KR101376751B1 - Oled having organic solar cell and fabrication method thereof - Google Patents

Abstract

The present invention relates to an integrated OLED having an organic solar cell which includes: a substrate on which a convex part is formed one side and a concave part is formed the other side; an OLED device formed on one side of the substrate; and an OLED organic solar cell device formed on the other side of the substrate. The present invention increases efficiency of the integrated OLED having an organic solar cell by: implementing an OLED function and an organic solar cell function at the same time on the one substrate; forming the substrate in a three-dimensional structure having multiple protruding parts; forming an OLED on one side of the substrate having three-dimensional protruding parts; forming an organic solar cell on the other side of the substrate; and thereby increasing a specific surface area of the OLED and the organic solar cell.

Description

Organic solar cell integrated OLED and its manufacturing method {OLED HAVING ORGANIC SOLAR CELL AND FABRICATION METHOD THEREOF}

The present invention relates to an organic solar cell integrated OLED in which organic light emitting diodes (OLED) and an organic solar cell are integrally formed, and more particularly, to an OLED device formed on one side of a substrate and formed on the other side of the substrate. The present invention relates to an organic solar cell integrated OLED capable of simultaneously performing an OLED function and an organic solar cell function by forming an organic solar cell device, and a manufacturing method thereof.

In general, OLEDs (Organic Light Emitting Diodes) have advantages such as low power consumption, fast response speed and wide viewing angle. These OLEDs are simple and easy to fabricate, so they are used in ultra-thin and light-weight display devices with a thickness of less than 1 mm. Furthermore, they are manufactured on flexible substrates such as plastic instead of glass substrates to produce thinner, lighter, ) Devices.

Such an OLED includes an anode electrode, a hole transporting layer, an organic light emitting layer, an electron transporting layer, an electron injecting layer, and a cathode electrode.

Organic solar cells are photovoltaic devices that convert solar energy directly into electricity. Depending on the materials used, they can be largely classified into silicon solar cells and organic solar cells. Silicon solar cells are expensive and limited in reserves, which limits the application of solar energy. In contrast, organic solar cells have low manufacturing costs due to low cost and ease of manufacture, which does not require special vacuum equipment, Productivity is very good. In addition, due to the low-temperature process, it can be used for a glass substrate or a flexible substrate, and thus, attention has been focused on the advantages such as the possibility of producing a bendable device.

Such an organic solar cell includes an anode electrode, a hole transporting layer, a photoactive layer, an electron transporting layer, an electron injecting layer, and a cathode electrode.

Conventional OLEDs and organic solar cells are manufactured separately to charge the battery using the organic solar cell, and is implemented to display the OLED using the power of the charged battery.

In particular, in the case of the existing outdoor display device, when the organic solar cell is installed to display the OLED and charge the battery using solar energy, the manufacturing cost is high and the installation cost is increased because the OLED and the organic solar cell are separately installed. There is a problem that the space must be large.

A conventional OLED includes a positive electrode formed on a glass substrate and a transition metal layer formed on the positive electrode, as disclosed in Korean Patent Registration No. 10-0576738 (Apr. 27, 2006) A hole transporting layer formed on the hole transporting layer, an organic light emitting layer formed on the hole transporting layer, and a cathode formed on the organic light emitting layer.

In the conventional OLED, a substrate is formed in a flat plate shape, and an anode, a hole transporting layer, a transition metal layer, an organic light emitting layer, and a cathode are sequentially formed on the substrate. Since each organic thin film layer is formed on a plate- Is formed in a planar shape.

Therefore, the conventional OLED has a problem that the specific surface area is small and the efficiency is low. In addition, since OLED elements are formed only on one side of a substrate of a conventional OLED, there is a problem that the performance is degraded in the same area.

In addition, since the conventional OLED is formed as a single OLED on the substrate, a separate solar cell for supplying power to the OLED is required, and thus there is a problem in that the manufacturing cost is high and the installation space is increased.

Korean Patent Registration No. 10-0576738 (April 27, 2006)

Therefore, an object of the present invention is to form an OLED device on one side of the substrate and an organic solar cell device on the other side of the substrate, an organic solar cell integrated OLED and a method of manufacturing the same that can implement the OLED function and organic solar cell function at the same time To provide.

Another object of the present invention is to form a substrate in a three-dimensional structure having a plurality of uneven parts, to form an OLED on one side of the substrate having a three-dimensional uneven portion and to form an organic solar cell on the other side of the substrate to the ratio of the OLED and the organic solar cell It is an object of the present invention to provide an organic solar cell-integrated OLED and a method of manufacturing the same, which can improve efficiency by increasing the surface area.

Another object of the present invention is to form an organic thin film layer by spraying a solution with a nozzle in a spray method, and by spraying a hot gas when the solution is being sprayed from the nozzle in the air to evaporate the solvent, it is possible to uniformly form the thickness of the organic thin film layer The present invention provides an organic solar cell integrated OLED capable of improving the surface precision of an organic thin film layer and a method of manufacturing the same.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. .

In order to achieve the above object, the organic solar cell integrated OLED of the present invention is a substrate having a convex portion formed on one surface and a concave portion formed on the other surface, an OLED element formed on one surface of the substrate, and an organic formed on the other surface of the substrate It comprises a solar cell element.

The OLED device of the present invention includes an anode electrode formed on the substrate, a plurality of organic thin film layers formed on the anode electrode, and a cathode electrode formed on the plurality of organic thin film layers, wherein the plurality of organic thin film layers are hole transport layers , An organic light emitting layer, an electron transport layer and an electron injection layer.

The organic solar cell device of the present invention includes an anode electrode formed on a substrate, a plurality of organic thin film layers formed on the anode electrode, and a cathode electrode formed on the plurality of organic thin film layers, wherein the plurality of organic thin film layers It characterized in that it comprises a hole transport layer, a photoactive layer, an electron transport layer and an electron injection layer.

At least one of the plurality of organic thin film layers of the present invention is formed by a spray method for injecting a solution on a substrate, the spray method injects a solution in a spray unit, by spraying a hot gas to the solution in flight by spraying from the spray unit It is characterized by volatilizing the solvent contained in the solution.

The organic solar cell integrated OLED manufacturing method of the present invention comprises the steps of preparing a substrate having a convex portion formed on one surface and a concave portion formed on the other surface, forming an OLED on one surface of the substrate on which the convex portion is formed, the substrate having the concave portion formed Characterized in that it comprises the step of forming an organic solar cell device on the other side of the.

Forming an OLED device of the present invention includes forming an anode electrode on one surface of the substrate, forming a plurality of organic thin film layers on the anode electrode, and forming a cathode electrode on the organic thin film layer; The forming of the plurality of organic thin film layers may be performed by sequentially forming a hole transport layer, an organic light emitting layer, an electron transport layer, and an electron injection layer.

The forming of the organic solar cell device of the present invention includes forming an anode electrode on one surface of the substrate, forming a plurality of organic thin film layers on the anode electrode, and forming a cathode electrode on the organic thin film layer. The forming of the plurality of organic thin film layers may include sequentially forming a hole transport layer, a photoactive layer, an electron transport layer, and an electron injection layer.

Forming a plurality of organic thin film layers of the present invention comprises the steps of setting the pressure and temperature of the gas in accordance with the type of solvent contained in the spray solution, spraying the solution on the substrate in the spray unit, the sprayed solution in flight It characterized in that it comprises the step of volatilizing the solvent contained in the solution by injecting hot gas to the solution.

As described above, the organic solar cell-integrated OLED of the present invention has the advantage of forming an OLED element on one side of the substrate and an organic solar cell element on the other side of the substrate, thereby simultaneously implementing the OLED function and the organic solar cell function. .

In addition, the organic solar cell-integrated OLED of the present invention forms a substrate in a three-dimensional structure having a plurality of concave-convex portions, forms an OLED on one surface of both surfaces of the substrate on which convex portions and concave portions are formed, and forms an organic solar cell on the other surface. Therefore, there is an advantage that the efficiency can be improved by increasing the specific surface area of OLED and organic solar cell.

The organic solar cell integrated OLED of the present invention is formed by spraying a solution with a nozzle by spraying a solution on the organic thin film layer, and spraying hot gas when the solution is sprayed from the nozzle to volatilize the solvent, thereby making the thickness of the organic thin film layer uniform. It can be formed, there is an advantage that can improve the surface precision of the organic thin film layer.

1 is a cross-sectional view of an organic solar cell integrated OLDE of the present invention.
2 is a partially enlarged cross-sectional view of an organic solar cell integrated OLED of the present invention.
3 is a process flowchart showing an organic solar cell integrated OLED manufacturing process of the present invention.
4 is a process flowchart showing an organic solar cell manufacturing process of the present invention.
5 is a process flowchart showing an OLED manufacturing process of the present invention.
6 is a block diagram of an organic thin film forming apparatus of an organic solar cell integrated OLED of the present invention.
7 is a process flowchart showing a method for forming an organic thin film layer according to the present invention.
8 is a photograph of an organic thin film of an OLED prepared by Example 1. FIG.
9 is a photograph of an organic thin film of the organic solar cell manufactured by Example 2. FIG.
10 is a photograph of an organic thin film of the organic solar cell manufactured by Example 3. FIG.
11 and 12 are enlarged photographs of the surface of the thin film produced by the organic thin film forming apparatus of the present invention and the thin film produced by the conventional spray method.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

1 is a cross-sectional view of an organic solar cell integrated OLED according to an embodiment of the present invention.

Referring to FIG. 1, an organic solar cell integrated OLED according to an embodiment has a three-dimensional structure, a transparent substrate 10 through which light can pass, and an organic solar cell element 20 formed on one surface of the substrate 10. ) And an OLED element 40 formed on the other surface of the substrate 10.

The substrate 10 may be a flexible substrate having flexibility, a glass substrate, a synthetic resin substrate, or the like, and may be formed of a transparent material so that light can be transmitted therethrough.

The substrate 10 has a three-dimensional structure in which the uneven parts 30 and 32 are formed on one surface and the other surface. The concave and convex portions 30 and 32 are in the form of embossing and have convex portions 30 protruding from one surface of the substrate 10 and concave portions 32 concave on the other surface of the substrate 10 . Here, the concave and convex portions 30 and 32 can be manufactured by various methods such as stamper operation, extrusion and injection molding.

The concave and convex portions 30 and 32 are formed in such a manner that a convex portion 30 protrudes on one surface of the substrate 10 and a concave portion is formed on the other surface of the substrate 10 with a height corresponding to the height of the convex portion 30, (10) has a constant thickness.

Here, the concave and convex portions 30 and 32 may be formed in various shapes such as semicircular shape, elliptical shape, and polygonal shape.

The irregularities 30 and 32 may be formed in a shape having a uniform height at regular intervals, and irregular intervals and height may be applied.

As described above, when the concave-convex portions 30 and 32 are formed on the substrate 10, the concave-convex portions 30 and 32 serve to reinforce the strength of the substrate 10, Or the use of a flexible substrate.

Even if the concave and convex portions 30 and 32 are formed on the substrate 10 because the protruding height H1 of the convex portion 30 is equal to the depth H2 in which the concave portion 32 is inserted, The stress can be prevented from being concentrated due to the difference in thickness of the substrate.

As shown in FIG. 2, the organic solar cell device 20 includes an anode electrode 22 formed on the other surface of the substrate 10, an organic thin film layer 24 formed on the anode electrode 22, and an organic thin film layer 24 formed on the anode electrode 22. And a cathode electrode 26 formed on the organic thin film layer 24.

The organic thin film layer 24 is composed of a hole transport layer 24a, a photoactive layer 24b, an electron transport layer 24c, an electron injection layer 24d, and the like.

As the anode electrode 22, a metal oxide including indium tin oxide (ITO) can be used and has a transparent shape.

The hole transport layer 24a is formed between the photoactive layer 24b and the anode electrode 24 by injecting holes generated from the anode electrode 22 and transporting the holes to the photoactive layer 24b. The photoactive layer 24b transports and injects electrons and holes from the light energy into the respective electrodes separately.

The electron transport layer 24c is formed on the photoactive layer 24b as a layer for moving electrons injected into the electron injection layer 24d to the photoactive layer 24b and is transported from the hole transport layer 24a to the photoactive layer 24b It serves to block the transported holes.

The electron injection layer 24d is formed between the cathode electrode 26 and the electron transport layer 24c to allow electrons to flow into the organic solar cell from the cathode electrode 26 more effectively.

Such an organic solar cell device is formed on a substrate having the uneven parts 30 and 32 formed in the same shape as that of the uneven part of the substrate, thereby increasing the specific surface area, thereby improving the efficiency of the organic solar cell.

In addition, the thickness of the organic thin film layer 24 can be made thinner by spraying the solution by spraying to form the organic thin film layer 24, and volatilizing the solvent by spraying the high temperature gas while the solution is flying, And it is possible to form an organic thin film layer having a uniform thickness on the surface of the substrate 10 having the concave and convex portions 30 and 32. [

The OLED element 40 includes an anode electrode 42 formed on one surface of the substrate 10, an organic thin film layer 44 formed on the anode electrode 42, and an organic thin film layer 44. And a cathode electrode 46 to be formed.

The organic thin film layer 44 is composed of a hole transport layer 44a, an organic light emitting layer 44b, an electron transport layer 44c, an electron injection layer 44d, and the like.

Here, the organic thin film layer 44 is formed by spraying the solution from the nozzle in a spray method, and by injecting hot gas when the solution sprayed from the nozzle is in flight to volatilize the solvent contained in the solution.

Therefore, since the OLED device 40 according to the present embodiment is formed in the shape of convex and concave portions identical to those of the convex portion 30 and the concave portion 32 formed on the substrate 10, the specific surface area may be increased to improve efficiency. have.

In addition, the organic thin film layer 44 is formed by spraying a solution from the nozzle in a spray method, and spraying hot gas when the solution sprayed from the nozzle is in flight to volatilize a solvent contained in the solution. The thickness of can be formed uniformly. That is, since the solvent is volatilized while the solution is in flight, the solvent is almost removed from the thin film formed on the substrate, thereby minimizing the flow of the solution applied to the uneven portion, thereby uniformly forming the thickness of the thin film layer.

Thus, the organic solar cell integrated OLED manufacturing process of this invention comprised is demonstrated below.

3 is a process flowchart showing a method of manufacturing an organic solar cell integrated OLED according to an embodiment of the present invention.

First, the substrate 10 is prepared (S100). The substrate 10 may be formed of various substrates such as a flexible substrate, a glass substrate, and a synthetic resin substrate so as to have flexibility. A plurality of three-dimensional concave-convex portions are formed and are formed in a transparent form so that light can be transmitted.

Then, an organic solar cell is formed on one surface of the substrate 10 on which the convex portion 30 is formed (S200).

When the formation of the organic solar cell is completed, the OLED device 40 is formed on the other surface of the substrate 10 on which the concave portion 32 is formed (S300).

4 is a process flow diagram illustrating a method of fabricating an organic solar cell according to an embodiment of the present invention.

First, an anode electrode 22 is formed on one surface of a substrate (S210). The anode electrode 22 is formed of a light transmissive material to allow light to pass therethrough, and a conductive metal material such as a metal oxide such as transparent ITO may be used, and may be formed by a screen printing method, a sputtering method, a vacuum deposition method, or the like.

In operation S220, a hole transport layer 24a is formed on the anode electrode 22. That is, when the solution forming the hole transport layer is sprayed by a spray unit, and the hot gas is injected into the solution in flight by the hot gas injection unit to volatilize the solvent, the organic thin film in which the solvent is almost removed from the surface of the anode electrode 22 is removed. Is applied to form the hole transport layer 24a.

Then, annealing is performed to volatilize the solvent remaining in the applied organic thin film without being removed by the hot gas injection unit. Here, annealing is preferably carried out at 130 DEG C for about 10 minutes.

Then, the photoactive layer 24b is formed on the hole transport layer 24a (S230). Here, the photoactive layer 24b is formed by an organic thin film forming apparatus using a spray method.

That is, when the solution forming the photoactive layer 24b is sprayed by the spray unit, and the hot gas is sprayed on the solution in flight in the hot gas spraying unit to volatilize the solvent, the solvent is almost removed from the surface of the hole transport layer 24a. The organic thin film is applied to form a photoactive layer.

Then, the photoactive layer 24b is annealed. Here, annealing is preferably carried out at 75 DEG C for 24 hours.

The electron transport layer 24c is formed on the photoactive layer 24b. (S240) The electron transport layer 24c may be formed by a vacuum deposition method. In addition, the electron injection layer 24c is coated with an organic ionic material to form an electron injection layer 24d (S250).

Finally, when the conductive metal is deposited on the electron injection layer 24d to form the cathode electrode 26, the manufacturing of the organic solar cell is completed (S260).

5 is a process flowchart showing an OLED manufacturing method of the present invention.

An anode electrode 42 is formed on the other surface of the substrate 10 on which the organic solar cell device 20 is formed (S310). The anode electrode 42 is formed of a light transmitting material so that light can be transmitted, and a conductive metal material such as a transparent metal oxide such as ITO is used. The anode electrode 42 may be formed by a screen printing method, a sputtering method, a vacuum deposition method, or the like.

In operation S320, a hole transport layer 44a is formed on the anode electrode 42. That is, when the solution is sprayed by the spray unit, and the hot gas is sprayed by the spray unit in the hot gas spray unit and sprayed on the flying solution to volatilize the solvent, the organic thin film in which the solvent is almost removed from the surface of the anode electrode 42 is removed. Is applied to form the hole transport layer 44a. Herein, the thickness of the hole transport layer 44a is preferably set to 50 to 150 nm.

Then, annealing is performed to volatilize the solvent remaining in the applied organic thin film without being removed by the hot gas injection unit. Here, annealing is preferably carried out at 130 DEG C for about 10 minutes.

In addition, the organic light emitting layer 44b is formed on the hole transport layer 44a (S330). That is, when the solution is sprayed by the spray unit, and the hot gas is sprayed on the solution in flight by the hot gas spraying unit to volatilize the solvent, the organic thin film having almost the solvent removed thereon is coated on the hole transport layer 44a to form an organic light emitting layer. Form. Here, it is preferable that the thickness of the organic light emitting layer 44b is set to 100-200 nm.

Then, the organic light emitting layer 44b is annealed. Here, annealing is preferably carried out at 75 DEG C for 24 hours.

In addition, the electron transport layer 44c is formed on the organic light emitting layer 44b (S340). The electron transporting layer 44c may be formed by a vacuum deposition method. In addition, an electron injection layer 44d is formed by coating and doping an organic ionic material on the electron transport layer 44c (S350).

Finally, when the conductive metal is deposited on the electron injection layer 44d to form the cathode electrode 46, the manufacture of the OLED is completed (S360).

6 is a block diagram of an organic thin film layer forming apparatus of an organic solar cell integrated OLED according to an embodiment of the present invention.

As shown in FIG. 6, the first thin film forming apparatus 60 is disposed at a predetermined interval on the upper side of the substrate 10, and the second thin film forming apparatus 70 is disposed at a predetermined interval on the lower side of the substrate 10. After the first thin film forming apparatus 60 and the second thin film forming apparatus 70 are operated at the same time, the organic thin film layer 22 of the organic solar cell element 20 and the organic thin film layer of the OLED element 40 ( 44) at the same time.

At this time, since the second thin film forming apparatus 70 has to spray the solution upward from the lower side, the injection pressure is larger than that of the first thin film forming apparatus 60.

The first thin film forming apparatus 60 and the second thin film forming apparatus 70 have the same structure and include spray units 62 and 72 for forming a thin film by spraying a solution on one surface and the other surface of the substrate 10, And a high temperature gas injection unit (64, 74) for injecting a high temperature gas into the solution in a flying state to volatilize the solvent contained in the solution.

As described above, the thin film forming apparatuses 60 and 70 are disposed on the upper surface and the lower surface of the substrate 10, respectively, and are simultaneously operated to form the organic thin film layer on both sides of the substrate at the same time. In addition to this structure, It is also possible to arrange organic thin film layer forming devices on the left and right sides of the substrate and then form the organic thin film layer on both sides of the substrate simultaneously.

7 is a process flowchart illustrating a method of forming an organic thin film layer of an OLED and an organic solar cell according to the present invention.

When the OLED device 20 and the organic solar cell device 40 are manufactured, a spray method is used as a method of forming a hole transport layer or an organic light emitting layer (photoactive layer), which will be described in more detail below.

First, the pressure and temperature of the gas are input (S10). That is, the user inputs the optimum temperature and pressure to volatilize the solvent according to the nature of the solution and the kind of the solvent used.

Here, it is preferable that the pressure of gas is set to 0.04-0.12 Mpa, and gas temperature is 80-150 degreeC.

If the pressure of the gas is 0.06 MPa or less, the gas pressure is so low that volatilization of the solvent is difficult. If the pressure of the gas is 0.12 MPa or more, the gas pressure is too high to prevent the solvent from being injected onto the substrate. If the gas temperature is 80 ° C or lower, the solvent does not volatilize, and if it is 150 ° C or higher, the solute is damaged.

When the pressure and temperature input of the gas is completed, the spray units 62 and 72 are operated to spray the solution on both sides of the substrate 10 (S20). At this time, the substrate 10 may be coated with another layer such as an anode electrode or a hole transport layer.

In the case of the air spray method, the spray units 62 and 72 inject air into the solution to generate the spray pressure.In the case of the electric spray method, the high voltage generator is turned on to apply a high voltage between the spray unit and the substrate 10. The solution is charged, and in the case of a hybrid method, air is sprayed and a high voltage is applied to spray the solution.

Here, the applied voltage between the spray units 62 and 72 and the substrate 10 is set to 8 to 14 kV, the distance between the spray unit and the substrate is 6 to 12 cm, and the discharge amount is set to 40 to 1000ul / min.

When the solution is injected and sprayed from the spray units 62 and 72 before it reaches the substrate 10, the high-temperature gas injection units 64 and 74 inject the high-temperature gas to the solution, The solvent is volatilized (S30).

Then, the substrate 10 is heated to a relatively low temperature to finally evaporate the remaining solvent that can not be removed by the hot gas injection units 64 and 74.

Here, since the heating temperature of the substrate 10 is 70 to 190 占 폚, it can be heated to a comparatively low temperature, so that various substrates such as a flexible substrate, a weak substrate, and a thin substrate can be used, Thereby being prevented from being damaged by this heat.

As described above, in this embodiment, since the organic thin film layer is formed by spraying the solution onto the substrate by the spraying method, the thickness of the organic thin film layer can be made thin and the thickness of the organic thin film layer can be freely adjusted.

In addition, in this embodiment, since the solution is sprayed by the spraying method, the surface of the substrate 10 having the three-dimensional curvature can be evenly coated on the entire surface.

Example 1

Embodiment 1 in which an OLED element is formed on the other surface of the substrate 10 will be described below.

As the OLED light emitting layer, poly (9-vinylcabazole), PBD (2- (4-Biphenylyl) -5-phenyl-1,3,4-oxadiazole), Ir (ppy) ] iridium (III) were mixed in a ratio of 10: 4: 1 and dissolved in monochlorobenzene at a ratio of 0.2 wt% to prepare a spray solution.

The solution thus prepared was filtered using a 6-μm, 0.4-μm syringe filter, and then a nano-envelope was prepared using a hybrid spray-type organic thin-film forming apparatus in which electric spraying and air jetting were mixed.

That is, the applied voltage 10kV, nitrogen pressure 0.06Mpa, the distance between the injection nozzle and the substrate 6cm, discharge amount 88ul / min, substrate temperature 130 ℃, gas temperature 100 ℃, the spray solution is sprayed in the spray unit and at the same time hot gas The nano organic thin film was formed on the surface of the substrate having a three-dimensional curvature by spraying a hot gas (100 ℃) to the solution in flight in the injection unit. And the organic thin film sprayed on the board | substrate was processed for 24 hours using the 75 degreeC drying furnace, and crosslinking progressed.

In the nano-organic thin film prepared by Example 1, the thickness of the nano-organic thin film was measured after scanning electron microscope, as shown in the photograph shown in Figure 8, the top thickness was 133nm, the side ( Side thickness was 117 nm and bottom thickness was 123 nm. Thus, the ratio of Top / Bottom was 1.18 and the ratio of Side / Bottom was 0.95.

As in Example 1, when the organic thin film forming apparatus using the spray method of the present invention on the surface of the substrate having a three-dimensional curvature can be obtained an organic thin film having a uniform thickness as a whole, it is possible to lower the heating temperature of the substrate I can confirm that there is.

Example 2

Embodiment 2 of manufacturing an organic solar cell on one surface of the substrate 10 will be described below.

The OPV photoactive layer was prepared by mixing PCBM (1- (3-Methoxycarbonyl) -Propyl-1-phenyl = (6,6) C61) with P3HT (Poly (3-hexylthiophene) in a ratio of 1: 1 to obtain monochlorobenzene ) At a ratio of 0.2 wt%, respectively.

The solution thus prepared was filtered using a 6-μm, 0.4-μm syringe filter, and then a nano-envelope was prepared using a hybrid spray-type organic thin-film forming apparatus in which electric spraying and air jetting were mixed.

That is, the applied voltage 10kV, nitrogen pressure 0.06Mpa, the distance between the injection nozzle and the substrate 6cm, discharge amount 350ul / min, substrate temperature 130 ℃, gas temperature 120 ℃ to set the spray solution from the spray unit and at the same time hot gas The hot organic gas (120 ° C.) was injected into the solution in flight from the injection unit to form a nano organic thin film on the surface of the substrate having three-dimensional curvature. And the organic thin film sprayed on the board | substrate was processed for 24 hours using the 75 degreeC drying furnace, and crosslinking progressed.

In the nano-organic thin film prepared by Example 2, the thickness of the nano-organic thin film was measured after scanning electron microscope, as shown in the photograph shown in Figure 9, the top (Top) thickness was 595nm, the side ( Side) thickness was 560nm, and bottom thickness was 551nm. Therefore, the ratio of Top / Bottom was 1.07, and the ratio of Side / Bottom was 1.02.

As in Example 2, if the organic thin film forming apparatus using the spray method of the present invention on the surface of the substrate having a three-dimensional curvature can be obtained an organic thin film having a uniform thickness as a whole, it is possible to lower the heating temperature of the substrate I can confirm that there is.

Example 3

Embodiment 3 of manufacturing an organic solar cell on one surface of the substrate 10 will be described below.

As an OPV photoactive layer, PCBM (1- (3-Methoxycarbonyl) -Propyl-1-phenyl = (6,6) C61) and P3HT (Poly (3-hexylthiophene) were mixed at a ratio of 1: 1 to chloroform. Each melted at a rate of 0.15 wt% to prepare a spray solution.

The solution thus prepared was filtered using a 6-μm, 0.4-μm syringe filter, and then a nano-envelope was prepared using a hybrid spray-type organic thin-film forming apparatus in which electric spraying and air jetting were mixed.

In other words, the applied voltage 10kV, nitrogen pressure 0.06Mpa, the distance between the injection nozzle and the substrate 6cm, discharge amount 350ul / min, substrate temperature 70 ℃, gas temperature 90 ℃, the spray solution is sprayed in the spray unit and at the same time hot gas The hot organic gas (90 ° C.) was injected into the solution in flight from the injection unit to form a nano organic thin film on the surface of the substrate having three-dimensional curvature. And the organic thin film sprayed on the board | substrate was processed for 24 hours using the 75 degreeC drying furnace, and crosslinking progressed.

In the nano-organic thin film prepared by Example 3, the thickness of the nano-organic thin film was measured after scanning electron microscope, as shown in the photograph shown in Figure 10, the top thickness was 130nm, the side ( Side) thickness was 145nm and bottom thickness was 144nm. Therefore, the ratio of Top / Bottom was 0.90, and the ratio of Side / Bottom was 1.01.

As in Example 3, when the organic thin film forming apparatus using the spray method of the present invention is manufactured on the surface of a substrate having three-dimensional curvature, an organic thin film having a uniform thickness as a whole can be obtained, and the heating temperature of the substrate can be lowered. I can confirm that there is.

11 and 12 are enlarged photographs of the surface of the thin film produced by the organic thin film forming apparatus of the present invention and the thin film produced by the conventional spray method.

As shown in FIG. 11, when a thin film is formed by spraying a solution onto the surface of a substrate using a conventional spraying method and the solvent contained in the solution is volatilized by heating the substrate to 200 ° C, State, and heat damage to the solute can be confirmed.

As shown in FIG. 12, when a solvent is volatilized using a high temperature gas, the temperature of the substrate can be relatively low, such as about 130 ° C., so that the surface of the substrate is smoothly formed, .

 While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

10: substrate 20: organic solar cell element
22, 42 anode electrode 26, 46 cathode electrode
24a, 44a: hole transport layer 24b: photoactive layer
44b: organic light emitting layer 24c, 44c: electron transport layer
24d and 44d: electron injection layer 30: convex portion
32: concave

Claims (13)

A substrate having a convex portion formed on one surface thereof and a concave portion formed on the other surface thereof;
An OLED element formed on one surface of the substrate; And
Organic solar cell integrated OLED comprising an organic solar cell element formed on the other surface of the substrate. The method of claim 1,
The substrate may be any one of a flexible substrate, a glass substrate and a synthetic resin substrate, the organic solar cell integrated OLED, characterized in that the light is formed to be transparent. The method of claim 1,
The height H1 protruding from the convex portion and the depth H2 of the concave portion are formed to be the same, and the overall thickness of the substrate is formed to be constant. The method of claim 1,
The OLED device includes an anode electrode formed on a substrate, a plurality of organic thin film layers formed on the anode electrode, and a cathode electrode formed on the plurality of organic thin film layers,
The plurality of organic thin film layers of the organic solar cell integrated OLED comprising a hole transport layer, an organic light emitting layer, an electron transport layer and an electron injection layer. The method of claim 1,
Wherein the organic solar cell element comprises an anode electrode formed on a substrate, a plurality of organic thin film layers formed on the anode electrode, and a cathode electrode formed on the plurality of organic thin film layers,
The plurality of organic thin film layer is an organic solar cell integrated OLED, characterized in that it comprises a hole transport layer, a photoactive layer, an electron transport layer and an electron injection layer. 6. The method according to any one of claims 4 to 5,
At least one of the plurality of organic thin film layers injects a solution in a spray unit, and the organic solar cell integrated OLED, characterized in that the solvent in the solution by injecting a hot gas to the solution in flight is injected from the hot gas injection unit . The method according to claim 6,
And an organic thin film layer of the organic solar cell element formed on one side of the substrate and an organic thin film layer of the OLED element formed on the other side of the substrate. Preparing a substrate on which a convex portion is formed on one surface and a concave portion is formed on the other surface;
Forming an OLED on one surface of the substrate on which the convex portion is formed; And
Organic solar cell integrated OLED manufacturing method comprising the step of forming an organic solar cell element on the other surface of the substrate on which the recess is formed. 9. The method of claim 8,
The forming of the OLED device may include forming an anode electrode on one surface of the substrate;
Forming a plurality of organic thin film layers on the anode; And
Forming a cathode on the organic thin film layer;
The forming of the plurality of organic thin film layers is an organic solar cell integrated OLED manufacturing method, characterized in that to sequentially form a hole transport layer, an organic light emitting layer, an electron transport layer and an electron injection layer. 9. The method of claim 8,
The forming of the organic solar cell device may include forming an anode electrode on one surface of the substrate;
Forming a plurality of organic thin film layers on the anode; And
Forming a cathode on the organic thin film layer;
The forming of the plurality of organic thin film layers is an organic solar cell integrated OLED manufacturing method, characterized in that to sequentially form a hole transport layer, a photoactive layer, an electron transport layer and an electron injection layer. 11. The method according to any one of claims 9 to 10,
Forming the plurality of organic thin film layers
Setting the pressure and temperature of the gas according to the type of the solvent contained in the spraying solution;
Spraying a solution onto a substrate in a spray unit; And
The organic solar cell integrated OLED manufacturing method comprising the step of injecting a hot gas to the solution being sprayed in flight to volatilize the solvent contained in the solution. 12. The method of claim 11,
The gas pressure is 0.06 ~ 0.12MPa, the gas temperature is 80 ~ 150 ℃ organic solar cell integrated OLED manufacturing method, characterized in that. 12. The method of claim 11,
Further comprising the step of spraying the solution onto the substrate and then heating the substrate to volatilize the solvent remaining in the solution,
The heating temperature of the substrate is an organic solar cell integrated OLED manufacturing method, characterized in that 70 ~ 190 ℃.

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