JP2008235605A - Display device and method for manufacturing display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device and its manufacturing method which is good in display quality level with few color shift irrespective of an observation direction. <P>SOLUTION: The display device includes a first electrode 60 equipped with a recess-projection plane 60S having scattering power, an organic active layer 62 arranged on the recess-projection plane of the first electrode, and a second electrode 64 arranged on the organic active layer, wherein the organic active layer 62 includes a light-emitting layer 62B, a conductive organic layer 62A formed so as to be a film thickness to planarize the recess-projection plane, being arranged between the light-emitting layer and the recess-projection plane. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device and a method for manufacturing the display device, and more particularly to a display device including a self-luminous element and a method for manufacturing the display device.

  In recent years, organic electroluminescence (EL) display devices have attracted attention as flat display devices. Since this organic EL display device is a self-luminous element, it has a wide viewing angle, can be thinned without requiring a backlight, has low power consumption, and has a high response speed. ing.

Because of these characteristics, organic EL display devices are attracting attention as potential candidates for next-generation flat display devices that can replace liquid crystal display devices. Such an organic EL display device includes an organic EL element in which an organic active layer containing an organic compound having a light emitting function is held between a pair of electrodes. Among such organic EL elements, a configuration in which a reflective electrode having light reflectivity such as aluminum is applied as one electrode and a transparent electrode having light transmittance such as ITO (Indium Tin Oxide) is applied as the other electrode Organic EL elements have been proposed. In such a configuration, some of the light output from the light emitting layer included in the organic active layer is output directly from the transparent electrode side, but the light output to the reflective electrode side is reflected by the reflective electrode. And output to the transparent electrode side (see, for example, Patent Document 1).
JP 2002-373776 A

  In a structure in which an organic active layer including a light emitting layer is laminated on a substantially flat reflective electrode, light directly output from the light emitting point in the light emitting layer interferes with light output after being reflected by the reflective electrode. In addition, a so-called color shift in which the color changes depending on the direction in which the display device is observed may cause a reduction in display quality.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a display device having a good display quality with little color shift regardless of the viewing direction, and a method for manufacturing the display device. .

A display device according to an aspect of the present invention includes:
A first electrode having scattering ability and having an uneven surface;
An organic active layer disposed on the uneven surface of the first electrode;
A second electrode disposed on the organic active layer,
The organic active layer is
A light emitting layer;
And a conductive organic layer formed between the light emitting layer and the concavo-convex surface and having a thickness that flattens the concavo-convex surface.

Also,
A first electrode having scattering ability and having an uneven surface;
An organic active layer disposed on the uneven surface of the first electrode;
A second electrode disposed on the organic active layer,
The organic active layer is
A light emitting layer formed to have a film thickness that flattens the uneven surface;
And a conductive organic layer formed between the light emitting layer and the concavo-convex surface and having a thickness along the concavo-convex surface.

A method for manufacturing a display device according to an aspect of the present invention includes:
Forming a first electrode having scattering power and having an uneven surface;
Forming an organic active layer on the irregular surface of the first electrode;
Forming a second electrode on the organic active layer,
The step of forming the organic active layer includes:
Forming a conductive organic layer having a film thickness so as to flatten the uneven surface by selective coating on the uneven surface of the first electrode;
And a step of forming a light emitting layer on the conductive organic layer by a selective coating method or a vapor deposition method.

Also,
Forming a first electrode having scattering power and having an uneven surface;
Forming an organic active layer on the irregular surface of the first electrode;
Forming a second electrode on the organic active layer,
The step of forming the organic active layer includes:
Forming a conductive organic layer on the concavo-convex surface of the first electrode by vapor deposition;
And a step of forming a light emitting layer having a film thickness so as to flatten the uneven surface on the conductive organic layer by a selective coating method.

  According to the present invention, it is possible to provide a display device with a good display quality with little color shift regardless of the viewing direction, and a method for manufacturing the display device.

  A display device according to an embodiment of the present invention will be described below with reference to the drawings. In this embodiment, a self-luminous display device, for example, an organic EL (electroluminescence) display device will be described as an example of the display device.

  As shown in FIG. 1, the organic EL display device 1 includes an array substrate 100 having a display area 102 for displaying an image. The display area 102 includes a plurality of pixels PX (R, G, B) arranged in a matrix. At least the display area 102 of the array substrate 100 is sealed with a sealing body 200.

  In addition, the array substrate 100 includes a plurality of scanning lines Ym (m = 1, 2,...) Arranged along the row direction of the pixels PX (that is, the Y direction in FIG. 1) and columns substantially orthogonal to the scanning lines Ym. A plurality of signal lines Xn (n = 1, 2,...) Arranged along the direction (that is, the X direction in FIG. 1), and a power supply line P for supplying power to the organic EL element 40. ing.

  Furthermore, the array substrate 100 has at least a portion functioning as a scanning line driving circuit 107 that supplies a scanning signal to each of the scanning lines Ym in the peripheral area 104 along the outer periphery of the display area 102, and each of the signal lines Xn. And at least a part functioning as a signal line driver circuit 108 for supplying a video signal. All the scanning lines Ym are connected to the scanning line driving circuit 107. All signal lines Xn are connected to the signal line driving circuit 108.

  Each pixel PX (R, G, B) includes a pixel circuit and a display element that is driven and controlled by the pixel circuit. The pixel circuit shown in FIG. 1 is an example, and it goes without saying that a pixel circuit having another configuration may be applied. In the example shown in FIG. 1, the pixel circuit is supplied via the pixel switch 10 and a pixel switch 10 having a function of electrically separating an on pixel and an off pixel and holding a video signal to the on pixel. The driving transistor 20 supplies a desired driving current to the display element based on the video signal, and the storage capacitor element 30 holds the gate-source potential of the driving transistor 20 for a predetermined period. The pixel switch 10 and the drive transistor 20 are constituted by, for example, thin film transistors, and here, a thin film transistor including a semiconductor layer made of polysilicon is applied.

  The gate of the drive transistor 20 is connected to the drain of the pixel switch 10 and one end of the storage capacitor element 30. The source of the driving transistor 20 is connected to the power supply line P and the other end of the storage capacitor element 30.

  The display element is composed of organic EL elements 40 (R, G, B) which are self-luminous elements. That is, the red pixel PXR includes an organic EL element 40R that mainly emits light corresponding to the red wavelength. The green pixel PXG includes an organic EL element 40G that mainly emits light corresponding to the green wavelength. The blue pixel PXB includes an organic EL element 40B that mainly emits light corresponding to the blue wavelength.

  The various organic EL elements 40 (R, G, B) have basically the same configuration.

(First embodiment)
As shown in FIG. 2, the organic EL element 40 according to the first embodiment is disposed on the wiring board 120. The wiring board 120 is provided with various insulating layers such as an undercoat layer and a gate insulating film on an insulating support substrate such as a glass substrate and a plastic sheet, in addition to the pixel switch 10, the drive transistor 20, and the storage described above. The capacitor 30 is configured to include various wirings (scanning lines, signal lines, power supply lines, etc.).

  The organic EL element 40 includes a first electrode 60 arranged in an independent island shape for each pixel PX, a second electrode 64 arranged opposite to the first electrode 60 and common to the plurality of pixels PX, The organic active layer 62 is held between the first electrode 60 and the second electrode 64.

  The first electrode 60 is disposed on the wiring board 120 and functions as an anode. The first electrode 60 is connected to the drain of the driving transistor 20. The first electrode 60 is configured to have scattering ability.

  That is, in the example shown in FIG. 2, the first electrode 60 is configured by a laminated body in which a transparent electrode 60 </ b> T having light transmittance is stacked on a reflective electrode 60 </ b> R having light reflectivity. The reflective electrode 60R is made of, for example, aluminum. The surface of the reflective electrode 60R constitutes a scattering surface composed of a plurality of concave portions and convex portions. The transparent electrode 60T is made of, for example, ITO. The transparent electrode 60T is formed to have a film thickness (that is, a substantially constant film thickness) along the scattering surface of the reflective electrode 60R, and the surface of the transparent electrode 60T, that is, the surface of the first electrode 60 has an uneven shape on the scattering surface. A concave / convex surface 60 </ b> S to follow is configured.

  The first electrode 60 is not limited to the structure shown in FIG. 2 as long as the first electrode 60 has a scattering ability and the surface thereof is an uneven surface. In this embodiment, the thickness of the reflective electrode 60R is set to 0.1 μm, and the thickness of the transparent electrode 60T is set to 0.05 μm.

  For the uneven surface 60S of the first electrode 60, the pitch P between adjacent convex portions CV (or the pitch between adjacent concave portions CC) P is, for example, 5 μm to 20 μm in order to obtain sufficient scattering performance. The distribution is preferably within a range of 5 μm to 10 μm.

  Further, in the concavo-convex surface 60S, the length along the normal direction of the substrate from the bottom of the concave portion CC to the top of the convex portion CV (or simply the depth of the concave portion CC or simply the height of the convex portion CV) L. In order to obtain sufficient scattering performance, it is desirable that the maximum value in the uneven surface is 0.3 μm or more. As the length L increases, higher diffusion performance can be obtained. However, if the length L is too large, the display may be adversely affected such as a short circuit with the second electrode 64 or a decrease in light emission efficiency in the light emitting layer. The following is desirable. In this embodiment, the length L is set to 0.5 μm.

  The organic active layer 62 is disposed on the uneven surface 60S of the first electrode 60 and includes at least a light emitting layer. The organic active layer 62 may include, for example, a hole transport layer, a hole injection layer, a blocking layer, an electron transport layer, an electron injection layer, a buffer layer, and the like as a layer other than the light emitting layer. A composite layer may be included. The light-emitting layer is formed of an organic compound having a light-emitting function that emits red, green, or blue light. Among such organic active layers 62, an organic layer formed of a polymer material can be formed by applying a liquid material by a selective coating method such as an ink jet method and then drying, and can form a low molecular weight material. The organic layer formed of the system material can be formed by an evaporation method.

  In this embodiment, the organic active layer 62 includes a light emitting layer 62B and a conductive organic layer 62A disposed between the light emitting layer 62B and the uneven surface 60S and having a hole transport function. The conductive organic layer 62A is formed of a conductive polymer such as PEDOT (polyethylenedioxythiophene), for example. Since such a conductive polymer has a relatively high refractive index (n≈2), even if it is thickened, the influence on the light output from the light emitting layer 62B is extremely small.

  The conductive organic layer 62A is disposed on the concavo-convex surface 60S and has a thickness T62A that flattens the concavo-convex surface 60S. The film thickness T62A here is a length along the normal direction of the substrate from the bottom in the concave portion CC of the concave and convex surface 60S. This conductive organic layer 62A has a film thickness T62A sufficient to fill the depth L of the recess CC, and the depth L is set to 0.5 μm, for example 0.5 μm. It is formed to have a film thickness T62A in the range of 2.0 μm to 2.0 μm. In the first embodiment, the film thickness T62A is set to 0.7 μm.

  Note that the film thickness T62A for flattening the uneven surface 60S is not limited to the case where the surface of the conductive organic layer 62A is substantially flat, and the film thickness Tv corresponding to the convex portion CV of the uneven surface 60S. It has a distribution that is smaller than the film thickness Tc corresponding to the recess CC (Tv <Tc) and that the difference in film thickness is equal to or less than the depth L of the recess CC (Tc−Tv ≦ L). Any film thickness may be used. That is, slight undulations smaller than the undulations of the uneven surface 60S may remain on the surface of the conductive organic layer 62A.

  The light emitting layer 62B is disposed on the conductive organic layer 62A. The light emitting layer 62B has a substantially constant film thickness T62B, and is formed to have a film thickness T62B in the range of 0.1 μm to 0.5 μm, for example. In the first embodiment, the film thickness T62B is set to 0.2 μm.

  The organic active layer 62 including the conductive organic layer 62A and the light emitting layer 62B has a first film thickness T1 corresponding to the convex portion CV of the uneven surface 60S with respect to the film thickness from the uneven surface 60S to the light emitting layer 62B. And a second film thickness T2 that is thicker than the first film thickness T1 corresponding to the recess CC.

  The second electrode 64 is disposed on the substantially flat organic active layer 62 and functions as a cathode. The second electrode 64 is disposed around the display area 102 and is connected to a second electrode power line (not shown) that supplies a common potential, here, a ground potential.

  Further, the array substrate 100 includes a partition wall 70 that separates the pixels RX (R, G, B) in the display area 102. The partition walls 70 are arranged in a lattice shape so as to cover the entire periphery of the first electrode 60.

  In the first embodiment as described above, since the first electrode 60 has scattering ability and has an uneven surface, the light traveling from the light emitting point in the light emitting layer 62B toward the first electrode 60 is caused by the scattering surface. After being reflected and scattered, it is output from the second electrode 64 side. In addition, since the conductive organic layer 62A having a non-uniform film thickness distribution is disposed between the light emitting layer 62B and the first electrode 60, the second from the light emitting point via the scattering surface of the first electrode 60. The optical path length of the light guided to the electrode 64 side varies depending on the path, and is sufficiently long to mitigate the interference effect. For this reason, the interference effect with the light directly output from the light emitting point to the second electrode 64 side is mitigated, and the color shift depending on the observation direction can be suppressed. Therefore, display quality can be improved.

(Second Embodiment)
As shown in FIG. 3, the organic EL element 40 according to the second embodiment is disposed on the wiring board 120 as in the first embodiment. In addition, about the same structure as 1st Embodiment, the same referential mark is attached | subjected and detailed description is abbreviate | omitted.

  That is, the organic EL element 40 has a configuration in which the organic active layer 62 is held between the first electrode 60 and the second electrode 64.

  The first electrode 60 is disposed on the wiring board 120, has a scattering ability, and includes a concavo-convex surface 60S composed of a plurality of concave portions CC and convex portions CV. About this uneven surface 60S, it is comprised similarly to 1st Embodiment, and length L is set to 0.5 micrometer.

  The organic active layer 62 is disposed on the uneven surface 60S of the first electrode 60 and includes at least a light emitting layer. Similar to the first embodiment, the organic active layer 62 includes a light emitting layer 62B, and a conductive organic layer 62A that is disposed between the light emitting layer 62B and the uneven surface 60S and has a hole transport function. ing.

  The conductive organic layer 62A is disposed on the concavo-convex surface 60S, and is formed in a film thickness (that is, a substantially constant film thickness) T62A along the concavo-convex surface 60S. The conductive organic layer 62A is formed to have a film thickness T62A in the range of 0.02 μm to 0.2 μm, for example. In the second embodiment, the film thickness T62A is set to 0.1 μm.

  The light emitting layer 62B is disposed on the conductive organic layer 62A and has a thickness T62B that flattens the uneven surface 60S. The film thickness T62B here is a length along the normal direction of the substrate from the bottom in the concave portion CC of the concave and convex surface 60S. The light emitting layer 62B has a film thickness T62B sufficient to fill the depth L of the concave portion CC, and the depth L is set to 0.5 μm, for example, 0.5 μm to 2 μm. It is formed to have a film thickness T62B in the range of 0.0 μm. In the second embodiment, the film thickness T62B is set to 0.7 μm.

  Note that the film thickness T62B that flattens the uneven surface 60S is not limited to the case where the surface of the light emitting layer 62B is substantially flat, and the film thickness Tv corresponding to the protrusion CV of the uneven surface 60S is the recess CC. Is smaller than the film thickness Tc corresponding to (Tv <Tc), and the film thickness has such a distribution that the film thickness difference is equal to or less than the depth L of the recess CC (Tc−Tv ≦ L). If it is good. That is, a slight undulation smaller than the undulation of the uneven surface 60S may remain on the surface of the light emitting layer 62B.

  The organic active layer 62 including the conductive organic layer 62A and the light emitting layer 62B has a first film thickness T1 corresponding to the convex portion CV of the uneven surface 60S with respect to the film thickness from the uneven surface 60S to the light emitting layer 62B. And a second film thickness T2 that is thicker than the first film thickness T1 corresponding to the recess CC.

  In the second embodiment as described above, similarly to the first embodiment, the light guided from the light emitting point in the light emitting layer 62B to the second electrode 64 via the first electrode 60 and the light emitting point The interference effect with the light directly output to the two-electrode 64 side is mitigated, and the color shift depending on the observation direction can be suppressed. Therefore, display quality can be improved.

  In these first and second embodiments, an insulating film such as a flattening layer is provided between the reflective layer and the first electrode for the purpose of flattening the unevenness of the reflective layer. Is no longer necessary. Therefore, it is possible to reduce the thickness and cost of the display device.

  Next, a method for manufacturing an organic EL display device will be described.

  First, as illustrated in FIG. 4A, the island-shaped first electrode 60 is formed for each pixel on the wiring substrate 120. That is, the wiring substrate 120 having a plurality of concave portions and convex portions on the surface thereof is prepared by repeating processes such as formation of a metal film and an insulating film and patterning. Then, after forming the reflective electrode 60R having a substantially uniform film thickness on the surface of the wiring substrate 120, the transparent electrode 60T having a substantially uniform film thickness is formed on the reflective electrode 60R. The reflective electrode 60R and the transparent electrode 60T may be generally formed by a photolithography process or may be formed by a mask sputtering method. Thereby, the 1st electrode 60 which has scattering power and was provided with the uneven surface 60S is formed.

  Subsequently, the organic active layer 62 is formed on the uneven surface 60 </ b> S of the first electrode 60. That is, in the example shown in FIG. 4B, the conductive organic layer 62A having a film thickness that flattens the uneven surface 60S is formed on the uneven surface 60S of the first electrode 60 by a selective coating method. That is, a liquid material made of a polymer organic material having a hole transport function is sprayed toward the first electrode 60 to apply a sufficient amount, and then a drying process is performed to remove the solvent contained in the liquid material. As a result, a conductive organic layer 62A having a non-uniform film thickness distribution and a substantially flat surface is formed.

  Thereafter, as shown in FIG. 4C, a light emitting layer 62B is formed on the conductive organic layer 62A by selective coating or vapor deposition. Thereby, the light emitting layer 62B having a substantially uniform film thickness distribution is formed.

  Then, the second electrode 64 is formed on the substantially flat surface of the organic active layer 62. Thereby, the organic EL element 40 having the structure shown in FIG. 2 is formed.

  On the other hand, in the example shown in FIG. 4D, the conductive organic layer 62A is formed on the uneven surface 60S of the first electrode 60 by vapor deposition. Thereby, the conductive organic layer 62A having a substantially uniform film thickness distribution is formed. That is, the surface of the conductive organic layer 62 </ b> A has undulations equivalent to the uneven surface 60.

  Thereafter, as shown in FIG. 4E, a light emitting layer 62B having a film thickness that flattens the uneven surface 60S is formed on the conductive organic layer 62A by a selective coating method. That is, a liquid material made of a polymer organic material having a light emitting function is sprayed toward the conductive organic layer 62A to apply a sufficient amount, and then a drying process is performed to remove the solvent contained in the liquid material. Thereby, the light emitting layer 62A having a non-uniform film thickness distribution and a substantially flat surface is formed.

  Then, the second electrode 64 is formed on the substantially flat surface of the organic active layer 62. Thereby, the organic EL element 40 having the structure shown in FIG. 3 is formed.

  It was confirmed that the organic EL display device manufactured in this way uniformly emitted light with a substantially constant color regardless of the viewing direction.

  The inventors verified the color shift according to the viewing direction. That is, a change in chromaticity accompanying an increase in viewing angle in the white display state was measured. In this measurement, chromaticity was expressed using the CIE 1976 UCS chromaticity diagram. When the chromaticity difference between the chromaticity observed from the normal direction of the screen and the chromaticity observed from the viewing angle direction of 80 ° with respect to the normal is represented by | Δv ′ | and | Δu ′ | For the organic EL device according to the first embodiment shown in FIG. 2, | Δv ′ | was 0.015, and | Δu ′ | was 0.013. Further, in the organic EL element according to the second embodiment shown in FIG. 3, | Δv ′ | was 0.017 and | Δu ′ | was 0.015.

  The indicators that the color shift is less likely to be visually recognized are | Δv ′ | is 0.02 or less and | Δu ′ | is 0.02 or less. It was confirmed that the shift was suppressed and good display quality was obtained.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the components without departing from the gist of the invention in the stage of implementation. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

FIG. 1 is a diagram schematically showing a configuration of an organic EL display device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing the structure of the organic EL element according to the first embodiment when the organic EL display device shown in FIG. 1 is cut. FIG. 3 is a cross-sectional view schematically showing the structure of the organic EL element according to the second embodiment when the organic EL display device shown in FIG. 1 is cut. FIG. 4A is a diagram for explaining a manufacturing process for forming an organic EL element, and is a diagram for explaining a process of forming a first electrode. FIG. 4B is a diagram for explaining a manufacturing process for forming the organic EL element, and is a diagram for explaining a process of forming a conductive organic layer of the organic EL element according to the first embodiment. . FIG. 4C is a diagram for explaining a manufacturing process for forming the organic EL element, and is a diagram for explaining a process of forming a light emitting layer of the organic EL element according to the first embodiment. FIG. 4D is a diagram for explaining a manufacturing process for forming the organic EL element, and is a diagram for explaining a process of forming a conductive organic layer of the organic EL element according to the second embodiment. . FIG. 4E is a diagram for explaining a manufacturing process for forming the organic EL element, and is a diagram for explaining a process of forming a light emitting layer of the organic EL element according to the second embodiment.

Explanation of symbols

PX ... Pixel Ym ... Scanning line Xn ... Signal line P ... Power supply line 1 ... Organic EL display device 10 ... Pixel switch 20 ... Drive transistor 30 ... Storage capacitor element 40 ... Organic EL element 60 ... First electrode 60S ... Uneven surface 62 ... Organic active layer 62A ... Conductive organic layer 62B ... Light emitting layer 64 ... Second electrode 70 ... Partition 100 ... Array substrate 120 ... Wiring substrate 200 ... Sealing body

Claims (11)

A first electrode having scattering ability and having an uneven surface;
An organic active layer disposed on the uneven surface of the first electrode;
A second electrode disposed on the organic active layer,
The organic active layer is
A light emitting layer;
A display device comprising: a conductive organic layer disposed between the light emitting layer and the concavo-convex surface and having a thickness that flattens the concavo-convex surface. A first electrode having scattering ability and having an uneven surface;
An organic active layer disposed on the uneven surface of the first electrode;
A second electrode disposed on the organic active layer,
The organic active layer is
A light emitting layer formed to have a film thickness that flattens the uneven surface;
A display device comprising: a conductive organic layer disposed between the light emitting layer and the concavo-convex surface and having a film thickness along the concavo-convex surface. A first electrode having scattering ability and having an uneven surface;
An organic active layer disposed on the uneven surface of the first electrode;
A second electrode disposed on the organic active layer,
The organic active layer includes a light emitting layer, and has a first film thickness corresponding to the convex portion of the concave and convex surface and a first film corresponding to the concave portion of the concave and convex surface with respect to the film thickness from the concave and convex surface to the light emitting layer A display device having a second film thickness greater than the thickness.   4. The display device according to claim 1, wherein a length from a bottom portion to a top portion of the uneven surface is not less than 0.3 μm and not more than 3.0 μm.   The display device according to claim 1, wherein a pitch between adjacent convex portions of the uneven surface is 20 μm or less.   The display device according to claim 1, wherein a film thickness of the conductive organic layer is larger than a length from a bottom portion to a top portion of the uneven surface.   The display device according to claim 1, wherein a thickness of the light emitting layer is smaller than a thickness of the conductive organic layer.   The display device according to claim 2, wherein a thickness of the light emitting layer is larger than a length from a bottom portion to a top portion of the uneven surface.   The display device according to claim 2, wherein a thickness of the light emitting layer is larger than a thickness of the conductive organic layer. Forming a first electrode having scattering power and having an uneven surface;
Forming an organic active layer on the irregular surface of the first electrode;
Forming a second electrode on the organic active layer,
The step of forming the organic active layer includes:
Forming a conductive organic layer having a film thickness so as to flatten the uneven surface by selective coating on the uneven surface of the first electrode;
And a step of forming a light emitting layer on the conductive organic layer by a selective coating method or a vapor deposition method. Forming a first electrode having scattering power and having an uneven surface;
Forming an organic active layer on the irregular surface of the first electrode;
Forming a second electrode on the organic active layer,
The step of forming the organic active layer includes:
Forming a conductive organic layer on the concavo-convex surface of the first electrode by vapor deposition;
Forming a light emitting layer having a film thickness so as to flatten the uneven surface on the conductive organic layer by a selective coating method.

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