KR100805270B1 - Flexible organic light emitting diode using transparent organic based electrode and method for manufacturing this - Google Patents

Abstract

A flexible organic light emitting diode using a transparent organic electrode, a display panel using the same, and a method for manufacturing the same are provided to manufacture a diode having enhanced electron injection efficiency. A flexible organic light emitting diode using a transparent organic electrode(41) includes a flexible substrate(40), the transparent organic electrode, a metallic electrode(47), and an organic light emitting layer(48). The flexible substrate is made of transparent plastic. A pattern is formed in the top of the flexible substrate by a printing method. Electrons are injected into the transparent organic electrode. Holes are injected into the metallic electrode. The organic light emitting layer is deposited in the top of the transparent organic electrode and is positioned in the bottom of the metallic electrode. A polaron exciton is formed by the contact of the electrons and the holes.

Description

Flexible organic light emitting diode using organic transparent electrode, display panel using same and method for manufacturing the same {Flexible organic light emitting diode using transparent organic based electrode and Method for manufacturing this}

1 is a structural diagram of a conventional organic light emitting device.

2A and 2B show a TFT driving circuit of a conventional AMOLED.

3 is a structural diagram of a conventional top-emission organic light emitting device.

4 is a structural diagram of a flexible organic light emitting device to which an organic transparent electrode according to the present invention is applied.

5 is a flowchart illustrating a method of manufacturing a flexible organic light emitting device to which an organic transparent electrode according to the present invention is applied.

The present invention relates to an organic light emitting diode (OLED), and more particularly, to a flexible organic light emitting diode to which an organic transparent electrode is applied, a display panel using the same, and a manufacturing method thereof.

In general, the panel using the organic electroluminescent device has the advantages of low voltage driving, high luminous efficiency, wide viewing angle, fast response speed, etc., and is one of the next-generation flat panel display technologies capable of displaying high-quality video, and the technology development is actively progressed. It is becoming.

1 is a cross-sectional view of a conventional organic electroluminescent device. 1, the glass substrate 10, the ITO transparent electrode (cathode) 11, the hole injection layer 12, the hole transport layer 13, the light emitting layer 14, the electron transport layer 15, and the electron injection layer 16. In the form of electrodes formed on both sides of the electroluminescent layer having the cathode 17, it is attracting attention as a next-generation flat panel display because of its features such as wide viewing angle, high opening ratio, and high chromaticity.

The conventional organic electroluminescent device includes a glass substrate 10 through which light is emitted, and one side of the glass substrate 10 has a positive electrode 11 which is a transparent electrode such as ITO to which positive voltage is applied, and a voltage applied to both ends. The organic light emitting layer 18, which emits light by the light emitting layer, and the negative electrode 17 having a material having a low work function (Ca, Li, Al, Mg, Ag, etc.) and having a negative voltage applied thereto are sequentially stacked. do. When a forward voltage is applied to the organic EL device, electrons and holes are injected from the negative electrode 17 and the positive electrode 11. The injected electrons and holes are combined in the organic light emitting layer 18 to form a pair and then disappear. In this process, light is generated in the organic light emitting layer 18 and is emitted to the flat substrate 10.

Glass substrates used in conventional flat panel displays have the advantage of stability in processes such as electrode generation and TFT manufacturing, but are not suitable for flexible displays as roll displays or next-generation displays for mobile communications because they are heavy and rigid. In order to apply to a flexible display, instead of a glass substrate, a transparent and flexible plastic substrate should be replaced. Since the heat resistance temperature is considerably lower than that of the glass substrate, the plastic substrate has heat resistance of about 150 to 200 ° C. In the case of forming a transparent electrode by sputtering the electrode on a plastic substrate, heat treatment is not easy, and thus there is a limitation in lowering the resistivity of the film. In addition, the ITO has a smaller coefficient of thermal expansion than a polymer plastic substrate, which may cause deformation of the substrate by thermal expansion of the substrate and the electrode at different rates due to long thermal history during device manufacturing or driving. In addition, the conventional ITO electrode may be brittle or crack due to weak mechanical strength, which may cause a problem in that the surface resistance of the electrode increases as the flexible electrode substrate is bent.

The organic light emitting device as described above is classified into a passive matrix OLED (PMOLED) and an active organic light emitting device (AMOLED) according to the driving method. The dual AMOLED driving method supplies a uniform current to the pixels by TFT elements located in each pixel, thereby solving problems such as luminance deterioration and unevenness that occur as the screen size increases in PMOLED, thereby enabling low power consumption and long life. In addition, AMOLED devices have been recognized for their potential as one of the major large-area flat panel displays of the future, and are currently being accelerated in development and mass production.

In general, AMOLED is classified into a-Si TFT, low temperature poly-Si (LTPS) TFT according to the type of thin film transistor (TFT) substrate used in the driving device of the panel. Accordingly, as shown in Figure 2a and 2b, it can be divided into n-type, p-type. This can affect the characteristics and size of the device. Among them, LTPS has higher carrier mobility than a-Si, and only n-type TFT can be manufactured on a-Si substrate, whereas n-type and p-type TFT can be manufactured on this substrate. Products use LTPS substrates.

However, LTPS TFTs require more masks in the manufacturing process than a-Si TFTs and are relatively difficult to manufacture, which limits the usable substrate size. Considering yield and manufacturing cost, a-Si TFT technology is much more advantageous in large area display such as TV. Therefore, the necessity and interest of technology development that can apply a-Si substrate technology to OLED is increasing. However, since only n-channel TFT can be used as the a-Si substrate technology, a conventional OLED having a bottom anode as shown in FIG. 2A can be manufactured only at the source end of the a-Si TFT driver. This can reduce the stability of the source voltage, which is affected by the voltage drop between the OLED materials.

As a structure for improving this, there is a top-emission OLED in which the conventional structure is inverted, and the structure of the device is shown in FIG. 3. Referring to FIG. 3, a metal negative electrode such as Al having a glass substrate 20, and on the upper portion of the glass substrate 20, reflects light emitted from the organic layer 28 as a metal cathode having a low work function, unlike in FIG. 1. The electrode 27, the organic light emitting layer 28 in which light emission is generated by voltages applied at both ends, and a transparent ITO positive electrode 21 having a high work function are sequentially stacked.

When voltage is applied to the organic electroluminescent device, electrons and holes are injected from the negative electrode 27 and the positive electrode 21, and the injected electrons and holes are combined in the organic light emitting layer 28 to form a pair. Light is generated as it disappears, and the emitted light 29 is reflected from the negative electrode toward the substrate to be emitted toward the top.

This structure has the advantage of being used in AMOLED to increase the effective light emitting area of the pixel to increase the luminous efficiency.

US Pat. No. 5,693,956 discloses "Inverted OLED on hard plastic substrate." The disclosed structure is an inverted top emission structure in which a transparent electrode is positioned at the top. In order to solve the problem of the structure, a transparent electrode is positioned at the bottom, and the transparent electrode has a low work function as a cathode.

Meanwhile, US Patent No. 6,046,543 discloses "High reliability, high efficiency, integratable organic light emitting devices and methods of producing same." The disclosed structure is a structure having a smoothing layer between the substrate and the cathode electrode.

However, as shown in FIG. 3, in the conventional organic light emitting device, since the ITO thin film used as the positive transparent electrode is positioned on the upper side, damage may occur to the organic light emitting layer when sputter deposition is used. To solve this problem, when using Au or Ag / TeO ₂ as a semi-transparent film by thermal evaporation deposition, instead of ITO transparent electrode, the 'microcavity effect' generated from both reflective metal electrodes and semi-transparent metal electrodes There is a problem that can limit the advantages of the top emission structure by changing according to the viewing angle of the EL spectra due to the (microcavity effect).

Therefore, the first technical problem to be achieved by the present invention is to have a low work function (3-4 eV) instead of the ITO electrode mainly used on the glass substrate as a positive electrode because it has a high work function (~ 5 eV) as a conventional transparent electrode As a negative electrode, it is possible to manufacture a device with increased electron injection efficiency, and the coating method is also applied to a flexible substrate such as plastic by using a printing method (screen printing, roll to roll, ink-jet, imprinting, etc.). The present invention provides a flexible organic light emitting device using an organic transparent electrode that can be manufactured at a low cost and can be applied to various display fields as well as a surface light source or a touch panel.

The second technical problem to be achieved by the present invention is to provide a display panel using the flexible organic light emitting device to which the organic transparent electrode is applied.

The third technical problem to be achieved by the present invention is to provide a method of manufacturing a flexible organic light emitting device to which the organic transparent electrode is applied.

In order to achieve the first technical problem, the present invention is a flexible substrate made of a transparent plastic; An organic transparent electrode having a pattern formed on the flexible substrate by a printing method and injecting electrons; A metal electrode in which holes are injected; And an organic light emitting layer deposited on the organic transparent electrode and positioned below the metal electrode, wherein an organic light emitting layer is formed in which electrons injected into the organic transparent electrode and holes injected into the metal electrode meet to form a polaron exciton. It provides a flexible organic light emitting device to which the applied.

In order to achieve the above second technical problem, the present invention is a flexible substrate made of a transparent plastic; An organic transparent electrode having a pattern formed on the flexible substrate by a printing method and injecting electrons therein; A metal electrode in which holes are injected; An organic light emitting layer deposited on the organic transparent electrode, positioned below the metal electrode, and formed with the electrons injected into the organic transparent electrode and the holes injected into the metal electrode to form polaron excitons; And it provides a display panel using a flexible organic light emitting device to which an organic transparent electrode including a driving circuit for applying a voltage across the metal electrode and the organic transparent electrode.

In order to achieve the third technical problem, the present invention comprises the steps of forming a pattern by printing an organic transparent electrode on the flexible substrate made of a transparent plastic; Depositing an organic light emitting layer which is an organic layer on the organic transparent electrode by thermal vapor deposition; And it provides a method of manufacturing a flexible organic light emitting device to which an organic transparent electrode comprising the step of depositing a metal electrode on the organic light emitting layer.

The present invention uses an organic transparent electrode in place of the conventional ITO transparent electrode, but by applying the organic transparent electrode having a low work function as a cathode to increase the stability and efficiency, active organic light emission using an amorphous silicon thin film transistor as a substrate The present invention relates to a method of manufacturing a flexible organic light emitting device applicable to an active matrix OLED (AMOLED).

Hereinafter, the characteristics of the organic transparent electrode applied to the present invention will be described.

Currently, organic transparent electrodes using various materials such as conductive polymers and carbon nanotubes have been developed.

Only when the following considerations are satisfied, an organic transparent electrode may be formed on a plastic substrate to be commercialized as a common electrode. That is, it is mechanically stable even when the device is bent or folded, matching thermal expansion coefficient with a plastic substrate, excellent adhesion to the substrate, excellent interfacial characteristics with an image material or dielectric such as liquid crystal, phosphor, or light emitting body, and chemical resistance for stability in subsequent processes. , Durability such as heat and moisture resistance to meet the reliability of the device.

Only a few of the following requirements must be satisfied in order to economically construct an organic transparent electrode circuit on a plastic substrate and commercialize it as a pixel electrode. That is, the applicability of printing methods such as inkjet, the applicability to terminal electrodes for organic TFTs such as the source and the drain, the applicability to the wiring electrodes, and the like.

In consideration of flexibility, adhesiveness, thermal expansion characteristics, and printability, it is preferable to use an organic material that best balances the physical properties of the plastic substrate as the electrode material for the flexible display. And an electrode using carbon nanotubes.

Despite the advantages of adhesion to the plastic substrate, coefficient of thermal expansion, flexibility, etc., most conductive polymers have low solubility and are difficult to process, and exhibit semiconducting properties with energy band gap of less than 3 eV. Because it absorbs the color is essentially a color, when the coating with a thin film in order to increase the permeability increases the surface resistance.

Circuit patterning is essential to fabricate display devices using organic transparent electrodes, and the patterning method of organic transparent electrodes may introduce photoresist and etching processes as in conventional ITO glass, but the process is simple, low cost, and large It is a desirable development direction to configure circuit patterning in the possible printing manner.

If a conductive polymer ink capable of printing is developed, the circuit and pixel electrode material for flat panel display can be replaced by the convenience and cost advantage of the conventional ITO electrode.

When the conductive polymer induces the delocalization of the electron density by doping, the electrical conductivity becomes high. However, since the solubility of the conductive polymer decreases during the doping, it is difficult to improve both the conductivity and the process characteristics. The conductive and process characteristics of the conductive polymer can be improved by nanoparticles of the doped conductive polymer and dispersed in a solvent. When an alkyl group or the like is introduced to increase the solubility of the conductive polymer, the conductivity is relatively low because the doping level is lowered instead of higher solubility. The conductive polymer transparent electrode can be used as a common electrode when coated on a plastic substrate in a roll-to-roll method, and it is expected to replace conventional ITO film by its physical properties and price advantage by improving conductivity and durability compared to transmittance. do.

In the case of the carbon nanotube transparent electrode, the technology of purifying pure carbon nanotubes from impurities, the technology of separating individual carbon nanotubes from bundles, the technology of separating only metallic carbon nanotubes from the individual carbon nanotubes separated from each other, It is possible to manufacture a transparent electrode having high transparency and low resistance only by developing a technology for evenly dispersing carbon nanotubes in a medium. The most preferable form of the carbon nanotube electrode for forming the transparent electrode is to selectively separate only the conductive carbon nanotubes among the high-purity carbon nanotubes from which impurities are removed without oxidation defects, and evenly disperse them evenly in a matrix at a nanoscale. . In the case of dispersing carbon nanotubes in a nonconductive binder polymer, the transparency is determined by the percolation threshold of the carbon nanotubes, which is related to the separation and dispersion of the carbon nanotubes. In order to improve the conductivity of carbon nanotubes or composite electrodes, it is important to improve the conductivity of carbon nanotubes themselves.

Since the present invention has a high work function (~ 5 eV) as a conventional transparent electrode, it is used as a negative electrode because it has a low work function (3 to 4.5 eV) instead of the ITO electrode which is mainly used on a glass substrate as a positive electrode. Possible, transparent and flexible organic electrodes are used. This makes it possible to manufacture a flexible OLED device that can be manufactured in a large area and at a low cost on a flexible substrate such as plastic.

In the conventional top emission type inverted AMOLED structure, when the transparent electrode ITO is positioned as the top electrode as the positive electrode, there is a possibility that the organic light emitting layer may be damaged by the sputter deposition method when fabricating the ITO positive electrode located on the top, which is a translucent metal. In order to solve this problem, a method of replacing the ITO transparent electrode with another material and placing it at the bottom may be used. As the bottom electrode requires a low work function as the cathode, ITO with high work function is not suitable.

Therefore, the present invention improves electron injection efficiency by using a conductive organic material having a low work function as a bottom negative electrode, and solves the above-mentioned disadvantages, and the bottom cathode is directly at the drain end of the a-Si TFT. This makes it possible to manufacture a-Si TFT AMOLED with large area because it is more stable without being influenced by OLED. In this case, the gate and source voltages are directly connected to the gate and data lines.

In addition, the organic electrode material can be printed by a printing method (screen printing, roll to roll, ink-jet printing, imprinting), it is possible to use a large area substrate and to reduce the process cost for the pattern.

Accordingly, the present invention provides a flexible AMOLED device having a low cost, efficient and large area, and a method of manufacturing the same.

Hereinafter, with reference to the drawings will be described a preferred embodiment of the present invention. However, embodiments of the present invention illustrated below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

4 is a structural diagram of a flexible organic light emitting device to which an organic transparent electrode according to the present invention is applied.

As shown in FIG. 4, the transparent, flexible, and low work function (~ 3 to 4eV) organic transparent electrode 41 can be printed on the flexible substrate 40 (screen printing, ink-jet printing, roll to roll). , imprinting) to form a pattern. On the other hand, the present invention, unlike the conventional patent, the cathode electrode is located directly on the substrate without a smoothing layer and uses a transparent organic electrode 41 as the cathode electrode. Preferably, the organic transparent electrode 41 applied to the present invention may use a polymer of PEDOT-PSS [Poly (3,4-ethylenedioxythiophene) -poly (styrene sulfonate)].

The organic light emitting layer 48 is deposited by thermal evaporation deposition in a vacuum, patterned using a shadow metal mask or patterned by a printing method (ink-jet printing, etc.), and then thermal evaporation deposition (thermal evaporation deposition). Or by e-beam evaporation, a metal having a large work function (> -5 eV) is deposited and patterned with a metal mask. In this case, as shown in FIG. 4, the organic light emitting layer 48 may include an electron injection layer 42, an electron transport layer 43, a light emitting layer 44, a hole transport layer 45, and a hole injection layer 46.

Materials that can be used as the anode 47 in the present invention is a metal having a high work function (4.5 ~ 5.5 eV), for example, Au (5.1 eV), Ni (5.24 eV), Pt (5.3 eV), Cu (4.65 eV).

When voltage is applied to the organic light emitting device formed as described above, electrons and holes are injected from the cathode 41 and the anode 47, respectively, and the injected electrons and holes are respectively negative and positive polarons. ) And move in the light emitting layer 44 to meet each other to generate a polaron-exciton. When these excitons dissipate light, the light corresponding to the polar gap energy (polarity difference between Lowest Unoccupied Molecular Orbital (LUMO) and Highest Occupied Molecular Orbital (HOMO)) is transparent. And 41 through the transparent flexible substrate.

Such OLED devices are integrated on an a-Si TFT substrate to enable a large area of AMOLED.

5 is a flowchart illustrating a method of manufacturing a flexible organic light emitting device to which an organic transparent electrode according to the present invention is applied.

First, a pattern is formed on a flexible substrate made of transparent plastic by a method of printing an organic transparent electrode (step 510). This process (510) may include forming an organic transparent electrode using a conductive polymer or carbon nanotubes. Preferably, the organic transparent electrode uses a transparent and flexible material having a work function of 3 to 4.5 eV. Preferably, the organic transparent electrode applied to the present invention may use a polymer of PEDOT-PSS [Poly (3,4-ethylenedioxythiophene) -poly (styrene sulfonate)].

This process 510 may be a process of printing the organic transparent electrode on the flexible substrate by any one of screen printing, roll-to-roll, inkjet, or imprinting.

Next, an organic light emitting layer, which is an organic layer, is deposited on the organic transparent electrode by thermal vapor deposition (step 520). This process (520) is a process of depositing an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, a hole injection layer on the organic transparent electrode in order by using a low-molecular or polymer material in a vacuum by thermal vapor deposition Can be.

Finally, a metal electrode is deposited on the organic light emitting layer (S530). In the present invention, a material that can be used as an anode or an anode is a metal having a high work function (4.5 to 5.5 eV), for example, Au (5.1 eV), Ni (5.24 eV), Pt (5.3 eV), Cu ( 4.65 eV).

According to the present invention, it is possible to manufacture flexible OLED by replacing ITO and applying flexible organic electrode material.

The ITO electrode, which is used as a pixel electrode of a conventional flat panel display, is manufactured under process conditions suitable for a glass substrate, and the material cost is high because expensive indium is used. In addition, the conventional ITO electrode is fragile when used in a flexible display application that must be resistant to mechanical impact, and also has a problem of process durability due to poor durability, adhesive strength with a plastic substrate, and difference in thermal expansion coefficient. Etc. are not suitable as electrodes of a flexible display. In the case of using the conductive transparent organic electrode in the present invention, since the adhesion to the plastic substrate, the stability of the conductivity against thermal expansion or deformation is excellent, the flexible display can be manufactured by physical properties and price advantages.

According to the present invention, it is possible to manufacture a low-cost, large-area OLED device by the coating method.

Conventional ITO electrodes are deposited by sputter deposition and form patterns by photo processes, thereby limiting the substrate size by equipment and manufacturing processes and high manufacturing costs, while organic electrode materials are printed by screen printing, roll to roll, Ink-jet printing, imprinting, etc.) can be used to form coatings and patterns simultaneously and to apply to large area substrates, enabling large area device fabrication and reducing process costs.

According to the present invention, it is possible to manufacture an AMOLED that can use an a-Si TFT substrate.

In the conventional top emission type inverted AMOLED structure, when the transparent electrode ITO is positioned as the top electrode as the positive electrode, there is a possibility that the organic light emitting layer may be damaged by the sputter deposition method when fabricating the ITO positive electrode located on the top, which is a translucent metal. When it is replaced with, the nonuniformity of EL characteristics may appear.

By placing the transparent organic electrode at the bottom as in the present invention, in the conventional top emission type inverted AMOLED structure, it is possible to solve the disadvantage that may occur when the transparent electrode ITO is positioned at the top position as a positive electrode. In addition, since the bottom electrode requires a low work function as the cathode, ITO having a high work function is not suitable. Therefore, by using a conductive organic material having a low work function as the bottom negative electrode, the electron injection efficiency is improved and the bottom cathode is a-. Since it is directly connected to the drain end of the Si TFT, the a-Si TFT driving substrate can be used more stably, and thus a flexible AMOLED device having an efficient, stable and large area can be manufactured. As described above, the conductive organic material includes a conductive polymer, a carbon nanotube composite material conductive polymer, and the like.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and will be understood by those of ordinary skill in the art that various modifications and variations can be made therefrom. However, such modifications should be considered to be within the technical protection scope of the present invention. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, according to the present invention, since the organic transparent electrode is applicable to a flexible substrate and has a low work function, it is possible to replace ITO, which is a transparent electrode having a high work function, so that a device having an increased electron injection efficiency can be manufactured. In addition, the coating method has a large area and is inexpensive, and thus can be applied to various display fields as well as a surface light source or a touch panel.

Claims (15)

Flexible substrate made of transparent plastic; An organic transparent electrode having a pattern formed on the flexible substrate by a printing method and injecting electrons therein; A metal electrode in which holes are injected; And An organic transparent electrode disposed on the organic transparent electrode, positioned below the metal electrode, and including an organic light emitting layer in which electrons injected into the organic transparent electrode and holes injected into the metal electrode meet to form a polaron exciton; Applied flexible organic light emitting device. The method of claim 1, The organic transparent electrode Flexible organic light-emitting device to which the organic transparent electrode is applied, characterized in that the transparent electrode formed using a conductive polymer or carbon nanotubes. The method of claim 1, The organic transparent electrode A flexible organic light-emitting device to which an organic transparent electrode is applied, wherein the work function is 3 to 4.5 eV. The method of claim 1, The organic transparent electrode A flexible organic light-emitting device to which an organic transparent electrode is applied, which is printed on the flexible substrate by any one of screen printing, roll-to-roll, inkjet, and imprinting. The method of claim 1, The organic transparent electrode PEDOT: Flexible organic light-emitting device to which an organic transparent electrode is applied, comprising a polymer of PSS system. The method of claim 1, The organic light emitting layer is On the organic transparent electrode, an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, and a hole injection layer are deposited by thermal vapor deposition in a vacuum order, and the organic transparent electrode is applied to the organic transparent electrode. Flexible organic light emitting device. The method of claim 6, The light emitting layer is A flexible organic light-emitting device to which an organic transparent electrode is applied, wherein the polaron exciton is formed and the polaron exciton is an organic layer that emits light. The method of claim 1, The metal electrode A flexible organic light emitting device to which an organic transparent electrode is applied, wherein the work function is 4.5 to 5.5 eV. Flexible substrate made of transparent plastic; An organic transparent electrode having a pattern formed on the flexible substrate by a printing method and injecting electrons therein; A metal electrode in which holes are injected; An organic light emitting layer deposited on the organic transparent electrode, positioned below the metal electrode, and formed with the electrons injected into the organic transparent electrode and the holes injected into the metal electrode to form polaron excitons; And A display panel using a flexible organic light emitting device to which an organic transparent electrode including a driving circuit for applying a voltage across the metal electrode and the organic transparent electrode is applied. Forming a pattern on the flexible substrate made of transparent plastic by printing an organic transparent electrode; Depositing an organic light emitting layer which is an organic layer on the organic transparent electrode by thermal vapor deposition; And Method of manufacturing a flexible organic light emitting device to which an organic transparent electrode comprising the step of depositing a metal electrode on the organic light emitting layer. The method of claim 10, Forming a pattern by printing the organic transparent electrode A method of manufacturing a flexible organic light-emitting device to which an organic transparent electrode is applied, wherein the organic transparent electrode is formed by using a conductive polymer or carbon nanotubes. The method of claim 10, Forming a pattern by printing the organic transparent electrode A method of manufacturing a flexible organic light-emitting device to which an organic transparent electrode is applied, wherein the work function is a step of forming a transparent electrode having a pattern of 3 to 4.5 eV. The method of claim 10, Forming a pattern by printing the organic transparent electrode And printing the organic transparent electrode on the flexible substrate by any one of screen printing, roll-to-roll, inkjet, or imprinting. The method of claim 10, Depositing the organic light emitting layer is Organic transparent using the low molecular or polymer material to deposit an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, a hole injection layer on the organic transparent electrode in order in a vacuum by thermal vapor deposition method A method of manufacturing a flexible organic light emitting device to which the electrode is applied. The method of claim 10, The organic transparent electrode PEDOT: A method for manufacturing a flexible organic light emitting device to which an organic transparent electrode is applied, comprising a polymer of PSS system.

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