WO2005086541A1 - 有機エレクトロルミネッセンス素子及び表示装置 - Google Patents
有機エレクトロルミネッセンス素子及び表示装置 Download PDFInfo
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- WO2005086541A1 WO2005086541A1 PCT/JP2005/003734 JP2005003734W WO2005086541A1 WO 2005086541 A1 WO2005086541 A1 WO 2005086541A1 JP 2005003734 W JP2005003734 W JP 2005003734W WO 2005086541 A1 WO2005086541 A1 WO 2005086541A1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/22—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
- H05B33/24—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers of metallic reflective layers
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- 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
- H10K59/80—Constructional details
- H10K59/875—Arrangements for extracting light from the devices
- H10K59/876—Arrangements for extracting light from the devices comprising a resonant cavity structure, e.g. Bragg reflector pair
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/852—Arrangements for extracting light from the devices comprising a resonant cavity structure, e.g. Bragg reflector pair
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
Definitions
- the present invention relates to an organic electroluminescent (EL) device, and more particularly to a white organic EL device.
- EL organic electroluminescent
- Organic EL is expected as a next-generation flat panel display because of its properties such as self-luminous elements.
- a full-color display method a three-color coating method, a color conversion (CCM) method, and a white color filter (CF) method have been proposed, but which method is superior for large displays, It's always clear!
- the three-color coating method which occupies a relatively large number, uses a high-definition vapor deposition mask, but has a problem in increasing the size.
- the white CF method does not require a high-definition evaporation mask and can use CF used in LCDs. Therefore, it is expected to be a large organic EL display.
- the conventional white CF method has a problem in color reproducibility as a display.
- organic EL white light is obtained by mixing colors of organic materials having a plurality of emission colors.
- the color purity of the luminescence after transmission deteriorates due to the large half width as described above.
- the color purity can be improved, but the percentage of light after transmission decreases, which causes an increase in power consumption.
- a first electrode made of a light-reflective material, an organic layer having an organic light-emitting layer, a translucent reflective layer, and a second electrode made of a transparent material are sequentially laminated, and the organic layer serves as a resonance portion.
- each pixel of R, G, B As a structure in which an organic EL layer is sandwiched between a reflective layer and a transparent layer, a color filter is arranged on the light output side or the external light incident side of the transparent layer (for example, Patent Document 2).
- Patent Document 1 International Publication No. 2001Z039554 pamphlet
- Patent Document 2 Japanese Patent Application Laid-Open No. 14-373776
- An object of the present invention is to provide an organic EL element and a display device having excellent color purity.
- the present inventors have proposed that an organic EL element having a specific element configuration sandwiched between two light reflection layers can be applied to a visible light when the optical path length formed by the two reflection surfaces is set to a specific value.
- the present inventors have found that three or more wavelength characteristics can be provided in a wavelength range, and have completed the present invention.
- the following organic EL element and display device can be provided.
- An organic electroluminescent device in which at least one of the first light reflection layer and the second light reflection layer is semi-transmissive.
- organic electroluminescent device according to 1, wherein the organic electroluminescent device has at least three peaks between 400 and 800 nm.
- first transparent electrode and Z or the second transparent electrode are In, Sn, Zn, and Cd
- a display device comprising: the organic electroluminescent device according to any one of 1 to 6; and a color conversion member.
- a display device comprising: the organic electroluminescent device according to any one of Items 1 to 6, and a color filter.
- the light emitted from the organic light emitting layer is reflected between the light interference portions to receive the light interference effect.
- the spectrum of the light that comes out can have a peak of a specific wavelength.
- the peak of a specific wavelength can be sharpened.
- color purity is increased.
- the use of the color conversion member and the color filter further enhances the color purity. For example, when it is desired to take out three colors using a color filter, the device can make the spectrum in which the three colors are emphasized in advance, so that light with more excellent color purity can be obtained.
- FIG. 1 is a view showing an organic EL device of Embodiment 1.
- FIG. 2 is a graph showing a spectrum of a reflected light of the power of the organic EL device of the first embodiment.
- FIG. 3 (a) is a graph showing the white light emission spectrum of the organic light emitting layer
- FIG. 3 (b) is a graph showing the light reflection characteristics of the organic EL element not driven
- FIG. 3 (c) is the EL light emission Is a graph showing the spectrum of light emitted outside the device.
- FIG. 4a is a diagram showing an example of a configuration of an organic EL device.
- FIG. 4b is a diagram showing another example of the configuration of the organic EL device.
- FIG. 4c is a diagram showing another example of the configuration of the organic EL element.
- FIG. 4d is a diagram showing another example of the configuration of the organic EL element.
- FIG. 4e is a diagram showing another example of the configuration of the organic EL element.
- FIG. 4f is a diagram showing another example of the configuration of the organic EL element.
- FIG. 4g is a diagram showing another example of the configuration of the organic EL device.
- FIG. 5 is a view showing an organic EL device of Embodiment 2.
- FIG. 6 is a graph showing the spectrum of the reflected light of the power of the organic EL device of Embodiment 2.
- FIG. 7a is a view showing the organic EL device prepared in Example 1.
- FIG. 7b is a view showing the organic EL device produced in Comparative Example 1.
- FIG. 7c is a view showing the organic EL device prepared in Example 2.
- FIG. 7d is a view showing the organic EL device prepared in Comparative Example 2.
- FIG. 1 is a diagram showing an organic EL device according to one embodiment of the present invention
- FIG. 2 is a graph showing a spectrum of reflected light from the organic EL device.
- This element includes a substrate, a first light reflection layer 2, a first transparent electrode 3, an organic light emitting layer 4, a second transparent electrode 5, and a second light reflection layer 6 laminated in this order.
- the second light reflection layer 6 is semi-transparent.
- the spectrum of the reflected light has at least three peaks having a half width of 150 nm or less.
- the emission spectrum from the device appears as a synergistic effect between the emission spectrum specific to the EL material and the transmission characteristics due to this interference effect. Furthermore, by taking a specific optical path length L, it is possible to have three or more wavelength selectivities in the visible light wavelength region.
- the reflection intensity at that wavelength is measured.
- the thickness between the first and second light reflecting layers 2, 6 is 100-lOOOnm.
- a color conversion member In order to produce a plurality of colors (colorization) with the element, it is preferable to stack a color conversion member and a color filter on the light emission surface side of the element.
- a color conversion member a fluorescent member that converts a part of the received light into light of another wavelength can be used. You may use both a color conversion member and a color filter.
- the color filter may be an ordinary one
- this device can have an emission spectrum in advance according to the transmission characteristics of the color filter. Can produce very pure colors.
- a light diffusing means may be laminated on the first and Z or second light reflecting layers 2 and 6.
- Light diffusing means include those with a myriad of fine grooves and holes on the surface of a transparent plate, those with minute bubbles and fine particles dispersed inside the transparent plate itself, those with microprisms formed on the surface of the transparent plate.
- FIG. 3 (a) shows the white light emission spectrum of the organic light emitting layer itself
- FIG. 3 (b) shows the light transmission characteristics of the device, showing the reflection spectrum measured without operating the device.
- 3 (b) shows that there are local minimum values of the reflectance at 470 nm, 550 nm, and 620 nm, and conversely, the light emitted inside the device is selectively transmitted at these wavelengths.
- the element when the element is energized and driven, the spectrum of light emitted from the reflection side to the outside of the element has a maximum value of the three primary colors as shown in FIG. 3 (c).
- the device when combined with a color filter, the device becomes particularly excellent in color reproducibility.
- the maximum value of the three primary colors can be obtained only by adjusting the optical path length. As a result, light with extremely high color purity can be efficiently extracted.
- the optical path length is adjusted by changing the thickness between the first and second light reflection layers 2 and 6, ie, the type and thickness of the layer between them.
- These layers include at least an organic light emitting layer.
- the layer between the first and second light reflection layers 2 and 6 is formed. Thickness can be adjusted
- Optical interference occurs in a portion of the substrate 40 between the first light reflection layer 41 and the second light reflection layer 42.
- FIG. 4a substrate 40Z first light reflection layer 41Z first transparent electrode 45aZ organic layer 43Z second transparent electrode 45bZ light transmitting protective layer 44Z second light reflection layer 42
- FIG. 4b Substrate 40Z first light reflective layer 41Z first transparent electrode 45aZ hole transport layer 46Z organic layer 43Z second transparent electrode 45bZ second light reflective layer 42
- FIG. 4c Substrate 40Z first light reflection layer 41Z first transparent electrode 45aZ organic layer 43Z electron transport layer 47Z second transparent electrode 45bZ second light reflection layer 42
- the provision of the light-transmitting protective layer 44 generally results in a thin film and low mechanical strength! ⁇
- the transparent electrode can be reinforced.
- the electrodes also include a semiconductor material that is more than just a low-resistance metal.
- the transparent electrode is not particularly limited, but when disposed between two reflective layers, it is preferable that the refractive index is close to that of the organic layer.
- the organic material layer is not particularly limited as long as it includes an organic light emitting layer.
- a fluorescent type or a phosphorescent type having higher luminous efficiency may be used.
- it is general to stack or mix a plurality of organic materials. For example, the following configurations are possible forces.
- the present invention is not limited to this.
- Each layer may be a single layer or a plurality of layers.
- a transparent substrate may be disposed on the light semi-transmissive layer to be a bottom emission type.
- FIG. 5 is a view showing an organic EL device according to another embodiment of the present invention.
- This device is different from the device of Embodiment 1 in that not only the second light reflection layer 6 but also the first light reflection layer 2 is made to be semi-transmissive.
- the transmitted light is The light is repeatedly reflected between the first and second light reflection layers 2 and 6 (d) and undergoes an optical interference effect, and has at least three local maximum values at a Statoluca wavelength of 400 to 800 nm.
- the spectrum of the transmitted light has at least three peaks having a half width of 150 nm or less. This is almost the opposite characteristic to the measurement of the reflected light of the side force of the second light reflection layer 6, and when viewed from the reflected light, as shown in FIG. It has a local minimum.
- the present embodiment also, by adjusting the thickness (optical path length) of the layers 3, 4, and 5 between the first and second light reflection layers 2, 6, Three or more maximum peaks can be obtained.
- the thickness between the first and second light reflecting layers 2, 6 is 100-lOOOnm. Due to this maximum peak characteristic, light of those wavelengths is selectively radiated when energized, and the color purity is improved.
- the configuration of the color conversion member, white light emission, light interference unit, and the like are the same as those in the first embodiment.
- At least one of the light reflecting layers transmits part of the light (semi-transmissive).
- a transparent inorganic compound having a larger refractive index than that of a metal or organic material layer can be used.
- specular reflection by a metal surface occurs
- an inorganic compound having a refractive index larger than that of an organic material layer light reflection occurs according to the difference in the refractive index.
- their thickness is reduced or the difference in refractive index is adjusted. Specific examples are shown below.
- the organic layer may have a function of injecting electrons or holes into the organic layer, but is not always necessary. It is also possible to inject electrons or holes in the hole injection layer or the electron injection layer.
- Such materials include Al, Ag, Au, Pt, Cu, Mg, Cr, Mo, W, Ta, Nb, Li, Mn, Ca, Yb, Ti, Ir, Be, Hf, Eu, Sr, Ba Or alloys of these.
- Metals generally have low visible light transmittance. However, visible light can be transmitted by reducing the film thickness There are substances that can be made. Examples of such a material include the metals and alloys described above.
- the refractive index is higher than that of the organic layer.
- metal oxides such as In, Sn, Zn, Cd, and Ti, other high-refractive index ceramic materials, and inorganic semiconductor materials.
- a resin or the like in which ultrafine particles such as titania are dispersed can be used.
- the transparent electrode is used to increase the optical path length, apply a driving voltage to the organic light emitting layer, and protect the Z or the adjacent light reflecting layer or the like mechanically or in the manufacturing process.
- the thickness is appropriately adjusted depending on the purpose.
- the material is an oxide of one or more elements selected from the group consisting of In, Sn, Zn, and Cd.
- the transparent electrode When the transparent electrode is used to apply a driving voltage to the organic light emitting layer, it functions as an anode or a cathode, or a part thereof.
- the transparent electrode does not necessarily need to be an anode or a cathode.
- the light reflection layer may function as the anode or the cathode, or a part thereof. Further, a member other than the transparent electrode and the light reflection layer may be provided as an anode or a cathode, or a part thereof.
- the anode preferably has a work function of 4.5 eV or more.
- the anode include indium tin oxide (ITO), indium zinc oxide (IZO), oxidized tin (NESA), gold, silver, platinum, and copper.
- ITO indium tin oxide
- IZO indium zinc oxide
- NESA oxidized tin
- gold silver, platinum, and copper.
- IZO indium zinc oxide
- IZO indium zinc oxide
- IZO is particularly preferable because it can be formed at room temperature and because the amorphous property is high, peeling of the anode and the like hardly occur.
- the sheet resistance of the anode is preferably 1000 ⁇ or less. More preferably, it is 800 ⁇ or less, even more preferably, 500 ⁇ or less.
- the transmittance of the anode to the light emission be greater than 10%. It is more preferably at least 30%, further preferably at least 50%.
- the thickness of the anode film is different from the optimum value depending on the material.
- a metal, an alloy, an electrically conductive compound having a low work function (4 eV or less), and a mixture thereof as an electrode material are used.
- an electrode material include sodium, sodium-potassium alloy, magnesium, lithium, magnesium-silver alloy, aluminum / silicon aluminum, aluminum-lithium alloy, indium, rare earth metal and the like.
- the cathode can be manufactured by forming a thin film from these electrode substances by a method such as evaporation or sputtering.
- the light transmittance of the cathode be higher than 10%.
- the sheet resistance as the cathode is preferably several hundreds of ohms Z or less.
- the light-transmitting protective layer is used to reinforce an adjacent transparent electrode. There is no restriction as long as the material is transparent. Transparent conductive materials can also be used.
- the organic light emitting layer As a method for forming the organic light emitting layer, a known method such as an evaporation method, a spin coating method, and an LB method can be applied. Further, as disclosed in Japanese Patent Application Laid-Open No. 57-51781, after a binder such as resin and a material conjugate are dissolved in a solvent to form a solution, the solution is spin-coated or the like.
- the organic light-emitting layer can also be formed by thin film formation.
- a material used for the organic light emitting layer a material known as a long-lived light emitting material can be used, and a fluorescent material or a phosphorescent material may be used. Phosphorescent materials are preferable because of their high luminous efficiency.
- a fluorescent material will be described as an example. It is desirable to use the material represented by the formula (1) as a light emitting material.
- Ar 1 is an aromatic ring having 6 to 50 carbon atoms, X is a substituent, 1 is an integer of 1 to 5, m is 0 to 6 Is an integer.
- Ar 1 is specifically a phenyl ring, a naphthyl ring, an anthracene ring, a biphenylene ring, an azulene ring, an acenaphthylene ring, a fluorene ring, a phenanthrene ring, a fluoranthene ring, or an acephenanthrylene ring , A triphenylene ring, a pyrene ring, a talycene ring, a naphthacene ring, a picene ring, a perylene ring, a pentaphene ring, a pentacene ring, a tetraphenylene ring, a hexaphene ring, a hexacene ring, a rubicene ring, a coronene ring, and a trinaphthylene ring.
- Preferable examples include a phenyl ring, a naphthyl ring, an anthracene ring, an acenaphthylene ring, a fluorene ring, a phenanthrene ring, a phneoleanthene ring, a triphenylene ring, a pyrene ring, a thalicene ring, a perylene ring, and a trinaphthylene ring.
- a phenyl ring, a naphthyl ring, an anthracene ring, a fluorene ring, a phenanthrene ring, a fluoranthene ring, a pyrene ring, a thalicene ring, a perylene ring and the like are mentioned.
- X is specifically a substituted or unsubstituted aromatic group having 6 to 50 nuclear carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 5 to 50 nuclear atoms, a substituted or unsubstituted aromatic heterocyclic group.
- Examples of the substituted or unsubstituted aromatic group having 6 to 50 nuclear carbon atoms include phenyl, 1 naphthyl, 2 naphthyl, 1 anthryl, 2 anthryl, 9 anthryl, 1-phenanthryl Group, 2 phenanthryl group, 3 phenanthryl group, 4-phenanthryl group, 9-phenanthryl group, 1 naphthacyl group, 2 naphthacyl group, 9 naphthacyl group, 1-pyrylyl group, 2-pyrylyl Group, 4-pyreyl group, 2-biphenyl-yl group, 3-biphenyl-yl group, 4-biphenyl-yl group, p-terphenyl 4-yl group, p-terphenyl 3-yl group, p-terfyl 2-yl group, m terfel 4-yl group, m terfel 3-yl group, m terfyl 2-yl group, o-tolyl group,
- Examples of the substituted or unsubstituted aromatic heterocyclic group having 5 to 50 nuclear atoms include a 1-pyrrolyl group, a 2-pyrrolyl group, a 3-pyrrolyl group, a pyrazur group, and a 2-pyridyl group.
- Examples of the substituted or unsubstituted alkyl group having 1 to 50 carbon atoms include methyl, ethyl, propyl, isopropyl, n-butyl, s-butyl, isobutyl, t-butyl, n-butyl Pentyl, n-hexyl, n-heptyl, n-octyl, hydroxymethyl, 1-hydroxyethyl, 2-hydroxyethyl, 2-hydroxyisobutyl, 1,2-dihydroxy Ethyl group, 1,3-dihydroxyisopropyl group, 2,3-dihydroxy-tert-butyl group, 1,2,3-trihydroxypropyl group, chloromethyl group, 1-chloroethyl group, 2-chloroethyl group , 2-chloroisobutyl, 1,2-dichloroethyl, 1,3-dichloroisopropyl, 2,3-dichloro-t-but
- a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms is a group represented by OY, and examples of Y include a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, and an s- group.
- Examples of a substituted or unsubstituted aralkyl group having 1 to 50 carbon atoms include a benzyl group, a 1-phenyl-ethyl group, a 2-phenyl-ethyl group, a 1-phenyl-isopropyl group, a 2-phenyl-isopropyl group, a 2-phenyl-isopropyl group, -L-t-butyl group, ⁇ -naphthylmethyl group, 1- ⁇ -naphthylethyl group, 2- ⁇ -naphthylethyl group, 1- ⁇ -naphthylisopropyl group, 2- ⁇ naphthylisopropyl group, j8-naphthylmethyl group, l-j8-naphthylethyl Group, 2j8-naphthylethyl group, 1-J8-naphthylisopropy
- a substituted or unsubstituted aryloxy group having 5 to 50 nuclear atoms is represented by —OY ′, and examples of Y ′ include phenyl, 1-naphthyl, 2-naphthyl, 1-anthryl, and 2-anthryl.
- a substituted or unsubstituted arylthio group having 5 to 50 nuclear atoms is represented by —SY ", and examples of Y" include phenyl, 1-naphthyl, 2-naphthyl, 1-anthryl, and 2-anthryl. , 9 anthryl, 1 phenanthryl, 2 phenanthryl, 3 phenanthryl,
- a substituted or unsubstituted carboxyl group having 1 to 50 carbon atoms is represented as COOZ, and examples of Z include methyl, ethyl, propyl, isopropyl, n-butyl, s-butyl, isobutyl, and the like.
- t-butyl group n-pentyl group, n-hexyl group, n-heptyl group, n-octyl group, hydroxymethyl group, 1-hydroxyethyl group, 2-hydroxyethyl group, 2-hydroxyisobutyl group, 1 1,2-dihydroxyethyl group, 1,3-dihydroxyisopropyl group, 2,3-dihydroxy-tert-butyl group, 1,2,3-trihydroxypropyl group, chloromethyl group, 1-chloroethyl group, 2- Cloethyl, 2-chloroisobutyl, 1,2-dichloroethyl, 1,3-dichloroisopropyl, 2,3-dichloro-t-butyl, 1,2,3-trichloropropyl, Bromomethyl group Lomoethyl group, 2-bromoethyl group, 2-bromoisobutyl group, 1,2 dibromoethyl group, 1,
- Examples of the substituted or unsubstituted styryl group include a 2-phenyl-1-butyl group, a 2,2-diphenyl-1-butyl group, a 1,2,2-triphenyl-1-butyl group and the like. Can be
- halogen group examples include fluorine, chlorine, bromine and iodine.
- n 1 is an integer of 115, preferably 112.
- m is an integer of 0-6, preferably 0-4.
- one Ar 1 may be the same or different.
- the light emitting performance can be improved.
- a material known as a pant material having a long life for example, can be used.
- a material represented by the formula (2) it is preferable to use a material represented by the formula (2) as a dopant material of a light emitting material.
- Ar 2 —Ar 4 is a substituted or unsubstituted aromatic group having 6-50 nuclear carbon atoms, a substituted or unsubstituted styryl group, and p is an integer of 1-4.
- Examples of the substituted or unsubstituted aromatic group having 6 to 50 nuclear carbon atoms include phenyl, 1 naphthyl, 2 naphthyl, 1 anthryl, 2 anthryl, 9 anthryl, 1-phenyl Phenanthryl group, 2 phenanthryl group, 3 phenanthryl group, 4-phenanthryl group, 9-phenanthryl group, 1 naphthatel group, 2 naphthatel group, 9 naphthatel group, 1-pyrreyl group, 2-pyrreyl 4-, 4-pyryl, 2-biphenyl, 3-biphenyl, 4-biphenyl, p-terfyl 4-yl, p-terfyl 3-yl , P-terfyl 2-yl group, m terfel 4-yl group, m terfel 3-yl group, m terfyl 2-yl group, o-tolyl group, m-tolyl group, ⁇ -tolyl group,
- substituted or unsubstituted styryl group examples include a 2-phenyl-1-butyl group, a 2,2-diphenyl-1-butyl group, a 1,2,2-triphenyl-1-butyl group and the like.
- p is an integer of 1 to 4.
- p Ar 3 and Ar 4 may be the same or different.
- the hole injection / transport layer is a layer that assists the injection of holes into the organic light emitting layer and transports it to the light emitting region.
- the ion mobility which has a large hole mobility, is usually as small as 5.5 eV or less.
- Such a hole injection / transport layer is preferably made of a material that transports holes to the organic light emitting layer with a lower electric field strength.
- the hole mobility force for example, when an electric field of 10 4 to 10 6 VZcm is applied , preferably if it is at least 10- 4 cm 2 ZV ⁇ seconds,.
- the material for forming the hole injecting / transporting layer is not particularly limited as long as it has the above-mentioned favorable properties. Conventionally, it is commonly used as a charge transporting material for holes in photoconductive materials. Or known neutral force used for the hole injection layer of the EL element Can be selected and used.
- Gazettes pyrazoline derivatives and pyrazolone derivatives (U.S. Pat. Nos. 3,180,729 and 4,278,746, JP-A-55-88064, and JP-A-55-88065).
- furenediamine derivatives U.S. Pat. No. 3,615,404, Japanese Patent Publication No. 51-10105, No. 46-3712, No. 47-).
- JP-A-59143, JP-A-55-52063, JP-A-55-52064, JP-A-55-46760, JP-A-55-85495, JP-A-57-11350, JP-A-57-148749, JP-A-2- And stilbene derivatives JP-A-61-210363, JP-A-61-228451, JP-A-61-14642, JP-A-61-72255, JP-A-62-47646, and 62
- the above-mentioned materials can be used.
- Porphyrin compounds (those disclosed in JP-A-63-29556965), aromatic tertiary amine compounds and styrylamines No. 4,127,412, JP-A-53-27033, JP-A-54-58445, JP-A-54-149634, JP-A-54-64299, and JP-A-55-64299.
- inorganic compounds such as p-type Si and p-type SiC can also be used as the material for the hole injection layer.
- the hole injection / transport layer can be formed by thin-filming the above-mentioned compound by a known method such as a vacuum evaporation method, a spin coating method, a casting method, and an LB method.
- the thickness of the hole injection / transport layer is not particularly limited, but is usually 5 nm to 5 m.
- the hole injecting / transporting layer may be composed of a single layer or may be a laminated layer.
- An organic semiconductor layer may be provided as a layer that assists hole injection or electron injection into the organic light emitting layer. Those having a conductivity of 10-1 G SZcm or more are preferable.
- Examples of the material for such an organic semiconductor layer include thiophene-containing oligomers, conductive oligomers such as arylamine-containing oligomers disclosed in JP-A-8-193191, and arylamine-containing oligomers.
- a conductive dendrimer such as a dendrimer can be used.
- an inorganic injection layer made of an inorganic material may be inserted between the anode and the hole injection layer to improve the charge injection property.
- the material used for the inorganic injection layer include aluminum oxide, aluminum nitride, titanium oxide, silicon oxide, germanium oxide, silicon nitride, boron nitride, molybdenum oxide, ruthenium oxide, and vanadium oxide. No.
- An electron transport layer can be provided between the cathode and the light emitting layer.
- the electron transporting layer is suitably selected in a film thickness of several nm- several m, 10 4 - is preferably having an electron mobility of 10- 5 cm 2 ZVs above 10 6 VZcm upon application of an electric field.
- a metal complex of 8-hydroxyquinoline or a derivative thereof is preferable.
- the metal complex of 8-hydroxyquinoline or a derivative thereof include a metal chelate toxinoid compound containing a chelate of oxine (generally, 8-quinolinol or 8-hydroxyquinoline).
- Alq described in the section of the light emitting material can be used as the electron injection layer.
- examples of the oxadiazole derivative include an electron transfer compound represented by the following general formula.
- Ar 5, Ar °, Ar 7, Ar 9, Ar 10, Ar 13 each represent a substituted or unsubstituted Ariru group may each also being the same or different.
- the Ar 8, Ar 11 and Ar 12 represent a substituted or unsubstituted arylene group, which may be the same or different, and may be the same.
- the aryl group is a phenyl group, a biphenyl group, an anthral group Group, perylenyl group, And a pyrenyl group.
- Examples of the arylene group include a phenylene group, a naphthylene group, a biphenylene group, an anthracene group, a perylenylene group, a pyrenylene group and the like.
- examples of the substituent include an alkyl group having 110 carbon atoms, an alkoxy group having 110 carbon atoms, and a cyano group.
- the electron transfer conjugate is preferably a thin film-forming material.
- electron-transportable conjugates include the following.
- the electron transport layer As a semiconductor constituting the electron transport layer, at least one element of Ba, Ca, Sr, Yb, Al, Ga, In, Li, Na, Cd, Mg, Si, Ta, Sb and Zn is used. Oxides, nitrides, oxynitrides, etc., alone or in combination of two or more.
- the inorganic compound constituting the electron transport layer is preferably a microcrystalline or amorphous insulating thin film. If the electron transport layer is composed of these insulating thin films, a more uniform thin film is formed, so that pixel defects such as dark spots can be reduced. Examples of such inorganic compounds include the above-described alkali metal chalcogenides, alkaline earth metal chalcogenides, halides of alkali metals, and halides of alkaline earth metals.
- Electron injection layer is a layer that assists the injection of electrons into the organic light-emitting layer.
- the electron mobility layer has a large electron mobility. is there. Examples of the electron injectable conjugate are shown below.
- Nitrogen-containing heterocyclic derivative represented by the following formula
- a 1 to A 3 are a nitrogen atom or a carbon atom.
- R represents an aryl group having 6 to 60 carbon atoms which may have a substituent; a heteroaryl group having 3 to 60 carbon atoms which may have a substituent; an alkyl group having 1 to 20 carbon atoms; A number 11-20 haloalkyl group, a carbon number 11-20 alkoxy group, n is an integer of 0 to 5, and when n is an integer of 2 or more, a plurality of Rs are the same or different from each other! /, You can! / ,.
- a plurality of adjacent R groups may be bonded to each other to form a substituted or unsubstituted carbocyclic aliphatic ring or a substituted or unsubstituted carbocyclic aromatic ring.
- Ar 14 is an aryl group having 6 to 60 carbon atoms which may have a substituent, or a heteroaryl group having 3 to 60 carbon atoms which may have a substituent.
- Ar 15 is a hydrogen atom, an alkyl group having 120 to 120 carbon atoms, a haloalkyl group having 112 carbon atoms, an alkoxy group having 112 carbon atoms, and an aryl group having 6 to 60 carbon atoms which may have a substituent. It is a heteroaryl group having 3-60 carbon atoms, having a group and a substituent.
- one of Ar "and Ar 15 may have a substituent and may have a condensed cyclic group having 10 to 60 carbon atoms, and may have a substituent and may have a heterocyclic group having 3 to 60 carbon atoms. It is a fused ring group.
- L ⁇ L 2 each represents a single bond, a condensed ring having 6 to 60 carbon atoms which may have a substituent, or a hetero condensed ring having 3 to 60 carbon atoms which may have a substituent. Or a fluorene group which may have a substituent.
- HAr is a nitrogen-containing heterocyclic ring having 3 to 40 carbon atoms which may have a substituent
- L 3 has a single bond, an optionally substituted arylene group having 6 to 60 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 60 carbon atoms or a substituted group. / !, Moyo! / ⁇ It is a funolelenlenylene group,
- Ar 16 is a divalent aromatic hydrocarbon group having 6-60 carbon atoms having a substituent! /
- Ar 17 has a substituent! /, Or may be an aryl group having 6 to 60 carbon atoms, or
- Japanese Patent Application Laid-Open No. 09-087616 discloses an electroluminescent element using a silacyclopentadiene derivative represented by the following formula:
- Q 1 and Q 2 each independently represent a saturated or unsaturated hydrocarbon group having 1 to 6 carbon atoms, an alkoxy group, an alkoxy-alkoxy group, an alkyloxy group, a hydroxy group, substituted or unsubstituted And a substituted or unsubstituted heterocyclic ring or a structure in which Q 1 and Q 2 are combined to form a saturated or unsaturated ring.
- R 1 — R 4 are each independently hydrogen, halogen, Substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, alkoxy group, aryloxy group, perfluoroalkyl group, perfluoroalkoxy group, amino group, alkylcarbyl group, arylcarbyl group, alkoxy Carboxy group, aryloxy carboxy group, azo group, alkyl carboxy group, aryl carboxy group, alkoxy carboxy group, aryloxy carboxy group Xy, sulfyl, sulfol, sulfol, silyl, phorbamoyl, aryl, heterocyclic, alkenyl, alkynyl, nitro, formyl, nitroso, formomi It has a structure in which a oxy group, an isocyano group, a cyanate group, an isocyanate group, a thiosinate group, an iso
- Q 3 and Q 4 each independently represent a saturated or unsaturated hydrocarbon group having 1 to 6 carbon atoms, an alkoxy group, an alkoxy-alkoxy group, an alkyl-oxy group, a substituted or unsubstituted aryl group.
- R 5 — R 8 are each independently hydrogen, halogen, Or an unsubstituted alkyl group having 1 to 6 carbon atoms, an alkoxy group, an aryloxy group, a perfluoroalkyl group, a perfluoroalkoxy group, an amino group, an alkyl group, an arylcarbon group, Alkoxy carboxy, aryloxy carb, azo, alkyl carboxy, aryl carboxy, alkoxy carboxy, aryloxy carboxy, aryloxy Luffier, sulfol, sulfal, silyl, sorbamoyl, aryl, heterocyclic, alkoxy, alkyl, nitro, formyl, nitroso, formyloxy, isocyano Group, a cyanate group, an isocyanate group
- R 6 and R 7 are not simultaneously satisfied with an aliphatic group forming a ring
- R 5 and R 8 are silyl groups
- R 6 , R 7 , Q 3 and Q 4 are each independently , From 1 to 6 carbon atoms monovalent hydrocarbon group or a hydrogen source
- Q 3 and Q 4 are not an alkyl group or a phenyl group.
- R 9 — R 16 and Q 8 are each independently a hydrogen atom, a saturated or unsaturated hydrocarbon group, an aromatic group, a heterocyclic group, a substituted amino group, a substituted boryl group, an alkoxy group or Q 5 , Q 6 and Q 7 each independently represent a saturated or unsaturated hydrocarbon group, aromatic group, heterocyclic group, substituted amino group, alkoxy group or aryloxy group. And the substituents of Q 7 and Q 8 may be mutually bonded to form a condensed ring.
- R represents an integer of 13; when r is 2 or more, Q 7 may be different.
- Q 9 and Q 1C> each independently represent a ligand represented by the following formula (3), and L 4 represents a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl Le group, a substituted or unsubstituted Ariru group, a substituted or unsubstituted heterocyclic group, oR 17 (R 1 7 is hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted a cycloalkyl group, a substituted Or an unsubstituted aryl group or a substituted or unsubstituted heterocyclic group.) :) (Q 11 and Q 12 represent. The same meaning as Q 9 and Q 10) shown in
- This metal complex has a strong property as an n-type semiconductor and has a large electron injection ability. Furthermore, since the energy generated during complex formation is low, the bond between the metal and the ligand of the formed metal complex is strengthened, and the fluorescent quantum efficiency as a light emitting material is also increased.
- substituents on the ring A 4 and A 5 to form a ligand of the above formula chlorine, bromine, iodine, halogen atom such as fluorine, methyl group, Echiru group, a propyl group, Substituted or unsubstituted alkyl groups such as butyl group, sec-butyl group, tert-butyl group, pentyl group, hexyl group, heptyl group, octyl group, stearyl group, trichloromethyl group, phenyl group, naphthyl group, 3-methylphenyl group, 3-methoxyphenyl group, 3-fluorophenyl group, 3-trichloromethylphenyl group, 3-trifluoromethylphenyl group, 3-trifluorophenyl group Substituted or unsubstituted aryl, methoxy, n-butoxy, tert-butoxy,
- Substituted or unsubstituted alkylthio group such as octylthio group, trifluoromethylthio group, etc., phenylthio group, p-trophenylthio group, ptert-butylphenylthio group, 3-fluorophenylthio group, pentafluorophenyl- Luthio group, 3-trif
- Substituted or unsubstituted arylthio groups such as fluoromethylphenylthio group, cyano group, nitro group, amino group, methylamino group, ethylamino group, ethylamino group, acetylamino group, dipropylamino group, dibutylamino group, diphenylamino group, etc.
- Mono- or di-substituted amino group bis (acetoxymethyl) amino group, bis (acetoxyethyl) amino group, bisacetoxypropyl) amino group, bis (acetoxybutyl) amino group, etc., hydroxyl group, siloxy group, acyl group, methylcarbamoyl group Dimethylcarbamoyl, ethylcarbamoyl, getylcarbamoyl, propylcarbamoyl, butylcarbamoyl, phenylcarbamoyl, carbamoyl, carboxylic acid, sulfonic acid, imide, cyclopentane, etc.
- Cycloalkyl groups such as cyclohexyl group, phenyl group, naphthyl group, biphenyl group, anthral group, phenyl group, phenyl group, fluoryl group, pyrenyl group, etc. , Birazinyl group, pyrimidinyl group, pyridazinyl group
- Triazyl Triazyl, indole, quinolinyl, atalydyl, pyrrolidyl, dioxal, piperidinyl, morpholidinyl, piperazyl, triathinyl, carbazolyl, Heterocyclic groups such as thiol, thiophenol, oxazolyl, oxazodazolyl, benzoxazolyl, thiazolyl, thiadiazolyl, benzothiazolyl, triazolyl, imidazolyl, benzimidazolyl, and brayl.
- the above substituents may be combined with each other to form a further 6-membered aryl ring or heterocyclic ring.
- an electron injection layer composed of an insulator or a semiconductor may be further provided between the cathode and the organic layer.
- an insulator it is preferable to use at least one metal compound selected from the group consisting of alkali metal chalcogenides, alkaline earth metal chalcogenides, halides of alkali metals and halides of alkaline earth metals.
- the electron injecting layer is composed of these alkali metal chalcogenides or the like, since the electron injecting property can be further improved.
- preferred alkali metal chalcogenides include, for example, Li0, LiO, NaS, NaSe and NaO.
- Preferred alkaline earth metal chalcogenides include, for example, CaO, BaO, SrO, Be0, BaS, and CaSe. Also, as a preferred alkali metal halide include, for example, LiF, NaF, KF, LiCl, KC1, and NaCl. Preferred alkaline earth metal halides include, for example, CaF, BaF, SrF, MgF and
- Fluorides such as BeF and halides other than fluorides may be mentioned.
- a reducing dopant is contained in the region for transporting electrons or the interface region between the cathode and the organic layer.
- a reducing dopant is defined as a substance that can reduce an electron transporting compound. Therefore, various substances having a certain reducing property are used, for example, alkali metals, alkaline earth metals, rare earth metals, alkali metal oxides, alkali metal halides, and alkaline earth metals. Ridge, alkaline earth metal halide, rare earth metal halide or rare earth metal halide, organic complex of alkali metal, organic complex of alkaline earth metal, organic complex of rare earth metal At least one substance selected from the group consisting of:
- preferable reducing dopants include Na (work function: 2.36 eV), K (work function: 2.28 eV), Rb (work function: 2.16 eV), and Cs (work function).
- Group force at least one selected alkali metal, Ca (work function: 2.9eV), Sr (work function: 2.0-2.5eV), and Ba (work function: 2.52 eV) force
- the group force is at least one selected from the group consisting of alkaline earth metals.
- the work function is particularly preferably 2.9 eV or less.
- more preferred reducing dopants are at least one alkali metal selected from the group consisting of K, Rb and Cs, more preferably Rb or Cs, and most preferably Cs It is.
- a reducing dopant having a work function of 2.9 eV or less a combination of these two or more alkali metals is also preferable, especially a combination containing Cs, for example, Cs and Na, Cs and K, It is preferably a combination of Cs and Rb or Cs, Na and ⁇ .
- Substrate As the substrate, a glass plate, a polymer plate or the like is preferably used.
- the glass plate soda lime glass, norium strontium-containing glass, lead glass, aluminosilicate glass, borosilicate glass, norium borosilicate glass, quartz and the like are particularly preferable.
- the polymer plate polycarbonate, acrylic, polyethylene terephthalate, polyether sulfide, polysulfone and the like are preferable.
- the organic EL device shown in FIG. 7a was produced as follows.
- the reflective electrode is covered so as to cover the reflective electrode with a thickness lOnm of N, N, and one screw (N, N, one die roll).
- HI film N-diphenyl 4, 4'-diamino-1,1 'biphenyl film
- molybdenum trioxide 40 1
- HI film N-diphenyl 4, 4'-diamino-1,1 'biphenyl film
- molybdenum trioxide 40 1
- NPD film (1naphthyl) -N-phenylamino] biphenyl film (hereinafter abbreviated as “NPD film”) having a thickness of 60 nm is formed on the HI film. ) was formed.
- This NPD film functions as the hole transport layer 64.
- NPD and coumarin 6 were co-evaporated at a weight ratio of 40: 1 to a film thickness of lOnm, and a green organic light emitting layer 65 was formed.
- the following styryl derivative DPVDPAN and compound (B1) were deposited at a weight ratio of 40: 1 to form a blue organic light emitting layer 66 at a thickness of 30 nm.
- Alq 8-quinolinol aluminum
- DCJTB DCJTB
- IZO is deposited at 160 nm and metal Ag is deposited at 5 nm, and a second transparent electrode 70 and a semi-transmissive metal layer 71 (second light reflecting layer) are formed thereon, respectively.
- O was formed to a thickness of 100 nm to form an electrode 72, and an organic EL light emitting device was formed.
- This device emitted white light with an emission luminance of 100 cdZm 2 at a DC voltage of 5 V and an efficiency of 7 cdZA at a maximum emission luminance of 80,000 cdZm 2 .
- the organic EL element In the state where the organic EL element is not driven, when light having a wavelength of 400 to 800 nm is incident from the light translucent metal layer 71 (second light reflecting layer) side using a white light source by a halogen lamp, the reflected light is not reflected. In the spectrum, local minimum values were observed at 435 nm (half-width 25 nm), 510 nm (half-width 40 nm), and 650 nm (half-width 75 nm). The spectrum of the reflected light is measured with a spectrometer. It was.
- a glass plate with a blue color filter was superimposed on this device, and the luminescence characteristics were evaluated.
- a glass plate with a green color filter was overlaid, and the emission characteristics were evaluated.
- a glass plate with a red color filter was overlaid, and the luminescence characteristics were evaluated.
- the film thickness between the first and second light reflection layers (Ag) 61 and 71 was 470 nm.
- the organic EL device shown in FIG. 7b was produced as follows.
- Example 2 Production was performed in the same manner as in Example 1 except that the non-luminescent inorganic compound IZO (first transparent electrode) formed on Ag61 in Example 1 was omitted.
- the film thickness between the first and second light reflection layers (Ag) 61 and 71 was 310 nm.
- This device emitted white light with a luminance of 100 c and an efficiency of 7 cdZA at a DC voltage of 5 V and a maximum luminance of 80,000 cdZm 2 .
- Example 1 A glass plate with the same blue color filter as in Example 1 was overlaid on this device, and the light emission characteristics were evaluated.
- the organic EL device shown in FIG. 7c was produced as follows.
- each layer was performed in the same manner as in Example 1, but the order of film formation was changed, and Ag61 (first Next to the light reflecting layer), IZO (first transparent electrode), Alq: Li, Alq, Alq: DCJTB, DPVDP AN: B1, NPD: coumarin 6, NPD, HI, and lnm of molybdenum trioxide
- a film was formed (inorganic injection layer 73), and IZO was formed thereon to a thickness of 100 nm (second transparent electrode 62) to form a non-luminous inorganic compound layer.
- a 5 nm-thick Ag film was formed thereon.
- An organic EL device shown in FIG. 7d was prepared as follows.
- Example 2 SiON was not formed, and IZ062 (transparent electrode) and Ag71 (second light
- the film thickness between the first and second light reflecting layers (Ag) 61, 71 was 41 lnm.
- the organic EL device of the present invention includes various display devices (for example, consumer and industrial displays, specifically, various mono-color and full-color display devices such as mobile phones, PDAs, car navigation systems, monitors, and TVs), It can be used for various certifications (backlights, etc.).
- display devices for example, consumer and industrial displays, specifically, various mono-color and full-color display devices such as mobile phones, PDAs, car navigation systems, monitors, and TVs
- various certifications backlights, etc.
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- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05720006A EP1722606A4 (en) | 2004-03-05 | 2005-03-04 | ORGANIC ELECTROLUMINESCENCE ELEMENT AND DISPLAY |
| US10/591,605 US20070188084A1 (en) | 2004-03-05 | 2005-03-04 | Organic electroluminescence element and display |
| JP2006510732A JPWO2005086541A1 (ja) | 2004-03-05 | 2005-03-04 | 有機エレクトロルミネッセンス素子及び表示装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-062773 | 2004-03-05 | ||
| JP2004062773 | 2004-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005086541A1 true WO2005086541A1 (ja) | 2005-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/003734 Ceased WO2005086541A1 (ja) | 2004-03-05 | 2005-03-04 | 有機エレクトロルミネッセンス素子及び表示装置 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20070188084A1 (ja) |
| EP (1) | EP1722606A4 (ja) |
| JP (1) | JPWO2005086541A1 (ja) |
| KR (1) | KR20070011301A (ja) |
| CN (1) | CN100482026C (ja) |
| TW (1) | TW200601889A (ja) |
| WO (1) | WO2005086541A1 (ja) |
Cited By (4)
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|---|---|---|---|---|
| JP2008034288A (ja) * | 2006-07-31 | 2008-02-14 | Sony Corp | 有機発光素子および表示装置 |
| JP2010097711A (ja) * | 2008-10-14 | 2010-04-30 | Toppan Printing Co Ltd | El素子およびディスプレイ装置 |
| JP2011064994A (ja) * | 2009-09-18 | 2011-03-31 | Toyo Ink Mfg Co Ltd | 赤色着色組成物、カラーフィルタおよびカラー表示装置 |
| WO2016125347A1 (ja) * | 2015-02-03 | 2016-08-11 | ソニー株式会社 | 表示装置及び電子機器 |
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|---|---|---|---|---|
| JP4378366B2 (ja) * | 2005-08-04 | 2009-12-02 | キヤノン株式会社 | 発光素子アレイ |
| KR20070019495A (ko) * | 2005-08-12 | 2007-02-15 | 삼성에스디아이 주식회사 | 백색 유기 발광 소자 및 그의 제조방법 |
| JP5251239B2 (ja) * | 2008-05-08 | 2013-07-31 | セイコーエプソン株式会社 | 有機el装置、電子機器、有機el装置の製造方法 |
| JP5293120B2 (ja) * | 2008-11-28 | 2013-09-18 | 住友化学株式会社 | 有機エレクトロルミネッセンス素子およびその製造方法 |
| KR100999771B1 (ko) * | 2010-02-25 | 2010-12-08 | 엘지이노텍 주식회사 | 발광 소자, 발광 소자 제조방법 및 발광 소자 패키지 |
| US8604500B2 (en) * | 2010-03-17 | 2013-12-10 | Lg Innotek Co., Ltd. | Light emitting device and light emitting device package |
| US20110249450A1 (en) * | 2010-04-09 | 2011-10-13 | Ngai Peter Y Y | Oled luminaire having intensity shaping for oled light source |
| JP2012054225A (ja) * | 2010-08-04 | 2012-03-15 | Canon Inc | 表示装置 |
| KR102552276B1 (ko) | 2015-02-24 | 2023-07-07 | 삼성디스플레이 주식회사 | 유기 발광 표시 장치 및 그 제조 방법 |
| JP6600523B2 (ja) * | 2015-10-05 | 2019-10-30 | 株式会社Joled | 表示装置および電子機器 |
| US10186676B2 (en) * | 2017-03-13 | 2019-01-22 | Intel Corporation | Emissive devices for displays |
| CN107394049A (zh) * | 2017-07-06 | 2017-11-24 | 深圳市华星光电技术有限公司 | 一种白光oled器件 |
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- 2005-03-04 JP JP2006510732A patent/JPWO2005086541A1/ja not_active Withdrawn
- 2005-03-04 EP EP05720006A patent/EP1722606A4/en not_active Withdrawn
- 2005-03-04 US US10/591,605 patent/US20070188084A1/en not_active Abandoned
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008034288A (ja) * | 2006-07-31 | 2008-02-14 | Sony Corp | 有機発光素子および表示装置 |
| US9093664B2 (en) | 2006-07-31 | 2015-07-28 | Sony Corporation | Organic light emitting device and display unit |
| US9461274B2 (en) | 2006-07-31 | 2016-10-04 | Sony Corporation | Organic light emitting device and display unit |
| US9786869B2 (en) | 2006-07-31 | 2017-10-10 | Sony Corporation | Organic light emitting device and display unit |
| US9985250B2 (en) | 2006-07-31 | 2018-05-29 | Sony Corporation | Organic light emitting device and display unit |
| JP2010097711A (ja) * | 2008-10-14 | 2010-04-30 | Toppan Printing Co Ltd | El素子およびディスプレイ装置 |
| JP2011064994A (ja) * | 2009-09-18 | 2011-03-31 | Toyo Ink Mfg Co Ltd | 赤色着色組成物、カラーフィルタおよびカラー表示装置 |
| WO2016125347A1 (ja) * | 2015-02-03 | 2016-08-11 | ソニー株式会社 | 表示装置及び電子機器 |
| US10541275B2 (en) | 2015-02-03 | 2020-01-21 | Sony Corporation | Display device and electronic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200601889A (en) | 2006-01-01 |
| JPWO2005086541A1 (ja) | 2008-01-24 |
| CN1922931A (zh) | 2007-02-28 |
| US20070188084A1 (en) | 2007-08-16 |
| KR20070011301A (ko) | 2007-01-24 |
| CN100482026C (zh) | 2009-04-22 |
| EP1722606A4 (en) | 2008-08-20 |
| EP1722606A1 (en) | 2006-11-15 |
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