the refractive index of the nanoparticle material. The carrier material is, for example, the organic material responsible for the function of the corresponding layer of the organic functional layer structure. The external dimensions, for example the diameter and / or one side length, of the nanoparticles can be smaller than the thickness of the corresponding layer and / or so small that there is no or only negligible scattering effect with the generated light. For example, the corresponding external dimensions can lie in a range, for example between 0.1 nm and 20 nm, for example between 1 nm and 10 nm.

[0016] The light generated by the organic light-emitting component can, for example, be in the visible spectral range, for example, at wavelengths from approximately 380 nm to approximately 780 nm. However, the organic light-emitting component can optionally also generate electromagnetic radiation in the non-visible spectral range, for example, in the UV and / or infrared light range. If the organic light-emitting component generates white light, the corresponding light spectrum can exhibit several local maxima, in other words, peaks, at different locations.If the organic light-emitting device generates monochrome light, the corresponding light spectrum generally has a maximum at a corresponding position, for example between approximately 420 nm and 480 nm for a blue light-emitting organic light-emitting device or, for example, between approximately 480 nm and 560 nm for a green light-emitting organic light-emitting device.

[0017] In various embodiments, the predetermined wavelength is a dominant wavelength of the generated light.

[0018] In various embodiments, the predetermined wavelength is a shortest dominant wavelength or a longest dominant wavelength of the generated light. For an organic light-emitting component that emits green light, the dominant wavelength may be, for example, 555 nm. For an organic light-emitting component that emits white light, the shortest dominant wavelength may be, for example, in the blue spectral range and be, for example, approximately 460 nm, and / or the longest dominant wavelength may be, for example, in the yellow spectral range and / or be, for example, approximately 570 nm.

[0019] In various embodiments, the nanoadditives comprise nanoparticles, nanowires, nanodots and / or nanotubes.

[0020] In various embodiments, the first refractive index is in a range between 1.6 and 1.8 and / or the second refractive index is in a range between 2.1 and 2.5.

[0021] In various embodiments, the nanoadditives comprise TiO2, Nb2O5, HfO2, ZrO2, and / or ZnS. For example, the nanoadditives may comprise TiO2 with a refractive index ranging, for example, from 2.4 to 3, ZrO2 with a refractive index of, for example, approximately 2.18, Nb2O5 with a refractive index of, for example, approximately 2.3, HfO2 with a refractive index ranging, for example, from approximately 1.9 to approximately 2.0, ZrO2 with a refractive index of, for example, approximately 2.2, or ZnS with a refractive index of, for example, approximately 2.37.

[0022] In various embodiments, the carrier material comprises a solution-processed organic semiconductor material.

[0023] In various embodiments, the carrier material comprises a polymer or soluble small molecules. The term "small" in this context does not necessarily refer to the size of the molecules themselves, but rather to a class of molecules that are regularly used for organic layers in OLEDs. The corresponding OLEDs are also referred to as SMOLEDs in this context.

[0024] The use of solution-processed organic semiconductors, such as polymers or soluble small molecules, can contribute to the particularly simple and / or cost-effective production of the organic light-emitting component. In this case, the nanoparticles can be applied from solution together with the organic material. For improved processability, nanoadditives with appropriate surface functionalization can also be used, enabling their solubility in the selected solvent.

[0025] An electron-injection layer of the organic functional layer structure comprises or is formed from the layer containing the support material and the nanoadditives. In other words, the electron-injection layer can comprise a support material corresponding to the respective function of the layer and the nanoadditives for adjusting the overall refractive index of the respective layer.

[0026] In various embodiments, a hole-injection layer, a hole-transport layer, an electron-transport layer, and / or an emitter layer of the organic functional layer structure comprises or is formed from the layer with the carrier material and the nanoadditives. In other words, each individual layer or several of the aforementioned layers can comprise a carrier material corresponding to the respective function of the layer and the nanoadditives for adjusting the overall refractive index of the respective layer.

[0027] In various embodiments, the nanoadditives, the material of the nanoadditives, an external dimension of the nanoadditives, a ratio of the nanoadditives to the carrier material in the layer, and / or a proportion of the nanoadditives relative to the carrier material of the layer are selected and / or specified depending on a predetermined optical property of the organic light-emitting component. The predetermined optical property can, for example, be an optical path length in the organic light-emitting component. For example, the predetermined optical property can be the optical path length from an emission zone of the organic functional layer structure to one of the electrodes. Alternatively or additionally, the optical property can be a size of a microcavity of the organic light-emitting component.

[0028] In various embodiments, the first electrode is formed. The organic functional layer structure is formed over the first electrode for generating light. The second electrode is formed over the organic functional layer structure. The organic functional layer structure is formed such that it comprises at least the layer with the organic carrier material having the first refractive index and with nano-additives embedded in the carrier material, which have the second refractive index that is greater than the first refractive index, and which have at least one external dimension that is less than a quarter of the predetermined wavelength of the generated light.

[0029] In various embodiments, the carrier material is applied to the first electrode in a liquid state, wherein the nanoadditives are dissolved or dispersed in the liquid carrier material.

[0030] The use of solution-processed organic semiconductors, such as polymers or soluble small molecules, can contribute to the particularly simple and / or cost-effective production of the organic light-emitting component. In this case, the nanoparticles can be applied from solution together with the organic material. For improved processability, nanoadditives with appropriate surface functionalization can also be used, enabling their solubility in the selected solvent.

[0031] In various embodiments, the nanoadditives, the material of the nanoadditives, an external dimension of the nanoadditives, a ratio of the nanoadditives to the carrier material in the layer, and / or a proportion of the nanoadditives relative to the carrier material of the layer are selected and / or specified depending on a predetermined optical property of the organic light-emitting component. In other words, an optical property that the organic light-emitting component is to have is first specified, and the nanoadditives, the material of the nanoadditives, an external dimension of the nanoadditives, a ratio of the nanoadditives to the carrier material in the layer, and / or a proportion of the nanoadditives relative to the carrier material of the layer are then selected such that the finished organic light-emitting component has the originally predetermined optical property.

[0032] In various embodiments, the predetermined optical property is an optical path length in the organic light-emitting component, in particular for the light generated by the organic light-emitting component.

[0033] In various embodiments, the predetermined optical property is the optical path length from an emission zone of the organic functional layer structure to one of the electrodes. The emission zone is located, for example, in an emitter layer of the OLED. For example, the emission zone is located in the center of the emitter layer.

[0034] In various embodiments, the optical property is a size of a microcavity of the organic light-emitting device.

[0035] A microcavity is essentially formed by two partially transmissive mirrors, such as the two electrodes, and the distance and optical medium between them, such as the organic functional layer structure. The thickness of the microcavity depends on the reflectivity of the corresponding mirrors. The size of the microcavity describes the optical path length between the mirrors and determines the wavelength(s) to which the microcavity is resonant.

[0036] In particular, the microcavity is formed by the two electrodes and the organic functional layer structure in between, whereby the optical path length between the electrodes is adjusted accordingly in order to adapt the microcavity as desired.

[0037] Embodiments of the invention are illustrated in the figures and are explained in more detail below.

[0038] They show: Fig. 1 a conventional organic light-emitting device; Fig. 2 a layer structure of the conventional organic light-emitting device; Fig. 3 shows a layer structure of a comparative example of an organic light-emitting device; Fig. 4 shows a layer structure of a comparative example of an organic light-emitting device; Fig. 5 shows a layer structure of a comparative example of an organic light-emitting device; Fig. 6 a flow diagram of an embodiment of a method for producing an organic light-emitting component.

[0039] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology such as "top," "bottom," "front," "back," "fore," "rear," etc., is used with reference to the orientation of the described figure(s). Since components of embodiments can be positioned in a number of different orientations, the directional terminology is for purposes of illustration and is in no way limiting. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention.It is understood that the features of the various embodiments described herein may be combined with one another unless specifically stated otherwise. The following detailed description is therefore not to be construed in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0040] Throughout this description, the terms "connected," "attached," and "coupled" are used to describe both a direct and an indirect connection, a direct or indirect connection, and a direct or indirect coupling. In the figures, identical or similar elements are provided with identical reference numerals where appropriate.

[0041] In various embodiments, an organic light-emitting component can be an organic light-emitting semiconductor component, an organic light-emitting diode, and / or an organic light-emitting transistor. The organic light-emitting component can be part of an integrated circuit. Furthermore, a plurality of organic light-emitting components can be provided, for example, housed in a common housing.

[0042] Fig. Figure 1 shows a conventional organic light-emitting component 1. The conventional organic light-emitting component 1 comprises a carrier 12, for example, a substrate. An optoelectronic layer structure is formed on the carrier 12.

[0043] The optoelectronic layer structure has a first electrode layer 14, which has a first contact section 16, a second contact section 18, and a first electrode 20. The second contact section 18 is electrically coupled to the first electrode 20 of the optoelectronic layer structure. The first electrode 20 is electrically insulated from the first contact section 16 by means of an electrical insulation barrier 21. An organic functional layer structure 22 of the optoelectronic layer structure is formed above the first electrode 20. The organic functional layer structure 22 can, for example, have one, two, or more sublayers, as described further below with reference to Fig. 3. A second electrode 23 of the optoelectronic layer structure is formed above the organic functional layer structure 22 and is electrically coupled to the first contact section 16. The first electrode 20 serves, for example, as the anode or cathode of the optoelectronic layer structure. The second electrode 23 serves, corresponding to the first electrode, as the cathode or anode of the optoelectronic layer structure.

[0044] An encapsulation layer 24 of the optoelectronic layer structure is formed above the second electrode 23 and partially above the first contact section 16 and partially above the second contact section 18, which encapsulates the optoelectronic layer structure. A first recess of the encapsulation layer 24 is formed in the encapsulation layer 24 above the first contact section 16, and a second recess of the encapsulation layer 24 is formed above the second contact section 18. A first contact region 32 is exposed in the first recess of the encapsulation layer 24, and a second contact region 34 is exposed in the second recess of the encapsulation layer 24. The first contact region 32 serves to electrically contact the first contact section 16, and the second contact region 34 serves to electrically contact the second contact section 18.

[0045] An adhesive layer 36 is formed over the encapsulation layer 24. A cover body 38 is formed over the adhesive layer 36. The adhesive layer 36 serves to attach the cover body 38 to the encapsulation layer 24.

[0046] Fig. 2 shows a layer structure of a conventional organic light-emitting component, for example the organic light-emitting component 1 explained above, wherein the contact regions 32, 34 and the contact sections 16, 18 are not shown in this view.

[0047] The organic functional layer structure 22 may comprise a hole transport layer 40, an emitter layer 42, an electron transport layer 44 and / or an electron injection layer (not shown) and / or a hole injection layer (not shown).

[0048] In order to adjust a microcavity of the conventional organic light-emitting component 1 and to adjust an optical path length between an emission zone located in the region of the emitter layer 42, for example in a central region of the emitter layer 42, and one of the electrodes 20, 23, the electron transport layer 44 has a large thickness.

[0049] Fig. 3 shows a detailed sectional view of a layer structure of a comparative example of an organic light-emitting component 10, which may, for example, largely correspond to the conventional organic light-emitting component 1 explained above.

[0050] The organic light-emitting component 10 can be configured as a top emitter and / or a bottom emitter. If the organic light-emitting component 10 is configured as a top emitter, the first electrode 20 can be reflective. If the organic light-emitting component 10 is configured as a bottom emitter, the second electrode 23 can be reflective. If the organic light-emitting component 10 is configured as a top emitter and a bottom emitter, the organic functional component 10 can be referred to as an optically transparent component, for example, a transparent organic light-emitting diode.

[0051] The organic light-emitting component 10 has the carrier 12 and an active region above the carrier 12. A first barrier layer (not shown), for example a first barrier thin film, can be formed between the carrier 12 and the active region. The active region has the first electrode 20, the organic functional layer structure 22, and the second electrode 23. The encapsulation layer 24 is formed above the active region. The encapsulation layer 24 can be formed as a second barrier layer, for example as a second barrier thin film. The cover body 38 is arranged above the active region and optionally above the encapsulation layer 24. The cover body 38 can be arranged on the encapsulation layer 24, for example, by means of the adhesive layer 36.

[0052] The active region is an electrically and / or optically active region. The active region is, for example, the region of the organic light-emitting component 10 in which electrical current flows to operate the organic light-emitting component 10 and / or in which light is generated.

[0053] The organic functional layer structure 22 can have one, two, or more functional layer structure units and one, two, or more intermediate layers between the layer structure units. Optionally, each of the functional layer structure units can be formed according to an embodiment of the organic functional layer structure 22 explained below.

[0054] The carrier 12 can be translucent or transparent. The carrier 12 serves as a carrier element for electronic elements or layers, for example light-emitting elements. The carrier 12 can, for example, comprise or be formed from glass, quartz, and / or a semiconductor material or any other suitable material. Furthermore, the carrier 12 can comprise or be formed from a plastic film or a laminate with one or more plastic films. The plastic can comprise one or more polyolefins. Furthermore, the plastic can comprise polyvinyl chloride (PVC), polystyrene (PS), polyester and / or polycarbonate (PC), polyethylene terephthalate (PET), polyethersulfone (PES) and / or polyethylene naphthalate (PEN). The carrier 12 can comprise or be formed from a metal, for example copper, silver, gold, platinum, iron, for example a metal compound, for example steel.The carrier 12 can be formed as a metal foil or a metal-coated foil. The carrier 12 can be part of a mirror structure or form one. The carrier 12 can have a mechanically rigid region and / or a mechanically flexible region, or can be formed in such a manner.

[0055] The first electrode 20 can be configured as an anode or a cathode. The first electrode 20 can be translucent or transparent. The first electrode 20 comprises an electrically conductive material, for example, metal and / or a conductive transparent oxide (TCO) or a layer stack of multiple layers comprising metals or TCOs. The first electrode 20 can, for example, comprise a layer stack of a combination of a layer of a metal on a layer of a TCO, or vice versa. Examples are a silver layer applied to an indium tin oxide (ITO) layer (Ag on ITO), or ITO-Ag-ITO multilayers.

[0056] Metals that can be used include Ag, Pt, Au, Mg, Al, Ba, In, Ca, Sm or Li, as well as compounds, combinations or alloys of these materials.

[0057] Transparent conductive oxides are transparent, conductive materials, for example, metal oxides such as zinc oxide, tin oxide, cadmium oxide, titanium oxide, indium oxide, or indium tin oxide (ITO). In addition to binary metal-oxygen compounds such as ZnO, SnO2, or In2O3, they also include ternary metal-oxygen compounds such as AlZnO, Zn2SnO4, CdSnO3, ZnSnO3, MgIn2O4, GaInO3, Zn2In2O5, or In4Sn3O. 12 or mixtures of different transparent conductive oxides belong to the group of TCOs.

[0058] The first electrode 20 can alternatively or additionally comprise the following materials: networks of metallic nanowires and particles, for example, made of Ag; networks of carbon nanotubes, graphene particles and layers; and / or networks of semiconducting nanowires. For example, the first electrode 20 can comprise or be formed from one of the following structures: a network of metallic nanowires, for example, made of Ag, combined with conductive polymers; a network of carbon nanotubes combined with conductive polymers; and / or graphene layers and composites. Furthermore, the first electrode 20 can comprise electrically conductive polymers or transition metal oxides.

[0059] The first electrode 20 can, for example, have a layer thickness in a range from 10 nm to 500 nm, for example from 25 nm to 250 nm, for example from 50 nm to 100 nm.

[0060] The first electrode 20 can have a first electrical terminal to which a first electrical potential can be applied. The first electrical potential can be provided by an energy source (not shown), for example, a current source or a voltage source. Alternatively, the first electrical potential can be applied to the carrier 12 and indirectly supplied to the first electrode 20 via the carrier 12. The first electrical potential can, for example, be the ground potential or another predetermined reference potential.

[0061] The organic functional layer structure 22 may comprise the hole transport layer 40, the emitter layer 42, the electron transport layer 44 and / or the hole injection layer (not shown) and / or the electron injection layer (not shown).

[0062] The hole injection layer may be formed on or above the first electrode 20. The hole injection layer may comprise or be formed from one or more of the following materials: HAT-CN, Cu(I)pFBz, MoOx, WOx, VOx, ReOx, F4-TCNQ, NDP-2, NDP-9, Bi(III)pFBz, F16CuPc; NPB (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)benzidine); beta-NPB N,N'-bis(naphthalen-2-yl)-N,N'-bis(phenyl)benzidine); TPD (N,N'-bis(3-methylphenyl)-N,N'-bis(phenyl)benzidine); spiro TPD (N,N'-bis(3-methylphenyl)-N,N'-bis(phenyl)benzidine); Spiro-NPB (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)-spiro); DMFL-TPD N,N'-bis(3-methylphenyl)-N,N'-bis(phenyl)-9,9-dimethylfluorene); DMFL-NPB (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)-9,9-dimethylfluorene); DPFL-TPD (N,N'-bis(3-methylphenyl)-N,N'-bis(phenyl)-9,9-diphenylfluorene); DPFL-NPB (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)-9,9-diphenylfluorene); Spiro-TAD (2,2',7,7'-tetrakis(n,n-diphenylamino)-9,9'-spirobifluorene);9,9-Bis[4-(N,N-bis-biphenyl-4-yl-amino)phenyl]-9H-fluorene; 9,9-Bis[4-(N,N-bis-naphthalen-2-yl-amino)phenyl]-9H-fluorene; 9,9-Bis[4-(N,N'-bis-naphthalen-2-yl-N,N'-bis-phenyl-amino)-phenyl]-9H-fluorene; N,N'-bis(phenanthren-9-yl)-N,N'-bis(phenyl)-benzidine; 2,7-Bis[N,N-bis(9,9-spiro-bifluorene-2-yl)-amino]-9,9-spiro-bifluorene; 2,2'-Bis[N,N-bis(biphenyl-4-yl)amino]9,9-spiro-bifluorene; 2,2'-bis(N,N-diphenylamino)9,9-spirobifluorene; di-[4-(N,N-ditolylamino)phenyl]cyclohexane; 2,2',7,7'-tetra(N,N-ditolyl)amino-spirobifluorene; and / or N,N,N',N'-tetra-naphthalen-2-yl-benzidine.;

[0063] The hole injection layer may have a layer thickness in a range of approximately 10 nm to approximately 1000 nm, for example in a range of approximately 30 nm to approximately 300 nm, for example in a range of approximately 50 nm to approximately 200 nm.

[0064] The hole transport layer 40 can be formed on or above the hole injection layer. The hole transport layer 40 can comprise or be formed from one or more of the following materials: NPB (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)benzidine); beta-NPB N,N'-bis(naphthalen-2-yl)-N,N'-bis(phenyl)benzidine); TPD (N,N'-bis(3-methylphenyl)-N,N'-bis(phenyl)benzidine); spiro TPD (N,N'-bis(3-methylphenyl)-N,N'-bis(phenyl)benzidine); spiro-NPB (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)spiro); DMFL-TPD N,N'-bis(3-methylphenyl)-N,N'-bis(phenyl)-9,9-dimethylfluorene); DMFL-NPB (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)-9,9-dimethylfluorene); DPFL-TPD (N,N'-bis(3-methylphenyl)-N,N'-bis(phenyl)-9,9-diphenylfluorene); DPFL-NPB (N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)-9,9-diphenylfluorene); Spiro-TAD (2,2',7,7'-tetrakis(n,n-diphenylamino)-9,9'-spirobifluorene); 9,9-Bis[4-(N,N-bis-biphenyl-4-yl-amino)phenyl]-9H-fluorene;9,9-Bis[4-(N,N-bis-naphthalen-2-yl-N,N'-bis-phenyl-amino)-phenyl]-9H-fluorene; 9,9-Bis[4-(N,N'-bis-naphthalen-2-yl-N,N'-bis-phenyl-amino)-phenyl]-9H-fluoro; N,N' bis(phenanthren-9-yl)-N,N'-bis(phenyl)-benzidine; 2,7-Bis[N,N-bis(9,9-spiro-bifluorene-2-yl)-amino]-9,9-spiro-bifluorene; 2,2'-Bis[N,N-bis(biphenyl-4-yl)amino]9,9-spiro-bifluorene; 2,2'-Bis(N,N-di-phenyl-amino)9,9-spiro-bifluorene; Di-[4-(N,N-ditolyl-amino)-phenyl]cyclohexane; 2,2',7,7'-tetra(N,N-di-tolyl)amino-spiro-bifluorene; and N,N,N',N'-tetra-naphthalen-2-yl-benzidine.

[0065] The hole transport layer 40 may have a layer thickness in a range of approximately 5 nm to approximately 50 nm, for example in a range of approximately 10 nm to approximately 30 nm, for example approximately 20 nm.

[0066] One or more emitter layers 42 can be formed on or above the hole transport layer 40, for example with fluorescent and / or phosphorescent emitters.

[0067] The emitter layer 42 may comprise organic polymers, organic oligomers, organic monomers, organic small, non-polymeric molecules ("small molecules"), or a combination of these materials. The emitter layer 42 may comprise or be formed from one or more of the following materials: organic or organometallic compounds, such as derivatives of polyfluorene, polythiophene, and polyphenylene (e.g.,2- or 2,5-substituted poly-p-phenylenevinylene) as well as metal complexes, for example iridium complexes such as blue phosphorescent FIrPic (bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)-iridium III), green phosphorescent Ir(ppy)3 (tris(2-phenylpyridine)iridium III), red phosphorescent Ru (dtb-bpy)3*2(PF6) (tris[4,4'-di-tert-butyl-(2,2')-bipyridine]ruthenium(III) complex) as well as blue fluorescent DPAVBi (4,4-bis[4-(di-p-tolylamino)styryl]biphenyl), green fluorescent TTPA (9,10-bis[N,N-di-(p-tolyl)-amino]anthracene) and red-fluorescent DCM2 (4-dicyanomethylene)-2-methyl-6-julolidyl-9-enyl-4H-pyran) as non-polymeric emitters. Such non-polymeric emitters can be deposited, for example, by thermal evaporation. Furthermore, polymer emitters can be used, which can be deposited, for example, by a wet-chemical process, such as spin coating.The emitter materials can be suitably embedded in a matrix material, for example a technical ceramic or a polymer, for example an epoxy, or a silicone.

[0068] The first emitter layer 42 may have a layer thickness in a range of approximately 5 nm to approximately 50 nm, for example in a range of approximately 10 nm to approximately 30 nm, for example approximately 20 nm.

[0069] The emitter layer 42 can have emitter materials that emit light in a single color or in different colors (for example, blue and yellow or blue, green, and red). Alternatively, the emitter layer 42 can have multiple sublayers that emit light of different colors. By mixing the different colors, the emission of light with a white color impression can result. Alternatively or additionally, it can be provided to arrange a converter material in the beam path of the primary emission generated by these layers, which converter material at least partially absorbs the primary radiation and emits secondary radiation of a different wavelength, so that, for example, a (not yet white) primary radiation results in a white color impression through the combination of primary radiation and secondary radiation.

[0070] The electron transport layer 44 can be formed, for example, deposited, on or above the emitter layer 42. The electron transport layer 44 comprises a carrier material and nanoadditives embedded in the carrier material.

[0071] The carrier material has a first refractive index, for example, a first refractive index in a range between, for example, 1.6 and 1.9, for example, between 1.7 and 1.8. The carrier material can, for example, comprise a solution-processed organic semiconductor material. The carrier material can, for example, comprise a polymer or soluble small molecules. The carrier material can comprise or be formed from one or more of the following materials: NET-18; 2,2',2" -(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole); 2-(4-Biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole,2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP); 8-Hydroxyquinolinolato-lithium, 4-(Naphthalen-1-yl)-3,5-diphenyl-4H-1,2,4-triazole; 1,3-bis[2-(2,2'-bipyridine-6-yl)-1,3,4-oxadiazo-5-yl]benzene; 4,7-diphenyl-1,10-phenanthroline (BPhen); 3-(4-Biphenylyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole; bis(2-methyl-8-quinolinolate)-4-(phenylphenolato)aluminum;6,6'-Bis[5-(biphenyl-4-yl)-1,3,4-oxadiazo-2-yl]-2,2'-bipyridyl; 2-phenyl-9,10-di(naphthalen-2-yl)anthracene; 2,7-Bis[2-(2,2'-bipyridine-6-yl)-1,3,4-oxadiazo-5-yl]-9,9-dimethylfluorene; 1,3-Bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene; 2-(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline; 2,9-Bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline; Tris(2,4,6-trimethyl-3-(pyridin-3-yl)phenyl)borane; 1-methyl-2-(4-(naphthalen-2-yl)phenyl)-1H-imidazo[4,5-f][1,10]phenanthroline; phenyl-dipyrenylphosphine oxide; naphthalenetetracarboxylic dianhydride or its imides; perylenetetracarboxylic dianhydride or its imides; and substances based on siloles with a silacyclopentadiene unit.

[0072] The nanoadditives comprise, for example, nanoparticles, nanowires, nanodots, and / or nanotubes. The nanoadditives can have a second refractive index that is greater than the first refractive index. The second refractive index can range, for example, from 2.1 to 2.5. The nanoadditives have at least one external dimension that is less than a quarter of a predetermined wavelength of the generated light. The external dimension can be, for example, a diameter and / or a side length. The predetermined wavelength can be, for example, a dominant wavelength of the generated light. For example, the predetermined wavelength can be a shortest dominant wavelength or a longest dominant wavelength of the generated light.The predetermined wavelength may, for example, be in the visible spectral range, for example in the range from approximately 380 nm to approximately 780 nm, for example in the green spectral range from approximately 480 nm to approximately 560 nm, for example at approximately 555 nm, or for example in the blue spectral range from approximately 420 nm to approximately 480 nm, for example at approximately 460 nm.

[0073] Alternatively or additionally, the outer dimension may be smaller than a thickness of the electron-transport layer 44. For example, the thickness may be in a range, for example, between 0.1 and 20 nm, for example, between 1 nm and 10 nm. The nanoadditives may include, for example, TrO2, Nb2O5, HfO2, ZrO2, and / or ZnS.

[0074] The electron transport layer 44 may have a layer thickness in a range of approximately 5 nm to approximately 50 nm, for example in a range of approximately 10 nm to approximately 30 nm, for example approximately 20 nm.

[0075] The electron injection layer may be formed on or above the electron transport layer 44. The electron injection layer may comprise or be formed from one or more of the following materials: NDN-26, MgAg, Cs2CO3, Cs3PO4, Na, Ca, K, Mg, Cs, Li, LiF; 2,2',2" -(1,3,5-Benzinetriyl)-tris(1-phenyl-1-H-benzimidazole); 2-(4-Biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole,2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP); 8-Hydroxyquinolinolato-lithium, 4-(Naphthalen-1-yl)-3,5-diphenyl-4H-1,2,4-triazole; 1,3-bis[2-(2,2'-bipyridine-6-yl)-1,3,4-oxadiazo-5-yl]benzene; 4,7-diphenyl-1,10-phenanthroline (BPhen); 3-(4-Biphenylyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole; bis(2-methyl-8-quinolinolate)-4-(phenylphenolato)aluminum; 6,6'-Bis[5-(biphenyl-4-yl)-1,3,4-oxadiazo-2-yl]-2,2'-bipyridyl; 2-phenyl-9,10-di(naphthalen-2-yl)anthracene; 2,7-Bis[2-(2,2'-bipyridine-6-yl)-1,3,4-oxadiazo-5-yl]-9,9-dimethylfluorene;1,3-Bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene; 2-(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline; 2,9-Bis(naphthalen-2-yl)-4,7-diphenyl-1,10-phenanthroline; Tris(2,4,6-trimethyl-3-(pyridin-3-yl)phenyl)borane; 1-methyl-2-(4-(naphthalen-2-yl)phenyl)-1H-imidazo[4,5-f][1,10]phenanthroline; Phenyl-dipyrenylphosphine oxide; Naphthalenetetracarboxylic dianhydride or its imides; Perylenetetracarboxylic dianhydride or its imides; and substances based on siloles with a silacyclopentadiene unit.

[0076] The electron injection layer may have a layer thickness in a range of approximately 5 nm to approximately 200 nm, for example in a range of approximately 20 nm to approximately 50 nm, for example approximately 30 nm.

[0077] In an organic functional layer structure 22 with two or more organic functional layer structure units, corresponding intermediate layers can be formed between the organic functional layer structure units. The organic functional layer structure units can each be formed individually according to an embodiment of the organic functional layer structure 22 explained above. The intermediate layer can be formed as an intermediate electrode. The intermediate electrode can be electrically connected to an external voltage source. The external voltage source can, for example, provide a third electrical potential at the intermediate electrode. However, the intermediate electrode can also have no external electrical connection, for example by the intermediate electrode having a floating electrical potential.

[0078] The organic functional layer structure unit can, for example, have a layer thickness of a maximum of approximately 3 µm, for example a layer thickness of a maximum of approximately 1 µm, for example a layer thickness of a maximum of approximately 300 nm.

[0079] The organic light-emitting component 10 may optionally comprise further functional layers, for example arranged on or above the one or more emitter layers or on or above the electron transport layer 44. The further functional layers may, for example, be internal or external coupling-out structures that can further improve the functionality and thus the efficiency of the organic light-emitting component 10.

[0080] The second electrode 23 can be configured according to one of the embodiments of the first electrode 20, wherein the first electrode 20 and the second electrode 23 can be configured identically or differently. The second electrode 23 can be configured as an anode or as a cathode. The second electrode 23 can have a second electrical terminal to which a second electrical potential can be applied. The second electrical potential can be provided by the same or a different energy source as the first electrical potential. The second electrical potential can be different from the first electrical potential.The second electrical potential may, for example, have a value such that the difference to the first electrical potential has a value in a range from approximately 1.5 V to approximately 20 V, for example a value in a range from approximately 2.5 V to approximately 15 V, for example a value in a range from approximately 3 V to approximately 12 V.

[0081] The encapsulation layer 24 can also be referred to as thin-film encapsulation. The encapsulation layer 24 can be formed as a translucent or transparent layer. The encapsulation layer 24 forms a barrier against chemical contaminants or atmospheric substances, in particular against water (moisture) and oxygen. In other words, the encapsulation layer 24 is formed such that it cannot be penetrated by substances that can damage the organic light-emitting component 10, for example, water, oxygen, or solvents, or can only be penetrated to a very small extent. The encapsulation layer 24 can be formed as a single layer, a layer stack, or a layer structure.

[0082] The encapsulation layer 24 may comprise or be formed from: aluminum oxide, zinc oxide, zirconium oxide, titanium oxide, hafnium oxide, tantalum oxide, lanthanum oxide, silicon oxide, silicon nitride, silicon oxynitride, indium tin oxide, indium zinc oxide, aluminum-doped zinc oxide, poly(p-phenylene terephthalamide), nylon 66, and mixtures and alloys thereof.

[0083] The encapsulation layer 24 may have a layer thickness of approximately 0.1 nm (one atomic layer) to approximately 1000 nm, for example a layer thickness of approximately 10 nm to approximately 100 nm, for example approximately 40 nm. The encapsulation layer 24 may comprise a high-index material, for example one or more materials with a high refractive index, for example with a refractive index of 1.5 to 3, for example from 1.7 to 2.5, for example from 1.8 to 2.

[0084] If necessary, the first barrier layer on the carrier 12 can be formed corresponding to a configuration of the encapsulation layer 24.

[0085] The encapsulation layer 24 can be formed, for example, by means of a suitable deposition method, e.g., by means of an atomic layer deposition (ALD) method, e.g., a plasma-enhanced atomic layer deposition (PEALD) method or a plasma-less atomic layer deposition (PLALD) method, or by means of a chemical vapor deposition (CVD) method, e.g., a plasma-enhanced chemical vapor deposition (PECVD) method or a plasma-less chemical vapor deposition (PLCVD) method, or, alternatively, by means of other suitable deposition methods.

[0086] Optionally, an input or output coupling layer can be formed, for example, as an external film (not shown) on the carrier 12 or as an internal output coupling layer (not shown) in the layer cross-section of the organic light-emitting component 10. The input / output coupling layer can have a matrix and scattering centers distributed therein, wherein the average refractive index of the input / output coupling layer is greater than the average refractive index of the layer from which the light is provided. Furthermore, one or more anti-reflective layers can additionally be formed.

[0087] The adhesive layer 36 can comprise, for example, an adhesive, such as an adhesive, such as a laminating adhesive, and / or lacquer and / or a resin, by means of which the cover body 38 is arranged, for example, glued, on the encapsulation layer 24. The adhesive layer 36 can be transparent or translucent. The adhesive layer 36 can comprise, for example, light-scattering particles. As a result, the adhesive layer 36 can act as a scattering layer and contribute to good color angle distortion and high output efficiency.

[0088] Dielectric scattering particles, for example made of a metal oxide, such as silicon oxide (SiO2), zinc oxide (ZnO), zirconium oxide (ZrO2), indium tin oxide (ITO) or indium zinc oxide (IZO), gallium oxide (Ga2Ox), aluminum oxide, or titanium oxide, can be provided as light-scattering particles. Other particles may also be suitable, provided they have a refractive index that differs from the effective refractive index of the matrix of the adhesive layer 36, for example, air bubbles, acrylate, or hollow glass spheres. Furthermore, metallic nanoparticles, metals such as gold, silver, iron nanoparticles, or the like, can be provided as light-scattering particles.

[0089] The adhesive layer 36 can have a layer thickness greater than 1 µm, for example, a layer thickness of several µm. In various embodiments, the adhesive can be a lamination adhesive.

[0090] The adhesive layer 36 may have a refractive index that is lower than the refractive index of the cover body 38. The adhesive layer 36 may, for example, comprise a low-refractive-index adhesive, such as an acrylate, which has a refractive index of approximately 1.3. However, the adhesive layer 36 may also comprise a high-refractive-index adhesive, which, for example, comprises high-refractive-index, non-scattering particles and which has a layer-thickness-averaged refractive index that approximately corresponds to the average refractive index of the organically functional layer structure 22, for example in a range from approximately 1.6 to 2.5, for example from 1.7 to approximately 2.0.

[0091] A so-called getter layer or getter structure, i.e. a laterally structured getter layer (not shown), can be arranged on or above the active region. The getter layer can be translucent, transparent, or opaque. The getter layer can comprise or be formed from a material that absorbs and binds substances that are harmful to the active region. A getter layer can, for example, comprise or be formed from a zeolite derivative. The getter layer can have a layer thickness greater than 1 µm, for example a layer thickness of several µm. In various embodiments, the getter layer can comprise a lamination adhesive or be embedded in the adhesive layer 36.

[0092] The cover body 38 can be formed, for example, from a glass body, a metal foil, or a sealed plastic film cover body. The cover body 38 can be arranged, for example, by means of a frit bond (glass frit bonding / glass soldering / seal glass bonding) using a conventional glass solder in the geometric edge regions of the organic light-emitting component 10 on the encapsulation layer 24 or the active region. The cover body 38 can, for example, have a refractive index (for example, at a wavelength of 633 nm) of, for example, 1.3 to 3, for example, 1.4 to 2, for example, 1.5 to 1.8.

[0093] The cover body 38 comprises, for example, glass and / or metal. For example, the cover body 38 can be formed essentially of glass and have a thin metal layer, for example a metal foil, and / or a graphite layer, for example a graphite laminate, on the glass body. The cover body 38 serves to protect the organic light-emitting component 10, for example from external mechanical forces. Furthermore, the cover body 38 can serve to distribute and / or dissipate heat generated in the organic light-emitting component 10. For example, the glass of the cover body 38 can serve as protection against external influences, and the metal layer of the cover body 38 can serve to distribute and / or dissipate the heat generated during operation of the organic light-emitting component 10.

[0094] Fig. 4 shows a comparative example of an organic light-emitting component 10, which may, for example, largely correspond to the preceding organic light-emitting component 10.

[0095] Alternatively or in addition to the nanoadditives in the electron-transport layer 44, the nanoadditives are arranged in the emitter layer 42. The material of the emitter layer 42 explained above serves as a carrier material for the nanoadditives. The nanoadditives can be formed according to an embodiment of the nanoadditives explained above. The nanoadditives and the carrier material of the emitter layer 42 can be formed above the hole-transport layer 40 in accordance with the nanoadditives and / or the carrier material of the electron-transport layer 44, for example in the form of a liquid solution.

[0096] If nano-additives are arranged in the electron transport layer 44 and in the emitter layer 42, the nano-additives in the electron transport layer 44 can be formed the same as or differently than the nano-additives in the emitter layer 42.

[0097] Fig. 5 shows a comparative example of an organic light-emitting component 10, which may, for example, largely correspond to the above organic light-emitting component 10.

[0098] Alternatively or in addition to the nanoadditives in the electron-transport layer 44 and / or the emitter layer 42, the nanoadditives are arranged in the hole-transport layer 40. The material of the hole-transport layer 40 explained above serves as a carrier material for the nanoadditives. The nanoadditives can be formed according to an embodiment of the nanoadditives explained above. The nanoadditives and the carrier material of the hole-transport layer 40 can be formed above the first electrode 20 in a manner corresponding to the nanoadditives and / or the carrier material of the electron-transport layer 44 and / or the emitter layer 42, for example in the form of a liquid solution.

[0099] If nano-additives are arranged in the electron transport layer 44 and in the hole transport layer 40 and / or in the emitter layer 42 and in the hole transport layer 40, the nano-additives in the hole transport layer 40 can be formed the same as or differently than the nano-additives in the emitter layer 42 and / or the electron transport layer 44.

[0100] Fig. 6 shows a flow diagram of an embodiment of a method for producing an organic light-emitting component, for example the light-emitting component 10 explained above.

[0101] In a step S2, a carrier is provided, for example the carrier 12 explained above. The carrier 12 can be formed, for example.

[0102] In a step S4, a first electrode is formed, for example, the first electrode 20 is formed over the carrier 12. The first electrode 20 can, for example, be deposited over the carrier 12 and, if appropriate, over the barrier layer on the carrier 12.

[0103] In a step S6, an organic functional layer structure is formed, for example, the organic functional layer structure 22 is formed over the first electrode 20.

[0104] In a step S8, a layer of the organic functional layer structure 22 in the form of the carrier material with the nanoadditives is formed. Step S8 is processed during the execution of step S6. In other words, step S8 is a substep of step S6. The layer with the nanoadditives can be the hole-transport layer 40, the hole-injection layer, the emitter layer 42, the electron-transport layer 44, and / or the electron-injection layer.

[0105] A concentration of the nanoadditives in the carrier material, a number of nanoadditives in the carrier material and / or the nanoadditives themselves, for example taking their refractive index into account, and / or a thickness of the corresponding layer are specified depending on the optical property to be specified, for example the optical path length from the emitter layer 42 to the first and / or second electrode 20, 23. In particular, with the aid of the nanoadditives, the refractive index of the carrier material is shifted towards an overall refractive index of the layer of carrier material and nanoadditives such that the corresponding layer contributes to the specified optical property being met. The optical path length between an emission zone and one of the electrodes 20, 23 can, for example, be approximately 80 nm to approximately 800 nm, for example approximately 200 nm to approximately 600 nm, for example approximately 400 nm.

[0106] The support material can be an organic semiconductor that can be processed in the form of a liquid solution, such as a polymer or soluble small molecules. In this case, the nanoadditives can be applied together with the organic material from solution. For improved processability, nanoadditives with appropriate surface functionalization can also be used, enabling their solubility in the selected solvent and / or support material.

[0107] In a step S10, a second electrode is formed. For example, the second electrode 23 is formed over the organic functional layer structure 22. For example, the second electrode 23 can be deposited over the organic functional layer structure 22.

[0108] Optionally, a cover can be formed in a step S12. For example, the cover can be formed over the second electrode 23. The cover can, for example, comprise the encapsulation layer 24, the adhesive layer 36, and / or the cover body 38.

[0109] For example, the nanoadditives can be arranged in any desired layer of the organic functional layer structure 22. Furthermore, the organic light-emitting component 10 can have additional layers, for example, coupling-out layers or light-shaping layers, which can be formed in corresponding further steps of the method explained above.

Claims

[1] Organic light-emitting component (10), comprising - a first electrode (20), - an organic functional layer structure (22) above the first electrode for generating light, - a second electrode (23) above the organic functional layer structure (22), wherein the organic functional layer structure (22) comprises at least one layer with an organic carrier material having a first refractive index and with nano-additives embedded in the carrier material and having a second refractive index that is greater than the first refractive index, and having at least one external dimension that is less than a quarter of a predetermined wavelength of the generated light, and wherein an electron injection layer of the organic functional layer structure (22) comprises the layer with the carrier material and the nano-additives or is formed therefrom. [2] Organic light-emitting device (10) according to claim 1, wherein the predetermined wavelength is a dominant wavelength of the generated light. [3] The organic light-emitting device (10) according to claim 2, wherein the predetermined wavelength is a shortest dominant wavelength or a longest dominant wavelength of the generated light. [4] Organic light-emitting component (10) according to one of the preceding claims, wherein the nanoadditives comprise nanoparticles, nanowires, nanodots and / or nanotubes. [5] Organic light-emitting component (10) according to one of the preceding claims, wherein the first refractive index lies in a range between 1.6 and 1.8 and / or wherein the second refractive index lies in a range between 2.1 and 2.

5. [6] Organic light-emitting component (10) according to one of the preceding claims, wherein the nano-additives comprise TrO2, HfO2, ZrO2, Nb2O5 and / or ZnS. [7] Organic light-emitting component (10) according to one of the preceding claims, wherein the carrier material comprises a solution-processed organic semiconductor material. [8] Organic light-emitting component (10) according to one of the preceding claims, wherein the carrier material comprises a polymer or soluble small molecules. [9] Organic light-emitting component (10) according to one of the preceding claims, in which a hole injection layer, a hole transport layer (40), an electron transport layer (44) and / or an emitter layer (42) of the organic functional layer structure (22) comprises the layer with the carrier material and the nano-additives or is formed therefrom. [10] Organic light-emitting component (10) according to one of the preceding claims, in which the nano-additives, the material of the nano-additives, an external dimension of the nano-additives, a ratio of the nano-additives to the carrier material in the layer and / or a proportion of the nano-additives relative to the carrier material of the layer are selected and / or predetermined depending on a predetermined optical property of the organic light-emitting component (10). [11] Method for producing an organic light-emitting component (10), in which - a first electrode (20) is formed, - an organic functional layer structure (22) is formed over the first electrode (10) for generating light, - a second electrode (23) is formed over the organic functional layer structure (22), wherein the organic functional layer structure (22) is formed such that it has at least one layer with an organic carrier material having a first refractive index and with nano-additives embedded in the carrier material and having a second refractive index that is greater than the first refractive index and having at least one external dimension that is less than a quarter of a predetermined wavelength of the generated light, and wherein an electron injection layer of the organic functional layer structure (22) has the layer with the carrier material and the nano-additives or is formed therefrom. [12] Method according to claim 11, wherein the carrier material is applied to the first electrode (20) in a liquid state, the nanoadditives being dissolved or dispersed in the liquid carrier material. [13] Method according to one of claims 11 or 12, in which the nano-additives, the material of the nano-additives, an external dimension of the nano-additives, a ratio of the nano-additives to the carrier material in the layer and / or a proportion of the nano-additives relative to the carrier material of the layer are selected and / or predetermined depending on a predetermined optical property of the organic light-emitting component (10). [14] Method according to claim 13, wherein the predetermined optical property is an optical path length in the organic light-emitting component (10). [15] Method according to claim 14, wherein the predetermined optical property is the optical path length from an emission zone of the organic functional layer structure (22) to one of the electrodes (20, 23). [16] The method of claim 13, wherein the optical property is a size of a microcavity of the organic light-emitting device (10).

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