DE102008051132A1 - Organic electronic component e.g. organic light-emitting diode, organic photodetector and/or organic solar cell, comprises transparent electrodes, and organic layer sequence having charge carrier transport layers and active region - Google Patents

Abstract

The organic electronic component (100) comprises a transparent first electrode (1), an organic layer sequence (3) having first and second charge carrier transport layers and an active region, and a transparent second electrode (2). The first charge carrier transport layer is disposed between the active region and the first electrode, and the second charge carrier transport layer is disposed between the active region and the second electrode. The charge carrier transport layers comprise a matrix material with a dopant. The matrix material and the dopant form charge-transfer-complexes. The organic electronic component (100) comprises a transparent first electrode (1), an organic layer sequence (3) having first and second charge carrier transport layers and an active region, and a transparent second electrode (2). The first charge carrier transport layer is disposed between the active region and the first electrode, and the second charge carrier transport layer is disposed between the active region and the second electrode. The charge carrier transport layers comprise a matrix material with a dopant. The matrix material and the dopant form charge-transfer-complexes, which absorb a part of an electromagnetic radiation falling from outside on the organic radiation-emitting component with first and second absorption spectra. The first charge carrier transport layer causes a predetermined color impression of the component in a switched-in electronic operating condition and the second charge carrier transport layer causes a predetermined color impression of the component in a switched-off electronic operating condition, where the predetermined color impression is noticeable through the electrodes by the external observer. The first charge carrier transport layer comprises a first layer stack with first and second layers, which have the matrix material and the dopant and are differentiated from each other, and is a hole-transport layer and an electron-transport layer. The dopant comprises metal oxide with group of metals, metal organic compound and/or organic material, aromatic organic material having substituents, and alkali metal salt, earth alkali metal salt and/or metal organic compounds. The metal organic compound comprises a metal complex with hydropyrimidopyrimidine, and group of metals. The dopant has a concentration of 5% in the matrix material. The active region is suited to radiate the electromagnetic radiation with an emission spectrum in the switched-in operating condition. The emission spectrum and the first absorption spectrum are partially same. The first charge carrier transport layer has a saturable absorption coefficient. The color impression noticeable in the switched-off operating condition is not noticeable in the switched-in operating condition by the first charge carrier transport layer.

Description

It becomes an organic electronic device with an organic Layer sequence specified.

In the production of organic light-emitting diodes, the parameters luminescence (measurable in [cd / m ² ]), efficiency (measurable in [cd / A]) and lifetime (measurable in [h]) are optimized with respect to the entire structure. Particularly in the case of white-emitting organic light-emitting diodes which have a layer stack with at least two or even three emitter layers, the optimization of the exciton density in the emitter layers is particularly complicated. If the external appearance of the organic light-emitting diode, which is caused by the stack of layers in the switched-off state, is adjusted, this is hardly possible with known organic light-emitting diodes since the emitter layers are no longer to be changed with respect to their electronic properties.

A Task of at least one embodiment is it an organic electronic device with an organic Layer sequence with a first charge carrier transport layer indicate.

These The object is achieved by an article having the features of the independent patent claim 1 solved. Advantageous embodiments and Further developments of the subject matter are characterized in the dependent claims and continue to follow from the description below and the drawings out.

• – eine transparente erste Elektrode,
• – eine organische Schichtenfolge mit einer Ladungsträgertransportschicht und einem aktiven Bereich und
• – eine zweite Elektrode, wobei
• – die erste Ladungsträgertransportschicht zwischen dem aktiven Bereich und der ersten Elektrode angeordnet ist,
• – die erste Ladungsträgertransportschicht ein Matrixmaterial mit einem Dotierstoff umfasst und
• – das Matrixmaterial und der Dotierstoff Charge-Transfer-Komplexe bilden, die einen Teil einer von außen auf das organische strahlungsemittierende Bauelement fallenden elektromagnetischen Strahlung mit einem ersten Absorptionsspektrum absorbieren und in einem ausgeschalteten elektronischen Betriebszustand einen vorbestimmten Farbeindruck des Bauelements hervorrufen, der durch die erste Elektrode von einem externen Beobachter wahrnehmbar ist.

In accordance with at least one embodiment, an organic electronic component comprises in particular

• A transparent first electrode,
• An organic layer sequence with a charge carrier transport layer and an active region and
• - a second electrode, wherein
• The first charge carrier transport layer is arranged between the active region and the first electrode,
• - The first charge carrier transport layer comprises a matrix material with a dopant and
• The matrix material and the dopant form charge transfer complexes which absorb part of an electromagnetic radiation having a first absorption spectrum from the outside onto the organic radiation-emitting component and in a switched-off electronic operating condition produce a predetermined color impression of the component passing through the first electrode is perceptible by an external observer.

That a layer or element "on" or "over" one another layer or another element or "between" two other layers or elements arranged or applied, can here and hereinafter mean that the one layer or the one element directly in direct mechanical and / or electrical contact is arranged on the other layer or the other element. Furthermore, it may also mean that the one layer or the one element indirectly on top of or above the other layer or the other element is arranged. In this case, then more layers and / or Elements can be arranged between the one and the other layer.

As "external Observer "will here and in the following a man with average eyesight and an average visual apparatus. "Perceptible" is in this context for an external observer therefore an electromagnetic radiation, the one wavelength and an intensity which is suitable, a visual stimulus in the visual system of the external observer. A first electromagnetic radiation can from the external observer but for example at the same time Perception of a second electromagnetic radiation imperceptible be within the meaning of the description below, when the first electromagnetic Radiation compared to the second electromagnetic radiation such a low intensity that has a sensory perception of the first electromagnetic Radiation due to physico-chemical and / or neurological operations caused by the second electromagnetic radiation in the visual system of the external observer, is not possible. That can be here and hereinafter referred to as "outshining" the first electromagnetic radiation through the second electromagnetic Radiation can be called. Furthermore, a first electromagnetic Radiation from an external observer not perceptible in the sense be the description below, when the first electromagnetic Radiation such a small intensity difference and / or wavelength difference and / or spatial Has a difference to a second electromagnetic radiation, so that the first and second electromagnetic radiation is not separated from the average human visual system dissolvable are. This can be referred to here and below as "too low a contrast" become. The "external observer" as well serve the feature "perceptible" therefore on the one hand a quantitative characterization of a wavelength range and a minimum intensity electromagnetic radiation, such characterization but on the other hand in the light of the physiological and neuronal peculiarities of the human visual system.

When a "from Outside on the organic electronic component incident electromagnetic Radiation "will here and below denotes an electromagnetic radiation, not from the organic electronic component itself, so for example, from the active region of the organic layer sequence, is emitted. That may mean that from the outside the component incident electromagnetic radiation ambient radiation may be, in particular ambient light, for example. Such ambient radiation For example, solar radiation, especially sunlight, or also be electromagnetic radiation, that of artificial Light sources, such as lighting equipment is emitted. Of the predetermined color impression of the device passing through the first electrode is observable by the external observer, depends on the spectrum of from the outside on the device from incident electromagnetic radiation. In this respect, the predetermined color impression in the above sense as a color impression to understand that in a sunlight or at least similar from the outside on the component incident electromagnetic radiation perceptible in a continuous spectrum in the visible range is. In other words, becomes the definition of the predetermined color impression one from the outside on the organic electronic component incident electromagnetic Radiation with a color rendering index (CRI) of 100 accepted. The concept of the CRI is known to those skilled in the art and will not continue here.

Of the predetermined color impression perceivable by an external observer is able to do so straight from the part of the spectrum of the outside caused the component falling electromagnetic radiation which does not absorb from the charge carrier transport layer can be and reflects back towards the external observer becomes.

Here and hereinafter "spectrum" or "sub-spectrum" means a spectral one Distribution of electromagnetic radiation with at least one spectral component having a wavelength or a plurality of Spectral components with multiple wavelengths and / or ranges of wavelengths. One first spectrum and a second spectrum are the same below, when the spectral components and their relative intensities are the same in the case of the first and the second spectrum, where the absolute intensity of the first spectrum deviate from the absolute intensity of the second spectrum can.

As "charge carrier transport layer" is here and hereinafter a functional organic layer of organic Layer sequence designated for at least one type of charge carrier, so electrons and / or holes, is electrically conductive or semiconducting. It can be a Carrier transport layer also features of a charge carrier injection layer and be capable of carrying charge carriers from an electrode efficiently into the organic layer sequence to inject and conduct.

Just a charge carrier transport layer characterizes the external appearance and therefore the perceptible color impression of an organic electronic Device when the charge carrier transport layer between a transparent electrode and further layers of the organic layer sequence is arranged. In a built-in or assembled state of the organic electronic component can the first charge carrier transport layer from all layers of the organic layer sequence to an external one Observer closest lie so that in terms of organic layer sequence before all or even the first charge carrier transport layer perceptible is. In known organic devices are charge carrier transport layers mainly or even exclusively in terms of their electronic properties such as the electrical Conductivity and the charge carrier injection optimized. In a charge carrier transport layer designed as a hole transport layer plays to the hole line the energetic position of the highest occupy Molecular orbitals ("highest occupied molecular orbital "," HOMO ") in comparison to corresponding energetic states of adjacent layers the organic electronic component a role. In a formed as an electron transport layer charge carrier transport layer plays accordingly to the electron conduction the energetic situation the lowest unoccupied molecular orbitals ("lowest unoccupied molecular orbital "," LUMO ") in comparison to corresponding energetic states of adjacent layers the organic electronic component a role. By doping becomes in known organic components depending on the model in the first approximation the number of charge carriers increases, for example in the case of the hole line through the doping and thus by charge transfer more holes be generated in the matrix material. Here, HOMO and LUMO in the first Approximation to be unchanged. Once an interaction takes place, it may be possible that these, if, for example, slightly changed. Through the doping It may be possible be, the electrical conductivity to increase and thus the electrical resistance of the organic electronic component to reduce.

Due to the fact that possible materials and doping technologies are very limited and only in terms of electronic properties Shafts of an organic component are specifically adapted, is fixed in known organic components of the external appearance and thus the perceptible color impression by the related technology itself and can be modified only insufficiently for design purposes. For example, known organic components often have a reddish or yellowish color impression, which may be undesirable for technical, aesthetic and / or market economic reasons compared to blue or gray color impressions.

at The organic electronic component described here can For example, for reasons of design, the external appearance in the off be adjustable electronic operating state without further adapted functional layers of the organic layer sequence or changed Need to become. Continue to have no further functional elements such as additional Filter layers are added to the device to the desired To achieve color impression. In this case, the predetermined color impression depending on the version the organic electronic device in a switched on be perceivable electronic operating state. It can the first charge carrier transport layer also act as a filter. It is preferred by such a charge carrier transport layer a small percentage, ie less than 10%, of the emitted filtered electromagnetic radiation. Alternatively and preferred can in the switched-on operating state, the emission color of the device dominate such that the appearance of the charge carrier transport layer is not noticeable when switched on.

By a suitable choice of the matrix material and the dopant of first charge carrier transport layer can electronic properties with regard to the electronic functioning of the organic electronic device, such as electrical conductivity and / or the charge carrier injection, and at the same time the predetermined color impression for the desired appearance in the off be ensured electronic operating state. This can by forming the charge-transfer complexes in the matrix material with the dopant possible be. The matrix material and the dopant form electron-donor-acceptor complexes, their absorption band preferably in the visible wavelength range lie. The absorption band of the charge transfer complexes depends on this from the respective energetic position of their HOMOs and LUMOs relative to each other. The charge-transfer complexes can thus be used in addition to the charge carrier conductivity for holes and / or for electrons, have the first absorption spectrum that the predetermined color impression enable can.

in the Contrary to known organic devices, in which in charge carrier transport layers by doping only the energetic position of the HOMOs or only the LUMOs will be adapted to the one described here organic electronic device in the first charge carrier transport layer by suitable choice of the matrix material and the dopant the energetic position of the HOMOs or the LUMOs as required conductivity and at the same time the relative energetic position of the HOMOs and LUMOs adjusted to each other.

Farther may be the first charge carrier transport layer directly and immediately adjacent to the first electrode. Thereby It may be possible be that the predetermined color impression of the first charge carrier transport layer not by more between the first electrode and the first one Carrier transport layer arranged layers changed and / or falsified becomes. About that In addition, the first charge carrier transport layer as a colored, non-transparent Cover for serve further layers of the organic layer sequence.

Farther The thickness of the first charge carrier transport layer can also be predetermined Affect color impression. The bigger the Thickness of the charge carrier transport layer is, the higher is about the achievable color saturation the predetermined color impression. But it is advantageous if the absorption for the emitted light as possible is low An organic electronic device can typically have a thickness of a few 100 nanometers and form a microcavity, d. H. The color spectrum of the device also depends on which wavelengths are destructive or constructive interference. The thickness of the charge transport can between 1 nanometer and 2 microns, preferably between 10 nanometers and 500 nanometers, more preferably between 20 nanometers and 300 nanometers selected with the boundaries included.

For example, the organic electronic component can be embodied as an organic light-emitting diode in which electromagnetic radiation can be generated in the active region of the organic layer sequence in an activated electronic operating state. The first electrode and / or the second electrode, together with the organic layer sequence for the electromagnetic radiation generated in the active region, form an at least half-sided cavity, which can be set across the thickness of the charge carrier transport layer. Furthermore, regardless of the operation of the organic electro When the electronic component is switched on, unevenness and / or inhomogeneities of layers lying beneath the first charge carrier transport layer are compensated and / or covered.

Farther For example, the concentration of the dopant in the matrix material may be predetermined Affect color impression, with the achievable color saturation the higher the color of the predetermined color impression can be Concentration is. As concentration is here and below the molar concentration of the dopant in relation to Called matrix material. The concentration of the dopant in the Matrix material can be homogeneous. That may mean that the dopant uniformly and homogeneously over the first charge carrier transport layer is distributed. The concentration can be greater than or equal to 1%, thus a noticeable color impression can be produced. Furthermore, the Concentration bigger or equal to 5%, and especially greater than or equal to 10%, preferably bigger or equal to 20%, and more preferably greater than or equal to 50% a density of charge-transfer complexes in the first charge carrier transport layer to produce a high color saturation allow the predetermined color impression. It can be a percentage in particular also indicate a layer thickness-to-volume ratio, because the deposition rates can be measured. This leads in the Practice typically for using rate ratios.

Farther For example, the concentration of dopant in the matrix material may be a Have gradients and depending of at least one extension direction of the charge carrier transport layer increase or decrease. The concentration can be a surface gradient have, so that the concentration in at least one direction along change the main infection level can. Thereby can at least in the off electronic mode, for example Gradient pattern and / or color gradients are perceptible. Farther For example, the concentration may have a thickness gradient. That means, that the concentration of the dopant depending on from the depth in the charge transport layer along the thickness expansion and perpendicular to the main plane of penetration the charge carrier transport layer can change. In particular, the concentration within the first charge carrier transport layer decrease approximately in the direction of the active region, so that the first charge carrier transport layer a higher one near the first electrode Concentration of the dopant than in one of the first Electrode seen from greater depth of the Charge carrier transport layer. By such a thickness gradient of the concentration, for example a high color saturation the predetermined color impression can be achieved while the Concentration of the dopant near an adjacent layer of the organic layer sequence to the electronic properties of is adapted to adjacent layer. Alternatively or additionally It may also be advantageous if the concentration of the dopant increases in the direction of the active region within the first charge carrier transport layer. For example, you can through a thickness gradient of the concentration a continuous or Gradual shift of HOMOs and / or LUMOs and thus one Improvement of the charge carrier injection properties and charge carrier transport properties be achieved.

Of the Gradient of concentration may be, for example, a linear, quadratic, cubic or exponential course or a mixture thereof exhibit. Furthermore, the gradient may also be a non-steady Have gradient, so that the concentration of the dopant change abruptly can.

The first charge carrier transport layer can at a concentration gradient, a mean concentration of the Dopant, the values as above in connection with a can assume homogeneous concentration called. This can be the Concentration along the gradient, for example, of one value greater or equal 10%, preferably larger or equal to 20%, and more preferably greater than or equal to 50% to one Value less than or equal to 10% and preferably less than or equal to 5% decrease or increase conversely.

Farther may be the first charge carrier transport layer have a plurality of dopants in the matrix material, all the same concentration or the same concentration gradient can have. Alternatively, the first charge carrier transport layer at least have two dopants, the different concentrations and / or have different concentration gradients.

alternative can do this the above conditions from matrix materials to dopants also be reversed, which then also the energetic conditions in the component "turn around" can. Furthermore, only one dopant can be applied. This may be possible in particular in the case of the below-mentioned metal oxides.

Furthermore, the first charge carrier transport layer may have a layer stack with at least two layers which are different from one another. This can mean that the first charge carrier transport layer has at least one first layer and at least one second layer who are different from each other. The first layer and the second layer are to be considered here and below as different if the first and second layer have different matrix materials and / or different dopants.

The For example, at least two layers of the first charge carrier transport layer may be absorption spectra that are different from each other. By such Execution of the first charge carrier transport layer As a stack of layers with at least two layers, a predetermined Color impression be perceived, which is a superposition of the individual color impressions of at least two layers of the first charge carrier transport layer. Farther This can also be an angle-dependent Color impression be achievable. It may also be possible that an undesirable angle-dependent Color impression of the further layers of the organic layer sequence can be compensated.

By the embodiment of the first charge carrier transport layer described here the remaining organic layer sequence remains preferably in theirs Design unaffected. This may mean that the first charge carrier transport layer is such accomplished is that the electronic properties of the organic layer sequence by the embodiment of the first charge carrier transport layer described here compared to conventional organic components are not affected. It can be advantageous, the thickness and concentration of the first charge carrier transport layer in the manner described above.

Farther can the organic layer sequence between the active area and the second electrode have a second charge carrier transport layer, comprising a matrix material and a dopant. The matrix material and the dopant of the second charge carrier transport layer may be charge transfer complexes form a part of the outside on the organic electronic Component falling electromagnetic radiation with a second Absorb absorption spectrum.

The second absorption spectrum of the second charge carrier transport layer can thereby same or different to the first absorption spectrum of the first Carrier transport layer be.

Farther For example, the second electrode may be transparent and the second charge carrier transport layer can in the switched off electronic operating state of the organic electronic component a predetermined color impression of the Device caused by the second electrode of a external observer is perceptible.

Especially can the first and second electrodes are transparent. This can For example, a semi-transparent mirror effect reachable be. Furthermore you can different color impressions be perceivable from different sides of the device.

The first and second charge carrier transport layer can preferably charge carrier transport layers for each other different types of charge carriers be. For example, the first charge carrier transport layer a hole transport layer and the second charge carrier transport layer be an electron transport layer. Alternatively, the first Carrier transport layer also an electron transport layer and the second charge carrier transport layer be a hole transport layer. Accordingly, the first and second electrode as anode and cathode, or conversely as cathode and anode be formed.

Characteristics, the above and below in connection with the first Carrier transport layer can be described also for the second charge carrier transport layer apply unless otherwise expressly stated.

The Matrix material may vary depending on the design of the first charge carrier transport layer as a hole transport layer or as an electron transport layer selected from a group phenanthroline derivatives, imidazole derivatives, triazole derivatives, Oxadiazole derivatives, phenyl-containing compounds, compounds with condensed aromatics, carbazole-containing compounds, fluorene derivatives, Spirofluorene derivatives and pyridine-containing compounds and combinations comprising at least two or more of said materials.

For a charge carrier transport layer designed as a hole transport layer, the following matrix materials are particularly suitable:
N, N'-bis (naphthalen-1-yl) -N, N'-bis (phenyl) -benzidine (NPB),
N, N'-bis (naphthalen-2-yl) -N, N'-bis (phenyl) -benzidine (β-NPB),
N, N'-bis (3-methylphenyl) -N, N'-bis (phenyl) benzidine (TPD),
N, N'-bis (3-methylphenyl) -N, N'-bis (phenyl) -9,9-spirobifluorene (spiro-TPD),
N, N'-bis (naphthalen-1-yl) -N, N'-bis (phenyl) -9,9-spirobifluorene (spiro-NPB),
N, N'-bis (3-methylphenyl) -N, N'-bis (phenyl) -9,9-dimethylfluorene (DMFL-TPD),
N, N'-bis (naphthalen-1-yl) -N, N'-bis (phenyl) -9,9-dimethylfluorene (DMFL-NPB),
N, N'-bis (3-methylphenyl) -N, N'-bis (phenyl) -9,9-diphenylfluorene (DPFL-TPD),
N, N'-bis (naphthalen-1-yl) -N, N'-bis (phenyl) -9,9-di phenylfluorene (DPFL-NPB),
2,2 ', 7,7'-tetrakis (N, N-diphenylamino) -9,9'-spirobifluorene (spiro-TAD),
9,9-bis [4- (N, N-bis-biphenyl-4-yl-amino) -phenyl] -9H-fluorene (BPAPF),
9,9-bis [4- (N, N-bis-naphthalen-2-yl-amino) -phenyl] -9H-fluorene (NPAPF),
9,9-bis [4- (N, N'-bis-naphthalen-2-yl-N, N'-bisphenyl-amino) -phenyl] -9H-fluorene (NPBAPF),
2,2 ', 7,7'-tetrakis [N-naphthalenyl (phenyl) -amino] -9,9-spirobifluorene (spiro-2NPB),
N, N'-bis (phenanthren-9-yl) -N, N'-bis (phenyl) benzidine (PAPS),
2,7-bis [N, N-bis (9,9-spiro-bifluoren-2-yl) -amino] -9,9-spirobifluorene (spiro-5),
2,2'-bis [N, N-bis (biphenyl-4-yl) amino] -9,9-spirobifluorene (2,2'-spiro-DBP),
2,2'-bis (N, N-di-phenylamino) -9,9-spirobifluorene (spiro-BPA),
Di- [4- (N, N-ditolylamino) -phenyl] cyclohexane (TAPC),
2,2 ', 7,7'-tetra (N, N-di-tolyl) amino-spiro-bifluorene (spiro-TTB),
N, N, N ', N'-tetra-naphthalen-2-yl-benzidine (TNB),
4,4 ', 4 "-tris (N, N-diphenylamino) triphenylamine (NATA),
4,4 ', 4 "-tris (N- (1-naphthyl) -N-phenyl-amino) triphenylamine (1T-NATA),
4,4 ', 4 "-tris (N- (2-naphthyl) -N-phenyl-amino) triphenylamine (2T-NATA),
4,4'-di (N-carbazolyl) diphenyl (CBP),
Di-phenyl benzymidazole carbene (DPBIC).

For a charge carrier transport layer designed as an electron transport layer, the following matrix materials are also particularly suitable:
8-hydroxyquinolinolato-lithium (Liq),
2,2 ', 2''- (1,3,5-benzene triyl) tris (1-phenyl-1-H-benzimidazole) (TPBi),
2- (4-biphenylyl) -5- (4-tert-butylphenyl) -1,3,4-oxadiazole (PBD),
2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP),
4,7-diphenyl-1,10-phenanthroline (BPhen),
Bis- (2-methyl-8-quinolinolato) -4- (phenylphenolato) aluminum (BAlq),
1,3-bis [2- (2,2'-bipyridin-6-yl) -1,3,4-oxadiazo-5-yl] benzene (Bpy-OXD),
6,6'-bis [5- (biphenyl-4-yl) -1,3,4-oxadiazol-2-yl] -2,2'-bipyridyl (BP-OXD-Bpy),
3- (4-biphenylyl) -4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ),
4- (naphthalen-1-yl) -3,5-diphenyl-4H-1,2,4-triazole (NTAZ),
2,9-bis (naphthalen-2-yl) -4,7-diphenyl-1,10-phenanthroline (NBphen),
2,7-bis [2- (2,2'-bipyridin-6-yl) -1,3,4-oxadiazo-5-yl] -9,9-dimethylfluorene (Bby-FOXD),
1,3-bis [2- (4-tert-butylphenyl) -1,3,4-oxadiazol-5-yl] benzene (OXD-7),
Tris (2,4,6-trimethyl-3- (pyridin-3-yl) phenyl) borane (3TPYMB),
1-methyl-2- (4- (naphthalen-2-yl) phenyl) -1H-imidazo [4,5-f] [1,10] phenanthroline (2-NPIP),
2-phenyl-9,10, -di (naphthalen-2-yl) -anthracene (PADN),
2- (naphthalen-2-yl) -4,7-diphenyl-1,10, phenanthroline (HNBphen).

Moreover, because of their ability to coordinate to the dopants, oligo-pyridyl and / or pyrimidyl-arenes having the following structural formula may be particularly well suited for adjusting the color impression as matrix materials for an electron transport layer:

The Ring members A-F can independently of each other Carbon and / or one to two nitrogen atoms, n is in particular 2 to 8, wherein the free valences of the ends by hydrogen, methyl, Phenyl, 2-pyridyl, 3-pyridyl or 4-pyridyl saturated could be, R1 to R4 can be hydrogen, Methyl, phenyl, 2-pyridyl, 3-pyridyl or 4-pyridyl, above can out R1 and R2 or R3 and R4 with each other by butadiene or Azabutadieneinheiten be connected and between the nth and (n + 1) th ring by ethylene respectively Azomethineinheiten be connected with Phenanthren- or Azaphenanthreneinheiten be formed. The transport properties can be over the Control the number of nitrogen atoms in the ring system. The absorption band the complex formed by cocondensation then influences targeted the resulting color impression of the device in the off Status.

The Oligo-pyridyl and / or -pyrimidyl-arenes are in their arrangement freely permutatable and can be used in their periphery in turn phenyl, pyridyl and pyrimidyl and hydrogen and methyl as substituents. Under "Oligo" can here and below in particular a range of values for n of greater than or equal to 2 and less than or equal to 8 are understood.

For example, a first charge carrier transport layer designed as an electron transport layer may also comprise one or more of the following materials as matrix material:
1,4-bis (2-phenylpyrimidin-5-yl) benzene (BPPyP),
1,4-bis (2-methylpyrimidin-5-yl) benzene (BMPyP),
1,4-di (1,10-phenanthrolin-3-yl) benzene (BBCP),
2,5-di (pyridin-4-yl) pyrimidine (DPyPy),
1,4-bis (2- (pyridin-4-yl) pyrimidin-5-yl) benzene (BPyPyP),
2,2 ', 6,6'-tetraphenyl-4,4'-bipyridine (GBPy),
1,4-di (benzo [h] quinolin-3-yl) benzene (PBAPA),
2,3,4,5,6-pentaphenylpyridine (PPPy),
2,3,5,6-tetraphenyl-4,4'-bipyridine (TPPyPy),
1,4-bis (2,3,5,6-tetraphenylpyridin-4-yl) benzene (BTPPyP),
2,4,6-tri (pyridin-4-yl) pyrimidine (TPyPm),
1,4-bis (2,6-tetrapyridinylpyridin-4-yl) benzene (BDPyPyP).

The The pyridine and pyrimidine derivatives mentioned may be suitable for charge transfer bands with the below-mentioned dopants to form the color impression of the organic electronic device in the off state can influence.

Farther may be the first charge carrier transport layer also have one or more polymer materials. such Materials can For example, a kostengünsitge To enable production of the organic electronic component. It may be particularly advantageous, if so, the first charge carrier transport layer is applied to the first electrode. The application can by Printing, spraying, Doctoring or something similar Application method carried out. In this case, the first charge carrier transport layer for example PEDOT: PSS (polystyrenesulfonic acid-doped polydiethoxythiophene) and / or PANI (champhersulfonic acid doped Polyaniline) and / or differently doped polyarylamines.

For example may be the first charge carrier transport layer designed as a hole transport layer be. This may mean that the dopant has a p-doping of the Matrix material of the first charge carrier transport layer allows.

Of the Dopant can be a metal oxide, an organometallic compound, an organic material or a mixture thereof or be The dopant may additionally or alternatively a plurality of different metal oxides and / or a A plurality of different organometallic compounds and / or a Have a plurality of different organic compounds. In particular, can the dopant Lewis acid character have or a Lewis acid be. Lewis acids, that is electron pair acceptors, can be particularly suitable for the formation of charge-transfer complexes. In the case of polymers, the abovementioned sulfonic acids are even Proton acids.

The dopant may comprise one or more metal oxides with one or more metals, the metals being selected from tungsten, molybdenum, vanadium and rhenium. The dopant may particularly preferably comprise one or more of the metal oxides WO ₃ , MoO ₃ , V ₂ O ₅ , Re ₂ O ₇ and Re ₂ O ₅ . While rhenium pentoxide is suitable as dopant to allow a first charge carrier transport layer with a blue color impression, the other metal oxides mentioned are suitable to allow a yellow to orange color impression. In particular, oxides of rhenium are Lewis acids which are readily vaporizable at a temperature of less than 250 ° C and at a pressure of 10 ^-6 mbar and are therefore well suited for p-type doping. It has been shown experimentally that the doping properties with respect to the electronic properties of the first charge carrier transport layer of rhenium pentoxide and rhenium heptoxide differ only slightly, so that such metal oxides can be selected depending on the predetermined color impression. The other metal oxides mentioned exhibit similar processing properties for p-doping. Furthermore, osmium tetroxide is possible, which is gaseous and strongly oxidizing.

Farther For example, the dopant may be used for p-doping the first charge carrier transport layer also have organometallic compounds with Lewis acid character. Especially in organometallic compounds or complexes with Paddle wheel structure is the Lewis acid character of the axial position particularly pronounced.

Furthermore, the organometallic compounds may comprise ruthenium and / or rhodium. For example, the dopant may contain as organometallic compound a trifluoroacetate (TFA), for example di-rhodium-tetra-trifluoroacetate (Rh ₂ (TFA) ₄ ), which may give a (bluish) color impression with (NPB), or the isoelectronic ruthenium compound Ru ₂ (TFA ) ₂ (CO) ₂ , which allows an orange color impression.

Farther For example, the dopant for p-type doping may comprise organic materials. having aromatic functional groups or aromatic organic materials are. In particular, the dopant may be aromatic Materials with a pronounced Number of fluorine and / or cyanide (CN) substituents. For example, can the dopant 2,3,5,6-tetrafluoro-7,7,8,8-tetracyano-quinodimethane (F4-TCNQ) and / or Pyrazino [2,3-f] [1,10] phenanthroline-2,3-dicarbonitride (PPDN).

Furthermore, the first charge carrier transport layer can be designed as an electron transport layer. This may mean that the dopant has an n-type doping of the matrix material of the first La Manifold transport layer allows. In particular, the dopant may be formed as an electron donor having a low ionization potential, that is, a high HOMO.

The dopant may comprise or be an alkali metal salt, an alkaline earth metal salt, an organometallic compound or a mixture thereof. The dopant may additionally or alternatively comprise a plurality of different alkali metal salts and / or a plurality of different alkaline earth metal salts and / or a plurality of different organometallic compounds. In particular, the dopant may have a carbonate. Furthermore, the dopant may particularly preferably comprise cesium. For example, Cs ₂ CO ₃ can give a bluish color impression in BCP or in BPhen as matrix material. Furthermore, the dopant may also comprise ruthenium carbonate.

Furthermore, the dopant for n-type doping may comprise a metallocene, ie an organometallic compound having a metal M and two cyclopentadienyl radicals (Cp) in the form M (Cp) ₂ . Alternatively or additionally, the dopant may also comprise a metal hydropyrimidopyrimidine complex. The metal may for example comprise or be tungsten, molybdenum and / or chromium.

For example, chromocene or decamethylchromocene can provide gray-colored color impressions for an n-doped first charge carrier transport layer, while organometallic compounds with 1,2,4,6,7,8-hexahydro-2H-pyrimido [1,2-a] pyrimidine (hpp) such as W ₂ (hpp) ₄ , Mo ₂ (hpp) ₄ and Cr ₂ (hpp) allow ₄ red to orange color impressions. Furthermore, organometallic compounds with tungsten, molybdenum and / or chromium in combination with 1,4,6-triazabicyclo (3.3.0) -oct-4-ene (tbo), 1,4,6-triazabicyclo (3.4.0) - non-4-en (tbn). 1,4,6-triazabicyclo (3.5.0) -dec-4-ene (tbd) or 1,5,6-triazabicyclo (3.5.0) undec-4-ene (tbu) as dopant possible.

The organic electronic component can be an organic light-emitting Have or be diode. In this case, the active area suitable be in the switched-on operating an electromagnetic To emit radiation with an emission spectrum. Especially can be the electromagnetic radiation generated in the active area through the first charge carrier transport layer and be emitted through the first transparent electrode. In the event of a transparent second electrode may be that in the active region generated electromagnetic radiation also through the second electrode be radiated. The emission spectrum preferably comprises one or more wavelengths from a visible spectral range.

in the switched electronic operating state, the predetermined Color impression of the first charge carrier transport layer thereby no longer be discernible that this is due to the active area generated electromagnetic radiation is outshined.

The Emission spectrum and the first absorption spectrum can thereby be at least partially different. That can mean that, at least a part of the electromagnetic radiation generated by the active region without from the first charge carrier transport layer this can be absorbed by being absorbed. The emission spectrum and the first absorption spectrum can additionally or alternatively at least partially the same.

Farther it may be advantageous if the first charge carrier transport layer a saturable one Has absorption coefficient. That can be at least one partial equality of emission spectrum and first absorption spectrum mean that a small part, that is preferably less than 10% and more preferably less than 1%, that of the active region generated electromagnetic radiation in the charge-transfer complexes the first charge carrier transport layer and thereby from the first charge carrier transport layer Although it can be absorbed, the concentration of charge-transfer complexes but not enough, a larger share the electromagnetic radiation emitted by the active region to absorb. This allows the remaining, larger part the electromagnetic radiation generated in the active region the first charge carrier transport layer traverse and be emitted from the OLED.

The emission spectrum and the first absorption spectrum can be the same, for example, whereby the OLED can produce a predetermined color impression in the switched-off electronic operating state and radiate electromagnetic radiation with a color impression complementary to this color impression in the switched-on electronic operating state. By way of example only, the first absorption spectrum and the emission spectrum may be in a yellow wavelength range. While such an OLED configured in the on-line electronic mode can therefore shine yellow, it appears bluish in the off electronic mode. Furthermore, the emission spectrum and the first absorption spectrum can be independent of each other. By way of example, a component can emit green and be yellow in the switched-off operating state. For example, a device that emits red in the switched-on operating state may also have a red one in the switched-off state Color impression.

Provided the OLED has a second charge carrier transport layer as described above , the second absorption spectrum of the second charge carrier transport layer one or more features as related to the first absorption spectrum exhibit.

The Organic electronic component can continue to be a substrate exhibit. The transparent first electrode may be on the substrate and arranged between the substrate and the organic layer sequence be. In this case, the substrate may also be transparent, so that the predetermined color impression of the first charge carrier transport layer in the off state through the substrate and through the first electrode is perceptible therethrough. Is this organic electronic component designed as an OLED, which can be active in the Area generated electromagnetic radiation in this case also are emitted through the substrate and the OLED is designed as a so-called "bottom emitter".

Farther For example, the transparent first electrode may also be seen over the substrate from the substrate be arranged organic layer sequence. Is this organic electronic Component designed as OLED, the generated in the active area Electromagnetic radiation in this case in one of the substrate away radiated emission direction and the OLED is designed as a so-called "top emitter".

is Also, the second electrode made transparent, can be designed as an OLED organic Electronic component also be designed emitting on both sides.

For example the substrate glass, quartz, plastic films, metal, metal foils, Silicon wafers or other suitable substrate material include.

The transparent first electrode may for example be designed as an anode and thus as a hole-injecting Serve material. In this case, the first electrode, for example, a have transparent conductive oxide or of a transparent consist of conductive oxide.

Transparent conductive oxides ("TCO" for short) are transparent, conductive materials, usually 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, SnO ₂ or In ₂ O _{3 also} include ternary metal oxygen compounds such as Zn ₂ SnO ₄ , CdSnO ₃ , ZnSnO ₃ , MgIn ₂ O ₄ , GaInO ₃ , Zn ₂ In ₂ O ₅ or In ₄ Sn ₃ O ₁₂ or mixtures of different transparent conductive oxides to the group of TCOs. Furthermore, the TCOs do not necessarily correspond to a stoichiometric composition and may also be p- or n-doped.

The organic layer sequence may be in addition to the above for the first and optionally for the second Carrier transport layer mentioned materials further layers with organic polymers, organic oligomers, organic monomers, organic small, non-polymeric molecules ( "Small molecules ") or combinations thereof. In this case, the organic layer sequence in addition to the first and the second charge carrier transport layer more functional layers, such as further charge carrier transport layers, charge carrier injection layers, Carrier blocking layers and in the case of an OLED electroluminescent active region Have layers. An electroluminescent layer can thereby be suitable, by recombination of electrons and holes electromagnetic Generate radiation. Dependent from the materials in the functional layers and in particular in the active region of the organic layer sequence, the generated electromagnetic radiation individual wavelengths or areas or combinations from an ultraviolet to infrared wavelength range and more preferably from a visible wavelength range exhibit.

The second electrode may be designed as a cathode and thus as an electron-injecting material serve. As cathode material can especially aluminum, barium, indium, silver, Gold, magnesium, calcium or lithium as well as compounds, combinations and alloys thereof prove beneficial. In addition, the second electrode facing on one of the organic layer sequence Side have a layer comprising LiF, the good electron injection properties having. Alternatively or additionally the second electrode also one of the above TCOs or a Layer sequence of TCO layers and a metal layer. The second electrode may also be transparent. It can possible be that in case of doping the electron transport layer is, the electron emission from the cathode independent of the work function of the metal is d. H. that anyone can do here described metals and / or TCOs can be used.

alternative can the first electrode as the cathode and the second electrode as Anode executed be.

The first and / or the second electrode Kings nen be formed over a large area. As a result, in the case of an OLED, a large-area radiation of the electromagnetic radiation generated in the active region can be made possible. "Large area" may mean that the organic electronic component 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. Alternatively or additionally, the first and / or the second electrode may be structured at least in partial regions. As a result, a structured radiation of the electromagnetic radiation generated in the active region can be made possible, for example in the form of pixels or pictograms.

Farther The organic electronic component can also be an organic Photodetector, an organic solar cell and / or an organic Have or be transistor.

The organic electronic component may have an encapsulation to achieve, for example, for the first and second electrode and the organic layer sequence protection against moisture and / or oxidizing substances such as oxygen. The encapsulation may comprise one or more layers, wherein the layers of the encapsulation may be, for example, planarization layers, barrier layers, water and / or oxygen absorbing layers, tie layers or combinations thereof. The encapsulation can have, for example, a cover in the form of a cap, in particular a cantilever cap, and / or a layer or layer sequence in the form of a thin-film encapsulation on or above the electrodes and the organic layer sequence. Suitable materials may include, for example, glass, plastics, metals, metal oxides, non-metal oxides or non-metal nitrides such as SiO _x or SiN _x , ceramics or combinations thereof. The encapsulation may have, for example, barrier layers and / or planarization layers. Furthermore, the cover can also be designed as a laminate.

The Encapsulation can still be transparent, so for example the first charge carrier transport layer perceptible through the encapsulation and the first electrode is.

Further advantages and advantageous embodiments and developments of the invention will become apparent from the following in connection with the 1A to 2 B described embodiments.

It demonstrate:

1A and 1B schematic representations of an organic electronic component according to an embodiment and

2A and 2 B schematic representations of an organic electronic component according to another embodiment.

In the embodiments and figures can same or equivalent components, each with the same Be provided with reference numerals. The illustrated elements and their proportions with each other are basically not as true to scale to look at, rather individual elements, such as layers, components, components and areas for better presentation and / or better Understanding exaggerated thick or large be shown.

In The following figures are organic electronic components shown purely by way of example as organic light-emitting Diode executed are. Alternatively or in addition can do this the organic electronic components also photodetectors, Have solar cells and / or organic transistors or as such be formed.

In the 1A and 1B is an organic electronic component 100 in a switched-off electronic operating state ( 1A ) and in an activated electronic operating state ( 1B ).

The OLED organic electronic component 100 has a substrate 4 made of glass, on which a transparent first electrode 1 and a second electrode 2 are arranged. Between the transparent first electrode 1 and the second electrode 2 is an organic layer sequence 3 is arranged. In the embodiment shown, the organic electronic component is thus designed as a bottom emitter. The organic electronic component 100 may further comprise an encapsulation as described in the general part, which is not shown here for reasons of clarity.

The organic layer sequence 3 has an active area 30 and a first charge carrier transport layer 31 on. The first charge carrier transport layer 31 is between the first electrode 1 and the active area 30 arranged.

The transparent first electrode 1 In the exemplary embodiment shown, it is made of indium tin oxide (ITO) and serves as the anode, while the second electrode has a 0.7 nm thick LiF layer and a 200 nm thick aluminum layer.

The first charge carrier transport layer 31 has a matrix material and a dopant that form charge-transfer complexes. The charge-transfer complexes have a first absorption spectrum. Electromagnetic radiation having a wavelength in the absorption region can be absorbed by the charge-transfer complexes while exciting them. The part of an externally on the organic electronic component 100 incident electromagnetic radiation, indicated here by means of the arrows 90 that matches the absorption spectrum is thus absorbed while the non-absorbed part 91 the electromagnetic radiation 90 from the first charge carrier transport layer 31 scattered and reflected. This is the first charge carrier transport layer 31 perceived by an external observer and calls in the off electronic operating state of the organic electronic device 100 a predetermined color impression in the form of electromagnetic radiation 91 out.

In the exemplary embodiment shown, there is the first charge carrier transport layer 31 from NPB as matrix material p-doped with 5% Re ₂ O ₇ . The dopant is homogeneously distributed in the matrix material. This results in a uniform yellowish color impression in the off state.

The active area 30 has a 40 nm thick layer of tris (8-hydroxyquinoline) aluminum (Alq ₃ ) as a fluorescent electroluminescent material which also serves as an electron transport material. Between the first charge carrier transport layer 31 and the active area 30 For example, a 10 nm thick NPB layer (not shown) is located, which blocks the hole injection from the first charge carrier transport layer 31 in the active area 30 improved. Alternatively, the first charge carrier transport layer 31 also have the dopant with a thickness gradient described in the general part in the matrix material, wherein the dopant concentration can decrease continuously or abruptly toward the active region.

As in 1B through the arrows 93 is indicated, the organic electronic component emits 100 in the switched-on operating state by the first charge carrier transport layer 31 , the first electrode 1 and the substrate 4 green-colored electromagnetic radiation. Through the dashed arrows 90 and 91 It is indicated that, although still electromagnetic radiation from the outside to the organic electronic component 100 falls, can be scattered and reflected, but that the resulting color impression of the electromagnetic radiation generated in the active area 93 is overshadowed and therefore imperceptible in the sense described above.

In further embodiments of organic electronic components, each having a structure according to the component 100 is the charge carrier transport layer 31 as a 50 nm thick layer with NPB as matrix material and with Re ₂ O ₅ as a dopant with dopant concentration of 5%, 20% and 50% executed. It turns out that the perceptible color impression of the components in the switched-off electronic operating state changes with increasing concentration of the dopant from light blue to deep blue. In the switched on electronic operating state always green electromagnetic radiation 93 is emitted.

In further embodiments of organic electronic components, each having a structure according to the component 100 For example, 1T-NATA, DPBIC, spiro-TAD, NPB, GBPy, CBP and hexaphenylbenzene were used as matrix materials in various combinations and concentrations with MoO ₃ and Re ₂ O ₇ .

Measurements were carried out with the aforementioned undoped matrix materials and with a dopant addition of 5% and 10% MoO ₃ . It was found that with increasing MoO ₃ concentration and NPB or SPiro-TAD as matrix materials, a stronger red-brown color impression can be produced. On the other hand, with 1T-NATA as the matrix material, a green color impression can be aroused with GBPy or DPBIC as the matrix material. With CBP and hexaphenylbenzene as matrix materials, regardless of the concentration of MoO _3, only discoloration but hardly any color changes were found.

In a device with a first charge carrier transport layer with GBPy as the matrix material and 10% MoO ₃ as the dopant, virtually no difference in the luminous impression in the switched-on operating state could be ascertained in comparison to a device with an undoped GBPy charge carrier transport layer. The doped first charge carrier transport layer had no absorption for wavelengths above 400 nanometers and still no own emission. The conductivity of the first charge carrier transport layer, however, could be increased by four orders of magnitude thanks to the doping.

In components with a first charge carrier transport layer with DPBIC as matrix material and 5% or 10% MoO ₃ as dopant, virtually no difference in the luminous impression in the switched-on operating state could be determined in comparison with a component with an undoped DPBIC charge carrier transport layer. The doped first charge carrier transport layer had virtually no absorption for Wel lenlängen over 380 nanometers. In addition, for a doping concentration of 5% MoO ₃ as dopant, an emission suppressed by a factor of 50 could be detected in comparison to undoped DPBIC and for a doping concentration of 10% MoO ₃ no emission at all. The conductivity of the first charge carrier transport layer, however, could be increased by six to seven orders of magnitude thanks to the doping.

Further measurements were carried out with the aforementioned undoped matrix materials and with a dopant addition of 5% and 10% Re ₂ O ₇ . It was found that with increasing Re ₂ O ₇ concentration and NPB or SPiro-TAD as matrix materials a stronger red-brown color impression can be produced. By contrast, 1T-NATA as the matrix material can produce a green color impression, while with DPBIC as matrix material and increasing Re ₂ O ₇ concentration, a darkening of the color print can be detected. With GBPy, CBP and hexaphenylbenzene as matrix materials, irrespective of the Re ₂ O ₇ concentration, only discoloration but hardly any color changes were found. the slightest color changes were found for CBP and hexaphenylbenzene as matrix materials.

In a component having a first charge carrier transport layer with DPBIC as matrix material and 5% or 10% Re ₂ O ₇ as dopant, it was practically impossible to detect a difference in the luminous impression in the switched-on operating state compared to a component with an undoped DPBIC charge carrier transport layer. The doped first charge carrier transport layer had virtually no absorption for wavelengths above 400 nanometers and no own emission. On the other hand, the conductivity of the first charge carrier transport layer could be increased thanks to the doping with Re ₂ O ₇ , whereby a higher conductivity could be achieved with a dopant concentration of 5% than with a dopant concentration of 10%.

In a further embodiment of an organic electronic component having a structure according to the component 100 has the charge carrier transport layer 31 NPB as matrix material and di-rhodium tetra-trifluoroacetate as dopant at a thickness of 200 nm. While in the switched on electronic operating state green electromagnetic radiation 93 is emitted, awakens the charge carrier transport layer 31 in the off electronic operating state a bluish color impression.

An organic electronic component as a comparative component with a structure according to the component 100 but an undoped charge carrier transport layer 31 from NPB, also emits green electromagnetic radiation 93 and awakens in the off electronic mode but only a pale blue color impression with low color saturation. The exemplary embodiments shown here purely by way of example thus show that a predetermined color impression of the organic electronic component 100 can be set in the switched-off electronic operating state and selectable by means of the choice of the matrix material and the dopant, while the electromagnetic radiation emitted in the switched-on electronic operating state can always produce the same luminous impression.

In the 2A and 2 B is another embodiment of an organic electronic device 200 in a switched-off electronic operating state ( 2A ) and in an activated electronic operating state ( 2 B ), which is a modification of the previous embodiment.

In contrast to the component 100 of the 1A and 1B has the organic electronic component 200 additionally a transparent second electrode 2 from a transparent metal film, as well as a second charge carrier transport layer 32 between the active area 30 and the second electrode 2 , The organic electronic component 200 is thus formed in the embodiment shown as a double-sided emitting OLED. The first charge carrier transport layer 31 can be performed as described in connection with the previous embodiments and, for example, in the off electronic operating condition a light blue color impression.

The second charge carrier transport layer 32 comprises a matrix material and a dopant that form charge-transfer complexes that are part of the exterior of the device 200 falling electromagnetic radiation 90 absorb with a second absorption spectrum. The non-absorbed electromagnetic radiation, here by the arrows 92 is indicated by an external observer as a predetermined color impression by the second electrode 2 imperceptible. The color impression caused by the second charge carrier transport layer 32 through the second electrode 2 can be perceived in the off electronic operating state, it may be different from the color impression, by the first electrode 1 due to the first charge carrier transport layer 31 is perceptible.

The second charge carrier transport layer 32 is 150 nm thick in the embodiment shown and has BCP as matrix material and Cs ₂ CO ₃ as Do animal matter with a concentration of 10%. This awakens the second charge carrier transport layer 32 in the off electronic operating state a deep blue color impression with an external observer. In the switched-on operating state as in 2 B shown, this color impression is due to the active area 30 generated electromagnetic radiation that awakens as in the previous embodiments, a green light impression.

While the organic electronic device in the off electronic operating state by the first charge carrier transport layer 31 can give a different color impression than by the second charge carrier transport layer 32 , is in the switched-electronic operating state on both sides of the same light impression by the electromagnetic radiation generated in the active area 93 awakened.

In a further embodiment of an organic electronic component according to the component 200 has the second charge carrier transport layer 32 at a thickness of 150 nm as a matrix material and as the dopant BPyPyP Cs ₂ CO ₃ at a concentration of 10%. The charge transfer band of the second charge carrier transport layer 32 is so intense that these for the color impression by the second electrode 2 is determined by. As a result, the second charge carrier transport layer 32 in the off electronic operating state a red color impression, while in the switched-electronic operating state again green electromagnetic radiation is emitted. It should be noted that an organic electronic device with an NPB Alq ₃ material system always emits green. By the charge transport layers described here, the external appearance can be set almost arbitrarily.

The Features of the embodiments described herein are purely exemplary and not restrictive. In particular, alternatively or in addition to the combinations of matrix materials and dopants described here are in the organic electronic components shown here embodiments also matrix materials and dopants as in general part described possible.

The The invention is not by the description based on the embodiments limited to these. Rather, the invention encompasses every new feature as well as every combination of features, in particular any combination of features in the claims includes, even if this feature or this combination itself not explicitly in the patent claims or embodiments is specified.

Claims (28)

Organic electronic component, comprising: a transparent first electrode ( 1 ), - an organic layer sequence ( 3 ) with a charge carrier transport layer ( 31 ) and an active area ( 30 ) and - a second electrode ( 2 ), wherein - the first charge carrier transport layer ( 31 ) between the active area ( 30 ) and the first electrode ( 1 ), - the first charge carrier transport layer ( 31 ) comprises a matrix material with a dopant, and - the matrix material and the dopant form charge transfer complexes which form part of an electromagnetic radiation incident on the organic radiation-emitting component from the outside ( 90 ) absorb with a first absorption spectrum and in a switched off electronic operating state a predetermined color impression ( 91 ) caused by the first electrode ( 1 ) is perceptible by an external observer. Component according to claim 1, wherein - the first charge carrier transport layer ( 31 ) directly to the first electrode ( 1 ) adjoins. Component according to claim 1 or 2, wherein - the first charge carrier transport layer ( 31 ) comprises a layer stack comprising at least a first layer and a second layer, - the first layer and the second layer each comprise a matrix material and a dopant and - the first and second layer are different from one another. Component according to one of the preceding claims, wherein - the organic layer sequence ( 3 ) a second charge carrier transport layer ( 32 ) between the active area ( 30 ) and the second electrode ( 2 ) and - the second charge carrier transport layer ( 32 ) comprises a matrix material with a dopant and - the matrix material and the dopant of the second charge carrier transport layer ( 32 ) Form charge-transfer complexes which form part of an electromagnetic radiation falling externally on the organic electronic component ( 90 ) absorb with a second absorption spectrum. Component according to the preceding claim, wherein - the second electrode ( 2 ) is transparent and - the second charge carrier transport layer ( 32 ) in the switched off electronic operating state ei NEN predetermined color impression ( 92 ) caused by the second electrode ( 2 ) is perceptible by an external observer. Component according to one of the preceding claims, wherein - the first charge carrier transport layer ( 31 ) is a hole transport layer. Component according to claim 6, wherein - The dopant a metal oxide, an organometallic compound, an organic one Material or a mixture thereof. Component according to claim 7, wherein - The dopant a metal oxide with one or more metals from a group which is formed by tungsten, molybdenum, vanadium and rhenium. The device of claim 8, wherein - the dopant comprises at least one of WO ₃ , MoO ₃ , V ₂ O ₅ and Re ₂ O ₅ . Component according to one of claims 7 to 9, wherein - The dopant an organometallic compound with ruthenium and / or rhodium having. Component according to claim 10, wherein - the organometallic Compound has trifluoroacetate. Component according to one of claims 7 to 11, wherein - The dopant an aromatic organic material having at least one substituent comprising fluorine and / or cyanide. Component according to one of claims 1 to 5, wherein - the first charge carrier transport layer ( 32 ) is an electron transport layer. Component according to claim 13, wherein - The dopant an alkali metal salt, an alkaline earth metal salt, an organometallic salt Compounds or a mixture thereof. The device of claim 14, wherein - The dopant having a carbonate. Component according to claim 14 or 15, wherein - The dopant cesium having. Component according to one of claims 14 to 16, wherein - the organometallic Compound has a metallocene. Component according to one of claims 14 to 17, wherein - the organometallic Compound a metal complex with a hydropyrimidopyrimidine having. Component according to one of claims 14 to 18, wherein - the organometallic Compound of at least one or more metals from a group which is formed by chromium, tungsten and molybdenum. Component according to one of the preceding claims, wherein - The dopant has a concentration of at least 5% in the matrix material. Component according to one of the preceding claims, wherein - the dopant has a concentration in the matrix material, which to the active area ( 30 ) decreases. Component according to one of the preceding claims, wherein - the matrix material is selected from a group, the phenanthroline derivatives, imidazole derivatives, triazole derivatives, oxadiazole derivatives, Phenyl-containing compounds, compounds with condensed aromatics, Carbazole-containing compounds, fluorene derivatives, spiro-fluorene derivatives and pyridine-containing compounds and combinations of at least comprises two or more of said materials. Component according to one of the preceding claims, wherein - the component comprises an organic light-emitting diode (OLED) and - the active region ( 30 ) is suitable, in an operating state, an electromagnetic radiation ( 93 ) with an emission spectrum. The device of claim 23, wherein - the emission spectrum and the first absorption spectrum at least partially different are. Component according to claim 23 or 24, wherein - the emission spectrum and the first absorption spectrum are at least partially equal. Component according to one of claims 23 to 25, wherein - the first charge carrier transport layer ( 31 ) has a saturable absorption coefficient. The device of claim 26, wherein - the first charge carrier transport layer ( 31 ) in the switched-off operating state perceptible color impression in the switched-on operating state is imperceptible. Component according to one of the preceding claims, wherein - the component an organic photodetector, an organic solar cell and / or comprises an organic transistor.