Organic light-emitting device, display device having the same, electronic device, and method for manufacturing the organic light-emitting device

Abstract

This invention provides a highly reliable organic light-emitting device that incorporates an on-chip color filter layer. [Solution] An organic light-emitting device comprising an insulating layer, an organic light-emitting element disposed on the main surface of the insulating layer, and a color filter layer covering the organic light-emitting element and having a first color filter that transmits a first wavelength and a second color filter that transmits a second wavelength different from the first wavelength, wherein the concentration of an organic alkali having nitrogen atoms and hydroxyl groups contained in the color filter layer is 108.2 ng / cm³. 2 An organic light-emitting device characterized by being less than [amount missing].

Description

[Technical Field]

[0001] The present invention relates to an organic light-emitting device, a display device having the same, an electronic device, and a method for manufacturing an organic light-emitting device. [Background technology]

[0002] In recent years, organic light-emitting devices, which are self-emissive devices, have attracted attention as flat panel displays. An organic light-emitting device is a light-emitting element that has an organic layer including a light-emitting layer. Organic light-emitting devices are known to include types that emit different colors for each pixel, and types that emit white light and are spectrally separated by a color filter.

[0003] Color filters are known to be either on-glass color filters or on-chip color filters. On-glass color filters are formed on a substrate different from the substrate on which the organic light-emitting element is formed, and then bonded to the substrate on which the organic light-emitting element is formed. On the other hand, on-chip color filters are formed on the organic light-emitting element that has been created.

[0004] Patent Document 1 describes a color filter forming process that includes the step of exposing a photosensitive resin and removing the unexposed portion of the resin layer with an alkaline developer. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-113494 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] The organic light-emitting device described in Patent Document 1 has an on-chip color filter. However, since the heat resistance of organic light-emitting elements is lower than that of elements composed of an inorganic layer, they are formed at a lower temperature than the conditions for the inorganic layer. In the color filter formed at a low temperature, the developer solution that had decomposed at the high temperature used to form the inorganic layer remained. Organic light-emitting devices having on-chip color filters with these components remaining had reduced reliability due to these components.

[0007] This invention has been made in view of the above-mentioned problems, and its purpose is to provide a highly reliable organic light emission device by reducing the components contained in the developing solution. [Means for solving the problem]

[0008] The present invention comprises an insulating layer, an organic light-emitting element disposed on the main surface of the insulating layer, and a color filter layer covering the organic light-emitting element and having a first color filter that transmits a first wavelength and a second color filter that transmits a second wavelength different from the first wavelength. The first color filter and the second color filter each have a first surface facing the organic light-emitting element and a second surface opposite to the first surface. An organic light-emitting device wherein the difference between the distance between the first surface of the first color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, and the distance between the first surface of the second color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, is smaller than the difference between the distance between the second surface of the first color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, and the distance between the second surface of the second color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, The concentration of the organic alkali containing nitrogen atoms and hydroxyl groups contained in the color filter layer is 108.2 ng / cm³. 2 The present invention provides an organic light-emitting device characterized by being less than [amount missing]. [Effects of the Invention]

[0009] According to the present invention, a highly reliable organic light-emitting device can be provided by reducing the components contained in the developer.

Brief Description of Drawings

[0010] [Figure 1] (a) A schematic cross-sectional view of a conventional organic light-emitting device including an on-glass color filter. (b) A schematic cross-sectional view of an organic light-emitting device according to an embodiment of the present invention. (c) A schematic view of an organic light-emitting device according to an embodiment of the present invention. [Figure 2] A graph showing the relationship between the TMAH concentration of the color filter and the number of defects. [Figure 3] (a) to (d) Schematic cross-sectional views of organic light-emitting devices according to other exemplary embodiments of the present invention. [Figure 4] (a) A schematic diagram showing a process of manufacturing a green filter of an organic light-emitting device according to an embodiment of the present invention. (b) A schematic diagram showing a process of forming a blue filter of an organic light-emitting element. (c) A schematic diagram showing a process of forming a red filter of an organic light-emitting element. (d) A plan view of an example of the organic light-emitting device according to the present embodiment. [Figure 5] A schematic diagram representing an example of a display device according to an embodiment of the present invention. [Figure 6] (a) A schematic diagram representing an example of an imaging device according to an embodiment of the present invention. (b) A schematic diagram representing an example of an electronic device according to an embodiment of the present invention. [Figure 7] (a) A schematic diagram representing an example of a display device according to an embodiment of the present invention. (b) A schematic diagram representing an example of a foldable display device. [Figure 8] (a) A schematic diagram showing an example of a lighting device according to an embodiment of the present invention. (b) A schematic diagram showing an example of an automobile having a vehicle lamp according to an embodiment of the present invention. [Figure 9] (a) A schematic diagram showing an example of a wearable device according to an embodiment of the present invention. (b) A schematic diagram showing an example of a wearable device according to an embodiment of the present invention, in a form having an imaging device.

Embodiment for Carrying Out the Invention

[0011] An organic light-emitting device according to an embodiment of the present invention includes an insulating layer, a first organic light-emitting element and a second organic light-emitting element disposed on a main surface of the insulating layer, a first color filter that overlaps the first organic light-emitting element in a plan view and transmits a first wavelength, and a second color filter that overlaps the first organic light-emitting element in a plan view and transmits a second wavelength different from the first wavelength, and a color filter layer having the second color filter, the first color filter and the second color filter have a first surface facing the organic light-emitting element and a second surface opposite to the first surface, and a distance between the first surface of the first color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, and a distance between the first surface of the second color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, and a difference between the two is smaller than a difference between a distance between the second surface of the first color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer and a distance between the second surface of the second color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer. The organic light-emitting device is characterized in that the concentration of an organic alkali having a nitrogen atom and a hydroxyl group contained in the color filter layer is less than 108.2 ng / cm 2 An organic light-emitting device characterized in that it is less than. The concentration of the organic alkali is preferably 40 ng / cm 2 or less, and more preferably 10 ng / cm 2 or less. Further, it may be 0.08 ng / cm 2 or more, and may be 0.01 ng / cm or more. Since the non-thermally decomposed organic alkali may not be removed only by the removal process, the concentration of the organic alkali may be more than 0 ng / cm 2 or more.

[0012] The on-chip color filter formed on the organic light-emitting device has the same surface facing the organic light-emitting element for each color. That is, the color filter layer has a first color filter that transmits a first wavelength and a second color filter that transmits a second wavelength different from the first wavelength. The first and second color filters have a first surface facing the organic light-emitting element and a second surface opposite to the first surface.

[0013] The difference between the distance between the first surface of the first color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, and the distance between the first surface of the second color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, is smaller than the difference between the distance between the second surface of the first color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, and the distance between the second surface of the second color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer.

[0014] In the case of a color filter with red, green, and blue color filter layers, the first surface facing the organic light-emitting element has each color surface at a relatively similar height, while the second surface opposite the first surface has each color surface at a different height. This is because, in on-chip color filters, the height of the second surface of each color filter is different. This is because, in on-chip color filters, the color filters are formed on top of the organic light-emitting element in a specific order, for example, green, blue, and red. In this case, the second surfaces are located further from the insulating layer in the order of green, blue, and red. In on-glass color filters, it is the second surfaces of the color filters, not the first surface, that are at the same position.

[0015] A second color filter may be placed next to the first color filter in a planar view. A third color filter, different from the first and second color filters, may be placed next to the first and second color filters in a planar view. "Next to" means that each color filter may be in direct contact or in contact via a black matrix.

[0016] An organic light-emitting element has a first electrode, an organic layer, and a second electrode, from the substrate side. When a first organic light-emitting element is superimposed on a first color filter in a plan view, the first electrode is superimposed on the first color filter in a plan view. The same applies when superimposing with other organic light-emitting elements. An organic light-emitting element may have a pixel separation layer that separates the first electrode from any first electrodes adjacent to it. The organic layer and the second electrode may be shared by multiple organic light-emitting elements.

[0017] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[0018] [First Embodiment] Figure 1(a) is a schematic cross-sectional view of a conventional organic light-emitting device equipped with an on-glass color filter. This display device is used as an organic light-emitting display. It shows a drive circuit layer 11 formed on a substrate 10, an OLED layer 12 containing multiple organic light-emitting elements, a protective layer 13, a first planarization layer 14, a color filter layer 15, a second planarization layer 16, and a cover glass 17.

[0019] The color filter layer consists of a green filter 15a, a blue filter 15b, and a red filter 15c. The color filter layer may consist of filters that transmit other colors. The color filter layer has a color filter that transmits a first wavelength, a color filter that transmits a second wavelength different from the first wavelength, and a color filter that transmits a third wavelength different from the first and second wavelengths. In Figure 1, a green filter 15a, a blue filter 15b, and a red filter 15c are shown as an example. The color filter has a first surface on the substrate side and a second surface opposite the first surface. In this figure, since the color filter layer is an on-glass color filter, the first surfaces of the green filter, blue filter, and red filter are not aligned, while the second surfaces of the green filter, blue filter, and red filter are aligned. In other words, the difference between the distance from the first surface of the first color filter to the substrate and the distance from the first surface of the second color filter to the substrate, in a direction perpendicular to the main surface of the substrate, is greater than the difference between the distance from the second surface of the first color filter to the substrate and the distance from the second surface of the second color filter to the substrate, in a direction perpendicular to the main surface of the substrate. This thickness relationship occurs because the color filter layers are manufactured on separate substrates and then bonded together.

[0020] Since the separate substrate does not have an OLED layer, a heating step can be included in the color filter layer formation process without considering the impact on the organic compounds of the OLED layer. As a result, the components of the developer used for patterning the color filter layer are thermally decomposed and virtually do not remain in the color filter layer.

[0021] The drive circuit layer is a layer in which transistors are formed within an insulating layer, and the insulating layer may be made of an inorganic or organic material. The drive circuit layer may include transistors and capacitors (not shown), and the transistors may be switch transistors or transistors that control the amount of current to control the brightness of an organic light-emitting element.

[0022] The OLED layer 12 includes multiple organic light-emitting elements. Each organic light-emitting element has a first electrode, an organic layer, and a second electrode, starting from the substrate side. The organic compound layer may have a configuration in which, for example, a hole injection layer, a hole transport layer, an emissive layer, an electron transport layer, and an electron injection layer are stacked. Furthermore, the OLED layer 12 can change its emission color depending on the constituent material of the emissive layer. The emission color may be, for example, white or light in a specific wavelength range.

[0023] The protective layer 13 is a protective layer for the organic light-emitting element and may be composed of an inorganic material such as silicon nitride. While the protective layer should ideally be impermeable to moisture and oxygen, it may be permeable to moisture in the sense that complete protection is not required. Furthermore, if the organic light-emitting device is flexible, foldable, or stretchable, the moisture permeability of the protective layer may increase.

[0024] The first resin layer 14 may be formed for purposes such as planarizing the surface on which the color filter layer is formed. For example, it may be composed of an organic material such as acrylic resin. It may also be called a planarizing layer for its purpose.

[0025] The color filter layer 15 absorbs some of the light emitted by the organic light-emitting element and transmits some of it. For example, by absorbing all colors except red and transmitting red, it is possible to spectrally separate red light from white light. The color filter layer may be composed of an organic material containing a pigment.

[0026] The second resin layer 15 may be formed for purposes such as flattening the formation surface of the component formed on the color filter layer. Like the first resin layer, it may be made of an organic material. Depending on the configuration of the organic light-emitting device, it may not be provided.

[0027] The cover glass 17 is a protective component for protecting the organic light-emitting device from external impacts. Glass may be used, or other light-transmitting materials may be used.

[0028] FIG. 1(b) is a schematic cross-sectional view of an organic light-emitting device according to an embodiment of the present invention. Different from FIG. 1(a), since it includes an on-chip color filter, the first surfaces of the color filters are aligned, and the second surfaces are not aligned. In other words, the difference between the distance from the first surface of the first color filter to the substrate and the distance from the first surface of the second color filter to the substrate in the direction perpendicular to the main surface of the substrate is smaller than the difference between the distance from the second surface of the first color filter to the substrate and the distance from the second surface of the second color filter to the substrate in the direction perpendicular to the main surface of the substrate.

[0029] The difference between the distance from the first surface of the first color filter to the substrate and the distance from the first surface of the second color filter to the substrate in the direction perpendicular to the main surface of the substrate may be substantially 0.

[0030] The color filter layer may be composed of a resin cured at 100° C. or lower. This is because an on-chip color filter cannot be provided with a high-temperature heating process.

[0031] Since it is an on-chip color filter, a heating process that causes the components of the developer to thermally decompose cannot be provided, but the concentration of the organic alkali having a nitrogen atom and a hydroxyl group contained in the color filter layer is 108.2 ng / cm 2 less. The concentration of the organic alkali is preferably 40 ng / cm 2 or less, and more preferably 10 ng / cm 2 or less. Further, it may be 0.08 ng / cm 2 or more, and may be 0.01 ng / cm 2 or more. In the situation of using a developer containing an organic alkali, the organic alkali that has not thermally decomposed may not be completely removed only by the process of reducing the organic alkali. Therefore, the concentration of the organic alkali may be more than 0 ng / cm 2

[0032] The organic alkali may be reduced or removed by a process of reducing the organic alkali in the step of forming the color filter layer.

[0033] According to this embodiment, an organic light-emitting device equipped with an on-chip color filter can be made highly reliable. Reliability means that even during prolonged use, issues such as light spots are less likely to occur.

[0034] Figure 1(c) is a schematic diagram of an organic light-emitting device according to another embodiment of the present invention. The display panel 18, which is part of the organic light-emitting device, is bonded to the cover glass 17 by adhesive resin 21. The portion enclosed by the adhesive resin 21 may be a hollow layer, as shown in Figures 1(a) and (b). In Figure 1(c), the adhesive member is arranged to the side of the organic light-emitting device as an example, but the adhesive member may also be arranged on top of the organic light-emitting device. The adhesive resin may be made of acrylic resin, epoxy resin, or the like.

[0035] The organic light-emitting device includes a light-emitting region 22 and a non-light-emitting region 23, and dummy pixels may be provided in the non-light-emitting region. Pad electrodes or the like, which are connections to external circuits, may also be provided in the non-light-emitting region.

[0036] Figure 2 is a graph showing the relationship between tetramethylammonium hydroxide concentration and the number of defects.

[0037] On-chip color filters are formed by patterning a color filter on an OLED layer. A developer is used during the patterning process. Tetramethylammonium hydroxide is used as a component of this developer. Tetramethylammonium hydroxide will be denoted as TMAH below. TMAH is an organic alkali having a nitrogen atom and a hydroxyl group.

[0038] In on-glass color filters, the color filter is cured at a temperature higher than the decomposition temperature of TMAH, so TMAH is less likely to remain in the color filter. On the other hand, on-chip color filters are cured at a temperature lower than the decomposition temperature of TMAH, so TMAH is more likely to remain in the organic light-emitting device.

[0039] Figure 2 is a graph showing the relationship between TMAH concentration and the number of defects in process A, in which an on-chip color filter was formed using a method that does not utilize the present invention, and in processes B and C, in which an on-chip color filter was formed using the present invention. Note that "defects" refers to the number of defects in the organic light-emitting device that occurred after a certain period of time in an accelerated test under high temperature and high humidity conditions.

[0040] The curves in Figure 2 show the defect trends in the color filter layer that occurred after wafers fabricated using processes A to C were separated into individual pieces and stored for a certain period of time in a high-temperature, high-humidity environment at 85°C and 90% humidity. These individual pieces do not have the adhesive resin or cover glass shown in Figure 1(c) formed on them.

[0041] The horizontal axis of Figure 2 shows the residual TMAH (ng / cm³) for process A, where TMAH reduction in the color filter layer is insufficient; process B, where TMAH reduction treatment is applied during the formation of the color filter layer; and process C. 2 The graph shows the number of defects that occurred on the lens at each storage time (90h, 250h) at 85°C and 90% humidity. In other words, Process A is a comparative example, while Processes B and C are the results of the organic light-emitting apparatus according to the present invention. Note that a normal development process will have a TMAH reduction effect similar to a process in which TMAH reduction is insufficient.

[0042] The TMAH concentration on the horizontal axis was determined by extracting THAM from the wafer after each process and extracting the amount of TMAH using ion chromatography (IC method). The TMAH concentration per unit area of ​​the color filter layer was calculated from the measured TMAH values.

[0043] In process A, defects were observed at each storage time, but in processes B and C, the number of defects at each storage time was lower compared to process A.

[0044] Table 1 shows the results of each process and the amount of remaining TMAH (ng / cm³). 2 ) indicates.

[0045] [Table 1]

[0046] The amount of residual TMAH (ng / cm³) in the color filter layer 15 of process A (without TMAH reduction treatment), process B (with TMAH reduction treatment), and process C (with TMAH reduction treatment) is as follows: 2 These are shown as numerical values.

[0047] Table 1 shows that the TMAH residue level that reduces the occurrence of defects is 108.2 ng / cm³. 2 It is less than 40 ng / cm³. 2 The following is preferable: 10 ng / cm 2 The following is even more preferable. Furthermore, the TMAH residue level is below the detection limit of 0.08 ng / cm³. 2 The above is sufficient, and 0.01 ng / cm 2 The above is sufficient. Also, since it is a color filter manufactured using TMAH and the color filter layer contains residual TMAH, the concentration is 0 ng / cm². 2 More is better.

[0048] [Second Embodiment] Figure 3(a) is a schematic cross-sectional view of an organic light-emitting device according to another embodiment of the present invention. In this embodiment, the organic light-emitting device has a configuration in which the surface layer of the second resin layer 16 is sealed with a cover glass 17 via a hollow layer 24a. In this embodiment, an on-chip color filter is used, but the difference in distance from the substrate to the color filter on the second surface of the color filter is omitted.

[0049] [Third Embodiment] Figure 3(b) is a schematic cross-sectional view of an organic light-emitting device according to another embodiment of the present invention. In this embodiment, a lens 25 is provided on a second resin layer 16. The lens 25 focuses the light emitted by the organic light-emitting element. In Figure 3(b), a convex lens is shown as an example, but a concave lens may also be used. In addition, although a lens is formed for each organic light-emitting element, multiple lenses may be formed for a single organic light-emitting element. Depending on the size, the lenses may be called microlenses. The lenses may be made of, for example, organic materials or inorganic films such as SiN.

[0050] The hollow layer 24a may contain a gas. It can also be said that it is filled with a gas. Since the lens 25 exerts a light-gathering effect, it is preferable that the refractive index is close to 1. A structure having such a hollow layer is also called a hollow structure. The hollow layer is essentially an air gap. The hollow structure may be arranged in the order of lens, gas such as air, and protective member. The protective member is bonded to the substrate, protective layer, etc., by an adhesive member described later. In this embodiment, an on-chip color filter is used, but the difference in distance from the substrate to the color filter on the second surface of the color filter is omitted.

[0051] [Fourth Embodiment] Figure 3(c) is a schematic cross-sectional view of an organic light-emitting device according to another embodiment of the present invention. It is the same as the third embodiment except that a sealing layer 24b is formed on the lens 25 instead of a hollow layer. The sealing layer 24b may be made of a resin such as acrylic resin or epoxy resin. The display device 18 is sealed with a cover glass 17 via the sealing layer 24b. It is preferable that the refractive index of the sealing layer 24b is large compared to the refractive index of the lens. Specifically, it is preferable that the refractive index of the sealing layer is smaller than the refractive index of the lens, and preferably close to 1. It is also preferable that the refractive index of the sealing layer is smaller than the average value of the refractive index of the lens and the refractive index of air. In other words, it is preferable that the refractive index of the sealing layer is closer to the refractive index of air than the refractive index of the lens. It is preferable that this sealing layer 24b does not allow moisture, oxygen, etc. to pass through, but it may be permeable in the sense that complete protective performance is not required. The higher the permeability of this sealing layer 24b, the higher the possibility of reaction between the organic alkali in the developing solution and moisture, which makes the problems of the present invention more pronounced. In this embodiment, an on-chip color filter is used, but the difference in distance from the substrate to the color filter on the second surface of the color filter is omitted.

[0052] Figure 3(d) is a schematic cross-sectional view of an organic light-emitting device according to another embodiment of the present invention. No lens is formed on the surface of the second planarization layer 16, and the display device 18 is sealed with a cover glass 17 via a sealing layer 24b. In this embodiment, an on-chip color filter is used, but the difference in distance from the substrate to the color filter on the second surface of the color filter is omitted.

[0053] [Color filter manufacturing process] The method for manufacturing a color filter for an organic light-emitting device according to the present invention will be described below with reference to Figures 4(a) to 4(c). The method for manufacturing an organic light-emitting device according to this embodiment includes the steps of forming an organic light-emitting element on the main surface of an insulating layer and forming a color filter layer on the organic light-emitting element. The step of forming the color filter layer is a photolithography step and includes the steps of applying a resin to the organic light-emitting element, selectively exposing the resin through a photomask, and developing the resin using a developer solution having an organic alkali containing nitrogen atoms and hydroxyl groups. The method for manufacturing an organic light-emitting device according to the present invention includes the step of reducing the organic alkali from the color filter layer after the developing step. In this embodiment, TMAH is used as the organic alkali. However, the present invention is not limited thereto.

[0054] Figure 4(a) is a schematic diagram showing the process for manufacturing a green filter for an organic light-emitting device according to one embodiment of the present invention. A substrate 10 is prepared, and a drive circuit layer 11 including a drive circuit is formed on the substrate 10. Next, an OLED layer 12 including electrodes and an organic layer is formed on the drive circuit layer 11. Next, a protective layer 13 is formed on the OLED layer 12 by a film deposition method such as CVD or sputtering. The temperature when forming the protective layer 13 is preferably 110°C or lower, and more preferably 100°C or lower. Next, a first resin layer 14 is formed on the protective layer 13 by a film deposition method such as spin coating. Next, a green filter 15a, which is the first color filter layer, is formed on the first resin layer 14.

[0055] The color filter is created by applying organic material containing pigments using a spin-coating method, patterning it using photolithography, and developing it with an alkaline developer containing TMAH.

[0056] After the development process, the surface of the color filter is physically cleaned with a two-fluid rinse using pure water to reduce the amount of TMAH remaining on the surface and sides of the green filter 15a. The cleaning solution may contain 80% or more pure water. The cleaning process may be carried out by methods such as a two-fluid rinse or immersion, with a two-fluid rinse being preferred. The same applies to the cleaning process of other color filters.

[0057] The color filter after the development process can be formed by light irradiation or firing at 110°C or lower, more preferably at 100°C or lower. The step of heating the color filter layer is preferably a step of heating at a temperature below the glass transition temperature of the organic compound constituting the organic layer of the organic light-emitting element.

[0058] Figure 4(b) is a schematic diagram showing the process of forming the blue filter of the organic light-emitting element. After the formation of the green filter 15a, the second color filter layer, the blue filter 15b, is formed. The color filters are made by applying organic material containing pigments using a spin coating method or the like, patterning them using photolithography, and developing them with an alkaline developer containing TMAH. After the development process, the surface of the color filters is washed with a nanospray to reduce the amount of TMAH remaining on the surfaces of the green filter 15a and the blue filter 15b, as well as on the sides of the green filter 15a and the blue filter 15b.

[0059] The color filter after the development process can be formed by light irradiation or firing at 130°C or lower, more preferably at 110°C or lower. The step of heating the color filter layer is preferably a step of heating at a temperature below the glass transition temperature of the organic compound constituting the organic layer of the organic light-emitting element.

[0060] Figure 4(c) is a schematic diagram showing the process of forming the red filter of the organic light-emitting element. After the formation of the blue filter 15b, the third color filter layer, the red filter 15c, is formed. The color filters are made by applying organic material containing pigments using a spin coating method or the like, patterning them using photolithography, and developing them with an alkaline developer containing TMAH. After the development process, the surface of the color filters is washed with a nanospray to reduce the amount of TMAH remaining on the surfaces of the green filter 15a, blue filter 15b, and red filter 15c.

[0061] The color filter after the development process can be formed by light irradiation or firing at 130°C or lower, more preferably at 110°C or lower. The step of heating the color filter layer is preferably a step of heating at a temperature below the glass transition temperature of the organic compound constituting the organic layer of the organic light-emitting element.

[0062] Since the color filter according to this embodiment is an on-chip color filter, the temperature during the heating process of the color filter can be lower than or equal to the decomposition temperature of the developer.

[0063] Figure 4(d) is a plan view of an example of an organic light-emitting device according to this embodiment. In this embodiment, the green, blue, and red color filters can be made to have rounded corners, for example, to form areas 26 without color filters (Figure 4(d)). This makes it easier for the rinsing solution to circulate around the color filter boundaries during the washing process after development, thereby promoting the removal of TMAH. The areas 26 without color filters may be filled with a second resin layer that is placed after the formation of the color filters. For example, the green color filter may be the first color filter, the blue color filter the second color filter, and the red color filter the third color filter. In this case, the organic light-emitting device has a second resin layer placed on top of the first color filter 27 and the second color filter 28, and a second resin layer also placed between the first color filter 27 and the second color filter 28. The second resin layer may be a so-called planarization layer.

[0064] The area 26 without a color filter may also be formed between the first color filter 27 and the third color filter 29. A second resin layer may be placed in this area between the first color filter 27 and the third color filter 29. The second resin layer may cover at least the entire display area. That is, the second resin layer is also placed on top of the third color filter. It can be said that the second resin layer is continuously placed across the entire display area.

[0065] According to this embodiment, an organic light-emitting device with a reduced TMAH concentration can be manufactured.

[0066] [Configuration of organic light-emitting element] An organic light-emitting element is provided on a substrate by forming an insulating layer, a first electrode, an organic compound layer, and a second electrode. A protective layer, a color filter, a microlens, etc., may be provided on the cathode. If a color filter is provided, a planarization layer may be provided between it and the protective layer. The planarization layer can be made of acrylic resin or the like. The same applies when a planarization layer is provided between the color filter and the microlens.

[0067] [substrate] Examples of substrates include quartz, glass, silicon wafers, resins, and metals. The substrate may also be equipped with switching elements such as transistors and wiring, and an insulating layer may be provided on top of them. The insulating layer can be made of any material that allows for the formation of contact holes between it and the first electrode, while ensuring insulation from wiring that is not connected. For example, resins such as polyimide, silicon oxide, and silicon nitride can be used.

[0068] [electrode] A pair of electrodes can be used. The pair of electrodes may be an anode and a cathode. When an electric field is applied in the direction in which the organic light-emitting element emits light, the electrode with the higher potential is the anode, and the other is the cathode. Alternatively, the electrode that supplies holes to the light-emitting layer can be the anode, and the electrode that supplies electrons can be the cathode.

[0069] For the anode, materials with the largest possible work function are preferable. For example, elemental metals such as gold, platinum, silver, copper, nickel, palladium, cobalt, selenium, vanadium, and tungsten, or mixtures containing these, or alloys combining them, as well as metal oxides such as tin oxide, zinc oxide, indium oxide, tin-indium oxide (ITO), and zinc-indium oxide can be used. Conductive polymers such as polyaniline, polypyrrole, and polythiophene can also be used.

[0070] These electrode materials may be used individually or in combination of two or more types. Furthermore, the anode may consist of a single layer or multiple layers.

[0071] When used as a reflective electrode, materials such as chromium, aluminum, silver, titanium, tungsten, molybdenum, or alloys or laminates thereof can be used. It is also possible to use the above materials as a reflective film without serving as an electrode. Furthermore, when used as a transparent electrode, oxide transparent conductive layers such as indium tin oxide (ITO) or indium zinc oxide can be used, but are not limited to these. Photolithography can be used to form the electrodes.

[0072] On the other hand, materials with a small work function are preferred for the cathode. Examples include alkali metals such as lithium, alkaline earth metals such as calcium, and elemental metals or mixtures containing aluminum, titanium, manganese, silver, lead, and chromium. Alternatively, alloys combining these elemental metals can also be used. For example, magnesium-silver, aluminum-lithium, aluminum-magnesium, silver-copper, and zinc-silver can be used. Metal oxides such as indium tin oxide (ITO) can also be used. These electrode materials may be used individually or in combination of two or more. The cathode may also be a single-layer or multi-layer structure. Among these, silver is preferred, and a silver alloy is even more preferred to reduce silver aggregation. The alloy ratio is not important as long as silver aggregation is reduced. For example, the ratio of silver to other metals may be 1:1, 3:1, etc.

[0073] The cathode may be a top-emission element using an oxide conductive layer such as ITO, or a bottom-emission element using a reflective electrode such as aluminum (Al), and is not particularly limited. The method for forming the cathode is not particularly limited, but using DC and AC sputtering methods is more preferable because it provides good film coverage and makes it easier to reduce resistance.

[0074] [Organic layer] The organic layer may be formed as a single layer or as multiple layers. If there are multiple layers, they may be called a hole injection layer, a hole transport layer, an electron blocking layer, an emissive layer, a hole blocking layer, an electron transport layer, or an electron injection layer, depending on their function. The organic layer may also be called an organic compound layer. The organic layer is mainly composed of organic compounds, but may also contain inorganic atoms and inorganic compounds. For example, it may contain copper, lithium, magnesium, aluminum, iridium, platinum, molybdenum, zinc, etc. The organic layer may be placed between the first electrode and the second electrode, or it may be placed in contact with the first electrode and the second electrode.

[0075] The organic compounds constituting the organic layer preferably have high glass transition temperatures. Specifically, it is preferable that the layer consists only of organic compounds with a glass transition temperature of 100°C or higher, more preferably of organic compounds with a glass transition temperature of 110°C or higher, and even more preferably of organic compounds with a glass transition temperature of 130°C or higher. This is because using organic compounds that are less affected by the heating process of the on-chip color filter leads to improved reliability.

[0076] [Protective layer] A protective layer may be provided on the cathode. For example, by bonding glass with a desiccant to the cathode, the intrusion of water and other substances into the organic compound layer can be reduced, thereby reducing the occurrence of display defects. In another embodiment, a passivation film such as silicon nitride may be provided on the cathode to reduce the intrusion of water and other substances into the organic compound layer. For example, after forming the cathode, it may be transported to another chamber without breaking the vacuum and a silicon nitride film with a thickness of 2 μm may be formed by the CVD method to serve as a protective layer. A protective layer may also be provided using atomic deposition (ALD) after the film formation by the CVD method. The material of the film formed by the ALD method is not limited, but may be silicon nitride, silicon oxide, aluminum oxide, etc. Silicon nitride may be further formed on the film formed by the ALD method by the CVD method. The film formed by the ALD method may have a thinner film thickness than the film formed by the CVD method. Specifically, it may be 50% or less, or even 10% or less.

[0077] [Color Filter] A color filter may be provided on top of the protective layer. For example, a color filter that takes into account the size of the organic light-emitting element may be provided on a separate substrate and bonded to the substrate on which the organic light-emitting element is provided, or a color filter may be patterned on the protective layer as described above using photolithography technology. The color filter may be made of polymer.

[0078] [Planarization layer] A planarizing layer may be provided between the color filter and the protective layer. The planarizing layer is provided to reduce the unevenness of the layer below. Without limiting its purpose, it may also be called a resin layer based on its material. The planarizing layer may be composed of an organic compound, which may be low molecular weight or high molecular weight, but high molecular weight is preferred.

[0079] The planarization layer may be provided above or below the color filter, and its constituent materials may be the same or different. Specifically, examples include polyvinylcarbazole resin, polycarbonate resin, polyester resin, ABS resin, acrylic resin, polyimide resin, phenolic resin, epoxy resin, silicone resin, urea resin, etc.

[0080] [lens] An organic light-emitting device may have optical elements such as lenses on its light-emitting side. The lenses may be made of acrylic resin, epoxy resin, or the like. The lenses may be used to increase the amount of light extracted from the organic light-emitting device or to control the direction of the extracted light. The lenses may have a hemispherical shape. If the lens has a hemispherical shape, among the tangents tangent to the hemisphere, there is a tangent parallel to the insulating layer, and the point of contact between that tangent and the hemisphere is the vertex of the lens. The vertex of the lens can be similarly determined in any cross-sectional view. That is, among the tangents tangent to the semicircle of the lens in the cross-sectional view, there is a tangent parallel to the insulating layer, and the point of contact between that tangent and the semicircle is the vertex of the lens.

[0081] Furthermore, the midpoint of a lens can also be defined. In the cross-section of the lens, a line segment can be imagined from the point where one arc ends to the point where another arc ends, and the midpoint of this line segment can be called the midpoint of the lens. The cross-section used to determine the vertices and midpoints may be a cross-section perpendicular to the insulating layer.

[0082] [Opposite substrate] A counter substrate may be provided on the planarized layer. The counter substrate is called a counter substrate because it is provided in a position corresponding to the aforementioned substrate. The constituent material of the counter substrate may be the same as that of the aforementioned substrate. The counter substrate may be the second substrate if the aforementioned substrate is referred to as the first substrate.

[0083] [Method for manufacturing an organic layer] The organic layers (hole injection layer, hole transport layer, electron blocking layer, light-emitting layer, hole blocking layer, electron transport layer, electron injection layer, etc.) constituting the organic light-emitting element according to one embodiment of the present invention are formed by the method shown below.

[0084] The organic layer constituting the organic light-emitting element according to one embodiment of the present invention can be formed using a dry process such as vacuum deposition, ionization deposition, sputtering, or plasma deposition. Alternatively, instead of a dry process, a wet process can be used in which the layer is formed by dissolving it in a suitable solvent and applying a known coating method (e.g., spin coating, dipping, casting, LB method, inkjet method, etc.).

[0085] When layers are formed using methods such as vacuum deposition or solution coating, crystallization is less likely to occur, resulting in excellent stability over time. Furthermore, when forming films using coating methods, it is possible to combine the film with an appropriate binder resin.

[0086] Examples of the binder resins mentioned above include, but are not limited to, polyvinylcarbazole resin, polycarbonate resin, polyester resin, ABS resin, acrylic resin, polyimide resin, phenolic resin, epoxy resin, silicone resin, and urea resin.

[0087] Furthermore, these binder resins may be used individually as homopolymers or copolymers, or as a mixture of two or more types. Additionally, known additives such as plasticizers, antioxidants, and UV absorbers may be used in combination as needed.

[0088] [Pixel circuit] The light-emitting device may have a pixel circuit connected to a light-emitting element. The pixel circuit may be an active-matrix type that independently controls the light emission of a first light-emitting element and a second light-emitting element. The active-matrix type circuit may be voltage-programmed or current-programmed. The drive circuit has a pixel circuit for each pixel. The pixel circuit may have a light-emitting element, a transistor that controls the light emission brightness of the light-emitting element, a transistor that controls the light emission timing, a capacitor that holds the gate voltage of the transistor that controls the light emission brightness, and a transistor for connecting to GND without going through the light-emitting element.

[0089] The light-emitting device has a display area and a peripheral area arranged around the display area. The display area has a pixel circuit, and the peripheral area has a display control circuit. The mobility of the transistors constituting the pixel circuit may be smaller than the mobility of the transistors constituting the display control circuit.

[0090] The slope of the current-voltage characteristics of the transistors constituting the pixel circuit can be smaller than the slope of the current-voltage characteristics of the transistors constituting the display control circuit. The slope of the current-voltage characteristics can be measured using the so-called Vg-Ig characteristic.

[0091] The transistors that make up the pixel circuit are transistors connected to light-emitting elements, such as the first light-emitting element.

[0092] [Pixels] The organic light-emitting device has multiple pixels. Each pixel has subpixels that emit light of a different color from the others. The subpixels may each have, for example, RGB light-emitting colors.

[0093] A pixel emits light in a region also called the pixel aperture. This region is the same as the first region. The pixel aperture may be 15 μm or less, or 5 μm or more. More specifically, it may be 11 μm, 9.5 μm, 7.4 μm, 6.4 μm, etc.

[0094] The distance between subpixels may be 10 μm or less, specifically 8 μm, 7.4 μm, or 6.4 μm.

[0095] Pixels can take on known arrangements in a plan view. For example, they may be in a stripe arrangement, delta arrangement, pentile arrangement, or Bayer arrangement. The shape of subpixels in a plan view may be any known shape. For example, rectangles, rhombuses, hexagons, etc. Of course, even if it is not a precise shape, if it is close to a rectangle, it is included in the category of rectangles. The shape of subpixels and the pixel arrangement can be used in combination.

[0096] The following are examples of applications of an organic light-emitting device according to one embodiment of the present invention. However, these are not the only examples of applications.

[0097] Figure 5 is a schematic diagram showing an example of a display device according to this embodiment. The display device 1000 may have a touch panel 1003, a display panel 1005, a frame 1006, a circuit board 1007, and a battery 1008 between an upper cover 1001 and a lower cover 1009. Flexible printed circuits FPCs 1002 and 1004 are connected to the touch panel 1003 and the display panel 1005. Transistors are printed on the circuit board 1007. The battery 1008 does not need to be provided if the display device is not a portable device, or it may be provided in a different location even if it is a portable device.

[0098] The display device according to this embodiment may have a color filter having red, green, and blue colors. The color filter may have the red, green, and blue colors arranged in a delta array.

[0099] The display device according to this embodiment may be used in the display unit of a mobile terminal. In that case, it may have both display and operation functions. Examples of mobile terminals include smartphones and other mobile phones, tablets, and head-mounted displays.

[0100] The display device according to this embodiment may be used in the display unit of an imaging device having an optical unit with multiple lenses and an image sensor that receives light that has passed through the optical unit. The imaging device may have a display unit that displays information acquired by the image sensor. Furthermore, the display unit may be a display unit exposed to the outside of the imaging device or a display unit located inside the viewfinder. The imaging device may be a digital camera or a digital video camera.

[0101] Figure 6(a) is a schematic diagram showing an example of an imaging device according to this embodiment. The imaging device 1100 may include a viewfinder 1101, a rear display 1102, an operation unit 1103, and a housing 1104. The viewfinder 1101 may have a display device according to this embodiment. In that case, the display device may display not only the image to be captured, but also environmental information, imaging instructions, etc. Environmental information may include the intensity of ambient light, the direction of ambient light, the speed at which the subject is moving, the possibility of the subject being obscured by an obstacle, etc.

[0102] Since the optimal timing for imaging is very short, it is best to display the information as quickly as possible. Therefore, it is preferable to use a display device using the organic light-emitting element of the present invention, because organic light-emitting elements have a fast response speed. Display devices using organic light-emitting elements can be used more suitably than liquid crystal display devices, which require a fast display speed.

[0103] The imaging device 1100 has an optical section (not shown). The optical section has multiple lenses that form an image on the image sensor housed in the housing 1104. The focus can be adjusted by adjusting the relative positions of the multiple lenses. This operation can also be performed automatically. The imaging device may also be called a photoelectric converter. The photoelectric converter may not capture images sequentially, but may include imaging methods such as detecting the difference from the previous image or extracting from an image that is always being recorded.

[0104] Figure 6(b) is a schematic diagram showing an example of an electronic device according to this embodiment. The electronic device 1200 has a display unit 1201, an operation unit 1202, and a housing 1203. The housing 1203 may have a circuit, a printed circuit board having the circuit, a battery, and a communication unit. The operation unit 1202 may be a button or a touch panel type response unit. The operation unit may also be a biometric recognition unit that recognizes fingerprints to unlock or otherwise perform actions. An electronic device having a communication unit can also be called a communication device. The electronic device may further have a camera function by including a lens and an image sensor. Images captured by the camera function are displayed on the display unit. Examples of electronic devices include smartphones and laptop computers.

[0105] Figure 7 is a schematic diagram showing an example of a display device according to this embodiment. Figure 7(a) is a display device such as a television monitor or a PC monitor. The display device 1300 has a frame 1301 and a display unit 1302. The light-emitting device according to this embodiment may be used for the display unit 1302.

[0106] It has a frame 1301 and a base 1303 that supports the display unit 1302. The base 1303 is not limited to the form shown in Figure 5(a). The bottom edge of the frame 1301 may also serve as the base.

[0107] Furthermore, the frame 1301 and the display section 1302 may be curved. Their radius of curvature may be between 5000 mm and 6000 mm.

[0108] Figure 7(b) is a schematic diagram showing another example of the display device according to this embodiment. The display device 1310 in Figure 7(b) is configured to be foldable and is a so-called foldable display device. The display device 1310 has a first display unit 1311, a second display unit 1312, a housing 1313, and a bending point 1314. The first display unit 1311 and the second display unit 1312 may have light-emitting devices according to this embodiment. The first display unit 1311 and the second display unit 1312 may be a single display device without seams. The first display unit 1311 and the second display unit 1312 can be separated at a bending point. The first display unit 1311 and the second display unit 1312 may each display different images, or the first and second display units may together display a single image.

[0109] Figure 8 is a schematic diagram showing an example of a lighting device according to this embodiment. The lighting device 1400 may include a housing 1401, a light source 1402, a circuit board 1403, an optical film 1404, and a light diffusion section 1405. The light source may have an organic light-emitting element according to this embodiment. The optical filter may be a filter that improves the color rendering of the light source. The light diffusion section can effectively diffuse the light from the light source, such as for lighting up, and deliver light over a wide area. The optical filter and light diffusion section may be provided on the light-emitting side of the lighting. A cover may be provided on the outermost part as needed.

[0110] The lighting device is, for example, a device for illuminating a room. The lighting device may emit white light, cool white light, or any other color from blue to red. It may have a dimming circuit to adjust the brightness of these lights. The lighting device may have the organic light-emitting element of the present invention and a power supply circuit connected thereto. The power supply circuit is a circuit that converts AC voltage to DC voltage. White light has a color temperature of 4200K, and cool white light has a color temperature of 5000K. The lighting device may have a color filter.

[0111] Furthermore, the lighting device according to this embodiment may have a heat dissipation section. The heat dissipation section releases heat from inside the device to the outside, and examples include metals with high specific heat, liquid silicon, etc.

[0112] Figure 8(b) is a schematic diagram of an automobile, which is an example of a mobile body according to this embodiment. The automobile has a taillight, which is an example of a lighting device. The automobile 1500 has a taillight 1501, and may be configured to illuminate when the brakes are applied or the like.

[0113] The tail lamp 1501 may have an organic light-emitting element according to this embodiment. The tail lamp may have a protective member to protect the organic EL element. The protective member has a reasonably high strength and can be made of any transparent material, but it is preferably made of polycarbonate or the like. A frangic acid derivative, an acrylonitrile derivative, or the like may be mixed with the polycarbonate.

[0114] The automobile 1500 may have a body 1503 and windows 1502 attached thereto. The windows may be transparent displays, unless they are windows for checking the front and rear of the automobile. The transparent displays may have organic light-emitting elements according to this embodiment. In this case, the constituent materials such as electrodes of the organic light-emitting element are made of transparent members.

[0115] The mobile body according to this embodiment may be a ship, aircraft, drone, etc. The mobile body may have a body and a light fixture installed on the body. The light fixture may emit light to indicate the position of the body. The light fixture has an organic light-emitting element according to this embodiment.

[0116] Referencing Figure 9, examples of applications of the display devices of each embodiment described above will be explained. The display device can be applied to systems that can be worn as wearable devices such as smart glasses, HMDs, and smart contacts. The imaging display device used in such applications comprises an imaging device capable of photoelectric conversion of visible light and a display device capable of emitting visible light.

[0117] Figure 9(a) illustrates a pair of glasses 1600 (smart glasses) according to one application example. An imaging device 1602, such as a CMOS sensor or SPAD, is provided on the front surface of the lens 1601 of the glasses 1600. In addition, the display devices of each embodiment described above are provided on the back surface of the lens 1601.

[0118] The eyeglasses 1600 further include a control device 1603. The control device 1603 functions as a power supply that provides power to the imaging device 1602 and the display device according to each embodiment. The control device 1603 also controls the operation of the imaging device 1602 and the display device. The lens 1601 has an optical system formed therein for focusing light onto the imaging device 1602.

[0119] Figure 9(b) illustrates a pair of glasses 1610 (smart glasses) according to one application example. The glasses 1610 have a control device 1612, which is equipped with an imaging device equivalent to an imaging device 1602 and a display device. The lens 1611 has an optical system formed therein for projecting light emitted from the imaging device and the display device within the control device 1612, and an image is projected onto the lens 1611. The control device 1612 functions as a power supply to provide power to the imaging device and the display device, and also controls the operation of the imaging device and the display device. The control device may have a gaze detection unit that detects the wearer's gaze. Gaze detection may use infrared light. The infrared light emitter emits infrared light towards the eyeball of the user who is fixating on the displayed image. The imaging unit, which has a photodetector, detects the reflected light from the eyeball of the emitted infrared light, thereby obtaining an image of the eyeball. By having a reduction means that reduces the light from the infrared light emitter to the display unit in planar view, the degradation of image quality is reduced.

[0120] The user's gaze towards the displayed image is detected from an image of the eyeball obtained by imaging with infrared light. Any known method can be applied to gaze detection using an image of the eyeball. For example, a gaze detection method based on the Purkinje image obtained by the reflection of the irradiated light from the cornea can be used.

[0121] More specifically, gaze detection processing is performed based on the pupil-corneal reflection method. Using the pupil-corneal reflection method, a gaze vector representing the orientation (rotation angle) of the eyeball is calculated based on the pupil image and Purkinje image contained in the captured image of the eyeball, thereby detecting the user's gaze.

[0122] A display device according to one embodiment of the present invention includes an imaging device having a light-receiving element, and may control the display image of the display device based on the user's gaze information from the imaging device.

[0123] Specifically, the display device determines a first field of view that the user is fixated on, and a second field of view other than the first field of view, based on gaze information. The first and second field of view may be determined by the control device of the display device, or they may be determined by an external control device and received by the display device. Within the display area of ​​the display device, the display resolution of the first field of view may be controlled to be higher than the display resolution of the second field of view. In other words, the resolution of the second field of view may be lower than that of the first field of view.

[0124] Furthermore, the display area has a first display area and a second display area different from the first display area, and based on gaze information, the area with higher priority is determined from the first display area and the second display area. The first display area and the second display area may be determined by the control device of the display device, or they may be determined by an external control device and received. The resolution of the high-priority area may be controlled to be higher than the resolution of the areas other than the high-priority area. In other words, the resolution of areas with relatively lower priority may be set lower.

[0125] AI may be used to determine the primary field of view and high-priority areas. The AI ​​may be a model configured to estimate the angle of gaze and the distance to the target object at the end of the line of sight from the image of the eye, using the image of the eye and the direction the eye was actually looking in that image as training data. The AI ​​program may be installed in the display device, the imaging device, or an external device. If installed in an external device, it will be transmitted to the display device via communication.

[0126] When display control is based on visual detection, this method is preferably applicable to smart glasses that further include an imaging device for capturing images of the surrounding environment. The smart glasses can display the captured external information in real time.

[0127] As described above, by using the device employing the organic light-emitting element according to this embodiment, stable display with good image quality is possible even during long-term display. [Explanation of Symbols]

[0128] 10 circuit boards 11. Drive circuit layer 12 OLED layers 13 Protective layer 14 First resin layer 15 Color Filter Layers 15a Green filter 15b Blue filter 15c Red Filter 16 Second resin layer 17 Cover glass 18 Display Panel 19. First surface of the color filter 20. The second side of the color filter 21 Adhesive resin 22 Emitting regions 23 Non-emission region 24a hollow layer 24b Sealing layer 25 lenses 26 Area without a color filter 27. First Color Filter 28. Second Color Filter 29. The third color filter 1000 display devices 1001 Top cover 1002 Flexible Printed Circuits 1003 Touch Panel 1004 Flexible Printed Circuit 1005 Display Panel 1006 Frame 1007 Circuit board 1008 Battery 1009 Lower cover 1100 Imaging device 1101 Viewfinder 1102 Rear display 1103 Operation section 1104 cabinet 1200 Electronic equipment 1201 Display section 1202 Operation unit 1203 enclosure 1300 display device 1301 Picture frame 1302 Display section 1303 Base 1310 Display device 1311 First display section 1312 Second display section 1313 cabinet 1314 Inflection point 1400 Lighting devices 1401 cabinet 1402 Light source 1403 Circuit board 1404 Optical Film 1405 Light Diffusion Section 1500 cars 1501 Taillight 1502 Window 1503 Body 1600 Smart Glasses 1601 Lens 1602 Imaging device 1603 Control device 1610 Smart Glasses 1611 Lens 1612 Control device

Claims

[Claim 1] The material comprises an insulating layer, a first organic light-emitting element and a second organic light-emitting element disposed on the main surface of the insulating layer, a color filter layer having a first color filter superimposed on the first organic light-emitting element in a plan view and transmitting a first wavelength, and a second color filter superimposed on the second organic light-emitting element in a plan view and transmitting a second wavelength different from the first wavelength, The first color filter and the second color filter each have a first surface facing the organic light-emitting element and a second surface opposite to the first surface. An organic light-emitting device wherein the difference between the distance between the first surface of the first color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, and the distance between the first surface of the second color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, is smaller than the difference between the distance between the second surface of the first color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, and the distance between the second surface of the second color filter and the insulating layer in a direction perpendicular to the main surface of the insulating layer, The concentration of the organic alkali containing nitrogen atoms and hydroxyl groups contained in the color filter layer is 108.2 ng / cm³. ２ An organic light-emitting device characterized by being less than [amount].

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