KR100591795B1 - Stacked organic light emitting device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacked organic light emitting device applied to a liquid crystal display device using a glass or a flexible film. The present invention relates to an organic light emitting device using a glass or flexible film substrate including a light emitting layer laminated with an organic film on a positive electrode and a negative electrode. The light emitting layer has a structure in which three light emitting layers of red, green, and blue are stacked, and an ITO transparent electrode including a semi-transmissive metal buffer layer is formed between each light emitting layer to be a positive electrode or a negative electrode, and the substrate on which the light emitting layer is formed. A transparent high refractive index diffusion layer is provided along the opposite side.

According to the present invention, when the backlight and the color filter are combined into an OLED, it is possible to manufacture an ultra-thin, and the power consumption can be minimized, compared to the existing backlight form, and because the surface light source can be a large and large display It has advantages

Description

Multilayer Organic Light-Emitting Element {STACKING ORGANIC LIGHT EMITTING DIODE}             

1 is a schematic cross-sectional view illustrating a structure of a liquid crystal display device of a light emitting method according to the prior art.
FIG. 2 is a cross-sectional view schematically illustrating a structure of a backlight unit of the direct emission type in FIG. 1. FIG.
FIG. 3 is a cross-sectional view schematically illustrating a structure of an edge-emitting backlight unit of FIG. 1.
4 is a schematic cross-sectional view illustrating a structure of a liquid crystal display device having a field sequential color method according to the related art.
5 is a view for comparing and comparing light emitting pixels of a light emitting method and light emitting pixels of a field sequential color method in a liquid crystal display according to the related art.
6A is a cross-sectional view illustrating a structure of a stacked organic light emitting diode according to a preferred embodiment of the present invention.
FIG. 6B is a cross-sectional view for describing a structure of the first light emitting part in FIG. 6A.
7 is a graph illustrating emission spectra of red, green, and blue organic light emitting diodes manufactured in the same structure as the first light emitting unit of FIG. 6B;
8 is a graph showing emission spectra of first, second and third light emitting units when a red organic light emitting diode is manufactured according to the present invention;
9 is a graph illustrating emission spectra of first, second and third light emitting units when a green organic light emitting diode is manufactured according to the present invention;
10 is a graph showing emission spectra of first, second and third light emitting units when a blue organic light emitting diode is manufactured according to the present invention;
11 is a graph showing the spectrum of each light emitting part of an organic light emitting device in which a green light emitting layer is laminated on a first light emitting part, a red light emitting layer is laminated on a second light emitting part, and a blue light emitting layer is laminated on a third light emitting part;
12 is a schematic diagram for explaining an electrode pattern formed on a substrate.
<Explanation of symbols for the main parts of the drawings>
600: substrate 610: first electrode
620: Surface-treated part of each electrode 630: First light emitting part
640: metal buffer layer 650: second electrode
660: second light emitting unit 670: third electrode
680: third light emitting unit 690: fourth electrode
691 protective film 692 diffusion layer
693: absorbent 694: glass can

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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacked organic light emitting device applied to a liquid crystal display device using glass or a flexible film, and more particularly, using a field sequential color method that sequentially emits red, green, and blue colors. The present invention relates to a stacked organic light emitting device capable of being used as a surface light source.
In general, a liquid crystal display (LCD) applies a voltage externally to a liquid crystal material contained between two glass substrates, and controls the amount of light transmitted through the substrate by adjusting the intensity of the voltage. It is a display apparatus using the electro-optical characteristics. The liquid crystal display is classified into a spatial mixed color, that is, a light emission method and a temporal mixed color, that is, a field sequential color method.
1 is a schematic cross-sectional view illustrating a structure of a liquid crystal display device of a light emitting method according to the prior art.
Referring to FIG. 1, the structure of the liquid crystal display 10 may be divided into a backlight unit 11, a liquid crystal 12, and a color filter 13. Since the liquid crystal 12 does not emit light by itself and merely controls the amount of light, the liquid crystal 12 uses a backlight unit 11 as a light source, and the backlight unit 11 emits light from the liquid crystal display 10. As well as a circle, it can be used also for surface light source devices, such as lighting and a signboard.
The backlight unit 11 may be classified into a direct light type and an edge light type according to the arrangement of the light sources.
FIG. 2 is a cross-sectional view schematically illustrating a structure of a direct emission type backlight unit, and FIG. 3 is a cross-sectional view schematically illustrating a structure of an edge emission type backlight unit.
Referring to FIG. 2, in the direct emission type backlight unit 20, several light sources 21 are disposed at regular intervals, and a reflector 22 disposed below the light source 21, and the reflector 22. It comprises a protective plate 23 provided in the lower portion of the, the diffusion plate 24 provided on the light source 21, and the prism plate 25 provided on the diffusion plate 24.
3, the edge-emitting backlight unit 30 includes a light source 31, a light guide plate 32 for guiding light from the light source 31, and a lower portion of the light guide plate 32. A reflecting plate 33 provided in the light guide plate, a diffusion plate 34 provided on the light guide plate 32, a prism plate 35 provided on the diffusion plate 34, and a light source outside the light source 31. It is configured to include a light source cover 36 to protect the.
As shown in FIG. 2 and FIG. 3, a cold cathode fluorescent lamp or the like is used as the light sources 21 and 31 of the backlight units 20 and 30, and the light sources 21 and 31 are line light sources instead of surface light sources. Therefore, in order to emit light uniformly, it has a complicated structure composed of various optical sheets such as the reflecting plates 22 and 33, the light guide plate 32, the diffusion plates 24 and 34, and the prism plates 25 and 35.
As a result, in the liquid crystal display, as shown in FIG. 1, the liquid crystal 12 is positioned to adjust the gray scale on the backlight unit 11 having the structure as described above, and also expresses color. The color filter 13 is placed again in order to.
In the liquid crystal display device of the conventional light emitting method as described above, the power consumption of the backlight unit portion accounts for 50 to 70% of the total power consumption, and the light emitted from the light emitting source passes through the optical sheet, the liquid crystal, and the color filter. There is a problem that about 90% is destroyed.
In addition, as the display is gradually enlarged, a plurality of light sources are required to increase the amount of light. Therefore, the power consumption of the backlight unit is increased, and in the case of a cold cathode fluorescent lamp, there is a problem in that the uniformity of luminance is sharply degraded when used for a long time. In the case of the liquid crystal display device using the backlight unit, it is difficult to make a large and medium size, and also by implementing a color through a color filter, the color reproduction ratio is only about 40%, and there is a problem that the viewing angle is limited.
4 is a schematic cross-sectional view for describing the structure of a liquid crystal display device having a field sequential color method according to the related art.
The field sequential color method is an improved temporal mixed color method to compensate for problems such as low color reproducibility and limited viewing angle of the conventional light emission method, and has a main feature of combining a backlight part and a color filter.
Referring to FIG. 4, the red LED 41, the green LED 42, and the blue LED 43 sequentially emit light at high speed to emit light, regardless of the order of the light emitting sources 40. 12) to control the gray scale (gray scale) to implement the color. In other words, the field sequential color light emitting device serves as a display by itself, and color reproducibility reaches about 87% because colors are implemented using red, green, and blue LEDs, not through color filters. There is.
In addition, the field sequential color method has an advantage that the resolution per area is 9 times higher than that of the conventional light emission method as shown in FIG. 5. Referring to FIG. 5, three dots of red 501, green 502, and blue 503 constitute one pixel in the light emission method, but one dot 511 is one in the field sequential color method. Constitutes a pixel.
However, the field sequential color method has advantages of excellent color reproduction and long life by using red, green, and blue LEDs, but still requires high power consumption and has difficulty in medium and large size. In addition, there is a problem that the color breaking phenomenon is severe because of the use of the LED, which causes severe fatigue to the eyes.

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The present invention has been made to solve the above problems, an object of the present invention is to provide a stacked organic light emitting device having a low power consumption and high luminance luminous efficiency in the form of a combination of a backlight and a color filter.
In addition, another object of the present invention is to reduce the power consumption of the backlight portion, and to minimize the amount of light that disappears through the liquid crystal, the color filter, the optical sheet and the like as a self-luminous type and surface light source with a field sequential color It is to provide a stacked organic light emitting device that can be used.

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In order to achieve the above object, the stacked organic light emitting device according to the present invention is an organic light emitting device using a glass or flexible film substrate including a light emitting layer laminated on the positive electrode and the negative electrode by an organic film, wherein the light emitting layer is red, green and A structure in which three blue light emitting layers are stacked, and an ITO transparent electrode including a transflective metal buffer layer is formed between the respective light emitting layers to be a positive electrode or a negative electrode, and a transparent high refractive index diffusion layer is formed along the opposite surface of the substrate on which the light emitting layer is formed. It is characterized in that the provided.

In addition, the light emitting layer is a blue light emitting layer as a top layer in order to increase the surface light efficiency of the red, green, blue tricolor light, the red, green light emitting layer is characterized in that the stacking in any order.

In addition, the epoxy applied to form the diffusion layer is formed using any one of the method of the mold method, doctor blade, spray, screen printing, spin coating and inkjet printing, the thickness of the final coating layer after firing is 1 It is characterized by being in the range of 1 to 1 mm.

In addition, the diffusion layer is formed by applying a film-like diffusion sheet on the substrate, or using a transparent epoxy resin or the like.

In addition, the diffusion layer is formed by adding a powder composed of SiO ₂ component to the epoxy resin to ensure the optical uniformity of the light.

In addition, the organic light emitting device is characterized in that by first forming a diffusion layer by a large-area substrate, and then cutting the substrate for compatibility with organic deposition equipment.

In addition, in order to increase the light efficiency of the light transmitted during the fabrication of the organic light emitting device and to simplify the process, manufacturing of the organic light emitting device is advanced, and the diffusion layer is fabricated later.

In addition, the organic light emitting device is characterized by photo-patterning the lowest transparent or opaque electrode in a uniform shape in order to improve the life and production yield.

In addition, the electrode formed at the interface of the light emitting layer is a ions of the sputter target of the electrode in a reaction chamber provided with a grid film for controlling oxygen ions and a sputter target of the electrode by varying and applying a voltage of 0-100V. Oxygen ions are formed by plasma excitation.

In addition, the organic light emitting device is characterized in that the surface of the ITO transparent electrode including a semi-transmissive metal buffer layer formed at the interface of the light emitting layer to adjust the work function in the vacuum state by oxygen RF / UV plasma.

In addition, the transparent electrode formed between the light emitting layer is manufactured by any one of the method of RF sputter, grid RF sputter, DC sputter, DC pulse sputter, atomic layer deposition (ALD) and plasma enhanced atomic layer deposition (PEALD). It is characterized by.

In addition, the ITO transparent electrode formed between the light emitting layers is formed of an ultra-thin metal by laminating any one of LiF / Al / Ag, Ca / Ag and Ag / Ca in order to minimize the damage of the organic thin film when forming the The surface is treated with an oxygen RF / UV plasma in a vacuum state, alloyed to increase adhesion to the organic light emitting film, and the total thickness of the metal buffer layer is 1-20 nm.

The light emitting layer may further include a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer, and three light emitting layers may be configured between the hole transport layer and the electron transport layer, respectively.

In addition, the transparent substrate for the organic light emitting device is characterized in that using any one material of glass, plastic, PET, PES, PC, and a thin silicon wafer (flexible Si) having a property that can be bent.

In addition, the organic light emitting device further includes any one of an organic thin film stack, an inorganic thin film stack, an organic / inorganic mixed thin film stack, a stainless steel (SUS) can, and a glass can to prevent penetration of moisture and oxygen during manufacturing. It features.

Hereinafter, exemplary embodiments of a stacked organic light emitting diode according to the present invention will be described in detail with reference to the accompanying drawings.

6A is a cross-sectional view illustrating a structure of a stacked organic light emitting diode according to an embodiment of the present invention, and FIG. 6B is a cross-sectional view illustrating a structure of a first light emitting portion in FIG. 6A.

Referring to FIG. 6A, a first electrode 610 made of an ITO thin film is formed on the transparent substrate 600. The first electrode 610 is formed to a predetermined film thickness by a general sputtering method, and the formed film is formed in a predetermined pattern by etching or in a predetermined pattern by using a photoresist (PR). Thereafter, plasma is treated with oxygen, nitrogen, argon ions or the like for a predetermined time at atmospheric pressure or in vacuum with respect to the surface of the first electrode to adjust the work function.

Subsequently, a first light emitting part 630 is formed on the substrate on which the first electrode 610 is formed. In this case, the structure of the first light emitting unit 630 will be described with reference to FIG. 6B. On the substrate on which the first electrode 610 is formed, a hole injection layer 631 of 100 Å made of an organic film such as CuPC, MTDATA, etc. ), A 500 kV hole transport layer 632 made of an organic film such as NPB or TPD, a 300 KV green light emitting layer 633 made of Alq ₃ or Alq ₃ : C545T (0.5%), or Alq ₃ The 300 Å electron transport layer 634 and the 5 Å electron injection layer 635 made of LiF and BCP: Cs are successively deposited by vacuum thermal evaporation to form the first light emitting part 630.

Subsequently, in order to minimize the damage of the organic thin film formed in the step of forming the transparent electrode formed on the interface of the first light emitting part 630, a semi-transmissive metal buffer layer 640 composed of Al 20 손상 and Ag 100Å is inserted.

Subsequently, a grid film formed in a mesh shape capable of varying and applying a voltage of 0-100V and a sputter target of ITO are provided, and an oxygen ion implantation port is provided on the grid film, and an argon ion implantation port is provided below the grid film. The substrate in which the first light emitting part 630 is formed is placed in a reaction chamber in which is formed to excite ions in the reaction chamber in a plasma state to form a transparent ITO second electrode 650 of 600 위에 on the metal buffer layer 640. . Plasma treatment is performed on the surface of the second electrode 650 with oxygen, nitrogen, or argon ions for a predetermined time under atmospheric pressure or vacuum.

By providing a grid film in the reaction chamber, it is possible to minimize the influence on the light emitting layer by trapping a part of oxygen ions in the plasma state in the reaction chamber where the grid film moves toward the substrate or controlling the moving speed.

Subsequently, in the same manner as forming the first light emitting part 630 on the substrate on which the second electrode 650 is formed, a second light emitting layer having a red light emitting layer of 300 μs of Alq ₃ : DCJTB (1%) is used. The light emitting unit 660 is formed.

Subsequently, the metal buffer layer 640 is formed in the same manner as above, and the plasma treatment is performed on the third electrode 670 and its surface.

Subsequently, a third light emitting part 680 having a 300 층 blue light emitting layer made of SAlq or DPVBi or the like in the same manner as when the first light emitting part 630 is formed on the substrate on which the third electrode 670 is formed. ).

The fourth electrode 690 has a thickness of about 1000 kHz on the substrate on which the third light emitting part 680 is formed. The fourth electrode 690 is composed of one thin film selected from Al, Ca, and Mg.

Subsequently, one or more protective films 691 are formed on the substrate on which the fourth electrode 690 is formed to protect the light emitting device and to serve as a moisture proof function. In the embodiment of the present invention, the protective film 691 is preferably formed to have a thickness of 1000 kPa using an organic film made of NPB, Alq ₃ or the like or an inorganic film made of SiN, SiON or the like.

In addition, in the present invention, in order to have high luminance efficiency, a diffusion layer 692, such as a transparent epoxy resin layer or a diffusion sheet having a large refractive index, is applied along the opposite side of the substrate on which the organic light emitting device is stacked to improve light linearity and improve light emission efficiency. Improved. As the method for forming the epoxy resin layer, screen printing, spin coating, inkjet printing, doctor blade, mold method, etc. are used, and the thickness of the final coating layer after firing is in the range of 1 micrometer (um) -1 millimeter (mm). Formed to.

7 is a light emission spectrum of a red, green, and blue organic light emitting diode fabricated in the same structure as the first light emitting unit of the present invention to explain the light emission spectrum according to the embodiment of the present invention.

When the device structure is described in detail, a positive electrode is formed of an ITO thin film on a transparent substrate, and plasma is treated with oxygen or nitrogen ions at atmospheric pressure on the surface of the ITO electrode thin film.

Subsequently, a vacuum injection process was performed on the substrate on which the positive electrode was formed by vacuum thermal evaporation of a CuPC 100Å hole injection layer, an NPB 500Å hole transport layer, a 300Å light emitting layer, an Alq ₃ 300Å electron transport layer, a LiF 5Å electron injection layer, and an Al 1000Å negative electrode. To form an organic light emitting device.

The light emitting layer has a structure of Alq ₃ : DCJTB (1%) for the red light emitting layer, Alq ₃ for the green light emitting layer, and DPVBi for the blue light emitting layer.

Looking at the emission spectrum of Figure 7 it can be seen that the blue, green, red emission spectrum of 454nm, 534nm, 620nm.

8 illustrates emission spectra of first, second and third light emitting units when a red organic light emitting diode is manufactured according to the present invention. Referring to the emission spectrum of FIG. 8, the spectrum located in the first emission layer (1-layer) of the emission layer of the three-layer stacked structure shows an emission spectrum of 615 nm, and the second emission portion (2-layer) is 620 nm and the third emission The 3-layer shows emission spectra of 630 nm and 740 nm. This is because the spectrum of each light emitting part is changed by the optical effect when the light emission spectrum generated inside the organic light emitting element passes through the light emitting element.

9 illustrates emission spectra of the first, second and third light emitting units when the green organic light emitting diode is manufactured according to the present invention. Referring to the emission spectrum of FIG. 9, the spectrum located in the first emission layer (1-layer) of the emission layer of the three-layer stacked structure shows an emission spectrum of 560 nm, and the second emission portion (2-layer) is 482 nm and 584 nm, and The 3-layers show emission spectra at 476 nm and 594 nm. It can be seen that the spectrum of the first light emitting part slightly shifts to a long wavelength, but the emission spectra of the second light emitting part and the third light emitting part vary greatly.

10 illustrates emission spectra of the first, second and third light emitting units when the blue organic light emitting diode is manufactured according to the present invention. Referring to the emission spectrum of FIG. 10, the spectrum located at the first emission layer (1-layer) of the emission layer of the three-layer stacked structure shows emission spectra of 436 nm and 482 nm, and the second emission portion (2-layer) is 468 nm, and 3 light emitting layer (3-layer) shows an emission spectrum of 465nm.

In the red and green organic light emitting diodes, the light emission luminance decreases as the light emitting layer rises to the upper layer, and in the case of the green organic light emitting diode, the emission spectrum is changed by the optical effect. By the optical effect, the emission spectrum is separated into 436 nm and 482 nm and the luminance is low, but when the upper layer is positioned, the line width of the emission spectrum is reduced, the color purity is improved, and the emission luminance is also increased.

Based on the above experimental results, in the structure of the three-layer stacked organic light emitting device of the present invention, a three-layer stacked organic light emitting device was manufactured, wherein the blue light emitting layer was positioned at the top layer.

FIG. 11 shows the spectrum of each light emitting part of the organic light emitting element in which a green light emitting layer is laminated on the first light emitting part, a red light emitting layer is laminated on the second light emitting part, and a blue light emitting layer is laminated on the third light emitting part. The spectrum located in the first light emitting part (1-layer) of the light emitting layer of the three-layer stacked structure shows an emission spectrum of 560 nm, the second light emitting part (2-layer) is 620 nm, and the third light emitting part (3-layer) is 465 nm The emission spectrum of

12 is a schematic diagram illustrating an electrode pattern formed on a substrate according to another embodiment of the present invention.

The biggest drawback in increasing the size of the organic light emitting device is that it is difficult to emit uniform light due to dark spots and the like caused by impurity particles on the substrate. In order to solve this problem, in the present invention, an electrode pattern is formed on a substrate as shown in FIG. 12, and a transparent epoxy resin layer having a diffusion function is applied to secure an optical uniformity of light emitted on the opposite side of the substrate having an organic light emitting layer, Alternatively, a powder composed of SiO ₂ components is added to the coating layer, or a diffusion sheet is applied.

Referring to FIG. 12, a pattern 1220 is formed using a photoresist (PR) or the like to have a predetermined pattern 1210 on a substrate 1200 on which transparent or opaque electrodes are formed.

Subsequently, the light emitting layer is formed as described above using the substrate on which the pattern is formed. When the substrate on which the pattern is formed is used, even though dark spots are generated by impurity particles on the substrate, only a portion where dark spots are generated due to the PR pattern has an advantage of lowering of the luminance.

Subsequently, a transparent epoxy resin layer having a diffusion function is coated on the surface opposite the substrate on which the organic light emitting layer is formed, or a powder composed of SiO ₂ components is added to the coating layer, or a diffusion sheet is applied. The diffusion layer plays a role of ensuring optical uniformity of the emitted light even if the light emission luminance of the portion where the dark spot is generated in the organic light emitting device is reduced.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, the scope of the present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which is attached It is included in the spirit and scope of the present invention as defined in the claims.

The stacked organic light emitting device according to the present invention is a backlight having a time division method of sequentially emitting red, green, and blue colors by using an red light green (RGB) tricolor organic light emitting device, and combines a backlight and a color filter. When the OLED is made of OLED, it has the advantage of being able to manufacture ultra thin compared to the existing backlight type, minimize the power consumption, and make the display medium and large in size because it is a surface light source.

In addition, as described above, the stacked organic light emitting diode for the field sequential color type liquid crystal display device of the present invention may obtain the following effects.

First, compared to the conventional liquid crystal display device, the present invention provides a temporal division method by using the field sequential color method, so that 9 times as many pixels as the conventional method can be obtained. .

Second, since the present invention is a filter sequential color type liquid crystal display in which the backlight unit and the color filter are combined, the thickness of the product and the number of manufacturing processes can be reduced.

Third, since the optical sheet such as a reflector, prism sheet, or light guide plate is not required, light loss can be minimized, and as a result, light efficiency can be improved.

Fourthly, the present invention has the advantage that the display can be miniaturized and medium or large in size because it is a point light source or a surface light source.

Claims (15)

In the organic light-emitting device using a glass or flexible film substrate comprising a light emitting layer laminated on the positive electrode and the negative electrode by an organic film, The light emitting layer has a structure in which three light emitting layers of red, green, and blue are stacked. An ITO transparent electrode including a transflective metal buffer layer is formed between each light emitting layer to be a positive electrode or a negative electrode, The organic light emitting device of claim 1, wherein a transparent high refractive index diffusion layer is provided along the opposite surface of the substrate on which the light emitting layer is formed. The organic light emitting device of claim 1, wherein the light emitting layer has a blue light emitting layer as a top layer in order to increase the surface light efficiency of red, green, and blue tricolor light, and the red and green light emitting layers are stacked in any order. . The method of claim 1, wherein the diffusion layer is formed using any one of a method of mold, doctor blade, spray, screen printing, spin coating and inkjet printing, the thickness of the final coating layer after firing is 1㎛ ~ 1 The laminated organic light emitting device, characterized in that within the range of mm. The organic light emitting device of claim 1, wherein the diffusion layer is formed by attaching a film diffusion sheet on a substrate or by using a transparent epoxy. The multilayer organic light-emitting device of claim 1, wherein the diffusion layer is formed by adding a powder composed of SiO ₂ to an epoxy to ensure optical uniformity of light. The organic light emitting device of claim 1, wherein the organic light emitting device first forms a diffusion layer by a large area substrate, and then cuts and manufactures the substrate for compatibility with an organic deposition apparatus. The organic light emitting device of claim 1, wherein the organic light emitting device is advanced in order to increase the light efficiency of the light transmitted during the manufacturing of the organic light emitting device and to simplify the process, and the diffusion layer is fabricated later. The organic light emitting device of claim 1, wherein the organic light emitting device is photo-patterned with a uniform shape to form a lowermost transparent or opaque electrode in order to improve a lifetime and a production yield. The electrode formed on the interface of the light emitting layer is a sputter of the electrode in a reaction chamber provided with a grid film for controlling oxygen ions and a sputter target of the electrode by varying and applying a voltage of 0-100V. A stacked organic light emitting device, characterized in that formed by plasma excitation of ions and oxygen ions of a target. The organic light emitting device of claim 1, wherein the organic light emitting device is oxygen RF / UV plasma treated in a vacuum state on a surface of an ITO transparent electrode including a transflective metal buffer layer formed at an interface of the light emitting layer. The method of claim 1, wherein the transparent electrode formed between the light emitting layer is any one of a method of RF sputter, grid RF sputter, DC sputter, DC pulse sputter, atomic layer deposition (ALD) and plasma enhanced atomic layer deposition (PEALD). The stacked organic light emitting device, characterized in that the manufacturing method. The ITO transparent electrode formed between the light emitting layers is formed by stacking any one of LiF / Al / Ag, Ca / Ag and Ag / Ca to form an ultra-thin metal in order to minimize damage to the organic thin film. The surface of the metal is subjected to oxygen RF / UV plasma treatment at atmospheric pressure or vacuum, alloyed to increase adhesion to the organic light emitting film, and the total thickness of the metal buffer layer has a range of 1 to 20 nm. A laminated organic light emitting element. The organic light emitting device of claim 1, wherein the light emitting layer further comprises a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer, and each of the three light emitting layers is configured between the hole transport layer and the electron transport layer. . The method of claim 1, wherein the substrate for the organic light emitting device is characterized in that the material of any one of plastic, PET, PES, PC, and a thin silicon wafer (thin Si wafer) having a glass to bendable properties. A laminated organic light emitting element. The organic light emitting device of claim 1, wherein the organic light emitting device comprises one of an organic thin film stack, an inorganic thin film stack, an organic / inorganic mixed thin film stack, a stainless steel can, and a glass can to prevent penetration of moisture and oxygen. Laminated organic light emitting device, characterized in that it further comprises.

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