JP2005302566A - Organic EL element manufacturing method, organic EL element, and electronic apparatus - Google Patents

Abstract

An object of the present invention is to provide a method for manufacturing an organic EL element capable of constructing a laminated structure of organic EL elements by a simple wet manufacturing process without considering the solubility of organic materials and organic solvents. And
In a method of manufacturing an organic EL element having an organic layer sandwiched between a first electrode, a second electrode, and the first electrode and the second electrode, the first organic material A first organic layer forming step of forming a first organic layer by disposing a liquid material on a substrate, and a surface of the first organic layer superimposed on a surface of a photocrosslinking material applied on a substrate After the mounting, a surface modification step of irradiating light to photocrosslink the surface of the first organic layer to insolubilize it in an organic solvent, and on the first organic layer whose surface is photocrosslinked And a second organic layer forming step of forming a second organic layer by arranging a liquid obtained by dissolving the second organic material in an organic solvent.
[Selection] Figure 1

Description

  The present invention relates to a method for manufacturing an organic EL element, an organic EL element, and an electronic apparatus, and more particularly to a method for manufacturing an organic EL element, an organic EL element, and an electronic apparatus for producing an organic EL element by a wet method.

  Organic EL elements are light-emitting elements that have the characteristics of being thin, all-solid-state, planar self-luminous, and high-speed response, and are expected to be applied to flat display panels and backlights. Research has been conducted. In the past, organic EL elements were significantly inferior to inorganic EL elements using inorganic substances, but since 1987 Kodak's Tang et al. Announced a method for stacking organic layers [C . W. Tang and S.M. A. Vanslyke: Appl. Lett. , 51 (1987) 913] Device characteristics have been improved and rapidly developed. In recent years, products using organic EL elements for display panels have been released. The organic EL element has a structure in which a plurality of thin films containing an organic material are sandwiched between a first electrode and a second electrode, and light is emitted by recombination of carriers injected from the two electrodes in the organic thin film. It is an element to do.

  When manufacturing a laminated organic EL element by a wet method, there is a method of using a difference in solubility between organic thin films formed from a water-soluble and a fat-soluble solution. Specifically, for example, the hole injection / transport layer is formed by applying a water-soluble solution such as PEDOT or PANI on the anode. PEDOT and PANI thin films are insoluble in solvents such as xylene and toluene. Next, a light-soluble layer in which an organic EL material is dissolved in a solvent such as xylene or toluene is applied to form a light emitting layer. As the water-soluble conductive polymer, materials that can be used such as thiophene, aniline, and pyrrole are limited.

  Further, in Patent Document 1, the light emitting layer is formed in a solution state dissolved in an organic solvent, and then the hole blocking layer is formed in an organic solvent having a solubility parameter outside the solubility range with respect to the organic matter constituting the light emitting layer. A technique is disclosed in which a solution-state hole blocking layer obtained by dissolving an organic material to be formed is stacked on a solution-state light-emitting layer positioned on the anode side with respect to the hole blocking layer.

JP 2002-319487 A

  However, in the prior art, since it is necessary to select and use an organic layer and a solvent that does not dissolve the organic layer, there is a problem that combinations of usable organic materials and solvents are limited. For example, even an organic material having excellent characteristics may not be used because there is no insoluble solvent, and the range of selection of the organic material becomes narrow.

  The present invention has been made in view of the above problems, and is an organic material capable of constructing a laminated structure of organic EL elements by a simple wet manufacturing process without considering the solubility of organic materials and solvents. It is an object to provide a method for manufacturing an EL element.

  In order to solve the above problems and achieve the above object, the present invention provides a first electrode, a second electrode, and an organic layer sandwiched between the first electrode and the second electrode. In a method for manufacturing an organic EL device, a first organic layer forming step of forming a first organic layer by disposing a liquid material of a first organic material on a substrate, and a photocrosslinking material applied on a substrate A surface modification step in which the surface of the first organic layer is placed on the surface of the substrate, and then light-irradiated to photocrosslink the surface of the first organic layer and insolubilize in the organic solvent. The second organic layer is formed by disposing a liquid material obtained by dissolving a second organic material in an organic solvent on the first organic layer whose surface is photocrosslinked. And a process.

  Thus, after the surface of the first organic layer is photocrosslinked and insolubilized in the organic solvent, a liquid material in which the second organic layer material is dissolved in the organic solvent is formed on the first organic layer. Since the first organic layer does not dissolve in the organic solvent, the second organic layer can be suitably stacked, and the solubility of the organic material and the solvent is taken into consideration. In addition, it is possible to construct a laminated structure of organic EL elements with a simple wet manufacturing process. In addition, since only the surface of the first organic layer is modified by photocrosslinking, the function of the first organic layer is not deteriorated.

  According to a preferred aspect of the present invention, it is desirable that the first organic layer is a hole injection / transport layer and the second organic layer is a light emitting layer. Thereby, the laminated structure of the hole injection / transport layer and the light emitting layer can be constructed by a simple wet manufacturing process.

  According to a preferred aspect of the present invention, it is desirable that the first organic layer is a light emitting layer and the second organic layer is an electron transport layer. Thereby, the laminated structure of a light emitting layer and an electron carrying layer can be constructed | assembled with a simple wet manufacturing process.

  According to a preferred aspect of the present invention, in the surface modification step, it is desirable to pressurize the substrate on which the first organic layer is formed on the substrate. Thereby, the first organic layer and the photocrosslinking material are sufficiently adhered, and the photocrosslinking efficiency of the surface of the first organic layer can be increased.

  In order to solve the above-described problems and achieve the object, the present invention provides an organic layer sandwiched between the first electrode, the second electrode, and the first electrode and the second electrode. A first organic layer forming step of forming a first organic layer by disposing a liquid material of a first organic material on the first electrode, and applying the coating on the substrate After the surface of the first organic layer is placed on the surface of the photocrosslinked material, the surface of the first organic layer is photocrosslinked by irradiating light. A first surface modification step for insolubilizing the surface with an organic solvent, and a second organic material dissolved in the first predetermined organic solvent on the first organic layer whose surface is photocrosslinked A second organic layer forming step of forming the second organic layer by disposing the liquid material, and the surface of the photocrosslinking material applied on the substrate After the surface of the second organic layer is placed on top of each other, the surface of the second organic layer is photocrosslinked by irradiating light to insolubilize the surface of the second organic layer in an organic solvent. A second surface modification step, and a liquid obtained by dissolving a third organic material in an organic solvent is disposed on the second organic layer whose surface is photocrosslinked to form a third organic layer And a third organic layer forming step for forming the layer.

  Thus, after the surface of the first organic layer is photocrosslinked and insolubilized in the organic solvent, a liquid material in which the second organic layer material is dissolved in the organic solvent is formed on the first organic layer. Since the first organic layer does not dissolve in the organic solvent, the second organic layer can be suitably stacked. In addition, after the surface of the second organic layer is photocrosslinked and insolubilized in the organic solvent, a liquid material in which the third organic layer material is dissolved in the organic solvent is disposed on the second organic layer. Therefore, the second organic layer does not dissolve in the organic solvent, and the third organic layer can be suitably stacked. As a result, it is possible to construct a laminated structure of organic EL elements by a simple wet manufacturing process without considering the solubility of the organic material and the solvent.

  According to a preferred aspect of the present invention, the first organic layer is a hole injection / transport layer, the second organic layer is a light emitting layer, and the third organic layer is an electron. A transport layer is desirable. Thereby, a laminated structure of the hole injection / transport layer, the light emitting layer, and the electron transport layer can be constructed by a simple wet manufacturing process.

  Moreover, according to the preferable aspect of this invention, it is desirable for the organic EL element to be manufactured with the manufacturing method of the organic EL element of this invention. Thereby, the organic EL element manufactured with the simple wet manufacturing process can be provided, without considering the solubility of an organic material and a solvent.

  Moreover, according to the preferable aspect of this invention, it is desirable to mount the organic EL element of this invention in an electronic device. Thereby, an electronic device equipped with an organic EL element manufactured by a simple wet manufacturing process can be provided without considering the solubility of the organic material and the solvent.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

  FIG. 1 is a cross-sectional view showing a main part of a configuration of an organic EL element 100 according to Example 1 of the present invention. The organic EL element 100 has an anode (first electrode) 102 and a cathode (second electrode) 105 on a base 101, and an organic layer is provided between the anode 102 and the cathode 105. is there. The organic layer is configured by laminating a hole injection / transport layer 103 and a light emitting layer 104. The organic EL element 100 is of a bottom emission type in which light emitted from the light emitting layer 104 is emitted from the substrate side.

  The substrate 101 is configured by forming drive elements (not shown) made of TFT elements, various wirings (not shown), etc. on a transparent substrate (not shown) such as a glass substrate. In addition, the anode 102 is formed on various wirings through an insulating layer or a planarizing film.

  The anode 102 is formed by patterning on the substrate 101 and is connected to a driving element made of a TFT element and the various wirings. In this embodiment, the anode 102 is made of ITO (Indium Tin Oxide). .

  The hole injection / transport layer 103 is formed on the entire surface of the substrate 101 on which the anode 102 is formed. The hole injection / transport layer 103 transports holes injected from the anode 102 to the light emitting layer 104. As a material for forming the hole injection / transport layer 103, arylamine derivatives, phthalocyanine derivatives, polyaniline derivatives + organic acids, polythiophene derivatives + polymer acids, and the like can be used.

  The light emitting layer 104 is formed on the hole injecting / transporting layer 103, and the electrons injected from the cathode 105 and the holes injected from the hole injecting / transporting layer 103 are combined to have a wavelength of a predetermined band. Emits light. Specific examples of the material of the light emitting layer 104 include polyfluorene derivatives (PF), (poly) paraparaphenylene vinylene derivatives (PPV), polyparaphenylene derivatives (PPP), polyvinyl carbazole (PVK), polythiophene derivatives, and premethyl. A polymer organic material such as polysilane such as phenylsilane (PMPS) is preferably used.

  In addition, these high molecular organic materials include high molecular organic materials such as penylene dyes, coumarin dyes, rhodamine dyes, rubrene, perylene, 9,10-diphenylanthracene, tetraphenylbutadiene, Nile red, coumarin 6, A low molecular organic material such as quinacridone can also be used by doping.

  The cathode 105 is formed by laminating a LiF layer, a Ca layer, and an Al layer on the light emitting layer 104. A sealing layer (not shown) is formed on the cathode 105.

  A method of manufacturing the organic EL element 100 having the above configuration will be described with reference to FIG. FIG. 2 is an explanatory diagram for explaining a manufacturing process of the organic EL element 100.

[Substrate processing process]
In the same manner as in the prior art, TFT elements and various wirings are formed on a glass substrate 101, and further, an interlayer insulating layer and a planarizing film are formed, and then ITO is formed by vapor deposition, and further patterned. Thus, the anode 102 is formed. As a result, the anode 102 is formed on the substrate 101 as shown in FIG. Thereafter, after cleaning the substrate on which the anode 102 is formed, oxygen plasma treatment is performed at atmospheric pressure to modify the substrate surface to be hydrophilic. Thereby, the work function of the anode 102 can be raised.

[Hole injection / transport layer formation process]
Next, a liquid material in which the hole injection / transport layer material is dissolved or dispersed in a solvent or dispersion medium is formed on the entire surface of the substrate 101 on which the anode 102 is formed to a predetermined film thickness by spin coating. As shown in FIG. 2B, the hole injection / transport layer 103 is formed. Thereafter, the surface of the hole injection / transport layer 103 is modified. First, the substrate 101 on which the hole injection / transport layer 103 is formed is inverted, and the hole injection / transport layer is formed on the surface of the photocrosslinking material 120 applied to the substrate 110 as shown in FIG. The surface of 103 is overlapped, and light is irradiated while pressurizing the substrate 101 with a pressurizing mechanism (not shown). As a result, the surface 103a of the hole injection / transport layer 103 can be photocrosslinked and modified and insolubilized in the organic solvent.

[Light emitting layer forming step]
Next, a liquid material in which a light emitting layer material is dissolved in a solvent is formed on the surface-modified hole injection / transport layer 103 with a predetermined film thickness by a spin coating method, and then a baking treatment is performed to remove the solvent. By evaporating, as shown in FIG. 2-5, the light emitting layer 104 is formed.

[Cathode formation process]
Next, LiF, Ca, and Al are sequentially stacked on the light-emitting layer 104 by a vacuum deposition method to form a cathode 105 composed of a LiF layer, a Ca layer, and an Al layer, as shown in FIG. 2-6.

(Experimental example 1)
[Substrate processing process]
A TFT element and various wirings are formed on a substrate 101 made of glass, and further, an interlayer insulating layer and a flattening film are formed. Then, ITO is formed by vapor deposition or the like, and further, an anode 102 is formed by patterning. did. Thereafter, after cleaning the substrate on which the anode 102 was formed, oxygen plasma treatment was performed at atmospheric pressure to modify the substrate surface to be hydrophilic.

[Hole injection / transport layer formation process]
Next, the substrate 101 on which the anode 102 is formed is spin-coated with a liquid material in which the hole injection / transport layer material shown in [Chemical Formula 1] is dissolved in chloroform at a concentration of 1.5 wt% to form a 50 nm thin film. Then, a hole injection / transport layer 103 was formed. Thereafter, the substrate 101 on which the hole injection / transport layer 103 is formed is inverted, and holes are formed on the surface of the photocrosslinking material 120 containing aromatic bisazide (photocrosslinking initiator) applied to the substrate 120. The surface of the injection / transport layer 103 was overlapped, and ultraviolet rays were irradiated in a nitrogen atmosphere while pressing the substrate 101 with a pressurization mechanism (not shown). As a result, the surface 103a of the hole injection / transport layer 103 is photocrosslinked and modified, and a layer insoluble in organic solvents such as toluene, xylene, chloroform, methylene chloride, dichloroethane, and THF can be formed. It was. It was confirmed that the same effect was obtained when the hole injection / transport layer material represented by [Chemical Formula 2] was used.

[Light emitting layer formation]
A hole injecting / transporting layer formed of the hole injecting / transporting layer material of [Chemical Formula 1] by spin coating a liquid material obtained by dissolving the light emitting layer material shown in [Chemical Formula 3] in 1.5 wt% chloroform. A film having a thickness of about 80 nm was formed on the surface of 103. At this time, the hole injection / transport layer 103 was not compatible. Thereafter, baking treatment was performed at 130 ° C. for 30 minutes in a nitrogen atmosphere, and the light emitting layer 104 was formed on the hole injection / transport layer 103. It was confirmed that the same effect was obtained when the light emitting layer material shown in [Chemical Formula 4] was used instead of the light emitting layer material shown in [Chemical Formula 3].

[Cathode formation]
On the light emitting layer 104, the vacuum degree of the vacuum evaporation apparatus was set to 10 ⁻⁷ to 10 ⁻⁸ Torr, and LiF 4 nm, Ca 10 nm, and Al 200 nm were stacked in this order to form the cathode 103. As a result, an organic EL element with high emission luminance was obtained.

  As described above, according to the first embodiment, the surface of the hole injection / transport layer 103 formed on the substrate 101 is placed on the surface of the photocrosslinking material 120 applied on the substrate 110, and the predetermined amount is set. After irradiation with light for a time, the surface of the hole injection / transport layer 103 was photocrosslinked and insolubilized in the solvent, and then the light emitting layer forming material was dissolved in the solvent on the hole injection / transport layer 103 Since the liquid material is applied, the hole injection / transport layer 103 does not dissolve in the solvent, and the light emitting layer 105 can be suitably stacked, taking into consideration the solubility of the organic material and the solvent. Therefore, it is possible to construct a laminated structure of organic EL elements in a simple wet manufacturing process. In addition, materials that can be used as the hole injection / transport layer material as the organic EL device produced by the wet method were limited to water-soluble materials such as PEDOT, polythiophene, and polyaniline, but according to this example, It becomes possible to use a material soluble in an organic solvent, and the range of material selection can be expanded.

  Further, since only the outermost surface of the hole injection / transport layer 103 is modified by photocrosslinking, the hole injection / transport layer 103 has functions such as a hole injection / transport function and an electron blocking function. Can be prevented.

  Further, since the substrate 101 on which the hole injection / transport layer 103 is formed is pressed against the substrate 110 on which the photocrosslinking material 120 is applied, the hole injection / transport layer 103 and the photocrosslinking material are Adhering sufficiently, the efficiency of the photoreaction on the surface of the hole injection / transport layer can be increased.

  FIG. 3 is a cross-sectional view of a main part showing the configuration of the organic EL element 200 according to the embodiment of the present invention. 3, parts having the same functions as those in FIG. 1 are denoted by the same reference numerals, and description of common parts is omitted.

  The organic EL element 200 of Example 2 has a configuration in which the electron transport layer 201 is laminated on the light emitting layer 104. The electron transport layer 201 has a function of transporting electrons injected from the cathode 105 to the light emitting layer 104 and blocking holes and excitons that have moved from the anode 102 side. As a material for the electron transport layer 201, an organic material such as an aluminum complex, an oxadiazole derivative, a triazole derivative, or a phenanthroline derivative can be used.

  A method of manufacturing the organic EL element 200 having the above configuration will be described with reference to FIG. FIG. 4 is an explanatory diagram for explaining a manufacturing process of the organic EL element 200.

[Substrate processing process]
A TFT element and various wirings are formed on a substrate 101 made of glass, and further, an interlayer insulating layer and a flattening film are formed. Then, ITO is formed by vapor deposition or the like, and further, an anode 102 is formed by patterning. To do. As a result, an anode 102 is formed on the substrate 101 as shown in FIG. Thereafter, after cleaning the substrate on which the anode 102 is formed, oxygen plasma treatment is performed at atmospheric pressure to modify the substrate surface to be hydrophilic. Thereby, the work function of the anode 102 can be raised.

[Hole injection / transport layer formation process]
Next, a liquid material in which the hole injection / transport layer material is dissolved or dispersed in a solvent or dispersion medium is formed on the entire surface of the substrate 101 on which the anode 102 is formed to a predetermined film thickness by spin coating. As shown in FIG. 4B, the hole injection / transport layer 103 is formed. Thereafter, the surface of the hole injection / transport layer 103 is modified. First, the substrate 101 on which the hole injection / transport layer 103 is formed is inverted, and the hole injection / transport layer 103 is formed on the surface of the photocrosslinking material 120 applied to the substrate 110 as shown in FIG. The light is irradiated while pressing the substrate 101 with a pressing mechanism (not shown). As a result, the surface 103a of the hole injection / transport layer 103 was photocrosslinked and modified, and a layer insoluble in the organic solvent could be formed.

[Light emitting layer forming step]
Next, on the surface-modified hole injection / transport layer 103, a liquid material in which a light emitting layer material is dissolved in a solvent is formed with a predetermined film thickness by a spin coating method, and then the solvent is evaporated, As shown in 4-5, the light emitting layer 104 is formed. Thereafter, the surface of the light emitting layer 104 is modified. First, the substrate 101 on which the light emitting layer 104 is formed is inverted, and the surface of the light emitting layer 104 is overlapped with the surface of the photocrosslinking material 120 applied to the substrate 110 as shown in FIG. While the substrate 101 is pressed by the pressurizing mechanism, light is irradiated. Thereby, the surface 104a of the light emitting layer 104 is photocrosslinked and modified, and a layer insoluble in the organic solvent can be formed.

[Electron transport layer formation process]
On the surface-modified light-emitting layer 104, a liquid material in which an electron transport layer forming material is dissolved in a solvent is spin-coated to form a film having a predetermined thickness, and then a baking process is performed. As shown, an electron transport layer 201 is formed.

[Cathode formation process]
Next, LiF, Ca, and Al are sequentially stacked on the electron transport layer 201 by a vacuum deposition method, thereby forming a cathode 105 composed of a LiF layer, a Ca layer, and an Al layer, as shown in FIG.

(Experimental example)
[Substrate processing process]
A TFT element and various wirings are formed on a substrate 101 made of glass, and further, an interlayer insulating layer and a flattening film are formed. Then, ITO is formed by vapor deposition or the like, and further, an anode 102 is formed by patterning. To do. Thereafter, after cleaning the substrate on which the anode 102 is formed, oxygen plasma treatment is performed at atmospheric pressure to modify the substrate surface to be hydrophilic.

[Hole injection / transport layer formation process]
Next, the substrate on which the cathode 102 is formed is spin-coated with a liquid material in which the hole injection / transport layer material shown in [Chemical Formula 1] is dissolved in chloroform at a concentration of 1.5 wt%, and a 50 nm thin film is formed. Formed. Thereafter, the substrate 101 on which the hole injection / transport layer material shown in [Chemical Formula 1] is formed is inverted, and the photocrosslinking material containing aromatic bisazide (photocrosslinking initiator) applied to the substrate 110 is used. The surface of the hole injection / transport layer 103 is superposed on the surface of 120, and ultraviolet rays are irradiated for a predetermined time in a nitrogen atmosphere while pressurizing the substrate 101 with a pressurizing mechanism (not shown). As a result, the surface 103a of the hole injection / transport layer 103 is photocrosslinked and modified, and a layer insoluble in an organic solvent such as toluene, xylene, chloroform, methylene chloride, dichloroethane, and THF is formed to have a thickness of about several nm. I was able to.

[Light emitting layer formation]
A liquid in which the light emitting layer material shown in [Chemical Formula 3] is dissolved in 1.5 wt% chloroform is spin-coated to form a hole injection / transport layer formed of the hole injection / transport layer material shown in [Chemical Formula 1]. A light emitting layer 104 was formed by forming a film with a thickness of about 80 nm on the surface of the layer 103. At this time, the hole injection / transport layer 103 was not compatible. Thereafter, the substrate 101 on which the light-emitting layer 104 is formed is inverted, and then the substrate 101 on which the light-emitting layer 104 is formed is inverted, and an aromatic bisazide (photocrosslinking initiator) applied to the substrate 110. The surface of the hole injection / transport layer 103 is superimposed on the surface of the photocrosslinking material 120 containing), and ultraviolet rays are irradiated while pressing the substrate 101 with a pressurizing mechanism (not shown). As a result, the surface 104a of the light-emitting layer 104 was photocrosslinked and modified, and a layer insoluble in an organic solvent such as toluene, xylene, chloroform, methylene chloride, dichloroethane, and THF could be formed to a few nm. .

[Electron transport layer formation process]
A liquid material in which the electron transport material shown in [Chemical Formula 5] was dissolved in toluene was formed on the light-emitting layer 104. At this time, the light emitting layer 104 formed of the light emitting layer material shown in [Chemical Formula 3] was not compatible. Thereafter, a baking treatment was performed at 130 ° C. for 30 minutes in a nitrogen atmosphere, and the electron transport layer 201 was formed over the light-emitting layer 104.

[Cathode formation]
The vacuum reach of the vacuum deposition apparatus was 10 ⁻⁷ to 10 ⁻⁸ Torr, and LiF 4 nm, Ca 10 nm, and Al 200 nm were stacked in this order to form the cathode 103. As a result, an organic EL element with high emission luminance was obtained.

  As described above, according to the second embodiment, the surface of the light emitting layer 104 formed on the substrate 101 is placed on the surface of the photocrosslinking material 120 applied to the substrate 110, and light is applied for a predetermined time. The surface of the light emitting layer 104 is photocrosslinked and modified to be insolubilized in an organic solvent, and then a liquid material in which an electron transport layer material is dissolved in the organic solvent is applied on the light emitting layer 104. Therefore, the light emitting layer 104 does not dissolve in the organic solvent, the electron transport layer 201 can be suitably stacked, and it is simple without considering the solubility of the organic material and the organic solvent. It is possible to construct a laminated structure of an organic EL element composed of a hole injection / transport layer, a light emitting layer, and an electron transport layer by a simple wet manufacturing process.

  In the first and second embodiments, the bottom emission type organic EL element has been described. However, a top emission type may be used. In addition, the present invention is not limited to the first embodiment and the second embodiment, and these embodiments can be implemented in combination.

(Application example to electronic equipment)
Next, a specific example of an electronic apparatus to which the organic EL element according to the present invention can be applied will be described with reference to FIG. FIG. 5A is a perspective view showing an example in which the organic EL element according to the present invention is applied to a display unit of a portable personal computer (so-called notebook personal computer) 300. As shown in the figure, the personal computer 300 includes a main body 302 provided with a keyboard 301 and a display unit 303 to which the organic EL element according to the present invention is applied. FIG. 5B is a perspective view illustrating an example in which the organic EL element according to the present invention is applied to the display unit of the mobile phone 400. As shown in the figure, the cellular phone 400 includes a plurality of operation buttons 401, a receiving mouth 402, a mouthpiece 403, and a display unit 404 to which the organic EL element according to the present invention is applied.

  The organic EL device according to the present invention includes a portable information device called PDA (Personal Digital Assistants), a personal computer, a workstation, a digital still camera, an in-vehicle monitor, a digital video camera, in addition to the above-described mobile phone and laptop computer. The present invention can be widely applied to electronic devices such as televisions, viewfinder type, monitor direct view type video tape recorders, car navigation devices, pagers, electronic notebooks, calculators, word processors, workstations, video phones, and POS terminals.

  The organic EL element of the present invention can be widely used in organic EL display devices, electrochromic glass, electronic paper, lighting devices, printer heads, and the like. The electronic device according to the present invention includes a mobile phone, a portable information device called PDA (Personal Digital Assistants), a portable personal computer, a personal computer, a workstation, a digital still camera, an in-vehicle monitor, a digital video camera, and a television. It can be widely used in electronic devices such as a viewfinder type, monitor direct view type video tape recorder, car navigation device, pager, electronic notebook, calculator, word processor, video phone, and POS terminal.

FIG. 3 is a cross-sectional view of a main part showing the configuration of the organic EL element according to Example 1. FIG. 3 is an explanatory diagram for explaining a manufacturing process of the organic EL element according to Example 1. FIG. 3 is an explanatory diagram for explaining a manufacturing process of the organic EL element according to Example 1. FIG. 3 is an explanatory diagram for explaining a manufacturing process of the organic EL element according to Example 1. FIG. 3 is an explanatory diagram for explaining a manufacturing process of the organic EL element according to Example 1. FIG. 3 is an explanatory diagram for explaining a manufacturing process of the organic EL element according to Example 1. FIG. 3 is an explanatory diagram for explaining a manufacturing process of the organic EL element according to Example 1. FIG. 6 is a cross-sectional view of a principal part showing a configuration of an organic EL element according to Example 2. Explanatory drawing for demonstrating the manufacturing process of the organic EL element which concerns on Example 2. FIG. Explanatory drawing for demonstrating the manufacturing process of the organic EL element which concerns on Example 2. FIG. Explanatory drawing for demonstrating the manufacturing process of the organic EL element which concerns on Example 2. FIG. Explanatory drawing for demonstrating the manufacturing process of the organic EL element which concerns on Example 2. FIG. Explanatory drawing for demonstrating the manufacturing process of the organic EL element which concerns on Example 2. FIG. Explanatory drawing for demonstrating the manufacturing process of the organic EL element which concerns on Example 2. FIG. Explanatory drawing for demonstrating the manufacturing process of the organic EL element which concerns on Example 2. FIG. Explanatory drawing for demonstrating the manufacturing process of the organic EL element which concerns on Example 2. FIG. Explanatory drawing for demonstrating the manufacturing process of the organic EL element which concerns on Example 2. FIG. The perspective view of the personal computer provided with the organic EL element which concerns on an Example. The perspective view of the mobile telephone provided with the organic EL element which concerns on an Example.

Explanation of symbols

  100 organic EL element, 101 substrate, 102 anode (first electrode), 103 cathode (second electrode), 103 hole injection / transport layer, 104 organic layer, 105 cathode, 110 substrate, 120 photocrosslinking material, 200 organic EL Element, 201 Electron transport layer, 300 Personal computer, 301 Keyboard, 302 Main unit, 303 Display unit, 400 Mobile phone, 401 Operation button, 402 Earpiece, 403 Mouthpiece, 404 Display unit

Claims (8)

In a method for manufacturing an organic EL element having an organic layer sandwiched between a first electrode, a second electrode, and the first electrode and the second electrode,
A first organic layer forming step of forming a first organic layer by disposing a liquid material of a first organic material on a substrate;
After the surface of the first organic layer is placed on the surface of the photocrosslinking material applied on the substrate, the surface of the first organic layer is photocrosslinked by irradiating light, and the organic solvent is used. A surface modification step for insolubilization,
A second organic layer forming step of forming a second organic layer by disposing a liquid in which a second organic material is dissolved in an organic solvent on the first organic layer whose surface is photocrosslinked When,
The manufacturing method of the organic EL element characterized by including.   2. The method of manufacturing an organic EL element according to claim 1, wherein the first organic layer is a hole injection / transport layer, and the second organic layer is a light emitting layer.   2. The method of manufacturing an organic EL element according to claim 1, wherein the first organic layer is a light emitting layer, and the second organic layer is an electron transport layer.   The organic EL according to any one of claims 1 to 3, wherein, in the surface modification step, a substrate on which the first organic layer is formed is pressed against the substrate. Device manufacturing method. In the method of manufacturing an organic EL element having an organic layer sandwiched between the first electrode, the second electrode, the first electrode, and the second electrode,
A first organic layer forming step of forming a first organic layer by disposing a liquid material of a first organic material on the first electrode;
After the surface of the first organic layer is placed on the surface of the photocrosslinking material applied on the substrate, the surface of the first organic layer is photocrosslinked by irradiating light. A first surface modification step for insolubilizing the surface of the organic layer in an organic solvent;
A second organic layer forming step of forming a second organic layer by disposing a liquid in which a second organic material is dissolved in an organic solvent on the first organic layer whose surface is photocrosslinked When,
After the surface of the second organic layer is placed on the surface of the photocrosslinking material applied on the substrate, the surface of the second organic layer is photocrosslinked by irradiating light, and the second A second surface modification step for insolubilizing the surface of the organic layer in an organic solvent;
A third organic layer forming step of forming a third organic layer by disposing a liquid in which a third organic material is dissolved in an organic solvent on the second organic layer whose surface is photocrosslinked When,
The manufacturing method of the organic EL element characterized by including.   The first organic layer is a hole injection / transport layer, the second organic layer is a light emitting layer, and the third organic layer is an electron transport layer. 5. A method for producing an organic EL device according to 5.   An organic EL device manufactured by the method for manufacturing an organic EL device according to claim 1.   An electronic apparatus comprising the organic EL element according to claim 7.

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