WO2016087548A1

WO2016087548A1 - Organic light emitting component comprising a light influencing layer structure and method for producing a light influencing layer structure

Info

Publication number: WO2016087548A1
Application number: PCT/EP2015/078412
Authority: WO
Inventors: Kilian REGAU; Andreas Rausch; Daniel Riedel; Erwin Lang; Michael Popp; Nina Riegel; Jörg FARRNBACHER
Original assignee: Osram Oled Gmbh
Priority date: 2014-12-03
Filing date: 2015-12-02
Publication date: 2016-06-09
Also published as: DE102014117775A1

Abstract

The invention relates to an organic light emitting component (1) comprising a light influencing layer structure (2) and to a method for producing a light influencing layer structure (2) for an organic light emitting component (1). The organic light emitting component (1) has a first electrode (20), an organic functional layer structure (22) above the first electrode (20), and a second electrode (23) above the organic functional layer structure (22). At least one light influencing layer structure (2) is located downstream, in the radiating direction, of the organic functional layer structure (22), which light influencing layer structure has a plurality of microstructures (3) each having a high aspect ratio.

Description

description

Organic light emitting device with a

light-influencing layer structure and method for producing a light-influencing layer structure

The invention relates to an organic light-emitting component with an organic functional

Layer structure and with a light-influencing

A layer structure and a method for producing a light-influencing layer structure for such an organic light-emitting device.

Optoelectronic components which emit light can be, for example, light-emitting diodes (LEDs) or organic ones

Be light emitting diodes (OLEDs). An OLED may have an anode and a cathode with an organic functional layer system therebetween. The organic functional

Layer system may include one or more

Emitter layers in which electromagnetic radiation is generated, a charge carrier pair generation layer structure of two or more

Charge pair generation charge generating layer (CGL) and one or more electron block layers, also referred to as hole transport layer (HT), and one or more hole block layers, also referred to as an electron transport layer (E) ("electron transport layer" - ETL) to direct the flow of current.

Such organic light-emitting components usually form a surface light source, often a

Lambertian radiation has. Especially in general lighting, however, a lambertsche applies

Radiation characteristic often considered not optimal. In particular, such surface light sources at high brightness from 3000 Cd / m ^2, the glare-free at AbstrahlwinkeIn between 65 ° up to 90 ° to the ceiling standard, which may violate applicable standards and / or guidelines.

Conventionally, it has been known to modify the emission characteristics of organic light-emitting components by additional elements and / or to shape them according to the desired application, such as by adapted housings, lampshades, diffusers for beam attenuation, beam deflectors, shields, reflectors and / or

near-surface, mostly over the entire surface trained

Decoupling structures.

Conventional organic light-emitting devices, however, often have the disadvantage that they require the at least one additional element to achieve the desired

To ensure emission characteristics. It is also

possible that such organic light-emitting

Components with the additional element do not fully comply with applicable standards and / or guidelines. Also are usually desired by conventional additional elements

Abstrahlcharakteristiken such as spot applications not feasible to the desired extent.

An object of the invention is to provide an organic

Specify light-emitting device that provides a desired radiation characteristics in the required and / or desired dimensions, in particular without requiring an additional element, and / or that corresponds to the standards and / or guidelines applicable here.

Another object of the invention is to provide a method for producing a light-influencing layer structure of an organic light-emitting component, which can be carried out simply and / or inexpensively.

The tasks are solved by the characteristics of the

independent claims. An object is achieved according to an aspect of the invention by an organic light-emitting component

comprising a first electrode, an organic functional layer structure over the first electrode, and a second electrode over the organic functional one

Layer structure. The organic functional

Layer structure is arranged downstream in the emission at least one light-influencing layer structure. The light-influencing layer structure has a plurality of microstructures each having a high aspect ratio.

The microstructures are recesses in the

light-influencing layer structure. In this case, the recesses can completely or only partially penetrate the light-influencing layer structure.

In this case, a hermetic sealing of the organic functional layer structure is advantageously continued

given. The recesses are formed in the emission direction of the organic functional layer structure. The recesses can be made according to their desired

Light influence to be aligned at an angle to the emission direction. The microstructures designed as a recess enable a desired influencing of the emission direction of the organic functional

Layer structure in compliance with applicable standards and

Guidelines.

The microstructures are light channels. The microstructures are thus suitable for light guidance and

formed, whereby a desired and / or required radiation deflection is made possible. For example, the light channels are tubular. The aspect ratio of the microstructures is the respective

Ratio of a length of the microstructure to a width of the microstructure. Under the aspect ratio is in the present application, in particular the ratio of the length of Microstructure to its width, especially to her

smallest lateral extent, to understand.

The high aspect ratio is in a range between 100,000 to 1 and 1000 to 1, in particular in a range between 10,000 to 1 and 5,000 to 1. The ratio of length to width of the microstructures is thus above average, thus advantageously an arbitrarily changeable beam distribution can be realized ,

The organic light-emitting component accordingly has the same for changing and / or influencing the emission characteristic of the organic functional layer structure

light-influencing layer structure on. These

light-influencing layer structure has such

Microstructures on that the emission direction of the

organic functional layer structure can be changed in any desired manner, without violating existing standards and / or guidelines. In other words, while maintaining standards, the

Radiation characteristic of area light sources optimized and / or adjusted individually and simultaneously adapted to predetermined regulations. lateral

juxtaposed microstructures may be the same or different.

Due to the light-influencing layer structure, additional elements such as reflectors, umbrellas or the like are not necessary to achieve a desired

To achieve radiation characteristic of the organic light-emitting device. In particular, alone with the light-influencing layer structure

Abstrahlcharakteristiken from spot applications to the basic lighting possible.

This corresponding changing, shaping and / or influencing the emission characteristic of the particular as

Surface light source formed organic Light emitting device is presently by the

Realizes microstructures in the light-influencing layer structure, which in particular a high

Have aspect ratio. In other words, the high aspect ratio microstructures can locally change the emission direction in any desired manner. For example, the emission direction can be directed and / or bundled in such a way that, with appropriate application, such as in

Backlights of laptops, the screen is only visible from a person directly in front of it and is not visible from a person who is slightly laterally. The first electrode and the second electrode are designed to electrically contact the organic functional layer structure. For example, the first electrode and the second electrode are each formed as an electrically conductive electrode layer.

The organic functional layer structure is intended to facilitate the conversion of electrically generated data or energy into light emission. For example, the organic functional layer structure is an optically active region of the organic light-emitting

Component, in particular an OLED.

The light-influencing layer structure is for it

provided by their integrated microstructures to influence the radiation emitted by the organic functional layer structure radiation, for example, to focus, deflect, convert and / or reflect. Here, the light-influencing layer structure consists only of a single layer. Alternatively, the light-influencing layer structure may be formed as a layer stack. In this case, it is again conceivable that individual layers of this layer stack assume different functions, in particular those of the organic Functional layer structure radiation in different ways affect and / or more

Change properties of the organic light-emitting device. The light-influencing layer structure may be formed as a body, for example as a glass body. The light-influencing layer structure may be arranged downstream of the organic functional layer structure over its entire area in the emission direction. Alternatively, the light-influencing layer structure can only one

Be subordinate surface of the organic functional layer structure and / or cover this.

The microstructures in the light-influencing

Layer structure are three-dimensional structures. The

Microstructures are thus formed as three-dimensional shapes in the light-influencing layer structure. Here, the three-dimensional structures are provided for and particularly suitable for the organic

Functional layer structure to influence emitted radiation, for example, to change their beam path and direct.

In particular, the beam path of the radiation emitted by the organic functional layer structure is due to multiple reflection, for example on inner walls of the

Microstructures and / or by absorption of light, which is not directed as intended or intended, deflected and / or prevented. This makes it possible to direct rays by reflection on the microstructures in a direction provided or absorb, so that at one

Light exit side of the microstructures only the

Arrive rays that have a desired direction.

In particular, the light-influencing layer structure has a plurality of microstructures, which preferably laterally adjoin one another in the light-influencing

Layer structure are arranged. In particular, the microstructures are laterally adjacent to each other, that is perpendicular to the emission direction of the organic functional

Layers structure next to each other, arranged. The

Microstructures may be identical in shape and / or size. Alternatively, for example, for a desired influence and

Change in the radiation pattern, the microstructures differ, for example, in their shape, size and / or orientation. According to a development, the length of the microstructure is in a range between 100 μm and 5 mm in each case,

for example between 100 .mu.m and 3 mm, for example between 500 .mu.m and 1.5 mm. According to a development, the width of the microstructure is in each case in a range between 1 μm and 100 μm,

for example, between 1.5 microns and 50 microns, for example between 2 microns and 10 microns. The widths of the microstructures for influencing the light therefore have magnitudes in the micrometer range, whereas the lengths are in the millimeter range or at least in the tenth of a millimeter range. Through this

Microstructures may be the direction of emission of the emitted from the organic functional layer structure

Radiation can be changed in the desired manner, without violating existing standards and / or guidelines.

According to a development, the microstructures change a radiation characteristic of the organic functional

Layer structure, preferably in compliance with applicable standards and guidelines. A desired and / or required emission characteristic of the organic light-emitting component as a whole can thus advantageously

be guaranteed. According to a development, the microstructures change the emission characteristic such that at least one spot is generated. By means of the spot is a defined

Partial area illuminable. The organic

functional layer structure as surface light source

be formed, wherein the downstream in the emission direction of light-influencing layer structure advantageously allows the modification of this surface light source in the spot, thus advantageously desired applications can be realized. In particular, such is an extremely directional

Abstrahlcharakteristik the organic light-emitting device possible. This can advantageously

for example, a lighting of a screen,

For example, a laptop, which is visible only by a user who is in front of it, is visible and by a user who is a little laterally offset, is not visible.

According to a further development, laterally adjacent, differently formed microstructures are arranged at least in regions in the light-influencing layer structure.

Through the local over the light-influencing

Layer structure of varying embodiments of

Microstructures advantageously allow a local setting of the emission characteristics and / or

Direction of radiation in the desired and / or predetermined manner. In particular, such a light-influencing

Layer structure are provided, which the

Radiation characteristic of the organic functional

Layer structure regionally and / or locally

changed in different ways. Locally and / or locally different effects due to locally different modes of action can be generated in this way. In the present case, "differently shaped microstructures" is to be understood in particular as meaning that the

Microstructures in size, shape, orientation and / or further embodiment, such as in a

Coating, different.

With regard to their shape of the microstructures, for example, light channels, tubes, recesses, cylinder-like or cylindrical shapes or shapes with rounded, round-like or rounded side walls are conceivable.

For example, the microstructures in their

Cross section of a trapezoidal shape, a rectangular shape, a

Triangular shape or a parallelogram shape.

The microstructures can also be at their angle, they with a footprint of the light-influencing

Include layer structure differ. Here are angles between 1 ° and 90 ° of a side wall of the microstructure to the base and / or interface of

light-influencing layer structure possible.

By "laterally adjacent" is to be understood inter alia that the microstructures in the

light-influencing layer structure next to each other and / or adjacent to each other in the direction perpendicular to

Radiation direction are arranged. By "at least regionally" is to be understood here in particular that not all adjacent

Microstructures must differ in their training. Rather, it is possible that locally limited in the

light-influencing layer structure substantially identically formed microstructures are arranged.

This locally limited area with identically formed microstructures adjoins, for example, another locally limited area with again identically designed microstructures, the microstructures of the individual areas differing from one another.

According to a development, the light-influencing

Layer structure a carrier or a cover body of the organic light emitting device. Through this

Integration of the microstructures in elements that are already part of the organic light-emitting component, advantageously no additional and / or additional elements are necessary for influencing the light. The organic

Light emitting device can thus cost

getting produced.

The carrier is, for example, a substrate, for example a glass or plastic substrate, above which preferably at least one transparent electrode for electrical

Connecting the organic functional layer structure is applied. The cover has, for example, a

Lid, for example, a glass lid a

Adhesive layer and / or an encapsulation and closes the organic functional layer structure, for example, hermetically sealed.

According to an alternative development is the

light-influencing layer structure arranged on the support or the cover body of the organic light-emitting component. In this case, the light-influencing

Layer structure applied as an additional layer on existing elements of the organic light-emitting device. The individual elements of the organic

light emitting device, such as the carrier or the cover body, so advantageously not be suitable for forming integrated microstructures. Thus, the carrier and / or the cover body are more flexible in their design, such as in their choice of material.

According to a development, the microstructures exhibit

at least partially a coating and / or a

Fill material on that at least partially and / or

is completely incorporated in the microstructures. As a result, advantageously, the light emitted by the organic functional layer structure can be correspondingly further desired properties changed and / or influenced.

For example, the microstructures or at least a part of the microstructures have a mirror layer, a

Antireflection layer, an oxide layer, such as titanium oxide or aluminum oxide, a metal layer, such as

For example, an aluminum layer, and / or a

Converter layer on. In addition or alternatively, the

Microstructures or at least a portion of the microstructures with scattering material, converter material and / or materials of different refractive indices such as ceramic and / or silicone may be wholly or partially filled. According to a development, the light-influencing comprises

Layer structure a layer stack that extends along the emission direction of the organic functional

Layer structure and / or extending perpendicular thereto. The light-influencing layer structure thus consists of a plurality of individual layers which

stacked one above the other or arranged laterally next to one another. This advantageously makes it possible

Provide, for example, different

influencing layers, preferably in one

Production line.

According to a further development, at least partially

Layers of the layer stack of light-influencing

Layer structure different light influencing and / or further the organic light emitting device influencing properties. For example, one layer of the layer stack is an adhesion layer, another layer is a heat-conducting layer, a third layer is a scatter layer and / or a fourth layer is the layer

integrated microstructures formed and / or formed. The light-influencing layer structure thus has a multilayer structure with internal functional

Structures according to desired properties. As a result, advantageously a plurality of different light-influencing properties

be provided one above the other and / or side by side. Optionally, the microstructures may extend over multiple, for example, all, layers of the layer stack.

According to a development, the light-influencing

Layer structure as a film or as a film laminate

educated. Advantageously, so distinguished

light-influencing layer structure, which may also include a plurality of flatly stacked or juxtaposed films, by its flexible mechanical

Property off.

A problem is further solved by a method for

Producing a light-influencing layer structure which corresponds to an organic functional layer structure in

Radiation direction is arranged downstream, wherein in the

light-influencing layer structure by means of a

Laser pulse method, a plurality of recesses

are introduced, forming the light channels, wherein the

Light channels each have a high aspect ratio. The aspect ratio is the ratio of a length of the light channels to a width of the respective light channels, respectively, and the high aspect ratio is in a range between 100,000 to 1 and 1,000 to 1.

The method is characterized in particular by its simple and cost-effective implementation and by his

Flexibility regarding the particular design of the individual microstructures to desired requirements. The microstructures can be in the light-influencing

Layer structure before or after arranging the

be formed light-influencing layer structure.

Alternative embodiments and / or advantages concerning the light-influencing layer structure, the organic Functional layer structure, the organic light-emitting component and / or in each case components thereof are already carried out in connection with the respective product in the application above and of course find in the manufacturing process accordingly

Application, without being explicitly listed here again.

According to a development, the laser pulse method is performed with a pulse frequency in a range between 1 pulse per second to 3000 pulses per second.

Embodiments of the invention are illustrated in the figures and are explained in more detail below. Show it:

Figure 1 is a side sectional view of a

Embodiment of an organic light emitting device;

Figure 2 is a side sectional view of a

Embodiment of an organic light emitting device; Figure 3 is a side sectional view of a

Embodiment of an organic light emitting device;

Figure 4 is a side sectional view of a

Embodiment of an organic light emitting device.

In the following detailed description, reference is made to the accompanying drawings, which form a part of this specification, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology such as "top", "bottom", "front", "Back", "front", "rear", etc. with respect to the orientation of the figure (s) described

Components of embodiments in number

different orientations can be positioned, the directional terminology is illustrative and is in no way limiting. It should be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. It should be understood that the features of the various embodiments described herein may be combined with each other unless specifically stated otherwise. The following detailed description is therefore not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

In the context of this description, the terms

"connected", "connected" and "coupled" used to describe both direct and indirect

Connection, direct or indirect connection and direct or indirect coupling. In the figures, identical or similar elements are provided with identical reference numerals, as appropriate.

An organic light emitting device may be formed as an organic light emitting diode (OLED) or as an organic light emitting transistor. The light may, for example, be light in the visible range, UV light and / or infrared light. The organic light emitting device may be part of an integrated circuit in various embodiments. Furthermore, a plurality of organic light-emitting components may be provided,

For example, housed in a common housing.

Fig. 1 shows an embodiment of an organic light emitting device 1. The organic Light-emitting component 1 has a carrier 12. The carrier 12 may be translucent or transparent. The carrier 12 serves as a carrier element for electronic

Elements or layers, for example light-emitting elements. The carrier 12 may be, for example, plastic,

Metal, glass, quartz and / or have a semiconductor material or be formed therefrom. Furthermore, the carrier 12 may comprise or be formed from a plastic film or a laminate with one or more plastic films. The carrier 12 may be mechanically rigid or mechanically flexible.

On the support 12 is an organic functional

Layer structure formed. The organic functional layer structure has a first electrode layer 14, which has a first contact section 16, a second contact section 16

Contact portion 18 and a first electrode 20 has. The carrier 12 with the first electrode layer 14 may also be referred to as a substrate. A first one may not exist between the carrier 12 and the first electrode layer 14

represented barrier layer, for example, a first

Barrier thin film, be formed.

The first electrode 20 is electrically insulated from the first contact portion 16 by means of an electrical insulation barrier 21. The second contact portion 18 is electrically coupled to the first electrode 20 of the organic functional layer structure. The first electrode 20 may be formed as an anode or as a cathode. The first electrode 20 may be translucent or transparent. The first

Electrode 20 comprises an electrically conductive material, for example metal and / or a conductive transparent oxide (TCO) or a

Layer stacks of multiple layers comprising metals or TCOs. For example, the first electrode 20 may comprise a layer stack of a combination of a layer of a metal on a layer of a TCO, or vice versa. An example is a silver layer deposited on an indium-tin Oxide layer (ITO) is applied (Ag on ITO) or ITO-Ag-ITO multilayers. The first electrode 20 may alternatively or in addition to the materials mentioned:

Networks of metallic nanowires and particles, for example of Ag, networks of carbon nanotubes, graphene particles and layers and / or networks of semiconducting nanowires.

Above the first electrode 20 is an optically functional layer structure, for example an organic

functional layer structure 22, the organic

functional layer structure formed. The organic functional layer structure 22 may, for example, have one, two or more partial layers. For example, the organic functional layer structure 22 may be a

Hole injection layer, a hole transport layer, a

Emitter layer, an electron transport layer and / or an electron injection layer. The

Hole injection layer serves to reduce the band gap between first electrode and hole transport layer. In the hole transport layer, the hole conductivity is larger than the electron conductivity. The hole transport layer serves to transport the holes. In the electron transport layer, the electron conductivity is larger than that

Hole conductivity. The electron transport layer serves to transport the holes. The electron injection layer serves to reduce the band gap between the second electrode and the electron transport layer. Further, the organic functional layer structure 22 may be one, two or more

functional layer structure units, each having the said sub-layers and / or further intermediate layers.

Above the organic functional layer structure 22, 5 is a second electrode 23 of the organic functional

Layer structure is formed, which is electrically coupled to the first contact portion 16. The second electrode 23 may according to one of the embodiments of the first electrode 20 be formed, wherein the first electrode 20 and the second electrode 23 may be the same or different. The first electrode 20 serves, for example, as the anode or cathode of the organic functional layer structure. The second electrode 23 serves corresponding to the first electrode as the cathode or anode of the organic

functional layer structure.

The organic functional layer structure is a

electrically and / or optically active area. The active one

Area is, for example, the area of the organic light-emitting component 10 in which electric current flows for the operation of the organic light-emitting component 10 and / or in which electromagnetic radiation is generated. On or above the active area, a getter structure {not shown) may be arranged. The getter layer can be translucent, transparent or opaque. The getter layer may include or be formed of a material that absorbs and binds substances that are detrimental to the active area.

Above the second electrode 23 and partially over the first contact portion 16 and partially over the second one

Contact section 18 is an encapsulation layer 24 of the organic functional layer structure formed, which encapsulates the organic functional layer structure. The encapsulation layer 24 may be formed as a second barrier layer, for example as a second barrier thin layer. The encapsulation layer 24 may also be referred to as

Thin-layer encapsulation may be referred to. The

Encapsulation layer 24 forms a barrier to chemical contaminants or atmospheric agents, especially to water (moisture) and oxygen. The encapsulation layer 24 may be formed as a single layer, a layer stack, or a layered structure. The encapsulation layer 24 may include or be formed from: alumina, zinc oxide, zirconia,

Titanium oxide, hafnium oxide, tantalum oxide, lanthanum oxide, Silica, silicon nitride, silicon oxynitride, indium tin oxide, indium zinc oxide, aluminum doped zinc oxide, poly (p-phenylene terephthalamide), nylon 66, and mixtures and alloys thereof. Optionally, the first barrier layer may be formed on the carrier 12 corresponding to a configuration of the encapsulation layer 24.

In the encapsulation layer 24 are above the first

Contact section 16 a first recess of the

Encapsulation layer 24 and over the second contact portion 18, a second recess of the encapsulation layer 24th

educated. In the first recess of the

Encapsulation layer 24, a first contact region 32 is exposed and in the second recess of

Encapsulation layer 24, a second contact region 34 is exposed. The first contact region 32 serves for

electrical contacting of the first contact portion 16 and the second contact portion 34 is for electrical

Contacting the second contact portion 18.

Over the encapsulation layer 24, an adhesive layer 36 is formed. The adhesive layer 36 comprises, for example, an adhesive, for example an adhesive,

For example, a laminating adhesive, a paint and / or a resin. The adhesive layer 36 may comprise, for example, particles which scatter electromagnetic radiation, for example light-scattering particles.

Above the adhesive layer 36 is a cover body 38

educated. The adhesive layer 36 serves to secure the cover body 38 to the encapsulation layer 24. The cover body 38 has, for example, plastic, glass

and / or metal. For example, the cover body 38 may be formed substantially of glass and a thin

Metal layer, such as a metal foil, and / or a graphite layer, such as a graphite laminate, have on the glass body. The cover body 38 serves to protect the organic light-emitting component 1, for example, against mechanical forces from the outside. Furthermore, the cover body 38 for distributing and / or

Dissipating heat that is in the organic

light-emitting component 1 is generated. For example, the glass of the covering body 38 can serve as protection against external influences, and the metal layer of the covering body 38 can serve for distributing and / or dissipating the heat arising during operation of the organic light-emitting component 1.

The carrier 12 or the covering body 38 of the organic light-emitting component 1 may comprise a plurality of integrated microstructures, which are used for

Light influencing the light emitted from the organic functional layer structure 22 light are provided. The organic light emitting device 1 without the carrier 12 may also be referred to as the light emitting structure 10. The exemplary embodiment of the organic light-emitting component 1 of FIG. 1 is designed as a bottom emitter. In this case, the carrier 12 is a light-influencing

Layer structure 2 formed, the organic

functional layer structure 22 is arranged downstream in the emission direction. For influencing the light emitted by the organic functional layer structure 22, the plurality of microstructures 3 are formed in the light-influencing layer structure 2. These are in the

Embodiment of Figure 1 shown only schematically and are illustrated in the following figures.

The microstructures 3 are three-dimensional structures, in particular recesses in the light-influencing

Layer structure 2, which is the light-influencing

Layer structure 2 partially penetrate, while a hermetic tightness of the organic light-emitting device 1 is still given. The microstructures 3 serve as light channels which are suitable for guiding light. In particular, the light channels lead the light from the

organic functional layer structure 22 such way and in particular change the microstructures 3 the

Radiation characteristic of the organic functional

Layer structure 22 such that outside of the organic light-emitting device 1, for example on a wall, a floor or a table, at least one spot is generated. The emission direction of the light emitted by the organic light-emitting component 1 as a whole is therefore bundled into a spot, with which a

Glare-free especially for beam angles of 65 ° to 90 ° to the ceiling standards can be guaranteed. When using the organic light-emitting component 1, for example as a backlight for a computer, in particular a laptop, it can be made possible that the screen can only be viewed by a person who is directly in front of it and can not be seen by a person standing sideways. The microstructures 3 have a high aspect ratio, ie a high ratio of length to width. The high

Aspect ratio is in a range between 100000 to 1 and 1000 to 1, for example, between 10000 to 1 and 5000 to 1.

If different from the organic functional

Layer structure 22 emitted light in one of

Microstructures 3 propagates, so the light depending on the beam path along which it passes, once, twice or more times on the inner walls of the corresponding

Microstructure 3 are reflected. If the angle

between the beam path and the inner wall does not correspond to the angle of total reflection, only a part of the light is reflected in each reflection and the remaining part of the light is absorbed by the surrounding layer material and / or transmitted into the surrounding layer material. Since the angle of total reflection is the exception, only a part of the light is reflected in each reflection and the light is weakened. Only light along an optical path which is parallel to the extension direction of the corresponding microstructure 3 does not become

reflected and thus not weakened.

Due to the high aspect ratio of the microstructures 3 is already light that propagates in one of the microstructures 3 and extends along an optical path that only a small angle to the direction of extension of

corresponding microstructure 3 has, so often reflected on the corresponding inner wall, that only a small and / or negligible proportion of the light leaves the corresponding microstructure 3, without in the

penetrate adjacent layer material. The fact that the proportion of light is only slight or negligible may mean, for example, that it is so small that it is no longer perceptible to the naked eye and / or that the light is only less than 10%, for example less than 1%. that has the original intensity.

In contrast, light that propagates in the microstructure 3 and runs along an optical path that is parallel or at least approximately parallel to the

Extension direction of the corresponding microstructure 3, not at all or only a few times reflected on the inner walls of the corresponding microstructure 3 and is therefore not or only negligibly weakened and so the corresponding microstructure 3 substantially parallel to the extension direction of the corresponding

Leave microstructure 3 without going into the adjacent one

Penetrate layer material. That the light only

is weakened negligibly, may mean, for example, that it is weakened so little that the

Difference to the unattenuated light is no longer perceptible to the naked eye and / or that the light is attenuated by less than 10%, for example by less than 1%, based on the original intensity. Thus, by predetermining the extension direction, that is to say by means of predetermined formation of the microstructures 3, the main emission direction of the light emitted at a light exit side of the microstructures 3 can be predetermined.

Overall, such a desired radiation characteristic of the formed as a surface light source organic

be ensured light-emitting device 1 in compliance with applicable standards and guidelines. Additional elements, such as reflectors and screens, are advantageously not necessary.

Alternatively to the organic discussed above

light-emitting device 1, the organic

be designed as a top emitter light-emitting device. In this case, the covering body 38 has the microstructures 3.

Further alternatively, it is possible that the

light-influencing layer structure 2 as additional

Layer is formed, which is applied to the carrier 12 or on the cover body 38.

Next alternatively, the light-influencing

Layer structure 2 have one, two or more layers and / or a layer stack which extends along the

Emission direction of the organic functional

Layer structure 22 and / or extending perpendicular thereto.

In this case, the individual layers of the light-influencing layer structure 2 can have different light-influencing properties and / or properties influencing the organic light-emitting component 1.

Other possible embodiments of the light-influencing

Layer structure 2 are used in conjunction with the

Embodiments of Figures 2 to 4 explained. FIG. 2 shows an exemplary embodiment of an organic light-emitting component 1 which comprises the light-emitting structure 10 and the light-influencing layer structure 2. The light emitting structure 10 may alternatively or in addition to the carrier 12, which is not shown in Figure 2, be formed.

The light-influencing layer structure 2 has the

A plurality of microstructures 3, which are formed as light channels. A length L of the microstructures 3 is in each case in a range between 100 [im to 5 mm,

for example, between 100 microns to 3 mm, for example between 500 microns to 1.5 mm. The width B of the microstructures 3 lies in a range between 1 μπ \ to 100 μm,

For example, between 1.5 microns to 50 μτ ^η , for example, between 2 microns and 10 μτη, so that a total of high

Aspect ratio is generated.

Lateral adjacent microstructures 3a, 3b are at least partially designed differently, so they have

in particular a different shape, size and / or a different aspect ratio. In this case, the light-influencing layer structure 2 can have regions of identically designed microstructures 3, wherein

Microstructures 3 adjacent areas can distinguish. As a result, for example, a plurality of spots can be produced with the light-influencing layer structure 2.

A between a base of the light-influencing

Layer structure 2 and a side wall of the microstructure 3 included angle α can be between 1 ° and 180 °. A cross section of the microstructures 3 may be trapezoidal, rectangular, in the form of a parallelogram, triangular or cylindrical. Examples of possible shapes are shown inter alia in FIG. Alternatively, all microstructures 3 may be the same

be formed and in particular have the same width, the same length, the same extension direction and / or the same angle α. Alternatively or additionally, the width B over the entire length L may be constant. The microstructures 3 may be circular in cross-section,

for example, round or oval, or polygonal, for example, triangular, square or polygonal, be formed. FIG. 3 shows an exemplary embodiment of an organic light-emitting component 1 that has the light-emitting structure 10 and the light-influencing layer structure 2. The light-emitting structure 10 may alternatively or in addition to the support 12, which is not shown in Figure 3, be formed.

The light-influencing layer structure 2 has a

Coating 4 on the side facing away from the Iichtemittierenden structure 10 side. The coating 4 is a

Surface coating, such as a

Antireflection layer, a mirror layer, a

Metal layer or an oxide layer.

In addition to the coating 4, the microstructures 3 may also have an internal coating,

For example, a mirror layer or a

Antireflection layer on the inner walls of the microstructures 3. The internal coating is carried out for example by means of an ALD method (ALD: Atomic Layer Deposition).

Alternatively or additionally, the microstructures 3 may have a filling material, that is to say be completely or at least partially filled with the filling material. For example, the microstructures 3 are filled with a scattering material and / or with a converter material, so that further desired

light-influencing properties can be generated. 4 shows an exemplary embodiment of an organic light-emitting component 1 that has the light-emitting structure 10 and the light-influencing layer structure 2.

Between the light-emitting structure 10 and the

light-influencing layer structure 2, a functional layer 6 is arranged, for example, a scattering layer and / or a heat conducting layer. In particular, the

functional layer 6 be part of the light-influencing layer structure 2. The light-influencing

Layer structure 2 accordingly has a multilayer structure with functional properties. Alternatively to the stacked configuration of the multilayer structure of the light-influencing

Layer structure 2 is a laterally adjacent to each other configured, multi-layered structure possible. So can

neighboring areas have different properties

have, for example, form differently oriented spots.

The invention is not limited to those specified

Embodiments limited. For example, the organic light-emitting component 1, in particular the organic functional layer structure 22, may be segmented. Alternatively or additionally, a plurality of organic light-emitting components 1 next to each other to an organic light-emitting

Assembly can be arranged.

Claims

claims

An organic light emitting device (1) comprising a first electrode (20), an organic functional layer structure (22) over the first electrode (20) and

a second electrode (23) over the organic

functional layered structure (22), wherein

the organic functional layer structure (22) in the emission direction at least one light-influencing

Layer structure (2) is arranged downstream, the plurality of recesses in the light-influencing

Layer structure (2) formed light channels (3), each having a high aspect ratio, wherein the

Aspect ratio in each case the ratio of a length (L) of the light channels (3) to a width (B) of the light channels (3) and wherein the high aspect ratio in a range between 100000 to 1 and 1000 to LL.

2. The organic light emitting device according to claim 1, wherein the high aspect ratio is in a range between

10000 to 1 and 5000 to 1 lies.

3. Organic light-emitting component according to one of the preceding claims, in which the light channels (3)

are tubular.

4. Organic light-emitting component (1) according to one of the preceding claims, wherein

the length (L) of the microstructure (3) is in each case in a range between 100 μm and 5 mm, for example between 100 μm and 3 mm, for example between 500 μm and 1.5 mm.

5. Organic light-emitting component (1) according to one of the preceding claims, wherein

the width (B) of the microstructure (3) is in each case in a range between 1 μm and 100 μm, for example between 1.5 μm and 50 μm, for example between 2 μm and 10 μm.

6. Organic light-emitting component (1) according to one of the preceding claims, wherein

the microstructures (3) change a radiation characteristic of the organic functional layer structure (22).

7. Organic light-emitting component (1) according to

Claim 6, wherein

the microstructures (3) change the emission characteristic such that at least one spot is generated.

8. Organic light-emitting component {1) according to one of the preceding claims, wherein

at least in regions, laterally adjacent, differently formed microstructures (3) are arranged in the light-influencing layer structure (2).

9. Organic light-emitting component (1) according to one of the preceding claims, wherein

the light-influencing layer structure (2)

Carrier (12) or a cover body (38) of the organic light emitting device (1).

10. Organic light-emitting component (1) according to one of claims 1 to 8, wherein

the light-influencing layer structure (2) is arranged on a carrier (12) or a cover body (38) of the organic light-emitting component.

11. Organic light-emitting component (1) according to one of the preceding claims, wherein

the microstructures (3) at least partially a

Have coating (4) and / or a filler that at least partially and / or completely in the

Microstructures (3) is introduced.

12. A method for producing a light-influencing layer structure (2), the organic functional Layer structure (22) is arranged downstream in the emission direction, wherein

in the light-influencing layer structure (2) by means of a laser pulse method, a plurality of

Recesses is formed which form light channels (3), wherein the light channels (3) each have a high aspect ratio,

wherein the aspect ratio is the ratio of a length (L) of the light channels (3) to a width (B) of the light channels (3) and wherein the high aspect ratio is in a range between 100,000 to 1 and 1,000.

13. The method of claim 12, wherein

the laser pulse method is carried out with a pulse frequency in a range between 1 pulse per second to 3000 pulses per second.