Classifications

• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
  • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
  • H10K59/30—Devices specially adapted for multicolour light emission
  • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]

Definitions

• Color filter substrate for organic-elect mouth luminescence device
• the present invention relates to a color filter substrate for an organic EL element used in an organic electoluminescence (hereinafter abbreviated as EL) display device.
• EL organic electoluminescence
• An organic EL element has a structure in which a light emitting layer is sandwiched between an anode and a cathode in principle.
• (1) a method in which light emitting layers that emit each of the three primary colors are arranged, and (2) a light emitting layer that emits white light.
• the color filter method (2) and the color conversion method (3) are attracting attention. Since these methods only require the use of a single type of light-emitting layer, there is no problem like the method (1) above.
• the color conversion method (3) has a problem that the phosphor in the color conversion layer is excited by external light and the contrast is lowered. For this reason, a colored layer is generally formed between the color conversion layer and the transparent substrate. In addition, the color purity can be improved by providing a colored layer.
• the color conversion layer is relatively thick, there is a problem in that the light use efficiency is low because light emitted from the phosphor is scattered due to scattering.
• a color conversion layer may be formed between the light emitting layer and the colored layer for hue correction.
• the color conversion layer is relatively thick, light leaks due to light scattering and the like.
• hue correction and luminance that is, light extraction efficiency are incompatible with each other, and it is difficult to achieve both improvement in color purity and luminance.
• Examples of improving the luminance by increasing the light extraction efficiency include a method of providing a light-shielding portion having reflectivity between the color conversion layers (see, for example, Patent Document 1), A method of adjusting the refractive index of the layers formed between them (for example, see Patent Document 2) has been proposed.
• Patent Document 1 A method of adjusting the refractive index of the layers formed between them (for example, see Patent Document 2) has been proposed.
• Patent Document 2 A method of adjusting the refractive index of the layers formed between them.
• no example has been reported in which the brightness is improved by the configuration of the color conversion layer itself.
• Patent Document 1 Japanese Patent Application Laid-Open No. 2004-288447
• Patent Document 2 Japanese Patent Laid-Open No. 2003-077680
• Patent Document 3 Japanese Patent Laid-Open No. 9-63770
• the present invention has been made in view of the above problems, and it is possible to obtain an organic EL display device having high luminance and high efficiency, and is applicable to an organic EL display device having a white light emitting layer.
• the main objective is to provide a color filter substrate for organic EL elements that has an excellent balance of color characteristics of the three primary colors. Means for solving the problem
• the present invention provides a transparent base material, a colored layer formed in a pattern on the transparent base material, and a color conversion layer partially formed on the colored layer.
• the present invention provides a color filter substrate for an organic EL device characterized by comprising:
• the organic EL display device since the color conversion layer is partially formed on the colored layer, the organic EL display device using such a color filter substrate for an organic EL element emits light from the light emitting layer. A part of them pass through the color conversion layer. At this time, incident light is absorbed by the color conversion phosphor in the color conversion layer and fluorescence is emitted. This fluorescence is scattered by other color conversion phosphors in the color conversion layer and from the side of the color conversion layer. Leaks. In the present invention, since the color conversion layer is partially formed on the colored layer, this scattered and leaked light can be emitted from a region where the color conversion layer on the colored layer is not formed.
• the organic EL element color filter substrate of the present invention it is possible to provide an organic EL display device with high luminance and high efficiency.
• the above-described configuration makes it possible to achieve both high color purity and high light extraction efficiency.
• the color filter substrate for an organic EL element of the present invention is used for an organic EL display device having a white light emitting layer, for example, white light generally emitted from the white light emitting layer is composed of red light and blue light, and green light.
• white light generally emitted from the white light emitting layer is composed of red light and blue light, and green light.
• each of the red color conversion unit and the blue color conversion unit is provided among the red color conversion unit, the green color conversion unit, and the blue color conversion unit.
• the green light component can be increased by forming partly on the colored part and making the area of the green color conversion part larger than the area of each of the red color conversion part and the blue color conversion part. Therefore, it is possible to provide an organic EL display device that is excellent in the balance of the color characteristics of the three primary colors.
• the color conversion layer is formed in a pattern on the colored layer. Since the color conversion layer is formed in a pattern on the colored layer, the surface area of the color conversion layer is increased, so that light scattered and leaked in the color conversion layer can be more efficiently This is because it can be taken out and the luminance can be further improved.
• the colored layer has a red colored portion, a green colored portion, and a blue colored portion, and the color conversion layer is partially formed on the red colored portion. And at least one of a green color conversion portion partially formed on the green coloring portion.
• Each color conversion part is partially formed on each colored part, so that light scattered and leaked in each color conversion part can be taken out efficiently, improving the brightness of red light and green light It is because it can be made.
• the red color conversion part may not be formed on the red coloring part. This is because when the incident light is white light including components of red light and blue light, for example, a red color conversion unit that converts the incident light into red light may not be formed. In addition, it is advantageous in terms of cost because it is not necessary to repeat the patterning process, and the manufacturing process is simplified.
• a flat layer is formed on the color conversion layer. This is because the colored layer and the color conversion layer can be protected by forming the planarizing layer.
• the influence at the time of forming the transparent electrode layer is reduced, and the occurrence of uneven thickness at the time of forming the organic EL layer is prevented. Because it can.
• the flat layer may have a light scattering property. Since the flat layer has light scattering properties, the light converted by the color conversion layer is prevented from leaking in a direction horizontal to the transparent substrate, and the direction perpendicular to the transparent substrate (observation) This is because it is possible to efficiently extract light to the person side.
• the colored layer has a red colored portion, a green colored portion, and a blue colored portion
• the color conversion layer includes a green color converted portion formed on the green colored portion.
• the area of the green color conversion part is larger than the area of each of the red color conversion part formed on the red color part and the blue color conversion part formed on the blue color part. It is preferable.
• the color filter substrate for an organic EL element of the present invention is used in, for example, an organic EL display device having a white light emitting layer
• white light generally emitted from the white light emitting layer is red light and Although it is often composed of blue light and has a small amount of green light component
• a green color conversion unit that converts incident light into green light is formed, and the area of this green color conversion unit is defined as a red color conversion unit and a blue color. This is because the green light component can be increased by making the area larger than each area of the color converter. As a result, it is possible to provide an organic EL display device that is excellent in the balance of the color characteristics of the three primary colors.
• the red color conversion portion and the blue color conversion portion are not formed. That is, the color conversion layer preferably has only a green color conversion part formed on the green coloring part. This is because there is no need to repeat the patterning process, which is cost-effective and the manufacturing process is simplified.
• the difference between the thickness of the red colored portion, the combined thickness of the green colored portion and the green color converting portion, and the thickness of the blue colored portion may be 2. Ozm or less. I like it. This is because if the difference in thickness is too large, a step (concave / convex) due to the configuration of the colored layer and the color conversion layer becomes large, and it becomes difficult to flatten the surface.
• the thickness of the red colored portion, the combined thickness of the green colored portion and the green color converting portion, and the thickness of the blue colored portion are within the range of 1 / im to 3 / im. It is preferable that This is because it is difficult to form a red colored portion and a blue colored portion that are too thick, and it is also difficult to form a green color converting portion that is too thin. In particular, if the concentration of the green conversion phosphor in the green color conversion portion is too high in order to form a thin green color conversion portion, concentration quenching may occur.
• a green color conversion portion may be formed on the red coloring portion. Most of the green light emitted from the green color conversion part cannot pass through the red colored part, but the long wavelength side component of the green light is used as the short wavelength side component of the red light. Since it can be transmitted, it is possible to adjust the hue with such a configuration.
• a flat layer is formed on the color conversion layer. This is because the colored layer and the color conversion layer can be protected by forming the planarizing layer.
• the influence at the time of forming the transparent electrode layer is reduced, and the thickness at the time of forming the organic EL layer is reduced. This is because generation of unevenness can be prevented.
• a gas barrier layer is formed on the color conversion layer. Due to the formation of the gas barrier layer, when the color filter substrate for an organic EL device of the present invention is used in an organic EL display device, it is vulnerable to water vapor, oxygen, or desorbed gas from a colored layer or a color conversion layer. They can protect the organic EL layer, which is a member, from such gases.
• a light shielding part may be formed between the colored layers on the transparent substrate. This is because the formation of the light-shielding portion partitions the light emitting area for each pixel, prevents reflection of external light at the boundary between the light emitting areas, and increases the contrast.
• the present invention also provides the above-described color filter substrate for an organic EL element, a transparent electrode layer formed on the color conversion layer side surface of the color filter substrate for the organic EL element, and the transparent electrode layer.
• An organic EL display device comprising: an organic EL layer including at least a light emitting layer; and a counter electrode layer formed on the organic EL layer.
• the organic EL display device of the present invention uses the above-described color filter substrate for organic EL elements, light scattered and leaked in the color conversion layer can be efficiently extracted, and luminance can be improved. Is possible. Therefore, high brightness and high efficiency can be realized.
• the light emitting layer preferably emits white light with a two-wavelength light source.
• white light emitted from a light-emitting layer that emits white light includes red and blue light components and often does not include a green light component.
• the green color conversion portion is replaced with the green coloring portion.
• the brightness of green light can be improved.
• by making the area of the green color conversion unit larger than the areas of the red color conversion unit and the blue color conversion unit it is possible to increase the green light component. Therefore, an organic EL display device having an excellent balance of the color characteristics of the three primary colors can be obtained.
• the color conversion layer is partially formed on the colored layer, light scattered and leaked in the color conversion layer can be efficiently extracted, and luminance can be improved. so There is an effect that can. Therefore, in the organic EL display device using the color filter substrate for the organic EL element of the present invention, high luminance and high efficiency can be realized.
• the color filter substrate for an organic EL element of the present invention is used for an organic EL display device having a white light emitting layer that emits white light, for example, a green color conversion portion is partially formed on the green coloring portion, thereby forming a green color.
• the luminance of light can be improved, and the green light component can be increased by making the area of the green color conversion unit larger than the area of each of the red color conversion unit and the blue color conversion unit. Therefore, the organic EL display device using the color filter substrate for the organic EL element of the present invention has an effect that the balance of the color characteristics of the three primary colors is excellent.
• a schematic cross-sectional view showing an example of a color filter substrate for an organic EL device of the present invention 2] A schematic cross-sectional view showing another example of the color filter substrate for organic EL elements of the present invention. 3) A schematic cross-sectional view showing another example of the color filter substrate for organic EL elements of the present invention. ] Is a schematic sectional view showing another example of the color filter substrate for organic EL elements of the present invention. 5] This is a schematic sectional view showing another example of the color filter substrate for organic EL elements of the present invention. It is a schematic sectional drawing which shows an example of the organic electroluminescent display apparatus of invention.
• FIG. 7 A schematic cross-sectional view showing another example of the color filter substrate for an organic EL element of the present invention.
• 8] A schematic cross-sectional view showing another example of the color filter substrate for an organic EL element of the present invention.
• FIG. 10 is a schematic sectional view showing another example of the color filter substrate for an organic EL element of the present invention.
• FIG. 10 is a schematic sectional view showing another example of the organic EL display device of the present invention.
• 11 An explanatory diagram for explaining the green color conversion unit in the first embodiment.
• the color filter substrate for an organic EL element of the present invention comprises a transparent base material, a colored layer formed in a pattern on the transparent base material, and a color conversion layer partially formed on the colored layer. It has a special number.
• the color filter substrate for an organic EL device of the present invention can be divided into two embodiments. The In the following, each embodiment will be described separately.
• a transparent substrate In the first embodiment of the color filter substrate for an organic EL device of the present invention, a transparent substrate, a colored layer formed in a pattern on the transparent substrate, and a portion formed on the colored layer are formed. And a color conversion layer.
• FIG. 1 is a schematic cross-sectional view showing an example of a color filter substrate for an organic EL element of this embodiment.
• the coloring composed of the red coloring portion 2R, the green coloring portion 2G, and the blue coloring portion 2B on the transparent substrate 1.
• Layer 2 and a color conversion layer 3 composed of a red color conversion part 3R formed on the red coloring part 2R and a green color conversion part 3G formed on the green coloring part 2G are sequentially formed.
• a flat color layer 5 is formed so as to cover the coloring layer 2 and the color conversion layer 3.
• a black matrix 4 is formed between the colored portions 2R, 2G, and 2B of the coloring layer 2.
• the red color conversion unit 3R and the green color conversion unit 3G are partially formed on the red coloring unit 2R and the green coloring unit 2G, respectively.
• a transparent portion that transmits incident light is formed on the blue colored portion 2B.
• the thickness of the blue coloring part 2B is changed to the total thickness of the red coloring part 2R and the red color conversion part 3R or the green coloring part 2G and the green color conversion for the purpose of film thickness adjustment.
• the thickness may be about the same as the total thickness of part 3G.
• an organic EL display device When an organic EL display device is manufactured using the color filter substrate for an organic EL element shown in FIG. 1, a transparent electrode layer, a light emitting layer, and a counter electrode layer are sequentially laminated on the planarizing layer 5. It is. In such an organic EL display device, part of the light that also has a light emitting layer force passes through the color conversion layer 3 and further passes through the coloring layer 2, and the other part passes through the color conversion layer 3. Without passing through the colored layer 2.
• the color conversion layer 3 is the colored layer 2 in the present invention. Since it is partially formed on the top, the scattered light leaked can be emitted from a region on the colored layer 2 where the color conversion layer 3 is not formed. As a result, the light scattered and leaked in the color conversion layer can be extracted efficiently, and the luminance can be improved.
• the inorganic phosphor when used as the color conversion phosphor, the inorganic phosphor is generally opaque, and the fluorescence emitted from one inorganic phosphor in the color conversion layer is different from other inorganic phosphors. Since the phosphor cannot be transmitted, the luminance can be effectively improved by adopting the configuration of this embodiment.
• the color conversion layer used in this embodiment is partially formed on the colored layer.
• the formation position of the color conversion layer is not particularly limited as long as it is a part of the color layer.
• the color conversion layer 3 (3R, 3G, 3G) may be formed.
• the color conversion layer 3 (3R, 3G) may be formed on the colored layer 2 (2R, 2G).
• the color conversion layer 3 (3R, 3G) may be formed in one place on the colored layer 2 (2R, 2G).
• FIG. 3 (3R, 3G) may be formed in a pattern on the colored layer 2 (2R, 2G).
• the color conversion layer used in the present embodiment is one in which a color conversion phosphor that absorbs incident light and emits fluorescence of each color is dispersed or dissolved in a resin.
• a color conversion phosphor that absorbs incident light and emits fluorescence of each color is dispersed or dissolved in a resin.
• the color conversion phosphor either an inorganic phosphor or an organic phosphor can be used.
• the color conversion layer is preferably formed in a pattern on the colored layer. This is because the inorganic phosphor is generally opaque as described above, and the light emitted from one inorganic phosphor in the color conversion layer cannot be transmitted through the other inorganic phosphor and is scattered. This is because it is preferable to increase the surface area of the color conversion layer in order to efficiently extract the scattered and leaked light and improve the luminance. . Therefore, when an inorganic phosphor is used, the color conversion layer is preferably formed in a fine pattern on the colored layer. At this time, since it is difficult to form a pattern that is too fine, it is preferable to select the fineness of the color conversion layer pattern in consideration of the intended luminance and patterning characteristics.
• the preferred formation position of the color conversion layer is not particularly limited.
• the color conversion layer may be formed at one place on the colored layer.
• the pattern is formed on the colored layer.
• the occupied area ratio of the color conversion layer to the colored layer in the present embodiment is not particularly limited as long as the light extraction efficiency is improved and high luminance is obtained, but when an inorganic phosphor is used.
• the preferred range differs depending on whether an organic phosphor is used.
• the ratio of the area occupied by the color conversion layer to the colored layer is preferably about 20 to 90, where the area of the colored layer is 100, preferably S, more preferably 50 to 80, and even more preferably. Is in the range 70-80.
• the occupied area ratio of the color conversion layer to the colored layer is preferably about 70 to 100, more preferably 80 to 98, and more preferably 80 to 98, where the area of the colored layer is 100. Preferably it is in the range of 85-95. In any case, if the ratio of the area occupied by the color conversion layer to the colored layer is too small, the color conversion efficiency may be reduced. Conversely, if the ratio is too large, the color that can be scattered and leaked in the color conversion layer can be emitted. This is because the area on the layer becomes narrow, so that the light extraction efficiency is lowered, and there is a possibility that the brightness enhancement effect cannot be obtained.
• the "occupied area ratio of the color conversion layer to the colored layer" referred to here is, for example, a component of the color conversion layer 3 (color converter) as shown in Fig. 1 and a component of the 3R colored layer 2 (Colored portion)
• the ratio of the occupied area with respect to 2R is measured and does not mean the occupied area ratio of the entire color conversion layer to the entire colored layer.
• the thickness of the color conversion layer is not particularly limited as long as the light extraction efficiency is improved and high luminance can be obtained.
• the range is different.
• the thickness of the color conversion layer is preferably about 0 to about ⁇ zm, more preferably about 0.5 ⁇ m to 5 ⁇ m, and even more preferably about 1 ⁇ m. m to 3 ⁇ m It is within the range. This is because if the color conversion layer is too thick, the light emitted from one inorganic phosphor cannot pass through the other inorganic phosphor as described above, and there is a risk S that the luminance may decrease. Conversely, if the color conversion layer is too thin, the color conversion efficiency may be reduced.
• the inorganic phosphor in the color conversion layer If the content is too large, concentration quenching may occur. Therefore, when the content of the inorganic phosphor in the color conversion layer is increased to reduce the thickness of the color conversion layer, the thickness is appropriately selected in consideration of concentration quenching.
• the thickness of the color conversion layer is preferably about 0.5 ⁇ m to 30 ⁇ m, more preferably 1 ⁇ m to 10 ⁇ m, and even more preferably. Is in the range of 3 ⁇ m to 5 ⁇ m. This is because if the thickness of the color conversion layer is too thick, the level difference (unevenness) due to the configuration of the color conversion layer becomes large, and it becomes difficult to flatten the surface. On the contrary, if the color conversion layer is too thin, the color conversion efficiency may decrease. Similarly to the above, concentration quenching may occur when the content of the organic phosphor in the color conversion layer is increased in order to reduce the thickness of the color conversion layer.
• the color conversion layer used in the present embodiment is provided corresponding to the colored layer, and usually three types of color conversion units, a red color conversion unit, a green color conversion unit, and a blue color conversion unit. It has something.
• the color conversion layer is partially formed on the colored layer, but all three types of color conversion portions may be partially formed on the colored layer.
• One or two of the three types of color converters are partially formed on the colored layer.
• the configuration of the color conversion layer used in this embodiment differs depending on the configuration of the light emitting layer of the organic EL display device to which the organic EL element color filter substrate of this embodiment is applied.
• the color filter substrate for an organic EL element of the present embodiment is used in an organic EL display device having a blue light emitting layer that emits blue light
• the light incident on the color conversion layer generally includes a blue light component. Or it often contains blue and green light components.
• the color conversion layer includes a red color conversion unit that converts the incident light into red light and a green color conversion that converts the incident light into green light. And at least a part.
• the red color conversion portion may be partially formed on the red coloring portion.
• the green color conversion portion may be partially formed on the green coloring portion.
• the conversion part and the green color conversion part may be partially formed on each colored part.
• both the red color conversion portion and the green color conversion portion are partially formed on each colored portion.
• the red color conversion portion 3R and the green color conversion portion 3G are formed in a pattern as shown in FIG. 3, for example.
• the red color conversion unit and the green color conversion unit in a pattern and increasing the surface area, the light scattered and leaked in the red color conversion unit and the green color conversion unit can be more efficiently obtained. This is because it can be taken out and the luminance can be further improved.
• the incident light to the color conversion layer includes a blue light component
• the blue color conversion unit does not need to perform color conversion in principle, so the blue color conversion unit is not formed. You don't have to. Therefore, nothing needs to be formed on the blue colored portion, but in order to flatten the surface of the color filter substrate for the organic EL element, for example, as shown in FIGS.
• a transmission part 3B ′ having the same thickness as 3G may be formed.
• This transmissive part transmits incident light, and when formed on a blue colored part, it is not particularly limited as long as it transmits blue light. For example, it does not include a color conversion phosphor, It can consist of resin mentioned later. In this case, since the transmissive part does not contain the color conversion phosphor, the entire surface on the blue colored part is not necessary if the manufacturing process is considered to be partially formed on the blue colored part to improve luminance. It is common for this to be formed.
• the color conversion layer may have at least a red color conversion unit that converts the incident light into red light. Les.
• the red color conversion part is partially formed on the red coloring part.
• the red color conversion portion is formed in a pattern. As described above, by forming the red color conversion part in a pattern and increasing its surface area, the light scattered and leaked in the red color conversion part can be taken out more efficiently, and the luminance can be improved. This is because it can be further improved.
• the incident light to the color conversion layer includes components of blue light and green light
• the blue color conversion unit and the green color conversion unit do not need to perform color conversion in principle.
• the blue color conversion unit and the green color conversion unit may not be formed. Therefore, nothing may be formed on the blue coloring portion and the green coloring portion, but in order to flatten the surface of the color filter substrate for the organic EL element, the thickness is about the same as that of the red color conversion portion.
• a transmissive part may be formed.
• This transmissive portion transmits incident light. When formed on the blue colored portion, the transmissive portion transmits blue light. When formed on the green colored portion, the transmissive portion transmits green light. If it does, it will not be specifically limited, For example, a color conversion fluorescent substance is not included but it can consist of resin mentioned later. In this case, since the transmissive part does not contain the color conversion phosphor, it is not necessary to be partially formed on each colored part in order to improve the brightness. It is common that each is formed.
• the color filter substrate for an organic EL element of the present embodiment is used for an organic EL display device having a white light emitting layer that emits white light, for example, incident light to the color conversion layer is generally red light and blue light. Often contains ingredients. Therefore, the color conversion layer may have at least a green color conversion unit that converts incident light into green light. In this case, for example, as shown in FIG. 4, the green color conversion portion 3G is partially formed on the green coloring portion 2G. In particular, when an inorganic phosphor is used as the color conversion phosphor, the green color conversion portion 3G is preferably formed in a pattern as shown in FIG. 5, for example.
• the green color conversion part in a pattern and increasing its surface area, the light scattered and leaked in the green color conversion part can be extracted more efficiently, and the brightness is further improved. It is possible to make it happen.
• the incident light to the color conversion layer includes components of red light and blue light
• the red color conversion unit and the blue color conversion unit do not need to perform color conversion in principle.
• the red color conversion unit and the blue color conversion unit may not be formed. In this case, nothing may be formed on the red colored portion and the blue colored portion, but in order to flatten the surface of the color filter substrate for the organic EL element, for example, as shown in FIGS. Transmission parts 3R 'and 3B' having the same thickness as the conversion part 3G are formed, respectively.
• the configuration of the color conversion layer according to the type of light emitting light source of the light emitting layer in the organic EL display device to which the color filter substrate for the organic EL element of the present embodiment is applied has been described.
• the configuration of the color conversion layer used in the embodiment is not particularly limited depending on the type of light emitting light source of the light emitting layer, as long as the color conversion layer can perform a desired color complementation.
• the green color conversion unit used in this embodiment is formed by dispersing or dissolving a green conversion phosphor that absorbs incident light and emits green fluorescence.
• the green conversion phosphor it is possible to use either an inorganic phosphor or an organic phosphor as described above.
• the inorganic phosphor used as the green conversion phosphor include rare earth complex phosphors disclosed in JP-A-2004-14335.
• rare earth complex-based phosphors include those having rare earth metals such as Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb.
• the ligand may be either aromatic or non-aromatic, and is preferably a compound represented by the following general formula (1).
• Lx, Ly, and Lz each independently represent an atom having two or more bonds
• n represents 0 or 1
• Xa represents an atom that can be coordinated to the adjacent position of Lx
• Y a represents a substituent having an atom that can be coordinated to the adjacent position of Lz.
• Any part of Xa and Lx may be condensed with each other to form a ring
• any part of Ya and Lz may be condensed with each other to form a ring.
• a ring may be condensed to form an aromatic hydrocarbon ring or aromatic heterocycle in the molecule.
• Xa- (Lx) (Ly) n- (Lz) — Ya is a ⁇ -diketone derivative, ⁇ -ketoester derivative, ⁇ -ketoamide derivative, or the oxygen atom of the ketone is replaced with a sulfur atom or N (R201) —, or crown Ether, azacrown ether, thiacrown ether, or an aromatic hydrocarbon ring or aromatic group when it represents a crown ether in which the oxygen atom of the crown ether is replaced with any number of sulfur atoms or —N (R201) There may be no heterocycle.
• R201 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group.
• the coordinable atoms represented by Xa and Ya are specifically an oxygen atom, a nitrogen atom, a sulfur atom, a selenium atom, and a tellurium atom.
• the atom having two or more bonds represented by Lx, Ly, and Lz is not particularly limited, and examples thereof include a carbon atom, an oxygen atom, a nitrogen atom, a silicon atom, and a titanium atom.
• rare earth complex phosphors include rare earths containing Ba and Si such as Ba Eu SiO.
• Examples thereof include phosphors.
• inorganic phosphors used as green conversion phosphors include alkaline earth metal thiogallate phosphors disclosed in JP-T-2004-505167, ZnS: Tb, etc. ZnS-based phosphors and yellow-green pigments (for example, FA005 (trade name) manufactured by Shinhiro Corporation) are also included.
• ZnS phosphors such as ZnS: Mn, ZnS: Mn / ZnMgS, (Y, Gd) 3A1 O: Ce
• a yellow phosphor such as 5 12 or an orange pigment (for example, FA001 (trade name) manufactured by Shinhiroine Earth) can also be used.
• These phosphors are not green phosphors, but each contain a green phosphor component, so that color complementarity is possible and can be used.
• organic phosphor used as the green conversion phosphor examples include 2, 3, 5, 6 — 1H, 4H tetrahydro-8 trifluoromethylquinolidino (9, 9a, 1—gh).
• organic phosphor used as the green conversion phosphor examples include 2, 3, 5, 6 — 1H, 4H tetrahydro-8 trifluoromethylquinolidino (9, 9a, 1—gh).
• organic phosphor examples include the above pigments and dyes such as polymethacrylic acid ester, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer resin, alkyd resin, aromatic sulfonamide resin, urea resin, melamine resin, A fluorescent pigment kneaded in advance in a benzoguanamine resin or a mixture of these resins may also be used.
• dyes such as polymethacrylic acid ester, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer resin, alkyd resin, aromatic sulfonamide resin, urea resin, melamine resin, A fluorescent pigment kneaded in advance in a benzoguanamine resin or a mixture of these resins may also be used.
• inorganic phosphor and organic phosphor may be used alone or in combination of two or more in order to adjust the hue of fluorescence.
• the inorganic phosphor used as the red conversion phosphor include rare earth complex phosphors.
• this rare earth complex phosphor include K Eu (WO
• rare earth complex phosphors containing K and W include rare earth complex phosphors containing K and W.
• rare earth complex phosphors containing K and W include rare earth complex phosphors containing K and W.
• inorganic phosphors used as red conversion phosphors include ZnS phosphors such as ZnS: Mn, ZnS: Mn / ZnMgS, or orange pigments (for example, FA001 (trade name) manufactured by Shinhiro Corporation). It is done.
• organic phosphors used as red-converting phosphors include cyanine dyes such as 4-disanomethylene-1,2-methyl 6- (p dimethylaminostyryl) 4H-pyran; 1 ethyl-2 -[4— (p-dimethylaminophenyl) 1,3-butabutenyl] —Pyridine dyes such as pyridinium perpark mouthrate; rhodamine B, rhodamine 6G, rhodamine 3B, rhodamine 101, rhodamine 110, sulforhodamine, basic violet 11, rhodamine dyes such as Basic Red 2; oxazine dyes; and the like.
• cyanine dyes such as 4-disanomethylene-1,2-methyl 6- (p dimethylaminostyryl) 4H-pyran
• organic phosphor examples include the above-described dyes such as polymethacrylic acid ester, polysulphated butyl, butyl chloride monoacetate butyl copolymer resin, alkyd resin, aromatic sulfonamide resin, urea resin, melamine resin, A fluorescent pigment kneaded in advance in a benzoguanamine resin or a mixture of these resins may also be used.
• dyes such as polymethacrylic acid ester, polysulphated butyl, butyl chloride monoacetate butyl copolymer resin, alkyd resin, aromatic sulfonamide resin, urea resin, melamine resin, A fluorescent pigment kneaded in advance in a benzoguanamine resin or a mixture of these resins may also be used.
• the inorganic phosphor and the organic phosphor described above may be used alone or in combination of two or more in order to adjust the hue of fluorescence. In general, the conversion efficiency from blue light to red light is low. it can.
• each color conversion section includes polymethyl methacrylate resin, polyacrylate resin, polycarbonate resin, polybutyl alcohol resin, polybutylpyrrolidone resin, hydroxyethyl cellulose resin, carboxymethyl cellulose.
• transparent resins such as resins, polyvinyl chloride resins, melamine resins, phenol resins, alkyd resins, epoxy resins, polyurethane resins, polyester resins, maleic resins, or polyamide resins.
• Specific examples of the resin include an ionizing radiation curable resin having a reactive bur group such as an acrylate, metatalylate, polycinnamate bure, or cyclized rubber (in practice, an electron beam). Curable resin or ultraviolet curable resin, often the latter).
• the ratio of the resin in each color conversion section to each color conversion phosphor is preferably about 100: 0.3 to about 100: 5 (mass standard). This is because if the ratio of the color conversion phosphor is too small, sufficient color conversion efficiency may not be obtained, and if the ratio is too large, concentration quenching may occur.
• color conversion layer for example, a photolithography method, or the above-described color conversion phosphor and resin are mixed with a solvent, a diluent, or an appropriate additive as necessary to form a color conversion layer.
• a photolithography method or the above-described color conversion phosphor and resin are mixed with a solvent, a diluent, or an appropriate additive as necessary to form a color conversion layer.
• the printing method which prepares a coating liquid and prints can be mentioned.
• the colored layer used in the present embodiment is formed in a pattern on a transparent substrate, and usually has a red colored portion, a green colored portion, and a blue colored portion. Each colored portion is regularly arranged corresponding to each pixel, and when a light shielding portion is formed, it is provided corresponding to the opening of the light shielding portion.
• Each colored portion used in this embodiment is obtained by dispersing or dissolving a colorant such as a pigment or a dye of each color in a binder resin.
• Examples of the colorant used in the red coloring portion include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. These pigments may be used alone or in combination of two or more.
• Examples of the colorant used in the green coloring portion include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, isoindoline pigments, and isoindolinones. And pigments. These pigments or dyes may be used alone or in combination of two or more.
• Examples of the colorant used in the blue colored portion include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, and dioxazine pigments. These pigments may be used alone or in combination of two or more.
• a transparent resin is used as the binder resin used for each colored portion.
• examples of the binder resin include a polymethyl methacrylate resin, a poly acrylate resin, a polycarbonate resin, a polybutyl alcohol resin, a polyvinyl pyrrolidone resin, and a hydroxyethyl cellulose resin.
• the binder resin is usually a reaction such as an acrylate, metatallate, polyvinyl cinnamate, or cyclized rubber.
• An ionizing radiation curable resin having a functional vinyl group is used.
• an electron beam curable resin or an ultraviolet curable resin is used.
• a photopolymerization initiator is used alone or in combination with a binder resin.
• a sensitizer when using an ultraviolet curable photosensitive resin, a sensitizer, a coatability improver, a development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. may be used as necessary. Good.
• the content of the colorant is preferably in the range of 5 to 50% by weight in each colored portion.
• the binder resin content is preferably in the range of 30 to 100 parts by weight with respect to 100 parts by weight of the colorant.
• the thickness of such a colored layer is usually about 1 ⁇ m to 3 ⁇ m.
• the arrangement of the colored portions is not particularly limited as long as the colored portions are arranged on an average when viewed macroscopically. For example, a stripe arrangement 1J, a mosaic arrangement IJ, a delta arrangement, etc. Are listed. Moreover, each coloring part may be formed for every opening part of the light-shielding part.
• a coloring agent is prepared by mixing, dispersing or solubilizing a coloring agent in a binder resin to prepare a colored layer forming coating solution, and using this colored layer forming coating solution, A patterning method using a phi method or a patterning method using a printing method using the colored layer forming coating solution is used.
• the transparent substrate used in this embodiment is a support that supports the color filter substrate for an organic EL element.
• the organic EL display device is configured using the color filter substrate for the organic EL element of the present embodiment, it is disposed on the viewer side and is also a support that supports the entire organic EL display device. .
• the transparent substrate for example, an inorganic plate-like transparent substrate such as glass or quartz glass, an organic (for example, synthetic resin) plate-like transparent substrate such as acrylic resin, or a synthetic resin
• an inorganic plate-like transparent substrate such as glass or quartz glass
• an organic (for example, synthetic resin) plate-like transparent substrate such as acrylic resin
• a synthetic resin A transparent film substrate
• Very thin glass can also be used as a transparent film substrate.
• the surface on the side on which the colored layer, the color conversion layer and the like are formed has high smoothness. Specifically, it is preferable to use one having an average surface roughness (Ra) force of 0.5 nm to 3. Onm (5 ⁇ mO region).
• the synthetic resin constituting the transparent substrate include polycarbonate resin, polyarylate resin, polyethersulfone resin, acrylic resin such as methyl methacrylate resin, cellulose resin such as triacetyl cellulose resin, and epoxy resin. Or a cyclic olefin resin or a cyclic olefin copolymer resin.
• a light shielding part (also referred to as a black matrix) may be formed between the colored layers on the transparent substrate.
• the light shielding portion is provided to partition the light emitting area for each pixel, prevent reflection of external light at the boundary between the light emitting areas, and enhance the contrast of images and videos. Therefore, the shading part is not necessarily provided.
• the light shielding portion is formed when the colored layer or the like is formed corresponding to the opening of the light shielding portion.
• the light-shielding portion is formed because the light-emitting layer is formed corresponding to the opening of the light-shielding portion. I prefer to be there.
• the light shielding portion is usually formed in a black line shape, and is formed in a pattern shape having an opening portion such as a matrix shape or a stripe shape.
• the light shielding portion used in the present embodiment may be insulating or non-insulating, but it is preferable that it has insulating properties. If the light-shielding part has insulating properties, even when the organic EL display device using the organic EL element color filter substrate of this embodiment is used as an organic EL display device, the light-shielding part and the transparent electrode layer are in contact with each other. This is because it is possible to avoid conduction between the light shielding portion and the transparent electrode layer.
• Examples of the material for forming an insulating light shielding part include a resin composition containing a black colorant such as carbon black.
• Examples of the resin used in this resin composition include ionizing radiation curable resins having a reactive bur group such as attalylate, metatalylate, polyvinyl cinnamate, or cyclized rubber, particularly electron beam curable. Resin or UV curable resin can be used.
• polymethyl methacrylate resin polyacrylate resin
• polycarbonate resin polyvinyl alcohol resin
• polybutylpyrrolidone resin hydroxyethyl cellulose resin
• carboxymethyl cellulose resin polychlorinated bur resin
• melamine resin phenol resin, alkyd resin
• Epoxy resin polyurethane resin
• polyester resin maleic acid resin
• polyamide resin etc.
• examples of the material for forming the light-shielding portion having no insulating property include metals such as chromium and metal oxides such as chromium oxide.
• the non-insulating light-shielding portion may be a CrO film (X is an arbitrary number) and two layers of Cr film laminated, or a CrO film with a further reduced reflectance. (X is an arbitrary number), CrN film (y is an arbitrary number) and Cr film force 3 ⁇ 4 layer It may be laminated.
• a method for forming a light-shielding part having insulating properties a method of applying the above resin composition on a substrate and patterning it by a photolithography method can be used. Also, a printing method or the like can be used.
• a method for forming a non-insulating and light-shielding portion a method of forming a thin film by an evaporation method, an ion plating method, a sputtering method, or the like, and patterning using a photolithography method is used. Can be used. Further, an electroless plating method or the like can also be used.
• the film thickness of the light-shielding portion is about 0.2 xm to 0.4 xm when formed by vapor deposition, ion plating, sputtering, or the like. when due to is a 5 ⁇ m ⁇ 2 ⁇ about m 0..
• a flat layer may be formed on the color conversion layer.
• This flat layer has a role of protecting the colored layer and the color conversion layer, and when the thickness of the colored layer and the color conversion layer is not constant, the surface of the layer is leveled to be a flat surface.
• the flattening layer eliminates this step and flattens it, and forms the organic EL layer when manufacturing the organic EL display device. It has a flattening action to prevent occurrence of uneven thickness.
• a transparent resin can be used as a material for forming the flat layer used in the present embodiment.
• photocurable resins and thermosetting resins having an acrylate or metatalylate reactive beer group can be used.
• polymethylol methacrylate, polyacrylate, polycarbonate, polybutyl alcohol, polyvinyl pyrrolidone, hydroxyethyl cellulose, carboxymethyl cellulose, polyvinyl chloride resin, melamine resin, phenol resin, alkyd resin Epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin, etc. can be used
• the flat layer in this embodiment may have light scattering properties. Since the flattening layer has light scattering properties, the light converted by the color conversion layer is horizontal to the transparent substrate. This is because leakage in the direction is suppressed, and light can be efficiently extracted in a direction perpendicular to the transparent substrate (observer side).
• the planarizing layer may contain light scattering fine particles.
• the light-scattering fine particles used in this embodiment are fine particles having a light scattering action.
• Preferred examples of the light-scattering fine particles include inorganic substances such as silicon oxide, aluminum oxide, and barium sulfate, acrylic resins, dibulebenzene resins, benzoguanamine resins, styrene resins, melamine resins, and acrylic-styrene resins.
• the organic fine particles such as polycarbonate resin, polyethylene resin, and polyvinyl chloride resin, and the like include a mixture of two or more of them.
• melamine resin, benzoguanamine resin, and mixed resin and copolymer fine particles are preferable in terms of transparency and durability.
• the average particle diameter of the light-scattering fine particles is preferably about 0.1 to 5 ⁇ m, more preferably 0 ⁇ 1 to 4.0 / im, and still more preferably 0. ⁇ :! to 2 ⁇ ⁇ ⁇ ⁇ . This is because a sufficient light scattering effect can be obtained when the average particle diameter is in the above range.
• the light-scattering fine particles are preferably spherical in order to increase the light scattering effect.
• the film is applied by spin coating, roll coating, cast coating, or the like.
• a method of thermosetting as necessary after irradiation with ultraviolet rays can be used.
• a flat layer can be formed directly or by sticking via an adhesive.
• the thickness of such a flat layer can be, for example, about:! To 7 am.
• a gas barrier layer may be formed on the color conversion layer.
• the gas barrier layer 6 is formed on the flat layer 5.
• this gas barrier layer is used in an organic EL display device, water vapor, oxygen, or adsorption from the color filter substrate for the organic EL element is applied to the organic EL layer. It is provided to block the passage of desorbed gas from the color layer, color conversion layer, and the like.
• the gas barrier layer used in the present embodiment is not particularly limited as long as it can exhibit gas barrier properties against gas such as water vapor, oxygen, desorption gas, etc.
• gas barrier properties against gas such as water vapor, oxygen, desorption gas, etc.
• transparent inorganic A film, a transparent resin film, an organic-inorganic hybrid film, or the like is used.
• a transparent inorganic film is preferable because of its high gas barrier property.
• the material used for the transparent inorganic film is not particularly limited as long as it can exhibit gas barrier properties.
• oxides such as aluminum oxide, silicon oxide, and magnesium oxide; Nitride such as nitride; nitrided oxide such as nitrided nitride oxide; Among these, nitrided silicon oxide is preferred because of its high gas noriality due to pinholes and protrusions.
• the gas barrier layer may be a single layer or multiple layers.
• the gas barrier layer is a multilayer in which a plurality of nitrided silicon oxide films are stacked, the gas barrier property can be further improved.
• the gas barrier layer is a multilayer, different materials may be used for each layer.
• the thickness of the gas barrier layer is not particularly limited, and may vary depending on the type of material used for the gas barrier layer and whether the gas barrier layer is a single layer or a multilayer. Although it cannot be generally specified, it is generally about 20 nm to 2 ⁇ m for the entire gas barrier layer. This is because if the thickness of the gas barrier layer is too thin, the gas barrier properties may be insufficient, and if the thickness of the gas barrier layer is too thick, a phenomenon such as cracking due to the film stress of the thin film tends to occur.
• the method for forming the transparent inorganic film is not particularly limited as long as it is a film forming method that can be formed in a vacuum state.
• examples include a growth (CVD) method, an ion plating method, an electron beam (EB) evaporation method, a vacuum evaporation method such as a resistance heating method, and a laser ablation method.
• CVD growth
• EB electron beam
• a vacuum evaporation method such as a resistance heating method
• a laser ablation method a laser ablation method.
• the sputtering method, the ion plating method, and the CVD method are preferable, and the use of the sputtering method is more preferable than the force S. High productivity and quality stability by using sputtering method This is because an excellent gas barrier layer can be formed.
• a black matrix is formed by depositing a metal such as chromium or a metal oxide such as chromium oxide on the entire surface of the transparent substrate and patterning it using a photolithography method.
• a coating solution for forming a red colored portion in which a red colorant is dispersed or dissolved in a binder resin is applied and patterned using a photolithography method.
• a green colored portion and a blue colored portion are formed by the same procedure.
• a green color conversion part is formed by applying a coating liquid for forming a green color conversion part in which a green conversion phosphor is dispersed or dissolved in a resin and patterning using a photolithography method. To do. At this time, the green color conversion part is formed in a pattern on the green coloring part.
• a second embodiment of the color filter substrate for an organic EL element of the present invention includes a transparent base material, a colored layer formed on the transparent base material in a pattern, and having a red colored portion, a green colored portion, and a blue colored portion.
• a color filter substrate for an organic EL element having a color conversion layer having at least a green color conversion part formed on the green color part, wherein the area of the green color conversion part is above the red color part.
• the red color conversion portion formed on the blue color conversion portion and the blue color conversion portion formed on the blue coloring portion are larger in area than each other.
• FIG. 7 is a schematic cross-sectional view showing an example of a color filter substrate for an organic EL element of the present embodiment.
• FIG. 7 in the color filter substrate 10 for the organic EL element of the present embodiment, the coloring composed of the red coloring portion 2R, the green coloring portion 2G, and the blue coloring portion 2B on the transparent substrate 1.
• the color conversion layer 3 to be configured is sequentially formed, and a flat color layer 5 is formed so as to cover the color layer 2 and the color conversion layer 3.
• a black matrix 4 is formed between the colored portions 2R, 2G, and 2B of the colored layer 2.
• the area of the green color conversion unit 3G is larger than the area of the blue color conversion unit 3B which is larger than the area of the red color conversion unit 3R.
• a color filter substrate for an organic EL element When such a color filter substrate for an organic EL element is used in, for example, an organic EL display device having a white light emitting layer, a transparent electrode layer, a white light emitting layer, and a counter electrode layer are provided on the planarizing layer 5. Laminated sequentially.
• white light emitted from a white light emitting layer is composed of red light and blue light, and the green light component is often small. When this white light passes through the colored layer, almost no green light is observed.
• the area of the green color conversion unit 3G that converts incident light into green light is made larger than the area of each of the red color conversion unit 3R and the blue color conversion unit 3B. Ingredients can be increased. Therefore, by using the organic EL element color filter substrate of the present embodiment, it is possible to provide an organic EL display device that is excellent in the balance of the color characteristics of the three primary colors.
• the areas of the red color conversion unit and the blue color conversion unit are It is not particularly limited. Further, as described above, since the white light emitted from the white light emitting layer includes components of red light and blue light, in principle, the red color conversion unit and the blue color conversion unit do not need to perform color conversion. Therefore, the red color conversion part and the blue color conversion part may or may not be formed. For example, as shown in FIG. 7, when the red color conversion unit 3R and the blue color conversion unit 3B are formed, there is an advantage that the hues of red and blue can be adjusted. On the other hand, for example, as shown in FIG.
• the thickness dl of the red coloring portion 2R, and the combined thickness of the green coloring portion 2G and the green color conversion portion 3G Difference between d2 and thickness d3 of blue colored portion 2B h force 2.
• Oxm or less is preferable, more preferably 0.5 xm or less, and most preferably 0.2 zm or less. This is because if the difference in thickness is too large, a step (unevenness) due to the configuration of the colored layer and the color conversion layer becomes large, and it becomes difficult to flatten the surface.
• a transparent electrode layer and an organic EL layer are formed on the surface of the color conversion layer. If the surface unevenness due to the composition of the color conversion layer is large, it may cause dark areas.
• the thickness of the color conversion layer is larger than the thickness of the colored layer.
• the thickness of the red colored portion and the blue colored portion may be increased, or the thickness of the green color converting portion may be decreased.
• concentration of the colorant in each colored portion the thickness of the red colored portion and the blue colored portion can be increased, and the concentration of the green conversion phosphor in the green color converting portion can be increased.
• the thickness of the green color conversion portion can be reduced.
• concentration quenching may occur.
• the thickness dl of the red coloring portion 2R, the thickness d2 of the green coloring portion 2G and the green color conversion portion 3G, and the thickness d3 of the blue coloring portion 2B are also 1 111 to 3 111. It is preferably within the range of 1 111 to 2 111 and most preferably within the range of 1.2 ⁇ to 1.
• the color conversion layer used in the present embodiment has at least a green color conversion part formed on the green coloring part.
• the area of the green color conversion portion is larger than the area of each of the red color conversion portion formed on the red coloring portion and the blue color conversion portion formed on the blue coloring portion.
• the area ratio of each color conversion unit is not particularly limited as long as the area of the green color conversion unit is larger than the areas of the red color conversion unit and the blue color conversion unit.
• area refers to an area in a plane horizontal to the surface of the transparent substrate.
• the area of the green color conversion unit is larger than the areas of the red color conversion unit and the blue color conversion unit.
• the red color conversion portion and the blue color conversion portion may be formed or may be formed or not.
• the red color conversion portion and the blue color conversion portion are formed, for example, as shown in FIG. 7, the red color conversion portion 3R and the blue color conversion portion 3B are on the red color portion 2R and the blue color portion 2B.
• the area of the green color conversion unit can be made larger than the areas of the red color conversion unit and the blue color conversion unit.
• the formation position of the red color conversion part and the blue color conversion part is not particularly limited as long as it is a part on each coloring part.
• the red color conversion part or the blue color conversion is provided at the center of each coloring part.
• a red color conversion portion or a blue color conversion portion may be formed on each colored portion, which may be formed with a portion.
• a transmission portion that transmits incident light may be formed on each colored portion.
• This transmissive part transmits red light when formed on the red colored part, and transmits blue light when formed on the blue colored part.
• a green color conversion unit 3G may be formed on the red coloring unit 2R.
• Most of the green light emitted from the green color conversion part 3G cannot pass through the red coloring part 2R, but the long wavelength component of the green light is red. This is because the red colored portion 2R can be transmitted as a component on the short wavelength side of light, and the hue can be adjusted.
• both the red color conversion portion and the green color conversion portion may be formed, regardless of whether the red color conversion portion is formed or the green color conversion portion is formed. It is also possible that the red color conversion unit and the green color conversion unit have a misalignment or misalignment.
• the green color conversion section used in this embodiment is obtained by dispersing or dissolving a green conversion phosphor that absorbs incident light and emits green fluorescence.
• green-converting phosphors include 2, 3, 5, 6-1H, 4H-tetrahydro-8_trifluoromethylquinolizino (9, 9a, l_gh) coumarin, 3_ (2 ' _Benzothiazolyl) _ 7_ Jetylaminocoumarin, or 3_ (2 'Benzimidazolyl)-7-N, N-Jetyl Coumarin dyes such as aminocoumarin; Coumarin dyes such as Basic Yellow 51; Solvent Yellow 11, Or a naphthalimide dye such as Solvent Yellow 116; a fluorescent dye such as a ZnS phosphor such as ZnS: Tb; or a fluorescent pigment such as a yellow-green pigment (for example, F A005 (trade name) manufactured by Sinheroine Earth) Can do.
• F A005 trade name
• the green color conversion phosphor is obtained by combining the above-mentioned fluorescent dye with, for example, polymethacrylic acid ester, polychlorinated butyl, chlorinated chloracetic acid butyl copolymer resin, alkyd resin, aromatic sulfonamide rosin, urea resin, melamine resin, A fluorescent pigment kneaded in advance in a benzoguanamine resin or a mixture of these resins may also be used.
• the above fluorescent dyes and fluorescent pigments may be used alone or in combination of two or more in order to adjust the hue of fluorescence.
• the thickness of the green color conversion section can be set to about 1 ⁇ m to 10 xm. Among them, as described above, the thickness of the red colored portion, the thickness of the combined green colored portion and the green color converting portion, and the thickness of the blue colored portion are within a predetermined range. The thickness is such that the combined thickness of the green colored portion and the green color converting portion is within a predetermined range. It is preferable. Specifically, the force S, which varies depending on the thickness of the green coloring portion, and the thickness of the green color conversion portion is preferably in the range of 1.5 / im to 5 / im, more preferably 1.8 / It is in the range of im ⁇ 2.5 / im.
• the thickness of the green color conversion portion is set to be relatively thin in order to make the above-described thickness difference or the total thickness of the green color portion and the green color conversion portion within a predetermined range, for example, the green color
• the thickness of the green color conversion part can be reduced without reducing the color conversion efficiency.
• concentration quenching may occur. Therefore, when the content of the green color conversion phosphor in the green color conversion part is increased to reduce the thickness of the green color conversion part, the thickness is appropriately selected in consideration of concentration quenching.
• the red color conversion portion when the red color conversion portion is formed, the red color conversion portion absorbs incident light and emits red fluorescence in the resin. Dispersed or dissolved.
• red-converting phosphors include 4-dicyanomethylene 2-methyl-6 (p-dimethylaminostyryl) 4H pyran and other cyanine dyes such as 1-ethyl-2- [4— (p— Dimethylaminophenyl) 1,3-Butagenyl] Pyridine dyes such as pyridinium park mouthrate; Rhodamine dyes such as rhodamine B or rhodamine 6G; Oxazine dyes; ZnS: Mn, ZnS: ZnS: Mn / ZnMgS, etc.
• Illustrative examples include fluorescent pigments such as phosphors, or fluorescent pigments such as orange pigments (for example, FA001 (trade name) manufactured by Sinhiroine Earth).
• the red-converted phosphor is obtained by combining the fluorescent dye with, for example, polymethacrylic acid ester, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer resin, alkyd resin, aromatic sulfonamide resin, urea resin, melamine resin, benzoguanamine.
• a fluorescent pigment kneaded in advance in a resin or a mixture of these resins may also be used.
• the fluorescent dyes and fluorescent pigments may be used alone or in combination of two or more in order to adjust the hue of fluorescence.
• the resin used in the red color conversion unit is the same as the resin used in the green color conversion unit described above. Also, the ratio of the resin in the red color conversion part and the red conversion phosphor Is the same as in the case of the green color conversion unit.
• the red color conversion part and the blue color conversion part preferably have the same thickness as the green color conversion part.
• this transmissive part is formed on the red colored part, and in this case, it transmits red light, and is formed on the blue colored part.
• the case is not particularly limited as long as it transmits blue light.
• it does not include a color conversion phosphor and can be made of the above-described resin.
• each color conversion phosphor and resin are mixed with a solvent, a diluent or an appropriate additive as necessary to prepare each color conversion part forming coating solution.
• a method of patterning by a photolithography method using the coating solution for forming each color conversion portion, or a method for patterning by a printing method using the coating solution for forming each color conversion portion is used. .
• the colored layer used in this embodiment is formed in a pattern on a transparent substrate, and has a red colored portion, a green colored portion, and a blue colored portion.
• the thickness of the red colored portion, the thickness of the combined green colored portion and the green color converting portion, and the thickness of the blue colored portion are within a predetermined range as described above. It is preferable that the thickness is such that the combined thickness of the green coloring portion and the green color conversion portion falls within a predetermined range. Specifically, although it varies depending on the thickness of the green color conversion portion, the thickness of the green coloring portion is preferably about 1 ⁇ m to 3 ⁇ m, more preferably 1 ⁇ 2 111 to 2/1 111 It is within the range, and most preferably within the range of 1.5 ⁇ to 1.8 ⁇ m.
• the thicknesses of the red colored portion and the blue colored portion are as described above.
• Planarization layer In this embodiment, a flattening layer is formed on the color conversion layer.
• planarizing layer Note that the material and method for forming the planarizing layer are the same as those described in the first embodiment, and a description thereof will be omitted here.
• the thickness of the flat layer can be, for example, about:! To 5 ⁇ m.
• a gas barrier layer is formed on the color conversion layer.
• the thickness of the gas barrier layer is not particularly limited, and differs depending on the type of material used for the gas barrier layer and whether the gas barrier layer is a single layer or a multilayer. However, it is usually about 50 nm to 2 ⁇ m for the entire gas barrier layer. This is because if the thickness of the gas barrier layer is too thin, the gas barrier property may be insufficient, and if the thickness of the gas barrier layer is too thick, a phenomenon such as a crack due to the film stress of the thin film is likely to occur.
• a black matrix is formed by depositing a metal such as chromium or a metal oxide such as chromium oxide on the entire surface of a transparent substrate and patterning it using a photolithography method.
• a coating solution for forming a red colored portion in which a red colorant is dispersed or dissolved in a binder resin is applied and patterned using a photolithography method.
• a green colored portion and a blue colored portion are formed by the same procedure. At this time, each colored portion is formed so that its thickness falls within a predetermined range.
• a green color conversion part is formed by applying a coating liquid for forming a green color conversion part in which a green conversion phosphor is dispersed or dissolved in a resin and patterning using a photolithography method. To do.
• the green color conversion portion has a predetermined thickness of the red color portion, a thickness of the green color portion and the green color conversion portion, and a thickness of the blue color portion. It forms so that it may become a range.
• the organic EL display device of the present invention includes the above-described organic EL element color filter substrate, the transparent electrode layer formed on the color conversion layer side surface of the organic EL element color filter substrate, and the transparent electrode layer. And an organic EL layer including at least a light emitting layer and a counter electrode layer formed on the organic EL layer.
• the organic EL display device of the present invention uses the above-described color filter substrate for organic EL elements, light scattered and leaked in the color conversion layer can be efficiently extracted, and luminance can be improved. Is possible.
• FIG. 6 is a schematic cross-sectional view showing an example of the organic EL display device of the present invention.
• the color filter substrate 10 for an organic EL element is formed on a transparent substrate 1, a colored layer composed of colored portions 2R, 2G, and 2B of the three primary colors and a green color formed on the green colored portion 2G.
• a color conversion layer having a conversion portion 3G is formed, a light shielding portion 4 is formed between the coloring portions 2R, 2G, and 2B, and a flat layer 5 is formed so as to cover the coloring layer and the color conversion layer.
• the gas barrier layer 6 is formed thereon. Further, on the red colored portion 2R and the blue colored portion 2B, there are formed transmitting portions 3 and for transmitting incident light, respectively.
• the transparent electrode layer 11, the organic EL layer 12 including the light emitting layer, and the counter electrode layer 13 are formed on the gas barrier layer 6 of the color filter substrate 10 for the organic EL element.
• An insulating layer 14 is formed between the transparent electrode layers 11 on the gas barrier layer 6, and a partition wall portion (forced sword separator) 15 is formed thereon.
• FIG. 10 is a schematic sectional view showing another example of the organic EL display device of the present invention.
• the color filter substrate 10 for the organic EL element includes a colored layer having three primary colored portions 2R, 2G, and 2B on a transparent substrate 1, and a green color converting portion 3G corresponding to the green colored portion 2G.
• a color conversion layer having a light shielding portion 4 is formed between the colored portions 2R, 2G, and 2B.
• a flat layer 5 is formed so as to cover the coloring layer and the color conversion layer, and a gas barrier layer 6 is formed thereon.
• the transparent electrode layer 11, the organic EL layer 12 including the white light emitting layer, and the counter electrode layer 13 are provided on the gas barrier layer 6 of the color filter substrate 10 for the organic EL element.
• the insulating layer 14 is formed between the transparent electrode layers 11 on the gas barrier layer 6, and the partition wall portion (forced sword separator) 15 is formed thereon.
• the organic EL display device of the present invention has a white light emitting layer that emits white light, for example, as shown in FIG. A green display can be obtained and the luminance of green light can be improved.
• the green light component can be increased by making the area of the green color conversion unit larger than the areas of the red color conversion unit and the blue color conversion unit. Therefore, the organic EL display device of the present invention uses the above-described color filter substrate for the organic EL element even when it has a white light emitting layer that emits white light, and therefore has an excellent balance of the color characteristics of the three primary colors.
• the organic EL layer used in the present invention is composed of one or more organic layers including at least a light emitting layer. That is, the organic EL layer is a layer including at least a light-emitting layer, and the layer structure is a layer having one or more organic layers.
• the organic EL layer is formed by a wet method by coating, it is often difficult to stack a large number of layers in relation to the solvent, so it is often formed with one or two organic layers.
• it is possible to further increase the number of layers by devising organic materials so that their solubility in solvents is different or by combining vacuum deposition methods.
• Examples of the organic layer formed in the organic EL layer other than the light emitting layer include a charge injection layer such as a hole injection layer and an electron injection layer.
• examples of other organic layers include a charge transport layer such as a hole transport layer that transports holes to the light-emitting layer and an electron transport layer that transports electrons to the light-emitting layer.
• the layer is formed integrally with the charge injection layer by imparting a charge transport function to the layer.
• As an organic layer formed in the organic EL layer it prevents holes or electrons from penetrating like the carrier block layer, and further prevents diffusion of excitons and confines excitons in the light emitting layer. Examples include a layer for increasing the recombination efficiency.
• the light emitting layer used in the present invention has a function of emitting light by providing a recombination field between electrons and holes.
• the light emitting layer may be a white light emitting layer that emits white light or a blue light emitting layer that emits blue light.
• the blue light emitting layer usually contains a blue light emitting material that emits blue light.
• a general thing can be used as a blue light-emitting body.
• SrGa S: Ce, CaGa S: Ce, B which are disclosed in JP-A-7-122364 and JP-A-8-134440.
• a light body is preferably used.
• the blue luminescent material include fluorescent whitening agents such as benzothiazole, benzimidazole, and benzoxazole exemplified in JP-A-8-279394, JP-A-63-295695.
• fluorescent whitening agents such as benzothiazole, benzimidazole, and benzoxazole exemplified in JP-A-8-279394, JP-A-63-295695.
• Examples of the benzothiazole fluorescent whitening agent include 2-2 '-(p-phenylene divinylene) monobisbenzothiazole.
• Examples of the benzoimidazole-based fluorescent brightener include 2_ [2- [4 -— (2-benzimidazolyl) phenyl] bulu] benzimidazole or 2_ [2- (4-carboxyphenyl) bulu] benzimidazole. Sol and the like.
• benzoxazole-based optical brightener examples include 2,5_bis (5,7_di-tert-pentyl_2_benzoxazolyl) _1,3,4-thiadiazole, 4,4 '_Bis (5,7_t-pentyl_2_benzoxazolyl) stilbene or 2_ [2_ (4-cyclophenyl) bulu] naphtho [1,2_d] oxazole It is done.
• examples of the metal chelate oxinoid compound include 8- (triquinone) -tris (8-quinolinol) aluminum, bis (8-quinolinol) magnesium, bis (benzo [f] -8-quinolinol) zinc, etc. Examples thereof include hydroxyquinoline metal complexes and dilithium pintridione.
• examples of the styrylbenzene compounds include 1,4_bis (2-methylstyryl) benzene, 1,4_bis (3-methylstyryl) benzene, 1,4_bis (4-methylstyryl) benzene, and distyryl.
• examples of the distyrylvirazine derivative include 2,5_bis (4 methylstyryl) pyrazine, 2,5_bis (4-ethylylstyryl) pyrazine, 2,5_bis [2- (1— Naphthyl)) bier] pyrazine, 2,5 bis (4-methoxystyryl) pyrazine, 2,5 bis [2- (4-biphenyl) vinyl] pyrazine, or 2,5-bis [2- (1-pyrenyl) Vinyl] pyrazine and the like, or derivatives thereof.
• aromatic dimethylidin compounds examples include 1,4 phenylene range methylidin, 4,4 phenylene range methylidin, 2 methylidin, 1,4-p-terephedylene range methylidin, 9,10-anthracene.
• blue luminescent material examples include compounds represented by the general formula (Rs_Q) -AL-0-L disclosed in JP-A-5-258862. here,
• L is a hydrocarbon having 6 to 24 carbon atoms including a benzene ring
• _L is a phenolate ligand
• Q is a substituted 8 _quinolinolato ligand
• Rs is aluminum
• white light emission by the white light emitting layer can be obtained by superimposing light emitted from a plurality of light emitters.
• the white light-emitting layer in the present invention may be one that obtains white light emission by superimposing two-color light emission of two kinds of light emitters having a predetermined fluorescence peak wavelength, and three kinds of light emission layers having a predetermined fluorescence peak wavelength. You can also obtain white light emission by superimposing the three-color light emission of the illuminant. Especially, it is preferable that a white light emitting layer shows white light emission with few green light components.
• the green color conversion part partially on the green coloring part, a good green display can be obtained and the brightness of the green light can be improved, so that the balance of the color characteristics of the three primary colors is excellent. This is because it can be an organic EL display device.
• the white light emitting layer emits white light by a so-called two-wavelength light source that obtains white light emission by superimposing two-color light emission of two kinds of light emitters having a predetermined fluorescence peak wavelength. It is preferable.
• the white light emitting layer preferably contains a blue light emitter and a small amount of a red light emitter and emits white light from a two-wavelength light source.
• the white light emission obtained by such a white light emitting layer contains almost no green light component.
• the green color conversion part partially on the green coloration part, the white light emission can be improved. This is because a green display can be obtained and the brightness of green light can be improved, so that an organic EL display device having an excellent balance of the color characteristics of the three primary colors can be obtained.
• the “two-wavelength light source” here includes a case where the main light emission power is not the only two-wavelength light emission but the main light emission power.
• the blue phosphor used for the white light-emitting layer preferably has a fluorescence peak wavelength of 380 nm or more and less than 480 nm, more preferably 420 nm or more and less than 475 nm.
• a blue light emitter among the compounds described in, for example, JP-A-3-231970, International Publication No. WO92Z0 5131 or JP-A-7-26254, the above-described fluorescence condition is satisfied. Things. Specific examples include the compounds described in JP-A-6-207170.
• the red phosphor used for the white light-emitting layer has a fluorescence peak wavelength of 575 nm or more. More preferably, it is 580 nm or more and 620 nm or less.
• red light emitters include dicyanomethylenepyran derivatives, dicyanomethylenethiopyran derivatives, fluorescein derivatives, and perylene derivatives that are used as red starting laser dyes described in European Patent Publication No. 0281381. Can be mentioned.
• the content of the red light emitter is set in a range in which concentration quenching does not occur.
• the thickness of the light emitting layer is not particularly limited, but can be, for example, about 5 nm to 5 ⁇ m, and preferably about 5 nm to l z m.
• the method for forming the light emitting layer is not particularly limited as long as it is a method capable of high-definition patterning.
• vapor deposition, printing, inkjet, or spin coating casting, dating, bar coating, blade coating, roll coating, gravure coating, flexographic printing, spray coating, and self-organization And the like (alternate adsorption method, self-assembled monolayer method) and the like.
• coating or vapor deposition may be performed by a masking method, or a partition may be formed between the light emitting layers.
• a hole injection layer may be formed between the light emitting layer and the anode (transparent electrode layer or counter electrode layer). This is because by providing the hole injection layer, the injection of holes into the light emitting layer is stabilized and the light emission efficiency can be increased.
• a material generally used for a hole injection layer of an organic EL element can be used.
• the constituent material of the hole injection layer may be any material that has either a hole injection property or an electron barrier property, and may be an organic material or an inorganic material.
• the constituent material of the hole injection layer includes a triazole derivative, an oxadiazole derivative, an imidazole derivative, a polyarylalkane derivative, a pyrazoline derivative, a pyrazolone derivative, a phenylenediamine derivative, an arylamine derivative, and an amino substitution.
• conductive polymer oligomers such as thiophene oligomers can be exemplified.
• examples of the constituent material of the hole injection layer include borphyrin compounds, aromatic tertiary amine compounds, and styrylamine compounds.
• porphyrin compound examples include porphine, 1, 10, 15, 20-tetraphenyl 2-nitrone 21H, 23H-porphine copper ( ⁇ ), aluminum phthalocyanine lipide, or copper otamethyl phthalocyanine. .
• aromatic tertiary amine compound examples include N, N, ⁇ ', N'-tetraphenyl bis-nore-1,4'-diaminophenyl, ⁇ , ⁇ '-diphenyl ⁇ , ⁇ '- Bis-one (3-methylphenol) [1, 1'-biphenyl] — 4, 4'-diamin, 4— (di- ⁇ -trinoleamino) -one 4′— [4 (di- ⁇ —Tolylamino) styryl] stilbene, 3-methoxy-l 4 '_ ⁇ , ⁇ _diph ⁇ ninore aminostilbenzene, 4, 4'-bis [ ⁇ - (1-naphthyl) l ⁇ -phenylamino] biph enore, or 4, 4 ', 4' '-tris [ ⁇ - (3-methylphenyl) _ ⁇ _phenylamino] triphenylamine and the like
• the thickness of such a hole injection layer is not particularly limited, but can be, for example, about 5 ⁇ m to 5 ⁇ , and particularly about 5nm to 0.5 / im. It is preferable to do.
• an electron injection layer may be formed between the light emitting layer and the cathode (transparent electrode layer or counter electrode layer). This is because by providing the electron injection layer, the injection of electrons into the light emitting layer is stabilized, and the light emission efficiency can be increased.
• Examples of the constituent material of the electron injection layer used in the present invention include heterocyclic tetracarboxylic anhydrides such as nitro-substituted fluorene derivatives, anthraquinodimethane derivatives, diphenylquinone derivatives, thiopyran dioxide derivatives, naphthalene perylene, and the like.
• thiazole derivatives in which the oxygen atom of the oxadiazole ring of the oxadiazole ring is substituted with a thioadiene, carbodiimide, fluorenylidenemethane derivatives, anthraquinodimethane and anthrone derivatives, oxadiazole derivatives, Illustrate quinoxaline derivatives having a quinoxaline ring, metal complexes of 8-quinolinol derivatives such as tris (8-quinolinol) aluminum, phthalocyanines, metal phthalocyanines, or distyrylvirazine derivatives. It can be.
• the thickness of the electron injection layer is not particularly limited, and can be, for example, about 5 nm to 5 / im, and preferably about 5 nm to 0.5 / im. .
• the transparent electrode layer used in the present invention is for applying voltage to the organic EL layer sandwiched between the counter electrode layer and causing light emission at a predetermined position.
• This transparent electrode layer is formed on the color conversion layer side surface of the above-described organic EL element color filter substrate. For example, as shown in FIG. 6 and FIG. It is formed in a stripe shape having a width corresponding to the width of the opening. In this case, the pitch of the striped transparent electrode layer 11 is the same as the pitch of the openings of the light shielding portion 4.
• the transparent electrode layer in the present invention is usually composed of a metal oxide thin film having transparency and conductivity.
• metal oxides include indium tin oxide (ITO), indium oxide, zinc oxide, and stannic oxide.
• a method for forming such a transparent electrode layer for example, a method of forming a metal oxide thin film by a vapor deposition method or a sputtering method and then patterning by a photolithography method is preferably used.
• the counter electrode layer used in the present invention constitutes the other electrode for causing the organic EL layer to emit light, and is an electrode having a charge opposite to that of the transparent electrode layer. This counter electrode layer is formed on the organic EL layer.
• the counter electrode layer in the present invention is usually composed of a metal, a alloy, or a mixture thereof having a work function as small as about 4 eV or less. Specifically, sodium, sodium potassium alloy, magnesium, lithium, magnesium / copper mixture, magnesium / silver mixture, magnesium / aluminum mixture, magnesium Z indium mixture, aluminum / aluminum oxide (Al 2 O 3) mixture , Indium or lithium / aluminum
• a mixture, a rare earth metal, etc. can be illustrated. More preferably, a magnesium / silver mixture, a magnesium / aluminum mixture, a magnesium Z indium mixture, an aluminum Z aluminum oxide (Al 2 O 3) mixture, or a lithium / aluminum mixture.
• the counter electrode layer preferably has a sheet resistance of several hundred ⁇ / cm or less.
• the thickness of the counter electrode layer is preferably about 10 nm to l ⁇ , more preferably 5
• a method for forming such a counter electrode layer a method of forming a thin film by a vapor deposition method or a sputtering method and then patterning by a photolithography method is preferably used.
• an insulating layer may be formed between the striped transparent electrode layers so as to correspond to the light shielding portion.
• a partition wall functioning as a mask for forming a light emitting layer or the like may be formed on the insulating layer.
• a material for forming the partition wall for example, a photocurable resin such as a photosensitive polyimide resin or an acrylic resin, a thermosetting resin, or an inorganic material can be used. In this case, you may perform the process which changes the surface energy (wetting property) of a partition part.
• the driving method of the organic EL display device of the present invention may be a shift or shift of a noisy matrix or an active matrix.
• the present invention is not limited to the above embodiment.
• the above-described embodiment is an example, and has substantially the same configuration as the technical idea described in the claims of the present invention, and the one that exhibits the same function and effect is a good one. However, it is included in the technical scope of the present invention.
• a transparent base material 150 mm ⁇ 150 mm, 0.7 mm thick soda glass (manufactured by Central Glass Co., Ltd.) was prepared.
• a thin film (thickness 0.2 ⁇ ) of oxynitride composite chromium was formed on the entire surface of one side of the transparent substrate by sputtering.
• a photosensitive resist is applied onto the composite oxynitride thin film, mask exposure, development, and etching of the composite oxynitride thin film
• rectangular openings of 80 / im X 280 / im are arranged in a matrix with a pitch of 100 ⁇ m in the short side direction and a pitch of 300 ⁇ m in the long side direction. did.
• a coating solution for forming colored portions of red, green and blue was prepared.
• Condensed azo pigments manufactured by Chinoku 'Specialty' Chemicals, Chromophthal Red BRN
• phthalocyanine green pigments Lionol Green 2Y—301, manufactured by Toyo Ink Co., Ltd.
• anthraquinone pigments (Ciba 'Special Chemicals, Chromophthal Blue A3R) were used.
• polybulu alcohol (10% aqueous solution) was used as the binder resin.
• Each colorant was blended at a ratio of 1 part by weight with respect to 10 parts by weight of the polybula alcohol aqueous solution, and sufficiently mixed and dispersed. Further, 1 part by weight of ammonium dichromate was added as a cross-linking agent to 100 parts by weight of the obtained solution to obtain each colored portion forming coating solution.
• Each colored portion was formed using the above-described coating liquid for forming colored portions. That is, on the transparent base material on which the black matrix was formed, a red colored portion forming coating solution was applied by a spin coating method and pre-baked at 100 ° C. for 5 minutes. Then, it exposed using the photomask and developed with the developing solution (0.05% KOH aqueous solution). Next, post-bake for 60 minutes at 200 ° C was performed, synchronized with the pattern of the black matrix, and a striped red colored part with a width of 85 / im and a thickness of 1.5 / im, with the width direction being black It was formed so as to be in the short side direction of the opening of the matrix.
• the green colored portion forming coating solution and the blue colored portion forming coating solution were sequentially used to form striped green colored portions and blue colored portions. Thereby, a colored layer in which the colored portions of the three primary colors were repeatedly arranged in the width direction was formed.
• a coating solution for forming the transmission area (transparent photosensitive resin composition, product name: Color Mosaic CB-701, manufactured by Fuji Hunt Electronics Technology Co., Ltd.) is spin-coated on the black matrix and colored layer. Apply by 100. Pre-bake for 5 minutes at C. Next, after patterning by photolithography, post baking was performed at 200 ° C. for 60 minutes. This gives a width of 85 xm and a thickness of 2 on the blue and red colored areas. Each of the 5 ⁇ m stripe-shaped transmission portions was formed.
• FIG. 1 1 (as shown, the green colored tone (this, width 10 zm, gap 5 ⁇ m, thickness 2.5 ⁇ m) was formed as a striped green color conversion part 3G.
• a flattening layer forming coating solution was prepared by diluting an acrylate-based photocurable resin (manufactured by Nippon Steel Chemical Co., Ltd., trade name: V-259PA / PH5) with propylene glycol monomethyl ether acetate, This flat layer forming coating solution is applied by spin coating on the color conversion layer, pre-baked at 120 ° C for 5 minutes, and then irradiated with ultraviolet rays to a dose of 300 mJ. After exposure, post-bake at 200 ° C for 60 minutes to form a transparent flattening layer with a thickness of 2 ⁇ m to cover the entire colored layer and color conversion layer. Formed.
• an acrylate-based photocurable resin manufactured by Nippon Steel Chemical Co., Ltd., trade name: V-259PA / PH5
• This flat layer forming coating solution is applied by spin coating on the color conversion layer, pre-baked at 120 ° C for 5 minutes, and then irradiated with ultraviolet rays to
• an indium tin oxide (ITO) electrode film having a thickness of 150 nm is formed on the planarizing layer by ion plating, a photosensitive resist is applied on the ITO electrode film, mask exposure, development, and ITO electrode film are applied. Etching was performed to form a transparent electrode layer.
• This transparent electrode layer is a striped pattern with a width of 80 / m formed so as to run on the flat substrate layer from the transparent substrate, and is positioned on each colored portion of the colored layer on the color conversion layer. It was something to do.
• an insulating layer forming coating solution diluted with toluene with a norbornene resin JSR Co., Ltd., ARTON
• an insulating film thickness 1 ⁇ m
• beta 100 ° C., 30 minutes
• a photosensitive resist was applied on the insulating film, mask exposure, development, and etching of the insulating film were performed to form an insulating layer.
• This insulating layer is arranged so that the opening of the insulating layer is located in the opening of the black matrix, and the opening of the insulating layer is 90 ⁇ m X 290 ⁇ m larger than the opening of the black matrix.
• the shape was rectangular.
• partition wall coating manufactured by Nippon Zeon Co., Ltd., photoresist, ZPN1100 was applied over the entire surface to cover the insulating layer by spin coating, and pre-beta (70 ° C, 30 minutes) was performed. It was.
• the partition wall had a shape with a height of 10 zm, a lower part (insulating layer side) width of 15 ⁇ m, and an upper part width of 26 ⁇ m.
• an organic EL layer composed of a hole injection layer and a white light emitting layer was formed by vacuum vapor deposition using the partition wall as a mask.
• N ⁇ '-diphenyl 1 ⁇ , ⁇ ⁇ '-bis (3-methylphenyl) 1 [1, ⁇ -biphenyl] 1, 4'-diamin is used as an opening corresponding to the image display area.
• the film is formed by vapor deposition up to 60 nm through a photomask equipped with a mask, and the partition walls become a mask pattern.
• the material for forming the hole injection layer passes only between the partition walls and is positively formed on the transparent electrode layer. A hole injection layer was formed.
• tris (8-quinolinol) aluminum was deposited to a thickness of 20 nm to form an electron injection layer.
• the organic EL layer thus formed was present between the partition walls as a stripe-like pattern having a width of 280 ⁇ .
• a partition electrode portion was used as a mask to form a 200-nm-thick counter electrode layer made of magnesium Z-silver compound on the organic EL layer.
• This counter electrode layer was present on the white organic EL layer as a stripe pattern having a width of 280 zm.
• an organic EL display device was produced.
• An organic EL display device was produced in the same manner as in Example 1 except that the color conversion layer was not formed in Example 1.
• a transparent electrode layer is obtained by applying a voltage of DC 8.5 V to the transparent electrode layer and the counter electrode layer of the organic EL display device of Example 1 and Comparative Example 1 at a constant current density of 10 mA / cm 2 and continuously driving the transparent electrode layer.
• the white light emitting layer at a desired portion where the counter electrode layer and the counter electrode layer intersect was caused to emit light.
• CIE chromaticity coordinates (JIS Z 8701) for the emission of each color observed on the opposite side of the transparent substrate after color conversion in the color conversion layer or transmission as it is and color correction in the colored layer. was measured.
• Example 1 an organic EL display device was produced in the same manner as in Example 1 except that a colored layer was formed as shown below.
• a coating solution for forming colored portions of red, green and blue was prepared.
• Condensed azo pigments manufactured by Chinoku 'Specialty' Chemicals, Chromophthal Red BRN
• phthalocyanine green pigments Lionol Green 2Y—301, manufactured by Toyo Ink Co., Ltd.
• anthraquinone pigments (Ciba 'Special Chemicals, Chromophthal Blue A3R) were used.
• acrylic UV curable resin composition (acrylic UV curable resin 20% ⁇ acrylic UV curable resin monomer 20% ⁇ additive 5% ⁇ propylene glycol monomethyl ether acetate (PGMEA) 55 %) was used.
• Acrylic UV curable resin composition Each colorant was blended at a ratio of 1 part (all parts are based on mass) to 10 parts of the product and sufficiently mixed and dispersed to obtain a coating solution for forming colored parts.
• Each colored portion was formed using the above-described coating liquid for forming colored portions. That is, on the transparent base material on which the above black matrix was formed, the red colored portion forming coating solution was applied by a spin coating method, and pre-baked at 120 ° C. for 2 minutes. Then, exposure using a photomask (accumulated exposure 300MjZcm 2), was present image with a developer solution (0. 05./ ⁇ Kappa_ ⁇ _Ita solution). Next, post-bake for 60 minutes at 230 ° C was performed, and synchronized with the black matrix pattern. Striped red colored parts with a width of 85 xm and a thickness of 1.5 xm, with the width direction being black.
• the green colored portion forming coating solution and the blue colored portion forming coating solution were sequentially used to form striped green colored portions and blue colored portions. As a result, a colored layer in which the colored portions of the three primary colors were repeatedly arranged in the width direction was formed.
• the organic EL display device of Example 2 was capable of high brightness, high color purity, and display of three primary colors.
• soda glass manufactured by Central Glass Co., Ltd.
• a thickness of 370 mm ⁇ 470 mm and a thickness of 0.7 mm was prepared.
• a thin film (thickness 0.2 ⁇ ) of oxynitride composite chromium was formed by sputtering.
• a photosensitive resist is applied onto this oxynitride composite chrome thin film, mask exposure, development, and etching of the oxynitride composite chrome thin film are sequentially performed, and a rectangular opening of 80 ⁇ m X 280 ⁇ m becomes short.
• a black matrix arranged in a matrix with a pitch of 100 ⁇ m in the side direction and a pitch of 300 xm in the long side direction was formed.
• a coating solution for forming colored portions of red, green and blue was prepared.
• Condensed azo pigments manufactured by Chinoku 'Specialty' Chemicals, Chromophthal Red BRN
• phthalocyanine green pigments Lionol Darin 2Y-301, manufactured by Toyo Ink Co., Ltd.
• anthraquinone pigments Ti's Chemikanorezu, chromophthal blue A3R
• acrylic UV curable resin composition (acrylic UV curable resin 20%, acrylic UV curable resin monomer 20%, additive 5%, propylene glycol monomethyl ether Acetate (PGMEA) 55%) was used. Each colorant is blended at a ratio of 1 part (all parts are based on mass) to 10 parts of the acrylic UV curable resin composition, and thoroughly mixed and dispersed. Got.
• Each colored portion was formed using the above-described coating liquid for forming colored portions. That is, on the transparent base material on which the above black matrix was formed, the red colored portion forming coating solution was applied by a spin coating method, and pre-baked at 120 ° C. for 2 minutes. Then, exposure using a photomask (accumulated exposure 300MjZcm 2), was present image with a developer solution (0. 05./ ⁇ Kappa_ ⁇ _Ita solution). Next, post-bake for 60 minutes at 230 ° C was performed, and synchronized with the black matrix pattern. Striped red colored parts with a width of 85 xm and a thickness of 1.5 xm, with the width direction being black.
• a green colored portion forming coating solution and a blue colored portion forming coating solution are sequentially used to obtain a stripe-shaped green colored portion having a width of 85 / m and a thickness of 1.6 / im, and a width of 85 / im and a thickness.
• a striped blue colored part of 1 ⁇ 6 ⁇ was formed.
• a colored layer in which the colored portions of the three primary colors were repeatedly arranged in the width direction was formed.
• An alkali-soluble negative photosensitive resist in which a green conversion phosphor (manufactured by Aldrich, Coumarin 6) is dispersed is used as a coating solution for forming a green color conversion part, and this coating solution for forming a green color conversion part is used as a black matrix and coloring.
• a green conversion phosphor manufactured by Aldrich, Coumarin 6
• this coating solution for forming a green color conversion part is used as a black matrix and coloring.
• a flat type obtained by diluting an acrylate-based photocurable resin (manufactured by Nippon Steel Chemical Co., Ltd., trade name: “V_259PA / PH5”) with propylene glycol monomethyl etherate.
• V_259PA / PH5 propylene glycol monomethyl etherate.
• Pre-baking was performed at 0 ° C for 5 minutes.
• post-baking is performed at 200 ° C for 60 minutes, and transparent flattening covering the entire color layer and color conversion layer with a thickness of 2 ⁇ on the color conversion layer A layer was formed.
• Argon gas introduction amount 40 sccm, RF power: 430 kW, substrate temperature: 100.
• the film was formed with C, and a 150 nm thick silicon oxynitride film was laminated to form a transparent gas barrier layer.
• a color filter substrate for an organic EL element was produced by the series of operations described above.
• an indium tin oxide (ITO) electrode film with a thickness of 150 nm is formed on the gas barrier layer of the color filter substrate for the organic EL element by an ion plating method, and a photosensitive resist is applied on the electrode film. Then, mask exposure, development, and etching of the electrode film were performed to form a transparent electrode layer.
• ITO indium tin oxide
• a chromium thin film (thickness 0 ⁇ 2 / m) is formed by sputtering on the entire surface of the gas barrier layer so as to cover the transparent electrode layer, a photosensitive resist is applied on the chromium thin film, and a mask is formed. Exposure, development, and etching of the chromium thin film were performed to form auxiliary electrodes. This auxiliary electrode was a striped pattern formed on the transparent electrode layer so as to run on the color conversion layer from the transparent substrate.
• a coating liquid for insulating layer formation in which ARTON a norbornene resin with an average molecular weight of approximately 100000, manufactured by iSR, is diluted with toluene, is applied onto the gas barrier layer so as to cover the transparent electrode layer by spin coating.
• beta 100 ° C., 30 minutes
• a photosensitive resist was applied on the insulating film, mask exposure, development, and etching of the insulating film were performed to form an insulating layer.
• This insulating layer is a striped pattern (width 20 ⁇ m) that intersects the transparent electrode layer at a right angle, and is located on the black matrix.
• the partition wall coating manufactured by Nippon Zeon Co., Ltd., photoresist, ZPN1100 It was applied to the entire surface so as to cover the insulating layer by the method, and pre-beta (70 ° C, 30 minutes) was performed. Thereafter, exposure was performed using a predetermined photomask, development was performed with a developing solution (manufactured by Zeon Corporation, ZTMA-100), and then post beta (100 ° C., 30 minutes) was performed. As a result, a partition wall was formed on the insulating layer.
• the partition wall had a shape with a height of 10 zm, a lower part (insulating layer side) width of 15 ⁇ m, and an upper part width of 26 ⁇ m.
• an organic EL layer composed of a hole injection layer, a white light emitting layer, and an electron injection layer was formed by vacuum deposition using the partition wall as a mask.
• tris (8-quinolinol) aluminum was deposited to a thickness of 20 nm to form an electron injection layer.
• the organic EL layer formed in this manner exists between the partition walls as a stripe pattern with a width of 280 / im, and a dummy organic layer with the same layer structure on the upper surface of the partition wall. An EL layer was formed.
• a partition electrode portion was used as a mask to form a 200-nm-thick counter electrode layer made of magnesium Z-silver compound on the organic EL layer.
• This counter electrode layer has a width of 280 A ⁇ m stripe pattern exists on the organic EL layer, and a dummy counter electrode layer was also formed on the upper surface of the partition wall.
• the organic EL element was sealed to obtain an organic EL display device.
• Example 3 an organic EL display device was produced in the same manner as in Example 3 except that the thickness of the green color conversion portion was 10.8 m.
• An organic EL display device was produced in the same manner as in Example 3 except that the color conversion layer was not formed in Example 3.
• Example 3 an organic EL display device was produced in the same manner as in Example 3 except that a colored layer and a color conversion layer were formed as shown below.
• red and blue colored portion forming coating solutions were prepared.
• the red colorant is a condensed azo pigment (Chinoku 'Specialty' Chemicals, Chromophthal Red BRN), and the blue colorant is an anthraquinone pigment (Ciba 'Specialty' Chemikanorez, Chromophthalate). Blue A3R) was used respectively.
• binder resin acrylic UV curable resin composition (acrylic UV curable resin 20%, acrylic UV curable resin monomer 20%, additive 5%, propylene glycol monomethyl ether acetate (PG MEA) 55% ) was used.
• Blend 10 parts of the acrylic UV curable resin composition with 1 part of each colorant all parts are based on mass), and mix and disperse thoroughly to form red and blue colored parts.
• a coating solution was obtained.
• a green colored part forming coating solution was prepared.
• a phthalocyanine green pigment manufactured by Toyo Ink Co., Ltd., Lionol Green 2Y-301
• the binder resin the above acrylic UV curable resin composition was used. Blend 10 parts of the acrylic UV curable resin composition with 1 part of the colorant (all parts are based on mass) and thoroughly mix and disperse to obtain a green colored part forming coating solution. It was.
• Each colored portion was formed using the above-described coating solutions for forming colored portions. That is, on the transparent base material on which the above black matrix was formed, the red colored portion forming coating solution was applied by a spin coating method, and pre-baked at 120 ° C. for 2 minutes. Then, exposure using a photomask (accumulated exposure 300MjZcm 2), was present image with a developer solution (0. 05./ ⁇ Kappa_ ⁇ _Ita solution). Next, post-bake for 60 minutes at 230 ° C was performed, and synchronized with the black matrix pattern. Striped red colored parts with a width of 85 xm and a thickness of 3.0 xm, with the width direction being black.
• a green colored portion forming coating solution and a blue colored portion forming coating solution were sequentially used to form a striped green colored portion having a width of 85 zm and a thickness of 1.6 ⁇ m, and a width of 85 ⁇ and a thickness of 3
• a blue colored portion having an O xm stripe shape was formed.
• the colored portions of the three primary colors are repeatedly arranged in the width direction.
• a colored layer was formed.
• An alkali-soluble negative photosensitive resist in which a green conversion phosphor (manufactured by Aldrich, Coumarin 6) is dispersed is used as a coating solution for forming a green color conversion part, and this coating solution for forming a green color conversion part is used as a black matrix and coloring.
• a green conversion phosphor manufactured by Aldrich, Coumarin 6
• this coating solution for forming a green color conversion part is used as a black matrix and coloring.
• the organic EL display device of Example 5 was capable of observing a vivid green color and realized a wider color reproduction range.

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• 2006
  • 2006-01-17 WO PCT/JP2006/300485 patent/WO2006077808A1/ja not_active Application Discontinuation
  • 2006-01-18 TW TW095101854A patent/TWI395507B/zh not_active IP Right Cessation

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