Organic light-emitting component

Abstract

Featuring an organic light-emitting component: - an organic functional layer stack (10) with at least one charge carrier generating layer (11) and at least two organic light-emitting layers (4, 5), and - two electrodes (2,7), wherein - at least one of the at least two organic light-emitting layers (4, 5) is part of the at least one charge carrier generating layer (11), - the organic light-emitting layer (4, 5), which is part of the charge carrier generation layer (11), has a material that acts simultaneously as a dopant and as an emitter material, - the organic functional layer stack (10) is arranged between the two electrodes (2, 7), and - one of the two electrodes (2, 7) is non-transparent and reflective.

Description

[0001] An organic light-emitting component is specified.

[0002] The following publications describe organic light-emitting devices: EP 2 713 416 A1, DE 10 224 021 B4, WO 2011 / 097 259 A1.

[0003] An organic light-emitting diode (OLED) can convert charge carrier pairs, each consisting of an electron and a hole, injected into an organic emitter layer into photons. With an OLED containing only one emitter layer, a maximum of one photon can be generated per injected charge carrier pair. To achieve higher efficiency, it is known to stack multiple emitter layers on top of each other, with a charge generation layer (CGL) positioned between each adjacent emitter layer. This makes it possible to generate multiple photons per charge carrier pair injected into such a stack, as the charge generation layers act like internal anodes and cathodes.

[0004] A CGL typically has a p-doped region and an n-doped region connected by an intermediate layer. A disadvantage of this design, where the CGLs represent additional layers on top of those required for light emission, is that the CGL layers often absorb in the wavelength range where the OLED emits, thus reducing the OLED's efficiency. Furthermore, commonly available p- and n-dopers are often expensive compared to other OLED materials. Additionally, conductivity doping can generally cause a strong temperature dependence of the operating voltage, suggesting that this is one of the limiting factors for OLED stability at high temperatures.

[0005] At least one function of certain embodiments is to specify an organic light-emitting component with at least two organic light-emitting layers.

[0006] This problem is solved by an object according to the independent patent claim. Advantageous embodiments and further developments of the object are characterized in the dependent claims and are further described in the following description and drawings.

[0007] An organic light-emitting device has at least two electrodes between which an organic functional layer stack is arranged. The organic functional layer stack comprises the at least two organic light-emitting layers in the form of organic electroluminescent layers, which generate light through charge carrier recombination during operation of the organic light-emitting device. The organic light-emitting device can, in particular, be configured as an organic light-emitting diode (OLED) with at least two organic light-emitting layers.

[0008] The organic functional layer stack can comprise layers of organic polymers, organic oligomers, organic monomers, small organic non-polymeric molecules, or combinations thereof. In addition to the at least two organic light-emitting layers, the organic functional layer stack can include at least one functional layer configured as a hole transport layer to enable effective hole injection into at least one of the light-emitting layers. Suitable materials for a hole transport layer include, for example, tertiary amines, carbazole derivatives, camphorsulfonic acid-doped polyaniline, or polystyrenesulfonic acid-doped polyethylenedioxythiophene. The organic functional layer stack can further comprise at least one functional layer configured as an electron transport layer.In general, the organic functional layer stack can, in addition to the at least two organic light-emitting layers, comprise a plurality of organic functional layers selected from hole injection layers, hole transport layers, electron injection layers, electron transport layers, hole blocking layers, and electron blocking layers. In particular, the layers of the organic functional layer stack can be entirely or at least predominantly organic functional layers. Furthermore, it is also possible that individual layers of the organic functional layer stack may also contain or be composed of inorganic materials, such as an intermediate layer of a charge carrier generation layer, as described below.

[0009] With regard to the basic structure of an organic light-emitting device, in particular with regard to the structure, layer composition and materials of the organic functional layer stack, reference is made to publication WO 2010 / 066 245 A1.

[0010] According to another embodiment, the organic functional layer stack with the two electrodes is arranged on a substrate. The substrate can, for example, comprise one or more materials in the form of a layer, a plate, a film, or a laminate, selected from glass, quartz, plastic, metal, or silicon wafer. Particularly preferably, the substrate comprises or is made of glass, for example, in the form of a glass layer, glass film, or glass plate.

[0011] According to a further embodiment, at least one of the electrodes is transparent. Here and in the following, "transparent" refers to a layer that is permeable to visible light. The transparent layer can be clearly translucent or at least partially light-scattering and / or partially light-absorbing, so that the transparent layer can, for example, also be diffusely or milkily translucent. A layer referred to here as transparent is particularly preferably as light-transmitting as possible, so that, in particular, the absorption of light generated in the organic functional layer stack during operation of the device is as low as possible.

[0012] The two electrodes between which the organic functional layer stack is arranged can, for example, both be transparent, allowing the light generated in the at least two light-emitting layers between the two electrodes to be emitted in both directions, i.e., through both electrodes. If the organic light-emitting device has a substrate, this means that light can be emitted both through the substrate, which is then also transparent, and in the direction away from the substrate. Furthermore, in this case, all layers of the organic light-emitting device can be transparent, so that the organic light-emitting device forms a transparent OLED.One of the two electrodes, between which the stack of organic functional layers is arranged, is opaque and reflective, so that the light generated in the at least two light-emitting layers between the two electrodes can only be emitted in one direction through the transparent electrode. If the electrode located on the substrate is transparent and the substrate is also transparent, it is referred to as a "bottom emitter," while if the electrode facing away from the substrate is transparent, it is referred to as a "top emitter."

[0013] The organic functional layer stack of the organic light-emitting device described here further includes at least one charge carrier generation layer. A "charge carrier generation layer" is defined here and in the following as a sequence of layers that is generally formed by a pn junction. The charge carrier generation layer, which can also be referred to as a "charge generation layer" (CGL), is specifically configured as a tunneling pn junction that operates in reverse and can be used for effective charge separation and thus for the "generation" of charge carriers.

[0014] According to another embodiment, the charge carrier generating layer comprises a first organic layer doped with a first type of charge carrier. Furthermore, the charge carrier generating layer comprises a second organic layer doped with a second type of charge carrier that differs from the first type. In particular, the charge carrier generating layer comprises an electron-conducting layer and a hole-conducting layer. "Electron-conducting" and "hole-conducting" can also be referred to here and in the following as n-conducting and p-conducting, respectively. In other words, the charge carrier generating layer comprises at least two organic layers, one of which is p-doped and the other n-doped.

[0015] Furthermore, at least one of the at least two organic light-emitting layers is part of the charge carrier generation layer. In other words, at least one layer of the charge carrier generation layer simultaneously forms one of the at least two organic light-emitting layers and contains a material that emits light during operation of the organic light-emitting device. Specifically, at least the first or the second organic layer of the charge carrier generation layer can simultaneously be one of the at least two organic light-emitting layers. In other words, this also means that at least one of the two organic light-emitting layers of the organic functional layer stack exhibits the functionality of an organic layer of the charge carrier generation layer, i.e., it is p- or n-type and contributes to charge carrier generation in the charge carrier generation layer.At least part of the charge carrier generation layer thus forms a light-generating area, i.e., at least one of the organic light-emitting layers of the organic light-emitting component.

[0016] The organic light-emitting device described here is based primarily on the idea of ​​significantly simplifying the construction of a stacked OLED, i.e., an OLED with at least two organic light-emitting layers, by having at least one or both light-emitting layers perform the function of a p- and / or n-layer in a charge carrier generation layer. This can be achieved by using at least one light-emitting layer that also exhibits p- or n-conducting properties and, together with at least one other oppositely conducting layer, displays a CGL effect. The structure of the organic light-emitting device described here may eliminate the need for commercially available p- and n-doped matrix materials that conduct holes and electrons, thus enabling a simpler OLED structure.

[0017] According to a further embodiment, an emitter material is used in the organic light-emitting layer, which is formed as part of the charge carrier generation layer, and simultaneously serves as a p- or n-type dopant. At least one of the at least two organic light-emitting layers that is part of the charge carrier generation layer comprises a material that acts simultaneously as a dopant and as an emitter material. Alternatively, it is also possible for an organic light-emitting layer that is part of the charge carrier generation layer to comprise an emitter material and additionally a dopant.

[0018] For example, at least one of the at least two organic light-emitting layers that is part of the charge carrier generation layer can contain a p-doper that is also an emitter material. The p-doper that is also an emitter material can, for example, contain or be composed of Ir(ppy)3 (tris-(2-phenylpyridine)iridium(III)).

[0019] Furthermore, at least one of the at least two organic light-emitting layers, which is part of the charge carrier generation layer, can contain an n-doper that is also an emitter material.

[0020] According to a further embodiment, exactly one of the at least two organic light-emitting layers is part of the charge carrier generation layer. Furthermore, a charge carrier blocking layer can be arranged between the other of the at least two organic light-emitting layers, i.e., the organic light-emitting layer that is not part of the charge carrier generation layer, and the charge carrier generation layer.

[0021] According to another embodiment, the at least two organic light-emitting layers are both parts of the charge carrier generation layer. In this case, the at least two organic light-emitting layers form the first and second organic layers of the charge carrier generation layer and are doped with different charge carrier types.

[0022] A hole-conducting organic layer, particularly a hole-conducting layer of the charge carrier generation layer, which can be an organic light-emitting layer or a pure CGL layer without light emission, can be configured as a p-doped layer containing an inorganic or organic dopant in an organic hole-conducting matrix. Suitable inorganic dopants include transition metal oxides such as vanadium oxide, molybdenum oxide, or tungsten oxide. Suitable organic dopants include, for example, tetrafluorotetracyanoquinodimethane (F4-TCNQ) or copper pentafluorobenzoate (Cu(I)pFBz). Furthermore, suitable organic dopants include transition metal complexes. These may preferably contain a central atom, such as copper, with ligands, for example, acetylacetonate (acac).Other possibilities include copper complexes, such as copper carboxylates, or metal complexes with bismuth and / or chromium.

[0023] An electron-conducting organic layer, in particular an electron-conducting layer of the charge carrier generation layer, which may be an organic light-emitting layer or a pure CGL layer, may be formed as an n-doped layer which has an n-doper in an organic electron-conducting matrix, for example a metal with low work function such as Cs, Li, Ca, Na, Ba or Mg or compounds thereof, for example Cs2CO3 or Cs3PO4.

[0024] Suitable matrix materials for a hole-conducting layer include one or more materials selected from the group consisting of HAT-CN (hexaazatriphenylenehexacarbonitrile), F16CuPc (copper hexadecafluorophthalocyanine), α-NPD, 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-dimethyl-fluorene), DMFL-NPB (N,N'-Bis(naphthalen-1-yl)-N,N'-bis(phenyl)-9,9-dimethyl-fluorene), DPFL-TPD (N,N'-Bis(3-methylphenyl)-N,N'-bis(phenyl)-9,9-diphenyl-fluorene), DPFL-NPB (N,N'-Bis(naphthalen-1-yl)-N,N'-bis(phenyl)-9,9-diphenyl-fluorene), 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-fluorine, 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, N,N,N',N'-tetra-naphthalen-2-yl-benzidine, and mixtures of these compounds.

[0025] Suitable matrix materials for an electron-conducting layer include one or more materials selected from the group containing 2,2',2"-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H-benzimidazole), 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl, 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'-bipyridin-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'-bipyridin-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, phenyldipyrenylphosphine oxide, naphthalene tetracarboxylic dianhydride and its imides, perylene tetracarboxylic dianhydride and its imides, materials based on silols with a silacyclopentadiene unit, and mixtures of the aforementioned substances.

[0026] According to another embodiment, the first and second organic layers of the charge carrier generation layer, at least one of which is an organic light-emitting layer, are directly adjacent to each other. Alternatively, the charge carrier generation layer can have an undoped intermediate layer between the first and second organic layers, i.e., between the electron-conducting layer and the hole-conducting layer. This intermediate layer can, for example, consist of a metal oxide, such as VO₄. x, for example V2O5, MoO x , WHERE x, Al2O3, Indium tin oxide, SnO x and / or ZnO xThe intermediate layer can be a metal-organic compound such as a phthalocyanine, for example, copper phthalocyanine (CuPc), vanadyl phthalocyanine (VOPc), or titanyl phthalocyanine (TiOPc), and can have a thickness greater than or equal to 1 nm, or greater than or equal to 2 nm and less than or equal to 10 nm, or less than or equal to 5 nm. Furthermore, the intermediate layer can be a thin metal layer, for example, with a thickness greater than or equal to 0.1 nm and less than or equal to 5 nm, and composed of one or more metals selected from Al, Ag, Cu, Ca, and Au. The intermediate layer can also contain two or more of the aforementioned materials, for example, in the form of a mixed layer. The intermediate layer can, for example, suppress the reaction of the sometimes highly reactive layers and / or the diffusion of dopants between the layers of the charge carrier generation layer.

[0027] The organic light-emitting device described here offers the advantage of a simplified stack structure compared to conventional OLEDs with CGLs, since at least one organic light-emitting layer also performs the additional function of a CGL layer. This can lead to faster and simpler fabrication with shorter cycle times, which is particularly beneficial for inline manufacturing. Furthermore, the organic light-emitting device may offer greater stability due to a reduced number of loss channels, materials, and interfaces. In addition, higher efficiency in terms of light emission may be achieved by reducing the absorption loss of the emitted light in the doped layers, as well as by lowering the voltage drop due to the reduced number of layers.Lower costs can also result from at least partially avoiding the use of expensive commercial p- and n-doping materials.

[0028] Further advantages, advantageous embodiments and further developments will result from the exemplary embodiments described below in conjunction with the figures.

[0029] They show: Fig. 1 a schematic representation of an organic light-emitting component according to an exemplary embodiment, Fig. 2 a schematic representation of a section of an organic light-emitting component according to a further embodiment, Fig. 3 a schematic representation of a section of an organic light-emitting component according to a further embodiment, Fig. 4 a schematic representation of a section of an organic light-emitting component according to a further embodiment and Fig. 5 a schematic representation of a section of an organic light-emitting component according to a further embodiment.

[0030] In the exemplary embodiments and figures, identical, similar, or similarly functioning elements may be designated with the same reference numerals. The depicted elements and their relative sizes are not to be considered to scale; rather, individual elements, such as layers, components, building elements, and areas, may be exaggerated for clarity and / or better understanding.

[0031] In Fig. Figure 1 shows an embodiment of an organic light-emitting device 100, which has an organic functional layer stack 10 with at least two organic light-emitting layers 4, 5 between two electrodes 2, 7.

[0032] In the illustrated embodiment, the electrodes 2, 7 and the organic functional layer stack 10 are arranged on a substrate 1. The substrate 1 can serve as a support element for the layers applied to it and can, for example, comprise or be formed from glass, such as a glass film or glass plate, quartz, and / or a semiconductor material. Alternatively, the substrate 1 can also comprise or be formed from a plastic film or a laminate of several plastic films and / or glass films.

[0033] At least one of the two electrodes 2, 7 is transparent, and in the case of the organic light-emitting device 100 being configured as a bottom emitter, where the lower electrode 2 arranged between the substrate 1 and the organic functional layer stack 10 is transparent, the substrate 1 is also transparent. In the case of the organic light-emitting device 100 being configured as a top emitter, at least the upper electrode 7 is transparent. If the organic light-emitting device 100 is to emit light in only one direction, the electrode opposite the direction of emission, i.e., the upper electrode 7 in the case of a bottom emitter and the lower electrode 2 in the case of a top emitter, is preferably reflective.If both electrodes 2, 7 and the substrate 1 are transparent, the organic light-emitting component is preferably designed as a transparent OLED that can emit light from both sides during operation.

[0034] A transparent conductive oxide can be used as a material for a transparent electrode. Transparent conductive oxides (TCOs) are transparent, conductive materials, typically metal oxides such as zinc oxide, tin oxide, cadmium oxide, titanium oxide, indium oxide, indium tin oxide (ITO), or aluminum zinc oxide (AZO). In addition to binary metal-oxygen compounds such as ZnO, SnO₂, or In₂O₃, ternary metal-oxygen compounds such as Zn₂SnO₄, CdSnO₃, ZnSnO₃, MgIn₂O₄, GaInO₃, Zn₂In₂O₅, or In₄Sn₃O₄ also belong to this group. 12or mixtures of different transparent conductive oxides belong to the group of TCOs. Furthermore, TCOs do not necessarily have a stoichiometric composition and can also be p- or n-doped.

[0035] Furthermore, a transparent electrode can also have a metal layer made of a metal or alloy, for example, one or more of the following materials: Ag, Pt, Au, Mg, Ag:Mg. Other metals are also possible. The metal layer has such a small thickness that it is at least partially transparent to the light generated by the at least two organic light-emitting layers 4, 5 during operation of the organic light-emitting device 100, for example, a thickness of less than or equal to 50 nm.

[0036] A reflective electrode can be made from a metal such as aluminum, barium, indium, silver, gold, magnesium, calcium, or lithium, as well as compounds, combinations, and alloys thereof. In particular, a reflective electrode can contain Ag, Al, or alloys of these metals, for example, Ag:Mg, Ag:Ca, or Mg:Al.

[0037] The electrodes 2, 7 can also have combinations of at least one or more TCO layers and at least one or more metal layers.

[0038] The electrodes 2, 7 can each be designed to be large-area. This enables large-area emission of the light generated in the organic light-emitting layers. "Large-area" can mean that the organic light-emitting component 100 has an area greater than or equal to a few square millimeters, preferably greater than or equal to one square centimeter, and particularly preferably greater than or equal to one square decimeter.

[0039] The organic light-emitting device 100 is designed as a so-called stacked OLED, in which the at least two organic light-emitting layers 4, 5 are arranged one above the other within the organic functional layer stack 10 in the stacking direction. The organic functional layer stack 10 further comprises a charge carrier generation layer 11, wherein, in the illustrated embodiment, the organic light-emitting layer 4 is part of the charge carrier generation layer 11. In particular, in the illustrated embodiment, the charge carrier generation layer 11 comprises a first organic layer 12, which is doped with a first type of charge carrier, and a second organic layer 13, which is doped with a second type of charge carrier that is different from the first type of charge carrier.The first organic layer 12, which is also the organic light-emitting layer 4, and the second organic layer 13 are directly adjacent to each other in the illustrated embodiment and form a reverse-operated pn junction, which, during operation of the organic light-emitting device 100, leads to charge carrier separation and thus to a provision of charge carriers for the organic light-emitting layers 4 and 5.

[0040] For example, the lower electrode 2 can be configured as the anode and the upper electrode 7 as the cathode. In this case, the first organic layer 12, or the organic light-emitting layer 4, is electron-conducting, and the second organic layer 13 is hole-conducting. Accordingly, the first organic layer 12, or the organic light-emitting layer 4, is n-doped, and the second organic layer 13 is p-doped.

[0041] As an alternative to the described polarity of electrodes 2, 7 and the corresponding configuration of the layers of the organic functional layer stack 10, the polarity of the organic light-emitting device 100 can also be reversed, so that the lower electrode 2 can be configured as the cathode and the upper electrode 7 as the anode. In this case, the doping of the organic layers 12, 13 of the charge carrier generating layer 11 is also reversed. The first organic layer 12, or the organic light-emitting layer 4, is thus p-doped in this case, while the second organic layer 13 is n-doped.

[0042] The p- or n-type conducting properties of the organic light-emitting layer 4 can be achieved by using a matrix material containing an emitter material that simultaneously acts as a p- or n-type dopant. For example, if the organic light-emitting layer 4 also forms a p-doped first organic layer 12 of the charge carrier generation layer 11, Ir(ppy)3 can be used as a material that acts as both an emitter and a p-type dopant. Alternatively, a matrix material containing both a light-generating emitter material and a suitable dopant can be used.

[0043] As an alternative to the embodiment shown, it is also possible that, instead of the organic light-emitting layer 4, the organic light-emitting layer 5 is formed as part of the charge carrier generation layer 11. In this case, the organic light-emitting layer 5 forms, for example, the second organic layer 13 of the charge carrier generation layer 11, while the first organic layer 12 is arranged between the organic light-emitting layers 4 and 5. The features of the organic light-emitting layers 4 and 5 and the charge carrier generation layer 11 described above apply accordingly in this case.

[0044] Furthermore, it is also possible that the organic functional layer stack 10 has more than two organic light-emitting layers, in which case a charge carrier generating layer can be arranged between each pair of immediately adjacent organic light-emitting layers. At least one or each of the charge carrier generating layers can have at least one organic layer formed by one of the organic light-emitting layers.

[0045] The organic functional layer stack 10 can comprise further organic functional layers in addition to the organic functional layers 4, 5, 12, 13 described above. In the illustrated embodiment, charge carrier injection and transport layers 3, 6 are shown by way of example only; these layers are conductive depending on the polarity of the electrodes 2, 7, either for holes or electrons.

[0046] Furthermore, an encapsulation arrangement, preferably in the form of a thin-film encapsulation (not shown), can be applied over the electrodes 2, 7 and the organic functional layer stack 10 to protect the organic light-emitting device 100, and in particular the layers of the organic functional layer stack 10 and the electrodes 2, 7, from damaging materials in the environment, such as moisture and / or oxygen and / or other corrosive substances, such as hydrogen sulfide. For this purpose, the encapsulation arrangement can comprise one or more thin layers, which are applied, for example, by means of an atomic layer deposition process and which, for example, comprise one or more of the materials aluminum oxide, zinc oxide, zirconium oxide, titanium oxide, hafnium oxide, lanthanum oxide, and tantalum oxide.The encapsulation arrangement can, for example, incorporate mechanical protection on a thin-film encapsulation in the form of a plastic layer and / or a laminated glass layer, thereby providing scratch protection. Alternatively, other encapsulation arrangements are also possible, such as an adhered glass lid.

[0047] In connection with the Fig. 2, Fig. 3, Fig. 4 to Fig. Figure 5 shows further embodiments of an organic light-emitting component with regard to the formation of the organic light-emitting layers 4, 5 and the charge carrier generation layer 11, which are modifications of the embodiment of the Fig. 1. The following description therefore refers primarily to differences from the exemplary embodiment of the Fig. 1 or the previously described embodiments.

[0048] As in Fig. As shown in Figure 2, the charge carrier generation layer 11 between the first organic layer 12 and the second organic layer 13 can additionally comprise an intermediate layer 14 that separates the materials of the organic layers 12 and 13. This can be particularly advantageous if a reaction between the materials of layers 12 and 13 or diffusion, for example of dopants, between these layers is to be prevented. The intermediate layer 14 can comprise materials as described above in the general section.

[0049] In Fig. Figure 3 shows a further embodiment in which a charge carrier blocking layer 8 is additionally arranged between the charge carrier generation layer 11 and the organic light-emitting layer 5, which is not part of the charge carrier generation layer 11. If the second organic layer 13 is p-type, the charge carrier blocking layer 8 can be an electron blocking layer. If the second organic layer 13 is n-type, the charge carrier blocking layer 8 can be a hole blocking layer. Alternatively to the embodiment shown, the organic layers 12, 13 of the charge carrier generation layer 11 can also be directly adjacent to each other without an intermediate layer 14.

[0050] According to the description of the exemplary embodiment of the Fig. 1. The exemplary embodiments of the following also apply. Fig. 2 and Fig. 3 for both possible polarities of the organic light-emitting component 100. Furthermore, it is also possible that the organic light-emitting layer 5 is part of the charge carrier generation layer 11 instead of the organic light-emitting layer 4. The features described in connection with the intermediate layer 14 and the charge carrier blocking layer 8 apply accordingly in this case.

[0051] In Fig. Figure 4 shows a further embodiment in which both organic light-emitting layers 4 and 5 are configured as layers of the charge carrier generation layer 11, i.e., as the first organic layer 12 and the second organic layer 13, respectively, which are directly adjacent to each other without an intervening intermediate layer. The features previously described in connection with the organic light-emitting layer 4, which is simultaneously configured as the first organic layer 12 of the charge carrier generation layer 11, apply equally to the organic light-emitting layers 4 and 5, wherein, depending on the polarity of the organic light-emitting device, one of the organic light-emitting layers 4 and 5 is p-doped and the other is n-doped. As previously described, the dopant can simultaneously form the emitter material of the respective layer, or it can contain a suitable emitter material in addition to a dopant.

[0052] In Fig. 5 shows a further embodiment which, in comparison to the embodiment of the Fig. 4 additionally has an intermediate layer 14 between the organic light-emitting layers 4, 5 which are formed as parts of the charge carrier generation layer 11, as in connection with the embodiment of the Fig. 2 is described.

[0053] The embodiments and their features described in connection with the figures can also be combined with one another according to further embodiments, even if such combinations are not explicitly shown in the figures. Furthermore, the embodiments described in connection with the figures can have additional or alternative features as described in the general section.

Claims

[1] Including an organic light-emitting component: - an organic functional layer stack (10) with at least one charge carrier generating layer (11) and at least two organic light-emitting layers (4, 5), and - two electrodes (2,7), wherein - at least one of the at least two organic light-emitting layers (4, 5) is part of the at least one charge carrier generating layer (11), - the organic light-emitting layer (4, 5), which is part of the charge carrier generation layer (11), has a material that acts simultaneously as a dopant and as an emitter material, - the organic functional layer stack (10) is arranged between the two electrodes (2, 7), and - one of the two electrodes (2, 7) is non-transparent and reflective. [2] Component according to claim 1, wherein the charge carrier generating layer (11) comprises a first organic layer (12) doped with a first charge carrier type and a second organic layer (13) doped with a second charge carrier type, and at least one of the first and second organic layers (12, 13) is simultaneously one of the at least two organic light-emitting layers (4, 5). [3] Component according to claim 2, wherein the first and second organic layer (12, 13) are directly adjacent to each other. [4] Component according to claim 2 wherein an intermediate layer (14) is arranged between the first and second organic layer (12, 13). [5] Component according to one of the preceding claims, wherein at least one of the at least two organic light-emitting layers (4, 5) which is part of the charge carrier generation layer (11) comprises a p-doper which is simultaneously an emitter material. [6] Component according to claim 5, wherein the p-doping material, which is simultaneously an emitter material, comprises or is formed by Ir(ppy)3. [7] Component according to one of claims 1 to 4, wherein at least one of the at least two organic light-emitting layers (4, 5) which is part of the charge carrier generation layer (11) comprises an n-doping material which is simultaneously an emitter material. [8] Component according to one of the preceding claims, wherein exactly one of the at least two organic light-emitting layers (4, 5) is part of the charge carrier generating layer (11). [9] Component according to claim 8, wherein a charge carrier blocking layer (8) is arranged between the other of the at least two organic light-emitting layers (4, 5) and the charge carrier generating layer (11). [10] Component according to any one of claims 1 to 7, wherein the at least two organic light-emitting layers (4, 5) are both part of the charge carrier generation layer (11) and form a first and second organic layer (12, 13) of the charge carrier generation layer (11) which are doped with different charge carrier types. [11] Component according to one of the preceding claims, wherein the charge carrier generating layer (11) comprises an electron-conducting layer and a hole-conducting layer.

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