CN1527648A - Organic electroluminescent device - Google Patents

Abstract

The present invention discloses an organic electroluminescent device with a structure for solving the problem of the reduction of the external quantum efficiency of an organic electroluminescent component due to surface plasmon resonance in the organic electroluminescent component. The organic electroluminescent device has a nano-structure organic electroluminescent light extraction layer composed of dielectric material and nano-sized metal particles or composed of organic material and nano-sized metal particles, the nano-structure film layer can form co-coupling with surface plasmon resonance in the component, light trapped in the component is extracted out of the component again, and the luminous efficiency of the organic electroluminescent component is effectively improved.

Description

Organic Electroluminescent Devices

technical field

The present invention relates to an organic electroluminescent device and its manufacturing method, in particular to an organic electroluminescent device with a structure that solves the problem of reducing the external quantum efficiency of the organic electroluminescent device due to surface plasmon resonance in the organic electroluminescent device. Light device.

Background technique

Organic electroluminescent devices (also known as organic light emitting diode (OLED) displays) emit light based on organic molecular materials (which can be divided into small molecule materials according to molecular weight) And polymer material (polymer material)) apply an external electric field to make it produce luminescence. Organic electroluminescent devices (organic electroluminescent devices) are self-illuminating (self emission) components, and can be arrayed (dot matrix type display), with light and thin, high contrast, low power consumption, high resolution, and short response time (fast response time), no need for backlight and wide viewing angle, etc., and its panel size can be from 4mm microdisplay to 100mm large outdoor signage display, it is regarded as the next generation of flat panel display (FPD) . In addition to the application of the display, because the organic electroluminescence component can form an array structure on a thin and flexible material, it has a wider range of applications, and is especially suitable for lighting. It is generally estimated that if the luminous efficiency of organic electroluminescent components can be increased to more than 100Lm/W, organic electroluminescent display devices will have the opportunity to replace general lighting sources. Therefore, the improvement of efficiency is imperative for the development of organic electroluminescent components. important topic.

The principle of organic electroluminescence is that electrons are injected through the cathode and holes are injected through the anode, and the potential difference derived from the external electric field causes these electrons and holes to move and meet in the thin film layer, and recombination occurs. The energy emitted by the repeated combination excites the light-emitting layer molecules to be in a high-energy and unstable excited state, and returns to a low-energy and stable ground state when the energy is released. The luminous efficiency of an organic electroluminescence device is determined by its internal quantum efficiency (internal quantum efficiency) and external quantum efficiency (external quantum efficiency). Internal quantum efficiency (internal quantum efficiency) is the internal efficiency of the process of converting electricity into light in physical phenomena. After the organic molecule is excited, 1/4 of the excited electrons (exciting electrons) will form an asymmetric spin group. state (asymmetric spin configuration) in the form of a singlet (singlet), and release energy in the form of fluorescence (fluorescence), but 3/4 of the excited electrons (exciting electrons) will form a symmetric spin configuration (symmetric spin configuration) ) in the triplet state (triplet), and release energy in the form of non-radioactive phosphorescence (phosphorescence). However, it has been confirmed that organometallic compounds can release energy from triplets of exciting electrons in the form of phosphorescence. Therefore, the internal quantum efficiency of organic electroluminescent devices depends on In its luminescent excitation mechanism (excitation mechanism), it depends on the choice of using fluorescent (fluorescence) light-emitting materials or phosphorescent (fluorescence) light-emitting materials.

The external quantum efficiency (external quantum efficiency) of an organic electroluminescent device is defined as the ratio of the input electrical energy in the component to the generated luminous energy, that is, the energy generated by the organic electroluminescent device or photon count. Taking a typical organic electroluminescent component as an example, not all the light emitted by the organic layer can be transmitted to the outside of the component. About 40% of the light in the organic electroluminescent component will be lost due to the formation of surface plasmon resonance inside the component. . In addition, because the refractive index of organic materials and glass substrates is higher than that of air, part of the light is prone to total reflection and is confined in the component and even scattered on both sides of the component. It is estimated that a total of about 80% of the light will be confined in the component. Therefore, the external electronic efficiency of a general organic electroluminescent component is less than 20%. Therefore, if the light trapped in the component can be extracted out of the component again, the luminous efficiency of the organic electroluminescent component can be greatly and effectively improved.

Contents of the invention

In view of this, the object of the present invention is to provide an organic electroluminescent device, which has a nanostructure organic electroluminescent light recovery layer (organic electroluminescent light recovery layer) composed of dielectric materials and metal particles with nanometer dimensions. , this nanostructured film layer can form a resonant coupling with the surface plasmon resonance in the component, and recover the light trapped in the component outside the component, so as to solve the problem of surface plasmon resonance in the organic electroluminescence component ( surface plasmon resonance) to reduce the external quantum efficiency (external quantum efficiency) of the organic electroluminescent component, and increase the luminous efficiency of the organic electroluminescent component.

In order to achieve the above object of the present invention, the present invention provides an organic electroluminescent display structure, which has one or more layers of dielectric materials and metal particles with nanometer dimensions or organic materials and metal particles with nanometer dimensions. Nanostructured organic electroluminescence light extraction layer (organic electroluminescent light recovery layer) composed of particles.

The organic electroluminescence device having a nanostructured organic electroluminescent light extraction layer according to the present invention at least includes a substrate; a first electrode disposed on the substrate; an organic light emitting layer disposed on the first electrode ; a second electrode, disposed on the organic light-emitting layer, and the organic light-emitting layer is located between the first electrode and the second electrode; and a nanostructured organic electroluminescent light extraction layer. The organic electroluminescent light extraction layer of the nanostructure can be arranged on the substrate, that is, between the substrate and the first electrode; the organic electroluminescent light extraction layer of the nanostructure can also be arranged on the first electrode. On the electrode, and the organic electroluminescence light extraction layer of the nanostructure is located between the first electrode and the organic light emitting layer; the organic electroluminescent light extraction layer of the nanostructure can also be arranged on the organic light emission layer, and The organic electroluminescence light extraction layer of the nanostructure is located between the organic light emitting layer and the second electrode; and the organic electroluminescence light extraction layer of the nanostructure can also be arranged on the second electrode.

The organic electroluminescence device having a nanostructured organic electroluminescent light extraction layer according to the present invention may also include a substrate, a first electrode, an organic light-emitting layer, a second electrode, and a first nanostructured organic electroluminescence device. An electromechanical excitation light extraction layer and a second nanostructured organic electroluminescence light extraction layer. The organic electroluminescence light extraction layer of the above-mentioned first nanostructure can be formed between the above-mentioned substrate and the above-mentioned first electrode, and can also be formed between the above-mentioned first electrode and the organic light-emitting layer; and the organic electroluminescent layer of the above-mentioned second nanostructure The excitation light extraction layer may be formed between the second electrode and the organic light emitting layer or may be formed on the second electrode.

The organic electroluminescent device having a nanostructured organic electroluminescent light extraction layer according to the present invention can be an organic electroluminescent device that emits light from the substrate side, top emitting (i.e., the second electrode side) or a double-sided emitting device. Electromechanical Luminescence Devices.

The present invention is characterized by an organic electroluminescence device having a nanostructured organic electroluminescent light extraction layer, and the nanostructured organic electroluminescent light extraction layer is made of a dielectric material and a metal particle or an organic material with a nanometer size and Composed of nano-sized metal particles. Wherein the above-mentioned dielectric material or organic material and the metal particles with nanometer size that constitute the organic electroluminescent light extraction layer of the nanometer structure are formed simultaneously in the same or different ways, and the above-mentioned metal particles with nanometer size are formed as dopants ( dopant) in the form of doping (doping) in dielectric materials or organic materials. The above-mentioned dielectric material constituting the organic electroluminescence light extraction layer of the nanostructure can be selected from the group consisting of insulating silicides, oxides, carbides, nitrides and combinations thereof, and can be silicon oxide (SiOx) , aluminum oxide (AlOx), magnesium oxide (MgO), silicon nitride (SiNx), aluminum nitride (AlNx) or magnesium fluoride (MgFx). The above-mentioned organic materials constituting the nanostructured organic electroluminescent light extraction layer can be selected from small molecular or high molecular organic materials. The nano-sized metal particles of the above-mentioned organic electroluminescent light extraction layer constituting the nanostructure are selected from the group consisting of gold, silver, germanium, selenium, tin, antimony, tellurium, gallium, and combinations thereof, or are composed of Composed of two or more of the above elements.

The substrate of the present invention may be a transparent or opaque glass or plastic substrate. The plastic substrate applicable to the present invention can be polyethylene terephthalate (polyethyleneterephthalate), polyester (polyester), polycarbonate (polycarbonates), polyammonium (Polyimide), heat-resistant transparent resin (Arton), polyacrylate (polyacrylates) or polystyrene (polystyrene) and so on.

According to the organic electroluminescence device of the present invention, the material of the above-mentioned organic light-emitting layer includes small-molecule organic light-emitting materials and polymer organic light-emitting materials. The above-mentioned organic luminescent layer can be composed of a single layer of organic luminescent material or a stack of multiple layers of organic luminescent material. The above-mentioned organic light-emitting layer can also be a fluorescence light-emitting material or a fluorescence light-emitting material.

The first electrode and the second electrode described in the present invention can be transparent electrodes, metal electrodes or composite electrodes. The above-mentioned transparent electrode can be indium tin oxide (ITO), indium zinc oxide (IZO), zinc aluminum oxide (AZO) or zinc oxide (ZnO). The above metal electrodes can be selected from the group consisting of lithium, magnesium, calcium, aluminum, silver, indium, gold, nickel and platinum, or an alloy composed of two or more of the above elements. Wherein the above-mentioned composite electrode is composed of multiple layers of electrodes, which can be selected from lithium, magnesium, calcium, aluminum, silver, indium, gold, nickel, platinum, indium tin oxide (ITO), indium zinc oxide (IZO ), zinc aluminum oxide (AZO) and zinc oxide (ZnO) in the group.

According to the organic electroluminescence device of the present invention, the nanostructure organic electroluminescent light recovery layer (organic electroluminescent light recovery layer) composed of nanometer-sized metal particles forms a resonant coupling with the surface plasmon resonance in the component, and the Light trapped in the component is recovered outside the component. In the production of the original, it is only necessary to coat a nanostructured organic electroluminescent light recovery layer (organic electroluminescent light recovery layer) in the structure of the component. Through this simple production process, the organic electroluminescent light can be effectively improved. Luminous efficiency of the component.

In order to make the above-mentioned and other objects, features, and advantages of the present invention more obvious and understandable, the preferred embodiments are specifically cited below, together with the accompanying drawings, and are described in detail as follows:

Description of drawings

1 is a cross-sectional view of an organic electroluminescent device according to Embodiment 1 of the organic electroluminescent device of the present invention.

2 is a cross-sectional view of an organic electroluminescent device according to Embodiment 2 of the organic electroluminescent device of the present invention.

3 is a cross-sectional view of an organic electroluminescent device according to Embodiment 3 of the organic electroluminescent device of the present invention.

4 is a cross-sectional view of an organic electroluminescent device according to Embodiment 4 of the organic electroluminescent device of the present invention.

5 is a cross-sectional view of an organic electroluminescent device according to Embodiment 5 of the organic electroluminescent device of the present invention.

Wherein, the reference signs are explained as follows:

10, 20, 30, 40, 50 ~ organic electroluminescent devices;

110, 210, 310, 410, 510～substrate;

120, 220, 320, 420~nanostructured organic electroluminescent light extraction layer;

121, 221, 321, 421, 521, 561～dielectric materials (organic materials);

122, 222, 322, 422, 522, 562 - metal particles with nanometer size;

130, 230, 330, 430, 530～the first electrode;

140, 240, 340, 440, 540 ~ organic light-emitting layer;

150, 250, 350, 450, 550 ~ the second electrode;

520～the first nanostructured organic electroluminescence light extraction layer; and

560 - the second nanostructure organic electroluminescence light extraction layer.

Detailed ways

Please refer to the sectional views of the organic electroluminescent device in FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 and FIG. 5 below to describe the present invention in detail.

The organic electroluminescent device of the present invention at least includes a substrate, a first electrode, an organic light-emitting layer, a second electrode, and a nanostructured organic electroluminescent light extraction layer, and the nanostructured organic electroluminescent The light extraction layer can be formed between the above-mentioned substrate and the above-mentioned first electrode (as shown in embodiment 1), can be formed between the above-mentioned first electrode and the organic light-emitting layer (as shown in embodiment 2), can be formed on the above-mentioned Between the second electrode and the organic light-emitting layer (as shown in embodiment 3) or on the second electrode (as shown in embodiment 4).

Example 1

First, a substrate 110 is provided, please refer to FIG. 1 . The substrate 110 can be a transparent substrate or an opaque substrate, and is made of glass or plastic material (bendable substrate). On this substrate 110, a nanostructure organic electroluminescence light extraction layer 120 composed of a dielectric material or an organic material 121 and a nano-scale metal particle 122 is formed, and the above-mentioned nanostructure The dielectric material or organic material 121 of the organic electroluminescence light extraction layer and the metal particles 122 with nanometer size are formed simultaneously in the same or different ways, and the metal particles 122 with nanometer size are doped in the form of dopant Doping in the dielectric material or organic material 121 . The dielectric material of the above-mentioned organic electroluminescent light extraction layer that constitutes the nanostructure is silicon oxide (SiOx), aluminum oxide (AlOx), magnesium oxide (MgO), silicon nitride (SiNx), aluminum nitride (AlNx) or It is magnesium fluoride (MgFx), and the above-mentioned dielectric material can be formed by sputtering or plasma-enhanced chemical vapor deposition. The above-mentioned organic material constituting the organic electroluminescent light extraction layer of the nanostructure is a small molecule or a polymer organic material, and the method of forming the above organic material can be thermal evaporation, spin coating, inkjet or screen printing etc. formed. The nanometer-sized metal particles constituting the organic electroluminescent light extraction layer of the nanostructure above can be gold, silver, germanium, selenium, tin, antimony, tellurium, gallium, and combinations thereof, or be composed of two or more of the above elements. composition. The above metal particles can be formed by sputtering, electron beam evaporation, thermal evaporation, chemical vapor deposition or spin coating, inkjet or screen printing. The proportion of nano-sized metal particles doped in the dielectric material or organic material can be 0.001% to 70% (weight percentage) of the composition of this layer, and the proportion is formed by using different deposition rates (power) to form the dielectric material and nanometer It can be prepared by using different size metal particles, or using different mixing ratios to form organic materials and nano-sized metal particles. Next, the first electrode 130 is formed on the nanostructured organic electroluminescence light extraction layer 120 , so that the organic electroluminescence light extraction layer 120 is located between the first electrode 130 and the substrate 110 . The first electrode 130 can be a transparent electrode, a metal electrode or a composite electrode. An organic light emitting layer 140 is formed on the first electrode 130. The organic light emitting layer 140 can be a small molecule or polymer organic light emitting material. If it is a small molecule organic light emitting material, an organic light emitting diode material layer can be formed by vacuum evaporation; if If it is a polymer organic light-emitting material, the organic light-emitting diode material layer can be formed by spin coating, inkjet or screen printing. Finally, a second electrode 150 is formed on the organic light emitting layer 140, and the second electrode 150 can be a transparent electrode, a metal electrode or a composite electrode. The method for forming the first electrode 130 and the second electrode 150 may be sputtering, electron beam evaporation, thermal evaporation, chemical vapor deposition or spray pyrolysis. The organic electroluminescent device 10 formed in this embodiment can be an organic electroluminescent device that emits light from the substrate side, top emitting (ie, the second electrode side), or a double-side emitting organic electroluminescent device.

Example 2

First, a substrate 210 is provided, please refer to FIG. 2 . The substrate 210 can be a transparent substrate or an opaque substrate, and is made of glass or plastic material (flexible substrate). A first electrode 230 is formed on the substrate 210, and the first electrode 230 can be a transparent electrode, a metal electrode or a composite electrode. Next, a nanostructured organic electroluminescent light extraction layer 220 composed of a dielectric material or an organic material 221 and a nano-scale metal particle 222 is formed on the first electrode 230, and the above-mentioned The dielectric material or organic material 221 and the metal particles 222 with nanometer size that constitute the nanostructured organic electroluminescent light extraction layer 220 are formed simultaneously in the same or different ways, and the above-mentioned metal particles 222 with nanometer size are formed as dopants ( dopant) in the form of doping (doping) in the dielectric material 221 . The dielectric material of the above-mentioned organic electroluminescent light extraction layer that constitutes the nanostructure is silicon oxide (SiOx), aluminum oxide (AlOx), magnesium oxide (MgO), silicon nitride (SiNx), aluminum nitride (AlNx) or It is magnesium fluoride (MgFx). The above-mentioned organic material constituting the organic electroluminescent light extraction layer of the nanostructure is a small molecule or a polymer organic material, and the method of forming the above organic material can be thermal evaporation, spin coating, inkjet or screen printing etc. formed. The nanometer-sized metal particles constituting the organic electroluminescent light extraction layer of the nanostructure above can be gold, silver, germanium, selenium, tin, antimony, tellurium, gallium, and combinations thereof, or be composed of two or more of the above elements. composition. The proportion of nano-sized metal particles doped in the dielectric material or organic material can be 0.001% to 70% (weight percentage) of the composition of this layer, and the proportion is formed by using different deposition rates (power) to form the dielectric material and nanometer Size metal particles to deploy. Next, an organic light emitting layer 240 is formed on the nanostructured organic electroluminescent light extraction layer 220 , so that the organic electroluminescent light extraction layer 220 is located between the organic light emitting layer 240 and the first electrode 230 . The organic light emitting layer 240 can be a small molecule or polymer organic light emitting material. Finally, a second electrode 250 is formed on the organic light emitting layer 240, and the second electrode 250 can be a transparent electrode, a metal electrode or a composite electrode. The organic electroluminescent device 20 formed in this embodiment can be an organic electroluminescent device that emits light from the substrate side, top emitting (that is, emits light from the second electrode side), or a double-side emitting organic electroluminescent device. The way to form each layer is as shown in Example 1.

Example 3

First, a substrate 310 is provided, please refer to FIG. 3 . The substrate 310 can be a transparent substrate or an opaque substrate, and is made of glass or plastic material (flexible substrate). A first electrode 330 is formed on the substrate 310, and the first electrode 330 can be a transparent electrode, a metal electrode or a composite electrode. Next, an organic light-emitting layer 340 is formed on the first electrode 330, and the organic light-emitting layer 340 can be a small molecule or polymer organic light-emitting material. Next, a nanostructured organic electroluminescence light extraction layer 320 composed of a dielectric material or an organic material 321 and metal particles 322 with a nano-scale (nano-scale) is formed on the organic light-emitting layer 340, and the above-mentioned composition The dielectric material 321 of the nanostructured organic electroluminescent light extraction layer and the metal particles 322 with nanometer size are formed at the same time in the same or different ways, and the metal particles 322 with nanometer size are doped in the form of dopant (doping) in the dielectric material or organic material 321 . The dielectric material of the above-mentioned organic electroluminescent light extraction layer that constitutes the nanostructure is silicon oxide (SiOx), aluminum oxide (AlOx), magnesium oxide (MgO), silicon nitride (SiNx), aluminum nitride (AlNx) or It is magnesium fluoride (MgFx). The above-mentioned organic material constituting the organic electroluminescent light extraction layer of the nanostructure is a small molecule or a polymer organic material, and the method of forming the above organic material can be thermal evaporation, spin coating, inkjet or screen printing etc. formed. The nanometer-sized metal particles constituting the organic electroluminescent light extraction layer of the nanostructure above can be gold, silver, germanium, selenium, tin, antimony, tellurium, gallium, and combinations thereof, or be composed of two or more of the above elements. composition. The proportion of nano-sized metal particles doped in the dielectric material or organic material can be 0.001% to 70% (weight percentage) of the composition of this layer, and the proportion is formed by using different deposition rates (power) to form the dielectric material or organic material. Materials and nano-sized metal particles to deploy. Next, the second electrode 350 is formed on the nanostructure organic electroluminescence light extraction layer 320 , so that the organic electroluminescence light extraction layer 320 is located between the organic light emitting layer 340 and the second electrode 350 . The second electrode 350 can be a transparent electrode, a metal electrode or a composite electrode. The organic electroluminescent device 30 formed in this embodiment can be an organic electroluminescent device that emits light from the substrate side, top emitting (that is, emits light from the second electrode side), or a double-side emitting organic electroluminescent device. The way to form each layer is as shown in Example 1.

Example 4

First, a substrate 410 is provided, please refer to FIG. 4 . The substrate 410 can be a transparent substrate or an opaque substrate, and is made of glass or plastic material (flexible substrate). A first electrode 430 is formed on the substrate 410, and the first electrode 430 can be a transparent electrode, a metal electrode or a composite electrode. Next, an organic light-emitting layer 440 is formed on the first electrode 430, and the organic light-emitting layer 440 can be a small molecule or polymer organic light-emitting material. Next, a second electrode 450 is formed on the organic light emitting layer 440, and the second electrode 450 can be a transparent electrode, a metal electrode or a composite electrode. Finally, a nanostructured organic electroluminescent light extraction layer 420 composed of dielectric materials or organic materials 421 and nano-scale metal particles 422 is formed on the second electrode 450, and the above-mentioned nanostructures The dielectric material or organic material 421 of the organic electroluminescence light extraction layer and the metal particles 422 with nanometer size are formed simultaneously in the same or different ways, and the metal particles 422 with nanometer size are doped in the form of dopant Doping in the dielectric material or organic material 421 . The dielectric material of the above-mentioned organic electroluminescent light extraction layer that constitutes the nanostructure is silicon oxide (SiOx), aluminum oxide (AlOx), magnesium oxide (MgO), silicon nitride (SiNx), aluminum nitride (AlNx) or It is magnesium fluoride (MgFx). The above-mentioned organic material constituting the organic electroluminescence light extraction layer of the nanostructure is a small molecule or a polymer organic material, and the method of forming the above organic material can be thermal evaporation, spin coating, inkjet or screen printing etc. formed. The nanometer-sized metal particles constituting the organic electroluminescent light extraction layer of the nanostructure above can be gold, silver, germanium, selenium, tin, antimony, tellurium, gallium, and combinations thereof, or be composed of two or more of the above elements. composition. The proportion of nano-sized metal particles doped in the dielectric material or organic material can be 0.001% to 70% (weight percentage) of the composition of this layer, and the proportion is formed by using different deposition rates (power) to form the dielectric material or organic material. Materials and nano-sized metal particles to deploy. The organic electroluminescent device 40 formed in this embodiment can be an organic electroluminescent device that emits light from the substrate side, top emitting (that is, emits light from the second electrode side), or a double-side emitting organic electroluminescent device. The way to form each layer is as shown in Example 1.

The organic electroluminescence device of the present invention may also include a substrate, a first electrode, an organic light-emitting layer, a second electrode, an organic electroluminescence light extraction layer of a first nanostructure, and a second nanostructure Organic electroluminescent light extraction layer. The organic electroluminescence light extraction layer of the above-mentioned first nanostructure can be formed between the above-mentioned substrate and the above-mentioned first electrode, and can also be formed between the above-mentioned first electrode and the organic light-emitting layer; and the organic electroluminescent layer of the above-mentioned second nanostructure The excitation light extraction layer may be formed between the second electrode and the organic light emitting layer or may be formed on the second electrode.

Example 5

Please refer to FIG. 5 , this embodiment is an organic electroluminescent device, which has a first nanostructured organic electroluminescent light extraction layer and a second nanostructured organic electroluminescent light extraction layer. First, a substrate 510 is provided. The substrate 510 can be a transparent substrate or an opaque substrate, and is made of glass or plastic material (flexible substrate). On this substrate 510, a first nanostructure organic electroluminescent light extraction layer 520 composed of dielectric material or organic material 521 and metal particles 522 with nano-scale is formed, and the above-mentioned first The dielectric material or organic material 521 of the nanostructured organic electroluminescent light extraction layer and the metal particles 522 with nanometer dimensions are formed simultaneously in the same or different ways, and the metal particles 522 with nanometer dimensions are formed as dopant Form doping in the dielectric material or organic material 521 . Next, a first electrode 530 is formed on the first nanostructured organic electroluminescent light extraction layer 520, and the first electrode 530 can be a transparent electrode, a metal electrode or a composite electrode. Then, an organic light-emitting layer 540 is formed on the first electrode 530, and the organic light-emitting layer 540 can be a small molecule or polymer organic light-emitting material. Next, a second electrode 550 is formed on the organic light emitting layer 540, and the second electrode 550 can be a transparent electrode, a metal electrode or a composite electrode. Finally, on the second electrode 550, a second nanostructured organic electroluminescence light extraction layer 560 composed of a dielectric material or an organic material 561 and a nano-scale metal particle 562 is formed, and the above-mentioned composition The dielectric material or organic material 561 of the organic electroluminescent light extraction layer of the nanostructure and the metal particle 562 with the nanometer size are formed simultaneously in the same or different ways, and the metal particle 562 with the nanometer size is formed as a dopant Form doping (doping) in the dielectric material or organic material 561 . The dielectric material of the organic electroluminescence light extraction layer that constitutes the first and second nanostructures is silicon oxide (SiOx), aluminum oxide (AlOx), magnesium oxide (MgO), silicon nitride (SiNx), nitride Aluminum (AlNx) or magnesium fluoride (MgFx). The above-mentioned organic material constituting the organic electroluminescence light extraction layer of the nanostructure is a small molecule or a polymer organic material, and the method of forming the above organic material can be thermal evaporation, spin coating, inkjet or screen printing etc. formed. The above-mentioned metal particles with nanometer size constituting the organic electroluminescent light extraction layer of the first and second nanostructures can be gold, silver, germanium, selenium, tin, antimony, tellurium, gallium and combinations thereof, or the combination of the above two composed of more than one element. The proportion of nano-sized metal particles doped in the dielectric material or organic material can be 0.001% to 70% (weight percentage) of the composition of this layer, and the proportion is formed by using different deposition rates (power) to form the dielectric material or organic material. Materials and nano-sized metal particles to deploy. The organic electroluminescent device 50 formed in this embodiment can be a substrate side emitting light, top emitting (ie emitting light from the second electrode side) or a double side emitting organic electroluminescent device. The way to form each layer is as shown in Example 1.

Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

Claims (33)

1. Organic Light-Emitting Device comprises at least:

One substrate;

One first electrode is disposed on the aforesaid substrate;

One organic luminous layer is disposed on above-mentioned first electrode;

One second electrode is disposed on the above-mentioned organic luminous layer, and above-mentioned organic luminous layer is positioned at above-mentioned

Between one electrode and above-mentioned second electrode; And

The organic electric-excitation luminescent light removing layer of one nanostructure.

2. Organic Light-Emitting Device as claimed in claim 1, wherein the organic electric-excitation luminescent light removing layer of above-mentioned nanostructure is disposed on the aforesaid substrate, and the organic electric-excitation luminescent light removing layer of above-mentioned nanostructure is between aforesaid substrate and above-mentioned first electrode.

3. Organic Light-Emitting Device as claimed in claim 1, wherein the organic electric-excitation luminescent light removing layer of above-mentioned nanostructure is disposed on above-mentioned first electrode, and the organic electric-excitation luminescent light removing layer of above-mentioned nanostructure is between above-mentioned first electrode and above-mentioned organic luminous layer.

4. Organic Light-Emitting Device as claimed in claim 1, wherein the organic electric-excitation luminescent light removing layer of above-mentioned nanostructure is disposed on the above-mentioned organic luminous layer, and the organic electric-excitation luminescent light removing layer of above-mentioned nanostructure is between above-mentioned organic luminous layer and above-mentioned second electrode.

5. Organic Light-Emitting Device as claimed in claim 1, wherein the organic electric-excitation luminescent light removing layer of above-mentioned nanostructure is disposed on above-mentioned second electrode.

6. Organic Light-Emitting Device as claimed in claim 1, wherein above-mentioned organic luminous layer is made of the individual layer luminous organic material.

7. Organic Light-Emitting Device as claimed in claim 1, wherein above-mentioned organic luminous layer constitutes by the plural layer luminous organic material is superimposed.

8. Organic Light-Emitting Device as claimed in claim 1, wherein above-mentioned organic luminous layer is a fluorescent) luminescent material or phosphorescent light-emitting materials.

9. Organic Light-Emitting Device as claimed in claim 1, wherein the material of above-mentioned organic luminous layer comprises the micromolecule luminous organic material.

10. Organic Light-Emitting Device as claimed in claim 9, wherein above-mentioned micromolecule luminous organic material utilizes the vacuum evaporation mode to form organic luminous layer.

11. Organic Light-Emitting Device as claimed in claim 1, wherein the material of above-mentioned organic luminous layer comprises the macromolecule luminous organic material.

12. Organic Light-Emitting Device as claimed in claim 11, the wherein above-mentioned macromolecule luminous organic material that comprises is to utilize rotary coating, ink-jet or screen painting mode to form organic luminous layer.

13. Organic Light-Emitting Device as claimed in claim 1, wherein aforesaid substrate is printing opacity or lighttight glass or plastic base.

14. Organic Light-Emitting Device as claimed in claim 13, wherein above-mentioned plastic base are polyethylene terephthaldehyde ester polyester, Merlon, polyene ammonium, heat-resisting transparent resin, polyacrylate or polystyrene.

15. Organic Light-Emitting Device as claimed in claim 1, wherein above-mentioned first electrode is transparency electrode, metal electrode or combination electrode.

16. Organic Light-Emitting Device as claimed in claim 1, wherein above-mentioned second electrode is transparency electrode, metal electrode or combination electrode.

17. as claim 15 or 16 described Organic Light-Emitting Device, wherein above-mentioned transparency electrode is indium tin oxide ITO, indium-zinc oxide IZO, Zinc-aluminium AZO or zinc oxide ZnO.

18. as claim 15 or 16 described Organic Light-Emitting Device, wherein above-mentioned metal electrode is selected from the group that is made up of lithium, magnesium, calcium, aluminium, silver, indium, gold, nickel and platinum, or the alloy of being made up of above-mentioned two or more element.

19. as claim 15 or 16 described Organic Light-Emitting Device, wherein above-mentioned combination electrode constitutes by the plural layer electrode is superimposed, is selected from the group that is made up of lithium, magnesium, calcium, aluminium, silver, indium, gold, nickel, platinum, indium tin oxide ITO, indium-zinc oxide IZO, Zinc-aluminium AZO and zinc oxide ZnO.

20. Organic Light-Emitting Device as claimed in claim 1, wherein the organic electric-excitation luminescent light removing layer of above-mentioned nanostructure is one to have the thin layer of nanostructure, and the thin layer of this nanostructure is made of dielectric material and metallic particles with nano-scale.

21. Organic Light-Emitting Device as claimed in claim 20, the dielectric material of the organic electric-excitation luminescent light removing layer of wherein above-mentioned formation nanostructure are selected from the group that silicide, oxide, carbide, nitride and the composition thereof of insulation form.

22. Organic Light-Emitting Device as claimed in claim 20, the dielectric material of the organic electric-excitation luminescent light removing layer of wherein above-mentioned formation nanostructure is silicon oxide sio x, aluminium oxide Al Ox, magnesium oxide MgO, silicon nitride SiNx, aluminium nitride AlNx or magnesium fluoride MgFx.

23. Organic Light-Emitting Device as claimed in claim 20, the nanometer sized metal particles that has of the organic electric-excitation luminescent light removing layer of wherein above-mentioned formation nanostructure is selected from the group that gold, silver, germanium, selenium, tin, antimony, tellurium, gallium and composition thereof form, or is made up of above-mentioned two or more element.

24. Organic Light-Emitting Device as claimed in claim 20, the dielectric material of the organic electric-excitation luminescent light removing layer of wherein above-mentioned formation nanostructure and to have nanometer sized metal particles be to form simultaneously in identical or different mode, and above-mentionedly have nanometer sized metal particles and mix (doping) in dielectric material with alloy (dopant) form.

25. Organic Light-Emitting Device as claimed in claim 1, wherein the organic electric-excitation luminescent light removing layer of above-mentioned nanostructure is one to have the thin layer of nanostructure, and the thin layer of this nanostructure is made of organic material and metallic particles with nano-scale.

26. Organic Light-Emitting Device as claimed in claim 25, the organic material of the organic electric-excitation luminescent light removing layer of wherein above-mentioned formation nanostructure are selected from the group that micromolecule or macromolecule organic material form.

27. Organic Light-Emitting Device as claimed in claim 25, the nanometer sized metal particles that has of the organic electric-excitation luminescent light removing layer of wherein above-mentioned formation nanostructure is selected from the group that gold, silver, germanium, selenium, tin, antimony, tellurium, gallium and composition thereof form, or is made up of above-mentioned two or more element.

28. Organic Light-Emitting Device as claimed in claim 25, the organic material of the organic electric-excitation luminescent light removing layer of wherein above-mentioned formation nanostructure and have nanometer sized metal particles and form simultaneously in identical or different mode, and above-mentioned have nanometer sized metal particles with the alloy form be doped in organic material in.

29. an Organic Light-Emitting Device comprises at least:

One substrate;

One first electrode is disposed on the aforesaid substrate;

One organic luminous layer is disposed on above-mentioned first electrode;

One second electrode is disposed on the above-mentioned organic luminous layer, and above-mentioned organic luminous layer is between above-mentioned first electrode and above-mentioned second electrode;

The first organic electric-excitation luminescent light removing layer of one nanostructure; And

The second organic electric-excitation luminescent light removing layer of one nanostructure.

30. Organic Light-Emitting Device as claimed in claim 29, the organic electric-excitation luminescent light removing layer of wherein above-mentioned first nanostructure is disposed on the aforesaid substrate, and the organic electric-excitation luminescent light removing layer of above-mentioned first nanostructure is between aforesaid substrate and above-mentioned first electrode.

31. Organic Light-Emitting Device as claimed in claim 29, the organic electric-excitation luminescent light removing layer of wherein above-mentioned first nanostructure is disposed on above-mentioned first electrode, and the organic electric-excitation luminescent light removing layer of above-mentioned first nanostructure is between above-mentioned first electrode and above-mentioned organic luminous layer.

32. Organic Light-Emitting Device as claimed in claim 29, the organic electric-excitation luminescent light removing layer of wherein above-mentioned second nanostructure is disposed on the above-mentioned organic luminous layer, and the organic electric-excitation luminescent light removing layer of above-mentioned second nanostructure is between above-mentioned organic luminous layer and above-mentioned second electrode.

33. Organic Light-Emitting Device as claimed in claim 29, the organic electric-excitation luminescent light removing layer of wherein above-mentioned second nanostructure is disposed on above-mentioned second electrode.