KR102018539B1 - Organic Light Emitting Display Device and fabricating of the same - Google Patents

Abstract

An organic light emitting display device according to an embodiment of the present invention comprises: a substrate on which at least three pixel regions are defined; A first electrode and a hole transport layer formed on the substrate; An emission layer formed on each of the pixel areas on the hole transport layer; And an electron transporting layer and a second electrode formed on the light emitting layer, wherein an optical auxiliary transporting layer is formed on the light emitting layer of the at least one pixel region, and the optical auxiliary transporting layer is formed of an electron transporting material. . Accordingly, a high resolution organic light emitting display device capable of resolving charge imbalance in the light emitting layer and improving lifespan characteristics while providing excellent light output efficiency can be provided.

Description

Organic Light Emitting Display Device and fabricating of the same}

The present invention relates to an organic light emitting display device and a manufacturing method thereof.

One of the new flat panel display devices, the organic light emitting display device is a self-luminous type, and has a superior viewing angle and contrast ratio compared to LCD, and it is possible to be thin and light because no backlight is required. Is also advantageous. In addition, it is possible to drive a DC low voltage, has a fast response speed, in particular, there is an advantage in terms of manufacturing cost.

The organic light emitting display device injects electrons and holes from the electron injection electrode (cathode) and the hole injection electrode (anode) into the light emitting layer, respectively, so that the excitons of the injected electrons and holes are separated from the excited state to the ground state. When it emits light. In this case, the organic light emitting display device has a top emission, a bottom emission, and a dual emission method according to a direction in which light is emitted, and a passive matrix type according to a driving method. ) And Active Matrix.

In detail, the organic light emitting display device includes a first electrode, a hole transporting layer, a red organic light emitting pattern, and a green layer formed in each of the red, green, and blue pixel regions P1, P2, and P3. A light emitting layer including an organic light emitting pattern and a blue organic light emitting pattern, and an electron transporting layer and a second electrode are formed.

In the organic light emitting display device having such a configuration, when voltage is applied to the first electrode and the second electrode, holes and electrons are moved to the light emitting layer through the hole transport layer and the electron transport layer, respectively, and combine with each other in the light emitting layer to emit light. At this time, since the wavelength of light is different for each pixel region, in order to adjust the desired color purity and intensity, it is necessary to adjust the optical distance. In general, the thickness of the hole transport layer is differently formed. The thickness control of the hole transport layer affects the mobility characteristics of the hole.

However, when the mobility mobility of the hole is deteriorated, charge imbalance of the light emitting layer is caused, and as a result, the light output efficiency and lifetime characteristics of the device are affected.

Accordingly, various methods for manufacturing an organic light emitting display device capable of improving light output efficiency and lifetime characteristics while considering the mobility characteristics of holes are required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problem, and an object thereof is to provide a high resolution organic light emitting display device capable of resolving charge imbalance in a light emitting layer and improving life characteristics while improving light output efficiency.

In accordance with an aspect of the present invention, an organic light emitting display device includes: a substrate having at least three pixel regions defined therein; A first electrode and a hole transport layer formed on the substrate; An emission layer formed on each of the pixel areas on the hole transport layer; And an electron transporting layer and a second electrode formed on the light emitting layer, wherein an optical auxiliary transporting layer is formed on the light emitting layer of the at least one pixel region, and the optical auxiliary transporting layer is formed of an electron transporting material. .

According to another aspect of the present invention, there is provided a method of manufacturing an organic light emitting display device, including: forming a first electrode on a front surface of a substrate on which at least three pixel regions are defined; Forming a hole transport layer on the first electrode; Forming a first optical auxiliary transport layer on the hole transport layer at a position corresponding to the first pixel region; Forming a first light emitting layer on the first optical auxiliary transport layer, and forming a second light emitting layer and a third light emitting layer on the hole transport layer at positions corresponding to the second and third pixel regions; Forming a second optical auxiliary transport layer on the second light emitting layer; Forming an electron transport layer on the first light emitting layer, the second optical auxiliary transport layer, and the third light emitting layer; And forming a second electrode on the electron transport layer.

According to still another aspect of the present invention, there is provided a method of manufacturing an organic light emitting display device, including: forming a first electrode on a front surface of a substrate on which at least three pixel regions are defined; Forming a hole transport layer on the first electrode; Forming a second optical auxiliary transport layer on the hole transport layer at a position corresponding to the second pixel region; Forming a first light emitting layer and a third light emitting layer on the hole transport layer at positions corresponding to the first and third pixel regions, and forming a second light emitting layer on the second optical auxiliary transport layer; Forming a first optical auxiliary transport layer on the first light emitting layer; Forming an electron transport layer on the first optical auxiliary transport layer, the second light emitting layer, and the third light emitting layer; And forming a second electrode on the electron transport layer.

According to still another aspect of the present invention, there is provided a method of manufacturing an organic light emitting display device, including: forming a first electrode on a front surface of a substrate on which at least three pixel regions are defined; Forming a hole transport layer on the first electrode; Forming first to third light emitting layers on the hole transport layer at positions corresponding to the first to third pixel areas; Forming a first optical auxiliary transport layer on the first light emitting layer at a position corresponding to the first pixel region; Forming a second optical auxiliary transport layer on the second light emitting layer at a position corresponding to the second pixel region; Forming an electron transporting layer on the first optical auxiliary transporting layer, the second optical auxiliary transporting layer and the third light emitting layer; And forming a second electrode on the electron transport layer.

According to the present invention, by forming an optical auxiliary transport layer that can control the optical distance between the light emitting layer and the electron transport layer it is possible to solve the optical control and the charge imbalance of the light emitting layer. In addition, there is an advantage that can improve the life characteristics while excellent light output efficiency.

Accordingly, the organic light emitting display device according to the present invention can realize high resolution.

1 is a cross-sectional view schematically showing an organic light emitting display device according to an embodiment of the present invention;
2 is a schematic cross-sectional view of a conventional organic light emitting display device;
3 is a view comparing life characteristics in Comparative Examples and Examples 1 to 3; And
4 to 7 are cross-sectional views schematically illustrating an organic light emitting display device according to another embodiment of the present invention.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. Like numbers refer to like elements throughout. In the following description, when it is determined that a detailed description of known contents or configurations related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a schematic cross-sectional view of an organic light emitting display device according to an embodiment of the present invention.

As shown in FIG. 1, an organic light emitting display device includes a first electrode 110 and a hole injection layer stacked on a substrate (not shown) in which pixel regions P1, P2, and P3 are defined. 120, a hole injection layer, a hole transporting layer (130, hole transporting layer), an optical auxiliary transport layer (132, 134), a light emitting layer consisting of a first light emitting layer 142, a second light emitting layer 144, a third light emitting layer (146) 140, an electron transporting layer 150, a second electrode 160, a cathode, and a capping layer 170.

A feature of the present invention is that an optical auxiliary transport layer located between the hole transport layer and the light emitting layer is positioned between the light emitting layer and the electron transport layer, and the optical auxiliary transport layer is formed of an electron transport material.

Although not shown in the drawings, the organic light emitting display device includes a gate wiring and a data wiring defining each pixel region P1, P2, and P3 by crossing each other on a substrate (not shown), and a power supply extending in parallel with any one of them. The wiring is located, and each of the pixel regions P1, P2, and P3 includes a switching thin film transistor connected to a gate wiring and a data wiring, and a driving thin film transistor connected to the switching thin film transistor. The driving thin film transistor is connected to the first electrode 110.

In an embodiment, the organic light emitting display device includes an organic layer between the first electrode 110 and the second electrode 160 facing the organic light emitting display device, and the organic layer includes a hole injection layer 120 and a hole transport layer 130. The first optical auxiliary transport layer 132, the second optical auxiliary transport layer 134, the first light emitting layer 142, the second light emitting layer 144, and the third light emitting layer 140 including the light emitting layer 146, the electron transport layer 150. It includes. The first emission layer 142 may be formed of a red organic material, the second emission layer 144 may be formed of a green organic material, and the third emission layer 146 may be formed of a blue organic material.

First, the first electrode 110 is formed in one plate shape on the red, green, and blue pixel areas P1, P2, and P3 on a substrate (not shown). The first electrode 110 is a reflective electrode, for example, a transparent conductive material layer having a high work function, such as indium-tin-oxide (ITO), and silver (Ag) or silver alloy (Ag). It may be a multilayer structure including a reflective material layer such as an alloy).

The hole injection layer 120 and the hole transport layer 130 are formed on the first electrode 110 at positions corresponding to all of the pixel regions P1, P2, and P3. The hole transport layer 130 may be referred to as a common layer, and the hole injection layer 120 may be omitted. The thickness of the hole injection layer 120 and the hole transport layer 130 may be about 100 ~ 1,200 Å, it may be adjusted in consideration of the hole injection characteristics and hole transport characteristics.

The hole transport layer 130 not only transports holes easily to the light emitting layer, but also serves to increase luminous efficiency by limiting electrons generated from the cathode to only the light emitting region of the light emitting layer. That is, the hole transport layer 130 serves to facilitate the transport of holes, NPD (N, N-dinaphthyl-N, N'-diphenyl benzidine), TPD (N, N'-bis- (3-methylphenyl) -N, N'-bis- (phenyl) -benzidine), TCTA (4- (9H-carbazol-9-yl) -N, N-bis [4- (9H-carbazol-9-yl) phenyl] -benzenamine ), CBP (4,4'- N, N'-dicarbazole-biphenyl), s-TAD or MTDATA (4,4 ', 4 "-Tris (N-3-methylphenyl-N-phenyl-amino) -triphenylamine) It may be formed as, but the spirit of the present invention is not limited thereto.

The optical auxiliary transport layer may include a first optical auxiliary transport layer 132 and a second optical auxiliary transport layer 134, and may further include a third optical auxiliary transport layer 136.

In this case, the optical auxiliary transport layer may be formed on the second emission layer 144 at a position corresponding to the green pixel region P2. That is, according to the present invention, at least one of the first to third optical auxiliary transport layers 132, 134, and 136 may be formed on the emission layer at a position corresponding to at least one pixel area. At this time, when the optical auxiliary transport layer is positioned between the light emitting layer and the electron transport layer according to each pixel area, the optical auxiliary transport layer is not positioned between the hole transport layer and the light emitting layer. That is, the optical auxiliary transport layer is changed from the hole transport role to the electron transport role, and at the same time, the optical distance control role is performed between the light emitting layer and the electron transport layer, not between the light emitting layer and the hole transport layer.

The first optical auxiliary transport layer 132 and the second optical auxiliary transport layer 134 may each have a thickness of about 100 to about 1100 mm 3. Here, the thickness of the second optical auxiliary transport layer 134 may be smaller than the thickness of the first optical auxiliary transport layer 132, but the spirit of the present invention is not limited thereto.

The first optical auxiliary transport layer 132 and the second optical auxiliary transport layer 134 may be formed of the same material as the electron transport layer. Specifically, it is preferable to include any one or more selected from Alq3 (tris (8-hydroxyquinolino) aluminum), PBD, TAZ, spiro-PBD, BAlq and SAlq. In addition, the same material as the host of the light emitting layer, anthracene derivative or oxadiazole derivative material may be formed using alone, or may be formed by mixing with LiQ.

In the emission layer 140, the first emission layer 142, the second emission layer 144, and the third emission layer 146 are formed at positions corresponding to the first to third pixel regions P1, P2, and P3. That is, the first emission layer 142 is formed at the position corresponding to the first pixel region P1, and the second emission layer 144 is formed at the position corresponding to the second pixel region P2, and the third pixel region is formed. The third light emitting layer 146 is formed at a position corresponding to P3. The thickness of the first light emitting layer 142, the second light emitting layer 144, and the third light emitting layer 146 may be about 100 to about 400 μm, but may be adjusted in consideration of light emission characteristics.

The emission layer 140 may be formed of a host and a dopant, and may include a material emitting red, green, blue, or white light, and may be formed using phosphorescent or fluorescent materials.

Here, when the light emitting layer emits red, it includes a host material containing CBP (carbazole biphenyl) or mCP (1,3-bis (carbazol-9-yl), PIQIr (acac) (bis (1-phenylisoquinoline) Phosphorescent material comprising a dopant comprising any one or more selected from acetylacetonate iridium, PQIr (acac) (bis (1-phenylquinoline) acetylacetonate iridium), PQIr (tris (1-phenylquinoline) iridium) and PtOEP (octaethylporphyrin platinum) Alternatively, it may alternatively be a fluorescent material including PBD: Eu (DBM) ₃ (Phen) or perylene, but is not limited thereto.

When the light emitting layer emits green, it may include a host material including CBP or mCP, and may be a phosphor including a dopant material including Ir (ppy) ₃ (fac tris (2-phenylpyridine) iridium). Alternatively, the fluorescent material may include Alq3 (tris (8-hydroxyquinolino) aluminum), but is not limited thereto.

When the light emitting layer emits blue, it may be a phosphor including a host material including CBP or mCP and including a dopant material including (4,6-F ₂ ppy) ₂ Irpic or L2BD111.

Alternatively, it may be a fluorescent material including any one selected from spiro-DPVBi, spiro-6P, distilbenzene (DSB), distriarylene (DSA), PFO-based polymer and PPV-based polymer, but is not limited thereto. .

Since the electron transport layer 150 is formed on the light emitting layer or the optical auxiliary transport layer at a position corresponding to all of the pixel areas P1, P2, and P3, the electron transport layer 150 may be referred to as a common layer. The electron transport layer 150 may have a thickness of about 200 to about 400 mm, but may be adjusted in consideration of electron transport characteristics. The electron transport layer 150 may serve as an electron transport and injection layer, but an electron injection layer may be formed on the electron transport layer 150 separately.

The electron transport layer 150 may include any one or more selected from Alq3 (tris (8-hydroxyquinolino) aluminum), PBD, TAZ, spiro-PBD, BAlq, and SAlq, but the spirit of the present invention is not limited thereto. . In addition, the electron transport layer 150 may be formed using an evaporation method or a spin coating method.

The second electrode 160 is formed on the electron transport layer 150. For example, the second electrode 160 is made of an alloy of magnesium and silver (Mg: Ag) to have transflective properties. That is, the light emitted from the light emitting layer is displayed to the outside through the second electrode 160. Since the second electrode 160 has a semi-transmissive property, some of the light is again directed to the first electrode 110. Is headed.

Accordingly, repetitive reflection occurs between the first electrode 110 and the second electrode 160 that act as a reflective electrode, which is called a microcavity effect. That is, light is repeatedly reflected in the cavity between the anode, which is the first electrode, and the cathode, which is the second electrode, thereby increasing the light efficiency.

In this case, since the wavelengths of the light emitted from the first light emitting layer 142, the second light emitting layer 144, and the third light emitting layer 146 are different, the distance between the first electrode 110 and the second electrode 160 may be increased. The thickness d of the cavity defined by the distance is changed. That is, the green pixel region P2 has a thickness d smaller than the red pixel region P1 emitting the red light having the longest wavelength and is smaller than the blue pixel region P3 emitting the blue light having the shortest wavelength. The thickness d is large.

Therefore, in the present invention, the distance between the first electrode 110 and the second electrode 160 is formed differently by adjusting the thickness of the optical auxiliary transport layer. That is, the thickness of the second optical auxiliary transport layer 134 formed at the position corresponding to the second pixel region P2 is greater than the thickness of the first optical auxiliary transport layer 132 formed at the position corresponding to the first pixel region P1. Form small.

The capping layer 170 serves to increase the light extraction effect and protect it from external moisture permeation and oxidation, and the capping layer 170 is a material forming the hole transport layer 130 and a material forming the electron transport layer 150. The red, green, and blue light emitting layers 142, 144, and 146 may be formed of any one of host materials, and the capping layer 170 may be omitted.

As such, the organic light emitting display device according to an embodiment of the present invention can realize a high quality image while maintaining light output efficiency and color characteristics.

Hereinafter, characteristics of the organic light emitting display device and the comparative example according to the embodiment of the present invention will be evaluated. However, Examples 1 to 3 below are merely illustrative of the present invention, and the present invention is not limited to Examples 1 to 3 below.

FIG. 2 is a cross-sectional view schematically illustrating a conventional organic light emitting display device as a comparative example, and FIG. 3 is a view comparing life characteristics of Comparative Examples and Examples 1 to 3. FIG.

As shown in FIG. 2, in the comparative example, a conventional organic electric field is formed between the first and second optical auxiliary transport layers 132 and 134 between the hole transport layer 130 and the first and second light emitting layers 142 and 144. It is a light emitting display device.

Specifically, the conventional organic light emitting display device has an anode, a hole injection layer (HATCN, 50 mV, a hole transport layer (NPD, 1100 mV), a first optical auxiliary transport layer (NPD, 400 mV, second optical) as a top emission method. Auxiliary transport layer (NPD, 850 Å, light emitting layer (red, green, blue light emitting material), electron transport layer (Alq3, 360 Å, cathode (Mg: Ag = 10: 1, 140 Å, and capping layer (NPD, 6500 Å) structure to be.

On the other hand, Embodiment 1 is an organic light emitting display device having the structure of FIG. 1, and the second optical auxiliary transport layer 134 is the second light emitting layer 144 and the electron transport layer 150 in the conventional organic light emitting display device, which is a comparative example. It is a structure located in between. In this case, the second optical auxiliary transport layer 134 used the same material as the electron transport material. In addition, Example 2 was formed in the same structure as in Example 1, but the second optical auxiliary transport layer 134 was used as the same material as the host of the light emitting layer. In addition, Example 3 was formed in the same structure as in Example 1, but the second optical auxiliary transport layer 134 was used as the oxadiazole derivative material.

Thus, as shown in Figure 3, compared to Comparative Examples Examples 1 to 3 it was confirmed that all the life characteristics (reference: 30mA / cm ² ) was improved.

4 to 7 are cross-sectional views schematically illustrating an organic light emitting display device according to another embodiment of the present invention.

FIG. 4 is a structure in which formation positions of the first optical auxiliary transport layer 132 and the second optical auxiliary transport layer 134 are changed in the organic light emitting display device having the structure of FIG. 1. That is, the first optical auxiliary transport layer 132 is formed on the first light emitting layer 142 at a position corresponding to the red pixel area P1, and the second optical auxiliary transport layer 134 is formed in the green pixel area P2. ) Is a structure formed on the hole transport layer 130 in a position corresponding to.

FIG. 5 illustrates a structure in which the formation position of the first optical auxiliary transport layer 132 is changed among the organic light emitting display devices formed in the structure of FIG. 1. That is, the first optical auxiliary transport layer 132 has a structure formed on the first light emitting layer 142 at a position corresponding to the red pixel region P1.

FIG. 6 illustrates a structure in which the positions of forming the first optical auxiliary transport layer 132 and the second optical auxiliary transport layer 134 of the organic light emitting display device having the structure of FIG. 1 are changed, and a third optical auxiliary transport layer 136 is added. It is a structure to form. That is, the first optical auxiliary transport layer 132 is formed on the hole transport layer 130 at a position corresponding to the red pixel region P1, and the second optical auxiliary transport layer 134 is formed in the green pixel region P2. It is a structure formed on the hole transport layer 130 in a position corresponding to. In addition, a third optical auxiliary transport layer 136 is formed on the third light emitting layer 146 at a position corresponding to the blue pixel region P3.

FIG. 7 illustrates a structure in which a third optical auxiliary transport layer 136 is additionally formed among the organic light emitting display device formed in the structure of FIG. 5. That is, the first optical auxiliary transport layer 132 is formed on the first light emitting layer 142 at a position corresponding to the red pixel area P1, and the second optical auxiliary transport layer 134 is formed in the green pixel area P2. ) Is a structure formed on the second light emitting layer 144 at a position corresponding to). In addition, a third optical auxiliary transport layer 136 is formed on the third light emitting layer 146 at a position corresponding to the blue pixel region P3.

Hereinafter, a method of manufacturing an organic light emitting display device (FIG. 1) according to an embodiment of the present invention will be described in detail.

First, after forming the first electrode 110 on the substrate in which the first to third pixel regions P1, P2, and P3 are defined, the hole injection layer 120 without the fine metal mask FMM in the first chamber is formed. ) And the hole transport layer 130. The hole injection layer 120 may be doped with a P-type dopant, for example, F4-TCNQ or TCAQ, to the first hole transport layer 130 material. The spirit of the present invention is not limited thereto.

[F4-TCNQ]

[TCAQ]

Subsequently, after the first optical auxiliary transport layer 132 is formed on the hole transport layer 130 at the position corresponding to the first pixel region P1 using the fine metal mask FMM, the first to third light emitting layers ( 142, 144, and 146.

Next, a second optical auxiliary transport layer 134 is formed on the second light emitting layer 144 using a fine metal mask FMM.

Finally, the electron transport layer 150, the second electrode 160, and the capping layer 170 are sequentially formed without a fine metal mask (FMM).

Meanwhile, in the present specification, an organic light emitting display device (OLED) of a top emission method is illustrated, but the spirit of the present invention is not limited thereto, and bottom-emission and dual-emission are provided. It can be applied to various types of organic light emitting display devices such as tandem type (Tandem).

Those skilled in the art to which the present invention pertains will understand that the above-described present invention can be implemented in other specific forms without changing the technical spirit or essential features.

Therefore, it is to be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

110: first electrode 120: hole injection layer
130: hole transport layer 132: first optical auxiliary transport layer
134: second optical auxiliary transport layer 142: first light emitting layer
144: second light emitting layer 146: third light emitting layer
150: electron transport layer 160: second electrode
170: capping layer (CPL)

Claims (21)

A substrate in which at least three pixel regions are defined;
A first electrode and a hole transport layer formed on the substrate;
A first emission layer formed on the hole transport layer at a position corresponding to a first pixel area;
A second light emitting layer formed on the hole transport layer at a position corresponding to a second pixel area;
A third light emitting layer formed on the hole transport layer at a position corresponding to a third pixel region;
An electron transport layer formed on the first to third light emitting layers
A first optical auxiliary transport layer formed between the first light emitting layer and the electron transport layer;
A second optical auxiliary transport layer formed between the second light emitting layer and the electron transport layer; And
A second electrode formed on the electron transport layer;
Each of the first optical auxiliary transport layer and the second optical auxiliary transport layer is made of a different material from the electron transport layer,
The thicknesses of the first light emitting layer and the second light emitting layer are different from each other,
The thicknesses of the first optical auxiliary transport layer and the second optical auxiliary transport layer are different from each other,
And the light emitting layer is in contact with the hole transport layer. delete The method of claim 1,
The first optical auxiliary transport layer and the second optical auxiliary transport layer,
An organic light emitting display device, characterized in that formed of the same material as the host of the light emitting layer. The method of claim 1,
The first optical auxiliary transport layer and the second optical auxiliary transport layer,
An organic light emitting display device comprising: a mixture of at least one of an oxadiazole derivative, an anthracene derivative or an oxadiazole derivative and an anthracene derivative with LiQ. The method of claim 1,
The first electrode,
An organic light emitting display device, characterized in that a reflective electrode containing silver alloy (Ag alloy). The method of claim 1,
The first electrode is a reflective electrode,
And the second electrode has a transflective property. The method of claim 1,
And a third optical auxiliary transport layer formed between the third light emitting layer and the electron transporting layer. The method of claim 1,
The hole transport layer is formed of a single layer, an organic light emitting display device. Forming a first electrode on a front surface of the substrate in which at least three pixel regions are defined;
Forming a hole transport layer on the first electrode;
Forming first to third light emitting layers on the hole transport layer at positions corresponding to the first to third pixel areas;
Forming a first optical auxiliary transport layer on the first light emitting layer at a position corresponding to the first pixel region;
Forming a second optical auxiliary transport layer on the second light emitting layer at a position corresponding to the second pixel region;
Forming an electron transporting layer on the first optical auxiliary transporting layer, the second optical auxiliary transporting layer and the third light emitting layer; And
Forming a second electrode on the electron transport layer;
Each of the first optical auxiliary transport layer and the second optical auxiliary transport layer is made of a different material from the electron transport layer,
The thickness of the first light emitting layer and the second light emitting layer is formed to be different from each other,
The thickness of the first optical auxiliary transport layer and the second optical auxiliary transport layer is formed to be different from each other, the manufacturing method of the organic light emitting display device. The method of claim 9,
Prior to forming the hole transport layer,
A method of manufacturing an organic light emitting display device, the method comprising: forming a hole injection layer on the first electrode. delete The method of claim 9,
Forming a third optical auxiliary transport layer on the third light emitting layer at a position corresponding to the third pixel region;
The third optical auxiliary transport layer has a thickness different from that of each of the first optical auxiliary transport layer and the first optical auxiliary transport layer. The method of claim 9,
The first electrode,
A method for manufacturing an organic light emitting display device, characterized in that it is formed of a reflective electrode containing silver alloy (Ag alloy). The method of claim 9,
The first electrode is a reflective electrode,
The second electrode has a transflective property, characterized in that the manufacturing method of the organic light emitting display device. The method of claim 9,
The first optical auxiliary transport layer,
Include the same material as the host of the light emitting layer, or
An oxadiazole derivative, an anthracene derivative or a mixture of at least one of an oxadiazole derivative and an anthracene derivative with LiQ, a method of manufacturing an organic light emitting display device. The method of claim 9,
The second optical auxiliary transport layer,
Include the same material as the host of the light emitting layer, or
An oxadiazole derivative, an anthracene derivative or a mixture of at least one of an oxadiazole derivative and an anthracene derivative with LiQ, a method of manufacturing an organic light emitting display device. The method of claim 12,
The third optical auxiliary transport layer,
Include the same material as the host of the light emitting layer, or
An oxadiazole derivative, an anthracene derivative or a mixture of at least one of an oxadiazole derivative and an anthracene derivative with LiQ, a method of manufacturing an organic light emitting display device. The method of claim 9,
The second light emitting layer is thicker than the first light emitting layer,
The first optical auxiliary transport layer is thicker than the second optical auxiliary transport layer , the method of manufacturing an organic light emitting display device. The method of claim 12,
The first light emitting layer is thicker than the third light emitting layer,
The second optical auxiliary transport layer is thicker than the third optical auxiliary transport layer , the method of manufacturing an organic light emitting display device. The method of claim 1,
The second light emitting layer is thicker than the first light emitting layer,
The first optical auxiliary transport layer is thicker than the second optical auxiliary transport layer , the organic light emitting display device. The method of claim 7, wherein
The first light emitting layer is thicker than the third light emitting layer,
The second optical auxiliary transport layer and the third optical auxiliary transport layer of organic light emitting display device, characterized in that larger than.

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