WO2007138906A1 - 有機エレクトロルミネッセンス素子及びフルカラー発光装置 - Google Patents
有機エレクトロルミネッセンス素子及びフルカラー発光装置 Download PDFInfo
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- WO2007138906A1 WO2007138906A1 PCT/JP2007/060345 JP2007060345W WO2007138906A1 WO 2007138906 A1 WO2007138906 A1 WO 2007138906A1 JP 2007060345 W JP2007060345 W JP 2007060345W WO 2007138906 A1 WO2007138906 A1 WO 2007138906A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
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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
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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]
- H10K50/19—Tandem OLEDs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2101/00—Properties of the organic materials covered by group H10K85/00
- H10K2101/30—Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values
Definitions
- the present invention relates to an organic electoluminescence device and a full-color light emitting device using the same.
- Patent Document 1 in the type in which the light emitting layer is divided into two, the light emitting color becomes red by making the light emitting layer on the anode side where the light emitting region of the light emitting layer is easily biased into a blue light emitting layer
- the tendency to be biased can be counteracted, and have proposed a white element that suppresses color changes.
- the luminous efficiency was not always at a sufficient level.
- Patent Document 2 discloses an organic EL element in which a light emitting layer is laminated in the order of a red light emitting layer, a blue light emitting layer, and a green light emitting layer from the anode side. Furthermore, a technique for suppressing a color change accompanying an increase in driving current by doping a red light emitting layer used in the red light emitting layer into the blue light emitting layer is also disclosed. However, the luminous efficiency was not always sufficient.
- Patent Document 3 discloses an organic EL device that emits white light by laminating an anode, a hole transporting blue light emitting layer, an electron transporting carrier recombination region control layer, an electron transporting red light emitting layer, and a cathode in this order. Yes.
- the driving voltage was high because the affinity level of the carrier recombination region control layer was larger than the affinity level of the hole transporting blue light emitting layer.
- Patent Document 4 discloses a white light-emitting organic EL device in which two electron-transporting light-emitting layers are arranged via a charge barrier layer. However, the holes injected from the anode are mostly consumed in the first light-emitting layer, and pass through the charge barrier layer and are supplied to the second electron-transporting light-emitting layer. Due to the small amount, the efficiency of white light emission is low.
- Patent Document 5 an anode, a first light emitting layer, a charge barrier layer, a second light emitting layer, and a cathode are stacked in this order, and the ion barrier potential of the charge barrier layer is set to the ion barrier of the first light emitting layer.
- a white light emitting organic EL device is disclosed in which the potential level of the charge barrier layer is set to 0. leV or more higher than the potential, and the affinity level of the second light emitting layer is set to 0. leV or less.
- the charge barrier layer has both functions of an electron barrier and a hole barrier, there is a problem that the drive voltage becomes high.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-272857
- Patent Document 2 JP-A-2004-235168
- Patent Document 3 JP-A-8-78163
- Patent Document 4 International Publication No. 2005Z099313 Pamphlet
- Patent Document 5 International Publication No. 2005Z112518 Pamphlet
- Patent Document 6 Japanese Unexamined Patent Application Publication No. 2005-100921
- Patent Document 7 US Publication No. 2006Z0088729
- the present invention has color rendering properties suitable for display and lighting applications, and emits light.
- the object is to provide an organic EL device with high efficiency and little change in chromaticity!
- the following organic EL element and full-color light-emitting device are provided.
- An anode, a first light emitting layer, a charge barrier layer, a second light emitting layer, and a cathode are laminated in this order, and the first light emitting layer and the second light emitting layer each contain a host material and a dopant, and 1 The energy gap force of the host material of the light emitting layer is smaller than the energy gap of the host material of the second light emitting layer,
- the host material of the first light emitting layer is a hole transporting material
- the host material of the second light emitting layer is an electron transporting material
- the affinity level force of the charge barrier layer is 0.2 eV or more smaller than the affinity level of the host material of the second light emitting layer
- Ion potential (Iel) of the charge barrier layer and ion potential (Ihl) 1S of the host material of the first light emitting layer 1S An organic electoluminescence device that satisfies the following relationship (1).
- It includes an anode, a first light emitting layer, a charge barrier layer, a second light emitting layer, a third light emitting layer, and a cathode stacked in this order,
- the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer contain a host material and a dopant, respectively;
- the energy gap force of the host material of the first light emitting layer is smaller than the energy gap of the host material of the second light emitting layer
- the host material of the first light emitting layer is a hole transporting material
- the host material of the second light emitting layer and the third light emitting layer is an electron transporting material, and the charge barrier layer is a hole transporting material,
- the ion barrier potential (Iel) of the charge barrier layer and the host material of the first light emitting layer On-potential (Ihl) force An organic electroluminescent device that satisfies the following relationship (1).
- the energy gap force of the host material of the first light-emitting layer 4.
- the organic electroreductive element according to any one of 1 to 3, which is 0.4 eV or more smaller than the energy gap of the host material of the second light-emitting layer.
- the organic electoluminescence device according to any one of 1 to 8, which has a hole transport layer adjacent to the first light emitting layer between the anode and the first light emitting layer.
- the first light-emitting layer or the first organic layer which is an organic layer close to the anode, has a force containing an oxidizing agent
- the second light-emitting layer or the second organic layer which is an organic layer close to Z or the cathode
- the organic electoluminescence device according to any one of 1 to 10, which contains a reducing agent.
- the host material of the first light emitting layer is a compound represented by the following formula (1), and the dopant of the first light emitting layer is a compound having a fluoranthene skeleton or a perylene skeleton 1 to: L 1
- the organic electoluminescence device according to any one of the above.
- X is a condensed aromatic ring group having 3 or more carbon rings
- Y is a group selected from a substituted or unsubstituted aryl group, a substituted or unsubstituted dialyl amino group, a substituted or unsubstituted aryl group or a substituted or unsubstituted alkyl group,
- n is an integer of 1 to 6, and when n is 2 or more, Y may be the same or different. )
- Ar 2 and Ar 3 are each a substituted or unsubstituted aromatic ring group or a substituted if Ku unsubstituted aromatic heterocyclic group, 1-8 each represent hydrogen, halogen, alkyl group, alkoxy group, alkylthio group , Alkenyl group, alkoxy group, alkenyl group, aromatic ring-containing alkyl group, aromatic ring-containing alkyloxy group, aromatic ring-containing alkylthio group, aromatic ring group, aromatic heterocyclic group, aromatic ring oxy group, Aromatic ring thio group, aromatic ring alkenyl group, alkenyl aromatic ring group, amino group, carbazolyl group, cyano group, hydroxyl group, -COOR 1 (R 1 'is hydrogen, alkyl group, alkenyl group, aromatic ring-containing alkyl group or Is an aromatic ring group), COR 2 ′ (R 2 ′ is hydrogen, an alkyl group, an alkenyl group, an al
- the organic electroluminescent device wherein the indenoperylene derivative is a dibenzotetrafluoro-perifuranthene derivative.
- the compound power represented by the formula (1) The organic electoluminescence device according to any one of 12 to 15, which is a naphthacene derivative represented by the following formula (4).
- ( ⁇ to 2 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 20 nuclear carbon atoms, amino Group, substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, substituted or unsubstituted alkylthio group having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy group having 6 to 20 nuclear carbon atoms, substituted or unsubstituted 6-20 aralkylthio group, substituted or unsubstituted alkenyl group having 2-20 carbon atoms, substituted or unsubstituted aralkyl group having 7-20 carbon atoms, or substituted or unsubstituted nuclear atoms 5-20 And these may be the same or different.
- Q 3 to Q 12 , Q 101 to Q 105 , Q 201 to Q 2 ° 5 each independently represents the same group as Q 3 to Q 12 in the general formula (1), These two, which may be the same or different, may be bonded to each other to form a ring.
- At least one of Q 1 (n , Q 105 , Q 201 and Q 2 ° 5 is an alkyl group, aryl group, amino group, alkoxy group, aryloxy group, 19.
- the organic electoluminescence device according to any one of 12 to 19, wherein the charge barrier layer comprises a tertiary amine compound, a force rubazole derivative, a compound containing a nitrogen-containing heterocyclic ring or a metal complex.
- a full-color light emitting device comprising a white-light-emitting organic electroluminescent device according to any one of 1 to 20 and a color filter.
- FIG. 1 is a diagram showing a configuration of an organic EL element according to Embodiment 1 of the present invention.
- 2 is a diagram showing energy levels of a first light emitting layer, a charge barrier layer, and a second light emitting layer of the organic EL element shown in FIG. 1.
- FIG. 3 is a diagram showing a configuration of an organic EL element according to Embodiment 2 of the present invention.
- FIG. 4 is a diagram showing a configuration of an organic EL element according to Embodiment 3 of the present invention.
- FIG. 5 is a diagram showing energy levels of the first light-emitting layer, the first charge barrier layer, and the second light-emitting layer created in Example 1.
- FIG. 6 is a diagram showing energy levels of the first light-emitting layer, the first charge barrier layer, and the second light-emitting layer prepared in Comparative Example 4.
- FIG. 7 is a diagram showing the energy levels of the first light-emitting layer, the first charge barrier layer, and the second light-emitting layer prepared in Comparative Example 5.
- FIG. 8 is a diagram showing the value of CIE1931 chromaticity X with respect to the luminance of the organic EL devices fabricated in Comparative Example 1 and Examples 1 to 4.
- FIG. 9 is a diagram showing the value of CIE1931 chromaticity y with respect to the luminance of the organic EL devices fabricated in Comparative Example 1 and Examples 1 to 4.
- the organic EL device includes an anode, a first light emitting layer, a charge barrier layer, a second light emitting layer, and a cathode laminated in this order.
- Each of the first light emitting layer and the second light emitting layer contains a host material and a dopant.
- the first light emitting layer includes a hole transporting material as a host material
- the second light emitting layer includes an electron transporting material as a host material.
- the energy gap of the host material of the first luminescent layer is smaller than the energy gap of the host material of the second luminescent layer! /.
- the affinity level force of the charge barrier layer The ion barrier potential (Iel) of the charge barrier layer, which is 0.2 eV or more smaller than the affinity level of the host material of the second light emitting layer, and the host material of the first light emitting layer. Ion potential (Ihl) force The following relationship (1) is satisfied.
- the affinity level (Afel) of the charge barrier layer is 0.2 eV or more smaller than the affinity level (Afh2) of the host material of the second light emitting layer, which is greater than leV! Meet ) o
- the ion barrier potential (Iel) of the charge barrier layer and the ionization potential (Ihl) force of the host material of the first light emitting layer satisfy the following equation.
- the energy gap (Eghl) of the host material of the first light-emitting layer is larger than 1.5 eV and smaller than the energy gap (Egh2) of the host material of the second light-emitting layer by 0.4 eV or more ( Fulfill).
- FIG. 1 is a diagram illustrating an example of the configuration of the organic EL element according to the first embodiment.
- the organic EL element 10 shown in FIG. 1 has a structure in which an anode hole transport layer 2, a first light emitting layer 3, a charge barrier layer 4, a second light emitting layer 5, an electron transport layer 6 and a cathode 7 are laminated. .
- the first light emitting layer 3 and the second light emitting layer 5 contain a host material and a dopant, respectively.
- white light emission can be obtained by making the first light emitting layer 3 emit red light and the second light emitting layer 5 emit blue light.
- the reason why the second light-emitting layer 5 is doped with a blue dopant is to make blue, which is generally weak in light emission, shine well and to balance white.
- the host material of the first light emitting layer 3 close to the anode 1 side is a hole transporting material
- the host material of the second light emitting layer 5 close to the cathode 7 is an electron transporting material.
- a charge barrier layer 4 is provided between the first light emitting layer 3 and the second light emitting layer 5.
- the second light emitting layer 5 is doped with a blue dopant, blue light emission can be obtained efficiently.
- Blue light emission is generally weak, but strong blue light emission can be obtained.
- the energy of blue light emitted from the second light-emitting layer 5 is also transferred to the red light of the first light-emitting layer 3 along with recombination of electrons injected through the charge barrier layer and holes from the anode side.
- the red light emission is also obtained by moving. Therefore, high efficiency and excellent color balance White luminescence is obtained.
- hole transportability in the present invention means that the hole mobility of the layer is larger than the electron mobility in the electric field range of 10 2 to 10 8 V / cm.
- the hole mobility of the first light emitting layer is 10 ⁇ 5 cm 2 ZV ⁇ sec or more.
- Electrode transportability means that the electron mobility of the layer is higher than the hole mobility in the electric field range of 10 2 to 10 8 V / cm.
- the electron mobility of the second light emitting layer is 10 -6 cm 2 ZV ⁇ sec or more.
- Hole or electron mobility is measured by the Time of flight method.
- the recombination region is biased to the second light emitting layer, and good white light emission is obtained. Hateful.
- the recombination region tends to be biased to the cathode side in the second light emitting layer. For this reason, the light emission efficiency is lowered by the quenching action of the metal cathode.
- the host material of the first light emitting layer is an electron transporting material and the host material of the second light emitting layer is a hole transporting material
- electrons are injected into the first light emitting layer and holes are injected into the second light emitting layer. Both injections are performed, resulting in a significant increase in drive voltage.
- the energy gap of blue is large! Therefore, the affinity level of the hole transporting blue light emitting layer is lowered.
- the electron transport carrier recombination region control layer has a generally high level of affinity. Therefore, the electron injection barrier from the electron transporting carrier recombination region control layer to the hole transporting blue light emitting layer is increased, and the driving voltage of the device is increased as a whole.
- the blue light-emitting layer is disposed on the cathode side of the charge barrier layer, so that the gap in the power level does not become too large and high voltage is prevented. Can do.
- the power level of the charge barrier layer 4 is 0.2 eV or more smaller than the power level of the host material of the second light emitting layer 5.
- the ionic potential (Iel) of the charge barrier layer 4 and the ionic potential (Ihl) force of the host material of the first light emitting layer 3 satisfy the following relationship (1).
- FIG. 2 shows the energy levels of the host material of the first light emitting layer 3, the charge barrier layer 4 and the second light emitting layer 5 of the organic EL element 10.
- the upper side shows the affinity level of each layer
- the lower side shows the ionization potential.
- the lower part shows a larger value.
- the difference between the ion potential and the affinity level corresponds to the energy gap.
- the power level of the charge barrier layer 4 is 0.2 eV or more smaller than the power level of the second light emitting layer 5. That is, in FIG. 2, the charge level of the charge barrier layer 4 is positioned 0.2 eV or more higher than that of the second light emitting layer 5 (in FIG. 2, ⁇ is 0.2 eV or more).
- the charge barrier layer 4 is a layer that restricts the injection of electrons from the second light-emitting layer 5 closer to the cathode 7 to the first light-emitting layer 3 closer to the anode 1. It is provided to control the recombination amount of the hole pair and adjust the light emission amount from each light emitting layer. Considering this function, it is necessary to have a power level that is 0.2 eV or more smaller than that of the host material of the second light emitting layer. Preferably it has a small power level of 0.5 eV or more.
- the relationship between the host material affinity level of the first light-emitting layer 3 and the charge barrier layer 4 affinity level is not particularly limited, but from the viewpoint of driving voltage, the affinity level force of the charge barrier layer 4 is not limited. It is preferable to be smaller than S ⁇ eV.
- the ionization potential (Iel) of the charge barrier layer 4 and the ion potential (Ihl) of the host material of the first light emitting layer 3 satisfy the above (1). This is because the increase of the drive voltage becomes a problem when the charge barrier layer 4 becomes a barrier against holes, thus preventing it. It is to do.
- the relationship between the ionic potential (Iel) of the charge barrier layer 4 and the ionic potential (Ihl) of the host material of the first light emitting layer 3 preferably satisfies the following formula (1 ′).
- the energy gap force of the host material of the first light emitting layer 3 is smaller than the energy gap of the host material of the second light emitting layer 5, preferably 0.4 eV or more. If the energy gap of the host material of the first luminescent layer 3 is larger or less than 0.4 eV, the difference in the affinity level between the second luminescent layer 5 and the charge barrier layer 4 becomes large. For this reason, the supply of electrons to the first light-emitting layer 3 becomes insufficient, and it may be difficult to obtain good white light emission.
- the energy gap of the host material of the first light emitting layer 3 is preferably 1.8 to 2.8 eV
- the energy gap of the host material of the second light emitting layer 5 is preferably 2.2 to 3.3 eV. That's right.
- the dopant of the first light emitting layer 3 is a red dopant and the dopant of the second light emitting layer 5 is a blue dopant
- the first light emitting layer 3 emits red light
- the second light emitting layer 5 emits blue light.
- satisfying the above requirements can provide well-balanced white light emission.
- blue is preferably located on the cathode side of the electron barrier layer.
- red is arranged on the anode side of the electron barrier layer.
- excitons are generated in the second light emitting layer (blue), which is the negative side of the electron barrier layer, and this blue shines well.
- the second light emitting layer has a wider energy gap than the first light emitting layer, the energy is transferred to the first light emitting layer side. As a result, the red color of the second light emitting layer also shines.
- element configuration of the present embodiment is not limited to FIG. 1, and may be, for example, the following configuration.
- the intervening layer is not limited as long as it can transport electrons and holes. When it is in the light extraction direction, it is preferably transparent.
- the organic EL device includes an anode, a first light emitting layer, a charge barrier layer, a second light emitting layer, a third light emitting layer, and a cathode laminated in this order.
- the host material of the first light emitting layer becomes the hole transporting material force
- the host materials of the second light emitting layer and the third light emitting layer become the electron transporting material.
- the energy gap of the host material of the first light emitting layer is smaller than the energy gap of the host material of the second light emitting layer! /.
- the charge barrier layer is hole transporting.
- the affinity leveler of the charge barrier layer is preferably 0.2 eV or more smaller than the affinity level of the host material of the second light emitting layer.
- the ionization potential (Iel) of the charge barrier layer and the ionization potential (Ihl) force of the host material of the first light-emitting layer satisfy the following relationship (1).
- FIG. 3 is a diagram illustrating an example of the configuration of the organic EL element according to the second embodiment.
- the organic EL device 20 shown in FIG. 3 is formed by laminating an anode hole transport layer 2, a first light emitting layer 3, a charge barrier layer 4, a second light emitting layer 5, a third light emitting layer 8, an electron transport layer 6 and a cathode 7.
- the third light emitting layer 8 also contains a host material and a dopant.
- the host material of the third light emitting layer 8 is Like the second light emitting layer 5, it is an electron transporting material.
- the first light emitting layer 3 has a first dopant as a red dopant
- the second light emitting layer 5 has a blue dopant
- the third light emitting layer 8 has a green dopant as a first dopant.
- the first light emitting layer 3, the charge barrier layer 4, and the second light emitting layer 5 do not necessarily have the relationship as in the first embodiment. This is because the amount of electrons injected into the first light emitting layer 3, the charge barrier layer 4, and the second light emitting layer 5 is limited by forming the third light emitting layer 8. In particular, since the third light emitting layer is doped with a green dopant, electrons are trapped by this green dopant, and electron injection into the second light emitting layer is controlled.
- the ionization potential, the power level, and the energy gap of the host material of the first light emitting layer 3, the charge barrier layer 4 and the host material of the second light emitting layer 5 are Preferred to have the same relationship as one.
- the element configuration of the present embodiment is not limited to FIG. 3.
- a configuration in which the third light emitting layer is formed on the element configuration 16 illustrated in the first embodiment may be used.
- a plurality of charge barrier layers may be stacked.
- the host material strength of the first light emitting layer is a compound represented by the following formula (1)
- the dopant of the first light emitting layer is a compound having a fluoranthene skeleton or a perylene skeleton.
- X is a condensed aromatic ring group having 3 or more carbon rings
- ⁇ is a group selected from a substituted or unsubstituted aryl group, a substituted or unsubstituted dialyl amino group, a substituted or unsubstituted aryl group or a substituted or unsubstituted alkyl group,
- the host material of the first light emitting layer has 4 or more condensed rings.
- the host material of the second light emitting layer has 3 or less condensed rings.
- the embodiment of the present invention has been described.
- the anode, the hole transporting first light emitting layer, the charge barrier layer, the electron transporting second light emitting layer, and the cathode are arranged in this order. It is constructed by laminating. With such a configuration, an organic EL device having color rendering properties, high luminous efficiency, and little chromaticity change can be obtained.
- the element of the present invention is characterized in that the chromaticity change of light emission is small even when the driving conditions (driving voltage, etc.) of the element are changed.
- the full-color light emitting device includes the organic EL element of the present invention that emits white light and a color filter.
- FIG. 4 is a diagram illustrating an example of the configuration of the full-color light emitting device according to the third embodiment.
- the full-color light emitting device 100 shown in FIG. 4 is provided with first, second, and third (white) organic EL elements 120, 130, and 140 force S on a support substrate 110, and the light of these elements 120, 130, and 140 is provided.
- First, second, and third (red, green, and blue) color filters 122, 132, and 142 are arranged on the extraction side (indicated by arrows) so as to face these elements 120, 130, and 140, respectively. .
- the color filters 122, 132, 142 are formed on the transparent substrate 150.
- the light emitted from the organic EL element 120 is converted to red light by the color filter 122 and extracted outside, and the light emitted from the organic EL element 130 is converted to green light by the color filter 132 and extracted to the outside.
- the light emitted from the element 140 is converted into blue light by the color filter 142 and extracted outside to obtain a full color.
- the organic EL element 120, 130, and 140 and the color finoletas 122, 132, and 142 the organic EL element is prevented from being deteriorated by oxygen, moisture, or other volatile components contained in the environment or the color filter.
- a sealing layer or the like may be provided. Specific examples include transparent inorganic compound layers such as SiOxNy, AlOxNy, and SiAlOxNy, and those laminated with these transparent inorganic compound layers and a transparent resin or sealing liquid.
- Examples of the color filters 122, 132, 142 include, for example, the following dyes only or those in a solid state in which the dyes are dissolved or dispersed in a binder resin.
- Red (R) dye Perylene pigment, lake pigment, azo pigment, etc.
- Green (G) dyes Halogen polysubstituted phthalocyanine pigments, halogen polysubstituted copper phthalocyanine pigments, trifelmethane basic dyes, etc.
- Blue (B) dye Copper phthalocyanine pigment, indanthrone pigment, indophenol pigment, cyanine pigment, etc.
- the binder resin is preferably a transparent material (visible light transmittance of 50% or more).
- transparent rosin (polymer) such as polymethylmetatalylate, polyatalylate, polycarbonate, polybulal alcohol, polyvinylpyrrolidone, hydroxyethyl cellulose, canoleboxymethinoresolerose, etc.
- photosensitive resin examples include photo-curing resist materials having a reactive vinyl group such as acrylic acid-based or methacrylic acid-based resins.
- printing ink (medium) using a transparent resin such as polyvinyl chloride resin, melamine resin, or phenol resin is selected.
- the color filter mainly has a coloring power
- it is formed by vacuum deposition or sputtering through a mask having a desired color filter pattern.
- the color filter is composed of a coloring material and a binder resin
- Oils and resists are mixed, dispersed or solubilized, formed into a film by a method such as spin coating, roll coating, or casting, and patterned with a desired color filter pattern by a photolithography method, or by a method such as printing. It is common to pattern with a desired color filter pattern.
- each of the color filters 122, 132, 142 are preferably as follows.
- R film thickness 0.5 to 5.0 111 (transmittance 50% or more 761011111),
- a black matrix when providing a full-color light emitting device that emits light of three primary colors of red, green, and blue, a black matrix can be used to improve the contrast ratio.
- charge barrier layer the first light emitting layer, and the second light emitting layer (third light emitting layer), which are characteristic parts of the organic EL device of the present invention, will be mainly described.
- organic layers inorganic compound layers, positive electrodes, cathodes, and the like and the manufacturing method, general configurations can be adopted. [0049] 1. Charge barrier layer
- the charge barrier layer is preferably at least 10 _5 cm 2 ZV ′ seconds or more when an electric field of hole mobility of 10 4 to 10 7 VZcm is applied from the viewpoint that it is difficult to become a barrier against holes.
- the thickness of the charge barrier layer is not particularly limited, but is preferably 0.1 to 50 nm. More preferably, the thickness is 0.1 to 20 nm.
- organic compounds and inorganic compounds can be used for the charge barrier layer.
- a tertiary amine compound, a force rubazole derivative, a compound containing a nitrogen-containing heterocyclic ring, a metal complex, or the like can be used.
- Inorganic compounds include Ba, Ca, Sr, Yb, Al, Ga, In, Li, Na, K, Cd, Mg, Si, Ta, Ge, Sb, Zn, Cs, Eu, Y, Ce, W, Zr , La, Sc, Rb, Lu, Ti, Cr, Ho, Cu, Er, Sm, W, Co, Se, Hf, Tm, Fe, Nb and other metal oxides, nitrides, complex oxides, Sulfides, fluorides, etc. can be used.
- the organic compounds described below that are usually used as a hole transport layer in an organic EL device are preferable.
- JP-A Stilbene derivatives
- JP-A 61-210363, 61-228451, 61-14642, 61-72255, 62-47646, 62-36674, 62-10652, 62-30255, 60-93455, 60-94462, 60-174749, 60-175052, etc.
- silazane derivatives US Pat. No. 4,950,950
- JP-A-2-204996 polysilane-based
- aniline-based copolymer JP-A-2-282263
- JP-A-1-211399 especially thiophene oligomer.
- a Borhuylin compound (disclosed in JP-A-63-29556965), an aromatic tertiary amine compound and a styrylamine compound (US Pat. No. 4,127,412) Kaisho 53-27033, 54-58445, 54-149634, 54-64299, 55-79450, 55-144250, 56-11913 2 61-295558, 61-98353, 63-295695, etc.) can also be used.
- Ar to A 4 are each independently a substituted or unsubstituted aryl group having 6 to 50 nuclear carbon atoms, and R 21 and R 22 are each independently a hydrogen atom, a substituted or unsubstituted nucleus.
- aryl group having 6 to 50 nuclear carbon atoms a phenyl, naphthyl, biphenyl, terphenyl, phenanthryl group and the like are preferable.
- the aryl group having 6 to 50 nuclear carbon atoms may be further substituted with a substituent.
- Preferred substituents include alkyl groups having 1 to 6 carbon atoms (methyl group, ethyl group, isopropyl group, n -Propyl group, s-butyl group, t-butyl group, pentyl group, hexyl group, cyclopentyl group, cyclohexyl group, etc.), and an amino group substituted with an aryl group having 6 to 50 carbon atoms.
- alkyl group having 1 to 50 carbon atoms examples include methyl group, ethyl group, isopropyl group, n-propyl group, sbutyl group, tbutyl group, pentyl group, hexyl group, cyclopentyl group, cyclohexyl group, and the like. Is preferred.
- a light emitting material may be added to the charge barrier layer.
- the dopant of the first light emitting layer 3 is a red dopant and the dopant of the second light emitting layer is blue.
- the light emitting material of the dopant and charge barrier layer is a green dopant. That is, light emission
- blue is the weakest, blue is placed in the most shining area, and with high visibility, green is placed in the next most shining area.
- red emits light by the power of charge injection energy transfer from blue and green, it may be at the position of the first light emitting layer.
- This arrangement can achieve a three-wavelength white color that is well balanced in efficiency and resists color shifts.
- dopants used in each light emitting layer described later can be used.
- the affinity level and ion potential of the charge barrier layer are the affinity level and ionization potential of the host material of the charge barrier layer.
- the first light emitting layer is preferably a yellow to orange or red light emitting layer.
- the yellow to orange or red light emitting layer is a light emitting layer having a maximum emission wavelength of 550 to 650 nm.
- the light emitting layer is preferably composed of a host material and a yellow to orange or red dopant.
- X is a condensed aromatic ring group having 3 or more carbon rings
- ⁇ is a group selected from a substituted or unsubstituted aryl group, a substituted or unsubstituted dialyl amino group, a substituted or unsubstituted aryl group or a substituted or unsubstituted alkyl group,
- ⁇ is an integer of 1 to 6, and when ⁇ is 2 or more, ⁇ may be the same or different.
- X It is a group containing one or more skeletons selected from dibenzopyrene, dibenzofluoranthene, and isanaphthylfluoranthene. More preferably, it contains a naphthacene skeleton or an anthracene skeleton.
- ⁇ is preferably an aryl group or diarylamino group having 12 to 60 carbon atoms, and more preferably. Or an aryl group having 12 to 20 carbon atoms or a diarylamino group having 12 to 40 carbon atoms.
- n is preferably 2.
- the compound represented by the formula (1) is a naphthacene derivative represented by the following formula (4).
- ( ⁇ to 2 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 nuclear carbon atoms.
- a compound in which at least one of 4 is an aryl group is an aryl group.
- the naphthacene derivative represented by the formula (4) is a compound represented by the following formula (5).
- Q 3 to Q 12 , Q 101 to Q 105 , Q 201 to Q 2 ° 5 each independently represents the same group as Q 3 to Q 12 in the general formula (1), These two, which may be the same or different, may be bonded to each other to form a ring.
- a fluorescent compound having at least one fluoranthene skeleton or perylene skeleton can be used, and examples thereof include compounds represented by the following formulas [2] to [18]. .
- X ⁇ X ⁇ is independently a hydrogen atom, a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a linear, branched or cyclic carbon.
- the compounds of the formulas [2] to [16] preferably contain an amino group or a alkenyl group.
- X 21 to X 24 are each independently an alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms.
- X 21 and X 22 and / or X 23 and X 24 may be bonded via a carbon-carbon bond or —O— or —S—.
- X 25 to X 36 are a hydrogen atom, a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a linear, branched or cyclic alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted group.
- An alkenyl group of 0, adjacent substituents and x 25 to x 36 may be bonded to form a cyclic structure
- At least one of the substituents X 25 to X 36 in each formula contains an amine or alkenyl group.
- Indenoperylene derivatives of the formulas [13] and [14] are preferred.
- the fluorescent compound having a fluoranthene skeleton preferably contains an electron donating group in order to obtain high efficiency and a long lifetime.
- the preferred electron donating group is a substituted or unsubstituted arylene amino group. It is.
- the fluorescent compound having a fluoranthene skeleton preferably has 5 or more condensed rings, and more preferably 6 or more. This is because the fluorescent compound exhibits a fluorescent peak wavelength of 540 to 70 Onm, and the light emission from the blue light emitting material and the fluorescent compound is superposed and white.
- the above-mentioned fluorescent compound is preferable because it has a plurality of fluoranthene skeletons, since the emission color is in a yellow to orange or red region.
- the indenoperylene derivative is a dibenzotetraphenyl perifuranthene derivative.
- the thickness of the first light emitting layer is preferably 1 to 50 nm, more preferably 5 to 50 nm. If it is less than lnm, the luminous efficiency may decrease, and if it exceeds 50 nm, the drive voltage may increase.
- the second light emitting layer is preferably a blue light emitting layer in view of the energy gap.
- the peak wavelength of blue light emission is 450 to 500 nm.
- dopants examples include arylene compounds and Z or styrylamine compounds, anthracene, naphthalene, phenanthrene, pyrene, tetracene, coronene, taricene, fluorescein, perylene, lidar perylene, and naphthaperylene.
- the second light emitting layer preferably contains an arylamine compound and Z or styrylamine compound.
- arylamine compounds include compounds represented by the following general formula (A), and examples of styrylamine compounds include compounds represented by the following general formula (B).
- Ar represents a fuel, a bifuel, a terpheal, a stilbene, a distil
- Ar and Ar are each a hydrogen atom or a carbon number.
- p is an integer from 1 to 4.
- Ar and Z or Ar are substituted with a styryl group.
- the aromatic group having 6 to 20 carbon atoms is preferably a phenyl group, a naphthyl group, an anthracyl group, a phenanthryl group, a terphenyl group, or the like.
- Ar to Ar are optionally substituted aryl groups having 5 to 40 nuclear carbon atoms. It is. q is an integer from 1 to 4. ]
- aryl groups having 5 to 40 nuclear atoms include phenyl, naphthyl, anthracenyl, phenanthryl, pyrenyl, coloninole, biphenyl, terphenyl, pyrrolyl, furanyl, thiophenyl, benzothiophenyl, oxadiazolyl, Preference is given to diphenylanthracenyl, indolyl, carbazolyl, pyridyl, benzoquinolyl, fluoranthenyl, isenaftfluoroolturyl, stilbene and the like.
- the aryl group having 5 to 40 nucleus atoms may be further substituted with a substituent.
- alkyl groups having 1 to 6 carbon atoms ethyl group, methyl group, isopropyl group, n —Propyl group, s-butyl group, t-butyl group, pentyl group, hexyl group, cyclopentyl group, cyclohexyl group, etc.
- alkoxy group having 1 to 6 carbon atoms ethoxy group, methoxy group, isopropoxy group, n— Propoxy group, s-butoxy group, t-butoxy group, pentoxy group, hexyloxy group, cyclopentoxy group, cyclohexyloxy group, etc.
- aryl group having 5-40 nuclear atoms aryl group having 5-40 nuclear atoms
- a compound having an anthracene center skeleton and a structure represented by the following formula (19) is preferable.
- a and A are each independently a substituted or unsubstituted aromatic group having 6 to 20 nuclear carbon atoms.
- R to R are each independently a hydrogen atom, substituted or absent.
- Substituted aryl group having 6 to 50 carbon atoms, substituted or unsubstituted hetero atom having 5 to 50 nuclear atoms Aryl group, substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, substituted or unsubstituted cycloalkyl group having 3 to 50 carbon atoms, substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, substituted or unsubstituted A aralkyl group having 6 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 5 to 50 carbon atoms, a substituted or unsubstituted aryl atom group having 5 to 50 carbon atoms, a substituted or unsubstituted carbon atom having 1 to 50 carbon atoms
- the group is a substituted or unsubstituted aryl group having 6 to 50 nuclear carbon atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 50 carbon atoms, a substituted or unsubstituted group.
- Arylthio group having 5 to 50 atoms, substituted or unsubstituted alkoxycarbonyl group having 1 to 50 carbon atoms, substituted or unsubstituted silyl group, carboxyl group, halogen atom, cyano group, nitro group and hydroxyl group Power is chosen.
- the adjacent substituents may be bonded to each other to form a saturated or unsaturated cyclic structure.
- a and A are preferably different from each other.
- Ar is a substituted or unsubstituted condensed aromatic group having 10 to 50 nuclear carbon atoms.
- Ar is a substituted or unsubstituted aromatic group having 6 to 50 nuclear carbon atoms.
- X 1 , X 2 and X 3 are each independently 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, substituted Or an unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 50 carbon atoms, a substituted or unsubstituted nuclear atom.
- a, b and c are each an integer of 0-4.
- a, when b and c is 2 or more, X 1 the mechanic, X 2 together, X 3 together may be the same or different.
- n is an integer of 1 to 3. When n is 2 or more, the values in [] may be the same or different. )
- Ar 1 and Ar 2 are each independently a substituted or unsubstituted aromatic ring group having 6 to 50 nuclear carbon atoms, and m and n are each an integer of 1 to 4)
- Ar and Ar are each a substituted or unsubstituted aromatic group having 6 to 50 nuclear carbon atoms.
- L and L are each a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthalene group, a substituted or unsubstituted fluorenylene group, or a substituted or unsubstituted dibenzosilolylene group.
- n is an integer from 1 to 4
- s is an integer from 0 to 2
- t is an integer from 0 to 4.
- L or Ar is bonded to any of the 1-5 positions of pyrene, and L or Ar, is bonded to any of the 6-10 positions of pyrene.
- substitution positions of L and L 'or Ar and Ar in pyrene are not the 1st and 6th positions or the 2nd and 7th positions.
- a 1 and 1 are each independently a substituted or unsubstituted condensed aromatic ring group having 10 to 20 nuclear carbon atoms.
- Ar 1 and Ar 2 are each independently a hydrogen atom or a substituted or unsubstituted aromatic ring group having 6 to 50 nuclear carbon atoms.
- ⁇ ! ⁇ Is independently a hydrogen atom, a substituted or unsubstituted aromatic ring 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 Is an unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group, Substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, substituted or unsubstituted aralkyl group having 6 to 50 carbon atoms, substituted or unsubstituted aryloxy group having 5 to 50 carbon atoms, substituted or unsubstituted nuclear atom An arylcarbothio group having 5 to 50 carbon atoms, a substituted or unsubstituted carbon group having 1 to 50 carbon atoms, a substituted or unsubstituted silyl
- Ar 2 , R 9 and R 10 may be plural or adjacent to each other to form a saturated or unsaturated cyclic structure.
- 1 ⁇ to 1 ⁇ 1 () are each independently a hydrogen atom, alkyl group, cycloalkyl group, optionally substituted aryl group, alkoxyl group, aryloxy group, alkylamino group, alkke group.
- A-group, an arylamino group or an optionally substituted heterocyclic group, a and b each represent an integer of 1 to 5, and when they are 2 or more, R 1 or R 2 are In each case, they may be the same or different, and R 1 or R 2 may be bonded to each other to form a ring, or R 3 and R 4 , R 5 and R 6 , R 7 And R 8 , R 9 and R 1C) may be bonded to each other to form a ring.
- L 1 represents a single bond, —O—, —S—, —N (R) — (R represents an alkyl group or an aryl group which may be substituted), an alkylene group or an arylene group. )
- R 11 to! ⁇ are each independently a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, an alkoxyl group, an aryloxy group, an alkylamino group, an arylamino group, or Cd, e and f each represent an integer of 1 to 5, and when they are 2 or more, R 11 , R 12 , R 16, or R 17 In each case, they may be the same or different, and R 11 , R 12 , R 16, or R 17 may combine to form a ring, or R 13 and R 14 , R 18 and R 19 may be bonded to each other to form a ring L 2 is a single bond, —O—, 1 S—, — N (R) — (R is an alkyl group or an optionally substituted aryl group. Represents an alkylene group or an arylene group.
- a 5 to A 8 each independently represents a substituted or unsubstituted biphenyl group or a substituted or unsubstituted naphthyl group.
- a 9 to A ′′ are each a single bond or a substituted or unsubstituted arylene group having 6 to 50 nuclear carbon atoms
- a 12 to A 14 are a hydrogen atom or a substituted or unsubstituted group, respectively.
- An aryl group having 6 to 50 nuclear carbon atoms R 21 to R 23 are each independently a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, or 1 to 6 carbon atoms.
- at least one of A 9 to A 14 is a group having three or more condensed aromatic rings.
- R and R are a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or
- R represents an unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted amino group, a cyano group or a halogen atom.
- R may be the same or different, and the same fluorene group
- R 1 2 may be the same or different.
- R 4 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and R bonded to different fluorene groups , R may be the same or different, the same
- R and R bonded to the fluorene group may be the same or different.
- Ar is a substituted or unsubstituted condensed polycyclic aromatic group having a total of 3 or more benzene rings.
- Ar and Ar may be the same or different.
- n an integer of 1 to 10.
- anthracene derivatives are preferable, monoanthracene derivatives are more preferable, and asymmetric anthracene is particularly preferable.
- the blue dopant is preferably at least one selected from a styrylamine, an amine-substituted styryl compound, and a fused aromatic ring-containing compound.
- the blue dopant is composed of a plurality of different compound forces.
- the styrylamine and amine-substituted styryl compound include a compound force represented by the following formula [20] or [21].
- the above condensed aromatic ring-containing compound may be represented by the following formula [22], for example. Compounds.
- Ar ⁇ Ar 32 and Ar 33 each independently represent a substituted or unsubstituted aromatic group having 6 to 40 carbon atoms, and p represents an integer of 1 to 3.
- at least one of Ar 31 , Ar 32 and Ar 33 contains a styryl group.
- Ar 41 and Ar 42 are each independently an arylene group having 6 to 30 carbon atoms
- E 1 and H 2 are each independently an aryl group or alkyl group having 6 to 30 carbon atoms
- It represents a hydrogen atom or a cyan group
- q represents an integer of 1 to 3.
- U and Z or V are substituents containing an amino group, and the amino group is preferably an aryl amino group.
- A is an alkyl group or alkoxy group having 1 to 16 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted alkylamino group having 6 to 30 carbon atoms, Alternatively, a substituted or unsubstituted arylamino group having 6 to 30 carbon atoms, B represents a condensed aromatic ring group having 10 to 40 carbon atoms, and r represents an integer of 1 to 4.
- the same arylamine compound and Z or styrylamine compound as the blue dopant described above can be used.
- the peak wavelength of green light emission is 500 to 550 nm.
- an aromatic amine compound represented by the formula (1) can be used as a green dopant.
- ⁇ to A 2 are each independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms (preferably 1 to 6 carbon atoms), a substituted or unsubstituted group.
- Group substituted or unsubstituted nuclear carbon group having 5 to 50 (preferably, nuclear carbon number 5 to 20) aryl group, substituted or unsubstituted carbon 1 to 10 (preferably 1 to 6 carbon atoms) ) Represents an alkylamino group or a halogen atom.
- Examples of the substituted or unsubstituted alkyl group of A to A 2 for example, a methyl group, Echiru group, a propyl group, an isopropyl group, butyl group, sec- butyl group, tert- butyl group, pentyl group, to Xyl group, heptyl group, octyl group, stearyl group, 2-phenylisopropyl group, trichloromethyl group, trifluoromethyl group, benzyl group, ⁇ -phenoxybenzyl group, a, ⁇ -dimethylenobenzenole group, Examples thereof include a, ⁇ -methinorefinenobenzylenole group, a, ⁇ -ditrifluoromethylbenzyl group, triphenylmethyl group, ⁇ - benzyloxybenzyl group and the like.
- Examples of the substituted or unsubstituted aryl group of A to A 2 include, for example, a phenyl group, a 2-methyl furol group, a 3-methyl furol group, a 4-methyl furol group, and a 4-ethyl furyl group.
- a phenyl group a 2-methyl furol group, a 3-methyl furol group, a 4-methyl furol group, and a 4-ethyl furyl group.
- Group, biphenyl group, 4-methylbiphenyl group, 4-ethyl biphenyl group, 4-cyclohexyl biphenyl group, terfel group, 3, 5-dichlorophenyl group, naphthyl group, 5- A methyl naphthyl group, an anthryl group, a pyrenyl group, etc. are mentioned.
- Examples of the substituted or unsubstituted cycloalkyl group of A to A 2 for example, cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, norbornel group, Adama pentyl group and the like.
- substituted or unsubstituted alkoxy group A to A 2 for example, a methoxy group, Etoki sheet group, propoxy group, isopropoxy group, butoxy group, isobutoxy group, sec- butoxy group
- Examples of the substituted or unsubstituted aryloxy group of A 1 to A 2 include a phenoxy group, a triloxy group, and a naphthyloxy group.
- the substituted or unsubstituted Ariruamino group Hache-eight for example, Jifue - Ruamino group, ditolylamino group, Jinafuchiruamino group, naphthylene Ruff enyl ⁇ amino group and the like.
- the substituted or unsubstituted alkylamino group Hache-eight 2 for example, Jimechiruamino group, Jechiruamino group, Kishiruamino group and the like to di.
- halogen atoms ⁇ to A 2 examples include a fluorine atom, a chlorine atom, and a bromine atom.
- both A 1 and A 2 are not hydrogen atoms.
- d and e are each an integer of 1 to 5, preferably 1 to 3.
- the plurality of AA 2 may be the same or different, and may be connected to each other to form a saturated or unsaturated ring.
- H is an integer of 1 to 9, preferably 1 to 3.
- R 11 represents a substituted or unsubstituted secondary or tertiary alkyl group having 3 to 10 carbon atoms, or a substituted or unsubstituted secondary or tertiary cycloalkyl group having 3 to 10 carbon atoms.
- Examples of the substituted or unsubstituted secondary or tertiary alkyl group having 3 to 10 carbon atoms of R 11 include isopropyl group, tert butyl group, sec butyl group, tert pentyl group, 1-methylbutyl group, 1 -Methylpentyl group, 1,1 'dimethylpentyl group, 1,1' dimethylpropyl group, 1-benzyl-2-phenyl ester, 1-methoxyethyl group, 1-phenyl-1-methylethyl group and the like.
- f is an integer of 1 to 9, and preferably 1 to 3.
- f is 2 or more, multiple R 11s may be the same or different!
- R 12 represents a hydrogen atom, a substituted or unsubstituted carbon group having 1 to: L0 alkyl group (preferably having 1 to 6 carbon atoms), a substituted or unsubstituted aryl group having 5 to 50 nuclear carbon atoms ( Preferably, a nuclear carbon number of 5 to: L0), a substituted or unsubstituted cycloalkyl group having a nuclear carbon number of 3 to 20 (preferably Is a substituted or unsubstituted carbon group having 1 to: LO alkoxy group (preferably 1 to 6 carbon atoms), a substituted or unsubstituted aryloxy group having 5 to 50 nuclear carbon atoms.
- L0 alkyl group preferably having 1 to 6 carbon atoms
- a substituted or unsubstituted aryl group having 5 to 50 nuclear carbon atoms Preferably, a nuclear carbon number of 5 to: L0
- substituted or unsubstituted arylamino group having 5 to 50 nuclear carbon atoms preferably 5 to 20 carbon atoms
- substituted or unsubstituted carbon having 1 to: L0 represents an alkylamino group (preferably having 1 to 6 carbon atoms) or a halogen atom.
- R 12 substituted or unsubstituted alkyl group, aryl group, cycloalkyl group, alkoxy group, aryloxy group, aryl amino group, alkylamino group and norogen atom are the same as those in Ai to A 2 above. Is mentioned.
- g is an integer of 0 to 8, preferably 0 to 2.
- the plurality of R 12 may be the same or different! /.
- f + g + h is an integer of 2-10, and it is preferable in it being 2-6.
- aromatic amine compound compounds represented by the formulas (1-1) to (1-7) are more preferable.
- the thickness of the second light emitting layer is preferably 1 to: LOOnm, more preferably 5 to 50 nm. If it is less than In m, it is difficult to form a light emitting layer, and it may be difficult to adjust the chromaticity, and if it exceeds lOOnm, the drive voltage may increase.
- the third light emitting layer is preferably a green light emitting layer in view of the energy gap.
- the peak wavelength of green light emission is 500 to 550 nm.
- the host material and dopant of the third light emitting layer those described above can be used. Host material is first
- the thickness of the third light-emitting layer is preferably 1 to 100 nm, more preferably 5 to 50 nm. If it is less than In m, it is difficult to form a light emitting layer, and it may be difficult to adjust the chromaticity. If it exceeds lOOnm, the drive voltage may increase.
- a hole injection layer, a hole transport layer, an organic semiconductor layer, or the like can be provided as the first organic layer between the anode and the first light emitting layer.
- the hole injection layer or the hole transport layer is a layer that assists hole injection into the light emitting layer and transports it to the light emitting region, and the ionization energy with high hole mobility is usually as small as 5.5 eV or less.
- the hole injection layer is provided to adjust the energy level, for example, to alleviate sudden changes in energy level.
- Such a hole injecting layer or hole transporting layer is preferably a material that transports holes to the light emitting layer with a lower electric field strength, and further has a hole mobility of, for example, 10 4 to: L0 6 V / cm of when an electric field is applied, at least 10_ 6 cm 2 ZV, ⁇ preferred are those which are second.
- the material for forming the hole injection layer or the hole transport layer is not particularly limited as long as it has the above-mentioned preferable properties. Conventionally, it has been commonly used as a charge transport material for holes over optical materials. It can be used by selecting any one of those known and used for the hole injection layer of the organic EL element.
- the material for forming such a hole injection layer or hole transport layer include, for example, a triazole derivative (see US Pat. No. 3,112,197, etc.), an oxadiazole derivative (US Pat. No. 3, 189, 447, etc.), imidazole derivatives (see Japanese Examined Patent Publication No. 37-1 6096, etc.), polyarylalkane derivatives (US Pat. Nos. 3,615,402, 3,820,989) No. 3,542,544, JP-B 45-555, 51-10983, JP-A 51-93224, 55-17105, 56-4148 55-108667, 55-156953, 56-3 6656, etc.), pyrazoline derivatives and pyrazolone derivatives (US Pat.
- a triazole derivative see US Pat. No. 3,112,197, etc.
- an oxadiazole derivative US Pat. No. 3, 189, 447, etc.
- imidazole derivatives see Japanese Examined Patent Publication No. 37-1
- JP-A-54-59143 55-52063, 55-52064, 55-46760, 55-85495, 57-11350, 57- 1487 No. 49 JP-A-2-311591 etc.
- stilbene derivatives JP-A-61-210363, 61-228451, 61-14642, 61-72255, 62- 47646, 62-36674, 62-10652, 62-30255, 60-93455, 60-94462, 60-1747 49, 60- No. 175052, etc.
- silazane derivatives US Pat. No.
- the above-mentioned materials can be used.
- Volfirin compound (disclosed in JP-A-63-29556965)
- aromatic tertiary Amine compounds and styrylamine compounds (US Pat. No. 4,127,412, JP-A 53-27033, 54-58445, 54-149634, 54-6 4299, 55-79450 publication, 55-144250 publication, 56-119132 publication, 61-295558 publication, 61-98353 publication, 63-295695 publication etc.)
- aromatic tertiary Amine compounds can also be used.
- the aromatic amine derivative represented by the following general formula (1) is desirable.
- L is a substituted or unsubstituted arylene group or heterocyclic group having 5 to 60 carbon atoms.
- Ar to Ar are substituted or unsubstituted, respectively, having 5 to 50 nuclear atoms.
- Ar to Ar are preferably the same substituent.
- Ar to Ar are preferably biphenyl groups or terphenyl groups, and more preferably.
- the compound represented by the general formula (1) includes Ar to Ar among substituents of Ar to Ar.
- Ar 7 10 8 10 are preferably the same substituent.
- Ar to Ar are preferably biphenyl groups.
- a terfel group, more preferably a biphenyl group, and Ar is preferably a biphenyl group, a terfel group, a phenanthrene group, a fluorene group, a 1-naphthyl group, a 2-naphthyl group, or A phenyl group, more preferably a biphenyl group, a terfel group, a 1-naphthyl group or a phenyl group. More preferably, Ar to Ar are biphenyl, and Ar is
- Ar to Ar are preferably biphenyl groups, ter
- R, R, R, R, R, R are substituted or unsubstituted alkyl groups, substituted or unsubstituted
- a substituted aryl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted heterocyclic group is shown.
- R, R, R, R, and R may be the same or different. Also
- R and R, R and R, R and R, or R and R, R and R, R and R may form a condensed ring.
- This hole injection layer or hole transport layer may be composed of one or more of the above-described materials, and what is a hole injection layer or hole transport layer? A hole injection layer or a hole transport layer made of another kind of compound may be laminated! / ⁇ .
- the thickness of the hole injection layer or the hole transport layer is not particularly limited, but is preferably 20 to 200 nm.
- the organic semiconductor layer is a layer that assists hole injection or electron injection into the light-emitting layer, and preferably has a conductivity of 10 " 10 SZcm or more.
- thiophene-containing oligomers may include conductive oligomers such as allylamin oligomers described in JP-A-8-193191, conductive dendrimers such as allylamamine dendrimers, and the like.
- the thickness of the layer is not particularly limited, but is preferably 10 to: L, OOOnm.
- An electron injection layer, an electron transport layer, or the like can be provided as the second organic layer between the cathode and the second light emitting layer.
- the electron injection layer or the electron transport layer is a layer that assists the injection of electrons into the light emitting layer and has a high electron mobility.
- the electron injection layer is provided to adjust the energy level, such as to alleviate sudden changes in energy level.
- 8-hydroxyquinoline or a metal complex of its derivative, an oxadiazole derivative, or a nitrogen-containing heterocyclic derivative is preferable.
- metal complexes of 8-hydroxyquinoline or its derivatives include metal chelate oxinoid compounds containing a chelate of oxine (generally 8-quinolinol or 8-hydroxyquinoline), for example, tris (8-quinolinol) aluminum.
- metal chelate oxinoid compounds containing a chelate of oxine generally 8-quinolinol or 8-hydroxyquinoline
- tris (8-quinolinol) aluminum for example, tris (8-quinolinol
- oxadiazole derivative the following formula [Chemical 30]
- Ar 50 , Ar 51 , Ar 52 , Ar 54 , Ar 55 and Ar 58 each represent an aryl group with or without a substituent
- Ar 5 ° and Ar 51 , Ar 52 and Ar 54 , Ar 55 and Ar 58 may be the same or different from each other
- Ar 53 , Ar 56 and Ar 57 each represent an arylene group having or not having a substituent
- Ar 56 and Ar 57 are identical to each other. However, they may be different from each other.
- Examples of aryl groups in these formulas include a phenyl group, a biphenyl group, an anthranyl group, a perylenyl group, and a pyrenyl group.
- Examples of the arylene group include a phenylene group, a naphthylene group, a biphenylene group, an anthrene group, a perylene group, and a pyrenylene group.
- Examples of the substituent for these include an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, and a cyan group.
- this electron transfer composite those having good thin film formability are preferably used. Specific examples of these electron transfer compounds include the following.
- the nitrogen-containing heterocyclic derivative is a metal complex including the structures shown in the following (a) to (c).
- X represents a carbon atom or a nitrogen atom.
- Z and Z each independently contain nitrogen.
- the nitrogen-containing heterocyclic derivative preferably has a nitrogen-containing aromatic polycyclic group such as a 5-membered ring or a 6-membered ring, and if it contains a plurality of nitrogen atoms, it is not adjacent to the! And an organic compound having a skeleton.
- a nitrogen-containing aromatic polycyclic group having a plurality of nitrogen atoms examples thereof include nitrogen-containing aromatic polycyclic organic compounds having a skeleton combining (a) and (b) or (a) and (c). It is done.
- examples of the nitrogen-containing heterocyclic derivative include the compounds shown in the following (d) to (g).
- R is an aryl group having 6 to 40 carbon atoms, a heteroaryl group having 3 to 40 carbon atoms, an alkyl group having 1 to 20 carbon atoms, or an alkoxy group having 1 to 20 carbon atoms, and n is 0 to An integer of 5 Yes, when n is an integer greater than or equal to 2, several R may mutually be same or different.
- a nitrogen-containing heterocyclic derivative represented by the following formula:
- HAr is a nitrogen-containing heterocycle having 3 to 40 carbon atoms which may have a substituent
- L may have a single bond or a substituent, and may have 6 to 40 carbon atoms.
- Ar 61 may be a divalent divalent 6 to 40 carbon atom that may have a substituent.
- Ar 62 may have a substituent, Ar 62 may have an aryl group or a substituent having 6 to 40 carbon atoms! /, May! /, 3 to 40 carbon atoms The heteroaryl group.
- HAr examples include the following groups.
- Examples of Ar bl include the following groups.
- R bl to R each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an aryloxy group having 6 to 40 carbon atoms, The aryl group having 6 to 40 carbon atoms or the heteroaryl group having 3 to 40 carbon atoms may have a substituent, and Ar 63 may each have a substituent. It is an aryl group having 6 to 40 carbon atoms or a heteroaryl group having 3 to 40 carbon atoms.
- R 61 to R 74 are all hydrogen atoms.
- each of R 81 to R 84 independently represents a hydrogen atom, a substituted or unsubstituted aliphatic group, a substituted or unsubstituted aliphatic cyclic group, or a substituted or unsubstituted carbocyclic aromatic ring group. And represents a substituted or unsubstituted heterocyclic group, and X 81 and X 82 each independently represents an oxygen atom, a sulfur atom or a dicyanomethylene group.
- R 91 , R 3, R 9d and R 94 are the same or different groups, and are aryl groups represented by the following formulae.
- R 95 , R 96 , R 97 , R 98 and R 99 are the same or different from each other, and a hydrogen atom or at least one of them is a saturated or unsaturated alkoxyl group, alkyl group, amino A group or an alkylamino group.
- the thickness of the electron injection layer or the electron transport layer is not particularly limited, but is preferably 1 to: L00 nm o
- the first light-emitting layer or the first organic layer which is the organic layer closest to the anode, preferably contains an oxidizing agent.
- Preferred oxidizing agents are electron withdrawing or electron acceptors.
- the electron withdrawing or electron acceptor is preferably an electron withdrawing substituent or electron.
- Examples of the electron-withdrawing substituent include halogen, CN—, carbo group, aryl group and the like.
- Lewis acids various quinone derivatives, dicyanquinodimethane derivatives, and salts formed with aromatic amines and Lewis acids.
- quinoid derivatives More preferred are quinoid derivatives, and compounds represented by the following formulas (la) to (li) can be mentioned. More preferred are compounds represented by (la) and (lb).
- R 1 to R 4 are each hydrogen, halogen, a fluoroalkyl group, a cyano group, an alkoxy group, an alkyl group, or an aryl group. Of these, hydrogen and cyano groups are preferred.
- ⁇ 17 is an electron withdrawing group, each independently, comprising any force structure of the following formula (j) ⁇ (P).
- the structure is (j), (k), or (1).
- R 49 to R 52 are each a hydrogen atom, a fluoroalkyl group, an alkyl group, an aryl group or a heterocyclic ring, and R 5 and R 51 may form a ring.
- yi Y 28 each independently represents —N ⁇ or —CH 2.
- fluoroalkyl group of ⁇ 1 to! ⁇ 48 a trifluoromethyl group or a pentafluoroethyl group is preferable.
- ⁇ ⁇ 1 48 alkoxy group a methoxy group, an ethoxy group, iso- propoxy group, tert - butoxy group are preferable.
- the alkyl group of ⁇ 1 ⁇ 48 is preferably a methyl group, an ethyl group, a propyl group, an iso-propyl group, a tert-butyl group, or a cyclohexyl group.
- X is preferably a substituent represented by the following formula.
- R 51 ′ and R 52 ′ are a methyl group, an ethyl group, a propyl group, and a tert-butyl group, respectively.
- quinoid derivative include the following compounds.
- the second light emitting layer or the second organic layer that is the organic layer closest to the cathode preferably contains a reducing agent.
- Preferred reducing agents are alkali metals, alkaline earth metals, alkali metal oxides, alkaline earth oxides, rare earth oxides, alkali metal halides, alkaline earth halides, rare earth halides, alkali metals. And a complex formed of an aromatic compound.
- Particularly preferred alkali metals are Cs, Li, Na and K.
- the hole transport layer (hole injection layer) is preferably formed using the same material as the charge barrier layer described above. This makes it possible to reduce the types of materials used for manufacturing organic EL elements, which is advantageous in terms of cost in industrial production.
- Table 1 shows the energy gap (Eg), ionization potential (Ip), and affinity level (Af) of the above compounds.
- the photoelectrons emitted were plotted against the energy of ultraviolet rays irradiated to the material (powder) in the power of 1Z2, and the threshold of the photoelectron emission energy was defined as the ion potential (Ip).
- the EL spectrum when a current density of 1 OmAZcm 2 was applied was measured with a spectral radiance meter CS 1 OOOA (manufactured by Koryo Minolta) to calculate the luminous efficiency (unit: cd / A).
- the EL spectrum when current density lOmAZcm 2 was applied was measured for CIE1931 chromaticity (x, y) with a spectral radiance meter CS 1000A (manufactured by Koyu Minolta).
- the EL spectrum when current density 1 OmAZcm 2 was applied was measured with a spectral radiance meter CS 1 OOOA (manufactured by Corminor Minolta) and calculated by the following formula.
- RH Eg: 2.4 eV
- RD RD
- a 20 nm-thick tris (8-quinolinol) aluminum film (Alq film) was formed as an electron transport layer.
- Alq film 8-quinolinol
- metal A1 was deposited by 150 nm to form a metal cathode to form an organic EL light emitting device.
- FIG. 5 shows the energy levels of the first light-emitting layer, the first charge barrier layer, and the second light-emitting layer prepared in Example 1. The characteristics of the obtained organic EL light emitting device were measured. The results are shown in Table 2.
- Example 1 an organic EL light emitting device was formed in the same manner as in Example 1 except that the first light emitting layer was formed and then the charge barrier layer was not formed.
- the obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 2 shows the measurement results.
- the thickness of the hole transport layer was set to 10 nm
- the thickness of the first light emitting layer was set to 40 nm
- the thickness of the electron transport layer was set to 30 nm
- the film formation of the second light emitting layer was omitted.
- an organic EL light emitting device was formed.
- the obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 2 shows the measurement results.
- Comparative Example 1 the thickness of the hole transport layer was 20 nm, the thickness of the second light emitting layer was 40 nm, and the film formation of the first light emitting layer was omitted. Formed.
- the obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 2 shows the measurement results.
- FIG. 6 shows the energy levels of the first light-emitting layer, the first charge barrier layer, and the second light-emitting layer prepared in Comparative Example 4. The obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 2 shows the measurement results.
- An EL light emitting device was formed.
- FIG. 7 shows the energy levels of the first light-emitting layer, the first charge barrier layer, and the second light-emitting layer prepared in Comparative Example 5.
- the obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 2 shows the measurement results.
- the thickness of the two light emitting layers is 4
- An organic EL light emitting device was formed in the same manner as in Example 1 except that Onm was used. The obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 2 shows the measurement results.
- An organic EL light emitting device was formed in the same manner as in Example 2 except that the thickness of the second light emitting layer and the third light emitting layer was 15 nm and 25 nm, respectively.
- the obtained organic EL light emitting device was measured in the same manner as in Example 1.
- Table 2 shows the measurement results.
- Example 1 the red light emission of Comparative Example 2 and the blue light emission of Comparative Example 3 were combined.
- Example 2 by adding a green light-emitting layer as the third light-emitting layer to Example 1, it was possible to obtain good white light emission with higher current efficiency and an equivalent external quantum yield.
- Example 3 by further doping the charge barrier layer with a green light emitting material as compared with Example 1, it was possible to obtain good white light emission with an equivalent external quantum yield.
- An organic EL device was produced in the same manner as in Example 1 except that the compositions of the first light emitting layer, the electron blocking layer, and the second light emitting layer were changed as shown in Table 3. That is, the cathode side of the charge barrier layer is a red light emitting layer.
- An amine hole transport material (GD) with an Af of about 3. leV was used as the charge barrier layer.
- the obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 3 shows the measurement results.
- An organic EL device was produced in the same manner as in Example 1 except that the compositions of the first light emitting layer and the second light emitting layer were changed as shown in Table 3. That is, as in Comparative Example 6, the cathode side of the charge barrier layer is a red light emitting layer. Here, the Af of the host of the first light emitting layer is made higher than the Af of the charge barrier layer.
- the obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 3 shows the measurement results.
- Eg of the second light emitting layer is larger than Eg of the first light emitting layer.
- An organic EL device was produced in the same manner as in Example 1 except that the compositions of the first light emitting layer, the electron blocking layer, and the second light emitting layer were changed as shown in Table 3. That is, the first light emitting layer was green and the second light emitting layer was blue.
- the charge barrier layer was doped with red (RD).
- the obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 3 shows the measurement results.
- An organic EL device was produced in the same manner as in Example 1 except that the compositions of the first light emitting layer, the electron blocking layer, and the second light emitting layer were changed as shown in Table 3. That is, the first light emitting layer was blue, the second light emitting layer was red, and the charge barrier layer was doped with green.
- the obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 3 shows the measurement results.
- Example 3 and Comparative Examples 8 and 9 in order to form a well-balanced three-wavelength white color, it is preferable to arrange blue, which emits less light, in the region where it is most recombined. Therefore, blue becomes the second light emitting layer. From the balance of the host material, red is placed in the first light emitting layer. This configuration provides a well-balanced white color.
- the charge barrier layer when the charge barrier layer is doped with green, green can be emitted by exciton energy generated in the interface region between the charge barrier layer and the second light emitting layer. Further, since the charge barrier layer constituting the recombination region is doped with green at the interface with the first and second light emitting layers, the green light emission is stabilized. Green, which is highly visible, can be easily seen by human eyes when the light emission balance is lost. Therefore, by arranging green at the position where the balance is most balanced, it is possible to make white with little color shift.
- An organic EL device was manufactured in the same manner as in Example 2 except that the compositions of the second light emitting layer and the third light emitting layer were changed as shown in Table 3.
- the obtained organic EL light emitting device was measured in the same manner as in Example 1. Table 3 shows the measurement results.
- the blue light emission near 460 nm was weak, and a suitable white light emission was not obtained. This is because the blue light emission is weakened because it is difficult to transfer energy to the blue light-emitting layer due to recombination near the charge barrier layer Z second light-emitting layer (green) interface and green light emission.
- Example 2 As can be seen from the comparison between Example 2 and Example 5, in Example 2, the recombination energy in the second light-emitting layer is transferred to the third light-emitting layer to emit green light in the third light-emitting layer. .
- the recombination energy in the second light-emitting layer is transferred to the third light-emitting layer to emit green light in the third light-emitting layer.
- the second embodiment since green is arranged on the cathode side with respect to blue, a non-lance of electron injection with respect to blue can be obtained. This is because the green dopant becomes an electron trap. As a result, a balanced white element configuration can be realized as a whole.
- 112mmX 143mm X I On a 1mm support substrate (OA2 glass: manufactured by Nippon Electric Glass Co., Ltd.) V259BK (manufactured by Nippon Steel Chemical Co., Ltd.) is spin coated as a material for Black Mato Tutus (BM), opening 68 m X 285 m After exposure to ultraviolet rays through a photomask that creates a grid pattern, develop with 2% aqueous sodium carbonate, and beta at 200 ° C to form a black matrix (thickness 1.5 m) pattern. Formed.
- OA2 glass manufactured by Nippon Electric Glass Co., Ltd.
- V259BK manufactured by Nippon Steel Chemical Co., Ltd.
- V259B manufactured by Nippon Steel Chemical Co., Ltd.
- V259B manufactured by Nippon Steel Chemical Co., Ltd.
- BM Aligned with BM, exposed to UV light, developed with 2% aqueous sodium carbonate solution, beta-treated at 200 ° C to form a blue color filter (thickness 1.5 m) pattern .
- V259G manufactured by Nippon Steel Chemical Co., Ltd.
- V259G manufactured by Nippon Steel Chemical Co., Ltd.
- red color filter As a material for the red color filter, CRY-S840B (manufactured by Fuji Film Arch) was spin-coated to obtain 320 rectangular patterns (100 ⁇ m line, 230 ⁇ m gap). Aligned with BM through a photomask, exposed to UV light, developed with 2% aqueous sodium carbonate, betaed at 200 ° C, and red color filter (between the blue color filter and green color filter ( A pattern with a film thickness of 1.5 m) was formed.
- an acrylic thermosetting resin (V259PH: manufactured by Nippon Steel Chemical Co., Ltd.) was spin-coated on the previous substrate as a flattening film, and beta-coated at 180 ° C. 5 m) was formed.
- ITO indium stannate
- a positive resist (HPR204: manufactured by Fuji Orin) is spin-coated on this substrate, and a cathode taking out part and a photomask that forms a striped pattern of 90 m line and 20 m gap are formed.
- a positive resist HPR204: manufactured by Fuji Orin
- a cathode taking out part and a photomask that forms a striped pattern of 90 m line and 20 m gap are formed.
- UV exposure and development of tetramethylammonium hydroxide The resist was developed with a solution and beta-treated at 130 ° C.
- the exposed ITO was etched with an ITO etchant.
- the resist was treated with a stripping solution mainly composed of ethanolamine (N303: manufactured by Nagase Sangyo), and ITO pattern (lower electrode) was placed on the blue color filter, green color filter, and red color filter. : Anode, number of lines 960).
- a negative resist (V259PA: manufactured by Nippon Steel Chemical Co., Ltd.) is spin-coated, exposed to ultraviolet rays through a photomask, and then developed with a developer of tetramethylammonium hydroxide. Developed. Next, beta was formed at 180 ° C., and an ITO opening covering the ITO edge was 70 m ⁇ 290 m) to form a lattice-patterned interlayer insulating film.
- a negative resist ZPN1100: manufactured by Nippon Zeon Co., Ltd.
- ZPN1100 manufactured by Nippon Zeon Co., Ltd.
- the negative resist was developed with a developer of tetramethylammonium hydroxide to form a second interlayer insulating film (partition) perpendicular to the ITO stripe.
- the substrate thus obtained was subjected to ultrasonic cleaning in pure water and isopropyl alcohol, dried by air blow, and then UV cleaned.
- the organic layer (from the hole injection layer to the electron injection layer) was mask-deposited in a range covering the color filter, and the cathode was further subjected to mask deposition so that it could be connected to the previously formed ITO extraction electrode.
- the cathode (upper electrode) was automatically separated by the partition walls previously formed on the substrate, and had a pattern (240 lines) intersecting the lower electrode.
- the organic EL device of the present invention can be used for various display devices, knocklights, full-color display devices using color filters, light sources for general illumination and special illumination.
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Abstract
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EP07743779A EP1933397A4 (en) | 2006-05-25 | 2007-05-21 | ORGANIC ELECTROLUMINESCENT DEVICE AND COLOR LIGHT EMITTING DEVICE |
JP2008517846A JP4134280B2 (ja) | 2006-05-25 | 2007-05-21 | 有機エレクトロルミネッセンス素子及びフルカラー発光装置 |
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US11/475,225 US20070275266A1 (en) | 2006-05-25 | 2006-06-27 | Organic electroluminescence device |
US11/475,225 | 2006-06-27 | ||
US11/475,081 | 2006-06-27 | ||
US11/475,081 US7768195B2 (en) | 2006-05-25 | 2006-06-27 | Organic electroluminescent device with improved luminous efficiency |
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JPS61210363A (ja) | 1985-03-15 | 1986-09-18 | Canon Inc | 電子写真感光体 |
JPS61228451A (ja) | 1985-04-03 | 1986-10-11 | Canon Inc | 電子写真感光体 |
JPS61295558A (ja) | 1985-06-24 | 1986-12-26 | ゼロツクス コ−ポレ−シヨン | アルコキシアミン電荷移送分子を含有する光導電性像形成部材 |
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JPS6230255A (ja) | 1985-07-31 | 1987-02-09 | Minolta Camera Co Ltd | 電子写真感光体 |
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JPH045555A (ja) | 1990-04-23 | 1992-01-09 | Yokogawa Electric Corp | 発光分光検出器 |
JPH04308688A (ja) | 1991-04-08 | 1992-10-30 | Pioneer Electron Corp | 有機エレクトロルミネッセンス素子 |
JPH0878163A (ja) | 1994-09-07 | 1996-03-22 | Kemipuro Kasei Kk | 有機エレクトロルミネッセンス素子およびその製法 |
JPH08193191A (ja) | 1995-01-19 | 1996-07-30 | Idemitsu Kosan Co Ltd | 有機電界発光素子及び有機薄膜 |
JPH093448A (ja) | 1995-06-23 | 1997-01-07 | Toyo Ink Mfg Co Ltd | 有機エレクトロルミネッセンス素子用電子輸送材料およびそれを用いた有機エレクトロルミネッセンス素子 |
JP2000173774A (ja) | 1998-12-09 | 2000-06-23 | Sony Corp | 有機電界発光素子 |
JP2003272857A (ja) | 2002-03-19 | 2003-09-26 | Idemitsu Kosan Co Ltd | 白色系有機エレクトロルミネッセンス素子 |
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JP2004235168A (ja) | 2004-05-20 | 2004-08-19 | Toyota Industries Corp | 有機エレクトロルミネッセンス素子 |
JP2005100921A (ja) | 2003-08-22 | 2005-04-14 | Sony Corp | 有機el素子および表示装置 |
JP2005150081A (ja) * | 2003-10-24 | 2005-06-09 | Pentax Corp | 白色有機エレクトロルミネセンス素子 |
JP2005276583A (ja) * | 2004-03-24 | 2005-10-06 | Idemitsu Kosan Co Ltd | 有機エレクトロルミネッセンス素子及び表示装置 |
WO2005099313A1 (ja) | 2004-04-02 | 2005-10-20 | Idemitsu Kosan Co., Ltd. | 電子障壁層を介して2つの発光層を有する有機エレクトロルミネッセンス素子 |
JP3716096B2 (ja) | 1998-04-02 | 2005-11-16 | 三菱重工業株式会社 | 微粉炭セパレータ装置 |
WO2005112518A1 (ja) | 2004-03-25 | 2005-11-24 | Idemitsu Kosan Co., Ltd. | 有機エレクトロルミネッセンス素子 |
US20060088729A1 (en) | 2004-10-25 | 2006-04-27 | Eastman Kodak Company | White organic light-emitting devices with improved performance |
JP3927577B2 (ja) | 1994-11-10 | 2007-06-13 | マイケルスン、ガーリー、ケィー | 電動骨鉗子 |
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