WO2020235955A1 - Nouveau composé et dispositif électroluminescent organique l'utilisant - Google Patents

Nouveau composé et dispositif électroluminescent organique l'utilisant Download PDF

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WO2020235955A1
WO2020235955A1 PCT/KR2020/006690 KR2020006690W WO2020235955A1 WO 2020235955 A1 WO2020235955 A1 WO 2020235955A1 KR 2020006690 W KR2020006690 W KR 2020006690W WO 2020235955 A1 WO2020235955 A1 WO 2020235955A1
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compound
group
layer
emitting device
substituted
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이정하
이동훈
장분재
서상덕
정민우
한수진
박슬찬
황성현
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LG Chem Ltd
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LG Chem Ltd
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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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
    • C07D409/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing three or more hetero rings
    • 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
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
    • H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
    • 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]
    • H10K50/17—Carrier injection layers
    • H10K50/171—Electron injection layers

Definitions

  • the present invention relates to a novel compound and an organic light emitting device using the same.
  • the organic light emission phenomenon refers to a phenomenon in which electrical energy is converted into light energy using an organic material.
  • An organic light-emitting device using the organic light-emitting phenomenon has a wide viewing angle, excellent contrast, and fast response time, and has excellent luminance, driving voltage, and response speed characteristics, and thus many studies are being conducted.
  • the organic light emitting device generally has a structure including an anode and a cathode, and an organic material layer between the anode and the cathode.
  • the organic material layer is often made of a multi-layered structure composed of different materials in order to increase the efficiency and stability of the organic light emitting device.For example, it may be formed of a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like.
  • a voltage is applied between the two electrodes
  • holes are injected from the anode and electrons from the cathode are injected into the organic material layer, and excitons are formed when the injected holes and electrons meet. It glows when it falls back to the ground.
  • Patent Document 0001 Korean Patent Publication No. 10-2013-073537
  • the present invention relates to an organic light-emitting device comprising the novel compound.
  • the present invention provides a compound represented by the following formula 1:
  • X 1 , X 2 , and X 3 are each independently N or CH, provided that at least one of X 1 , X 2 and X 3 is N,
  • L is a direct bond, a substituted or unsubstituted C 6-60 arylene, or a substituted or unsubstituted C 5-60 heteroarylene containing at least one hetero atom selected from the group consisting of N, O and S ,
  • Ra is substituted or unsubstituted C 6-60 aryl
  • Rb is any one selected from compounds represented by the following,
  • Each R 1 is independently hydrogen, deuterium, or substituted or unsubstituted C 6-60 aryl,
  • R 2 is substituted or unsubstituted C 6-60 aryl
  • p is an integer from 0 to 5
  • n is each independently an integer of 1 to 7,
  • n is an integer of 1 to 8.
  • the present invention is a first electrode; A second electrode provided to face the first electrode; And one or more organic material layers provided between the first electrode and the second electrode, wherein at least one of the organic material layers comprises the compound of the present invention.
  • the compound represented by Chemical Formula 1 may be used as a material for an organic material layer of an organic light-emitting device, and may improve efficiency, low driving voltage, and/or lifetime characteristics in the organic light-emitting device.
  • the compound represented by Formula 1 may be used as a hole injection, hole transport, hole injection and transport, light emission, electron transport, or electron injection material.
  • FIG. 1 shows an example of an organic light emitting device comprising a substrate 1, an anode 2, a light emitting layer 3, and a cathode 4.
  • FIG. 2 shows a substrate (1), an anode (2), a hole injection layer (5), a hole transport layer (6), an electron suppression layer (7), a light emitting layer (3), an electron transport layer (8), an electron injection layer (9). And an example of an organic light-emitting device including the cathode 4 is shown.
  • substituted or unsubstituted refers to deuterium (D); Halogen group; Nitrile group; Nitro group; Hydroxy group; Carbonyl group; Ester group; Imide group; Amino group; Phosphine oxide group; Alkoxy group; Aryloxy group; Alkyl thioxy group; Arylthioxy group; Alkyl sulfoxy group; Arylsulfoxy group; Silyl group; Boron group; Alkyl group; Cycloalkyl group; Alkenyl group; Aryl group; Aralkyl group; Aralkenyl group; Alkylaryl group; Alkylamine group; Aralkylamine group; Heteroarylamine group; Arylamine group; Arylphosphine group; Or it means a substituted or unsubstituted substituted or unsubstituted with one or more substituents selected from the group consisting of a heterocyclic group containing one or more of N, O and S atoms,
  • a substituent to which two or more substituents are connected may be a biphenyl group. That is, the biphenyl group may be an aryl group or may be interpreted as a substituent to which two phenyl groups are connected.
  • the number of carbon atoms of the carbonyl group is not particularly limited, but it is preferably 1 to 40 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.
  • the ester group may be substituted with an oxygen of the ester group with a straight chain, branched or cyclic alkyl group having 1 to 25 carbon atoms or an aryl group having 6 to 25 carbon atoms.
  • it may be a compound of the following structural formula, but is not limited thereto.
  • the number of carbon atoms of the imide group is not particularly limited, but it is preferably 1 to 25 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.
  • the silyl group is specifically trimethylsilyl group, triethylsilyl group, t-butyldimethylsilyl group, vinyldimethylsilyl group, propyldimethylsilyl group, triphenylsilyl group, diphenylsilyl group, phenylsilyl group, etc. However, it is not limited thereto.
  • the boron group specifically includes a trimethyl boron group, a triethyl boron group, a t-butyldimethyl boron group, a triphenyl boron group, and a phenyl boron group, but is not limited thereto.
  • examples of the halogen group include fluorine, chlorine, bromine or iodine.
  • the alkyl group may be a linear or branched chain, and the number of carbon atoms is not particularly limited, but is preferably 1 to 40. According to an exemplary embodiment, the alkyl group has 1 to 20 carbon atoms. According to another exemplary embodiment, the alkyl group has 1 to 10 carbon atoms. According to another exemplary embodiment, the alkyl group has 1 to 6 carbon atoms.
  • alkyl group examples include methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1-ethyl-butyl, pentyl, n -Pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl , n-heptyl, 1-methylhexyl, cyclopentylmethyl, cycloheptylmethyl, octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhex
  • the alkenyl group may be a linear or branched chain, and the number of carbon atoms is not particularly limited, but is preferably 2 to 40. According to an exemplary embodiment, the alkenyl group has 2 to 20 carbon atoms. According to another exemplary embodiment, the alkenyl group has 2 to 10 carbon atoms. According to another exemplary embodiment, the alkenyl group has 2 to 6 carbon atoms.
  • Specific examples include vinyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 3-methyl-1- Butenyl, 1,3-butadienyl, allyl, 1-phenylvinyl-1-yl, 2-phenylvinyl-1-yl, 2,2-diphenylvinyl-1-yl, 2-phenyl-2-( Naphthyl-1-yl)vinyl-1-yl, 2,2-bis(diphenyl-1-yl)vinyl-1-yl, stilbenyl group, styrenyl group, and the like, but are not limited thereto.
  • the cycloalkyl group is not particularly limited, but is preferably 3 to 60 carbon atoms, and according to an exemplary embodiment, the cycloalkyl group has 3 to 30 carbon atoms. According to another exemplary embodiment, the cycloalkyl group has 3 to 20 carbon atoms. According to another exemplary embodiment, the cycloalkyl group has 3 to 6 carbon atoms.
  • the aryl group is not particularly limited, but is preferably 6 to 60 carbon atoms, and may be a monocyclic aryl group or a polycyclic aryl group. According to an exemplary embodiment, the aryl group has 6 to 30 carbon atoms. According to an exemplary embodiment, the aryl group has 6 to 20 carbon atoms.
  • the aryl group may be a phenyl group, a biphenyl group, or a terphenyl group, but the monocyclic aryl group is not limited thereto.
  • the polycyclic aryl group may be a naphthyl group, an anthracenyl group, a phenanthryl group, a pyrenyl group, a perylenyl group, a chrysenyl group, a fluorenyl group, and the like, but is not limited thereto.
  • the fluorenyl group may be substituted, and two substituents may be bonded to each other to form a spiro structure.
  • Etc When the fluorenyl group is substituted, Etc.
  • Etc it is not limited thereto.
  • the heterocyclic group is a heterocyclic group including at least one of O, N, Si and S as a heterogeneous element, and the number of carbons is not particularly limited, but it is preferably 2 to 60 carbon atoms.
  • the heterocyclic group include thiophene group, furan group, pyrrole group, imidazole group, thiazole group, oxazole group, oxadiazole group, triazole group, pyridyl group, bipyridyl group, pyrimidyl group, triazine group, acridyl group , Pyridazine group, pyrazinyl group, quinolinyl group, quinazoline group, quinoxalinyl group, phthalazinyl group, pyrido pyrimidinyl group, pyrido pyrazinyl group, pyrazino pyrazinyl group, isoquinoline group, indole group , Car
  • the aryl group among the aralkyl group, aralkenyl group, alkylaryl group, and arylamine group is the same as the example of the aryl group described above.
  • the alkyl group among the aralkyl group, the alkylaryl group and the alkylamine group is the same as the example of the aforementioned alkyl group.
  • the description of the aforementioned heterocyclic group may be applied.
  • the alkenyl group of the aralkenyl group is the same as the example of the alkenyl group described above.
  • the description of the aryl group described above may be applied except that the arylene is a divalent group.
  • the description of the aforementioned heterocyclic group may be applied except that the heteroarylene is a divalent group.
  • the hydrocarbon ring is not a monovalent group, and the description of the aryl group or the cycloalkyl group described above may be applied except that the hydrocarbon ring is formed by bonding of two substituents.
  • the heterocycle is not a monovalent group, and the description of the above-described heterocyclic group may be applied, except that two substituents are bonded to each other.
  • the present invention provides a compound represented by Formula 1:
  • an aryl group (Ra) is substituted at position 2 of the dibenzothiophene core, and a triazine-based substituent at position 6 ( ) Is substituted, and all carbons of C 1 , C 3 , C 4 , C 7 , C 8 , C 9 , which are other positions of the core, are replaced with hydrogen.
  • D means deuterium
  • X 1 , X 2 , and X 3 are each independently N or CH, provided that at least one of X 1 , X 2 and X 3 is N,
  • L is a direct bond, a substituted or unsubstituted C 6-60 arylene, or a substituted or unsubstituted C 5-60 heteroarylene containing at least one hetero atom selected from the group consisting of N, O and S ,
  • Ra is substituted or unsubstituted C 6-60 aryl
  • Rb is any one selected from compounds represented by the following,
  • Each R 1 is independently hydrogen, deuterium, or substituted or unsubstituted C 6-60 aryl,
  • R 2 is substituted or unsubstituted C 6-60 aryl
  • p is an integer from 0 to 5
  • n is each independently an integer of 1 to 7,
  • n is an integer of 1 to 8.
  • L is a direct bond, or phenylene.
  • Ra is phenyl, biphenylyl, terphenylyl, dimethylfluorenyl, naphthyl, phenanthrenyl or triphenylenyl, which are unsubstituted or substituted with one or more deuterium.
  • deuterium when deuterium is further substituted at the terminal, lifespan characteristics are improved when applied to an organic light emitting device, which is preferable.
  • each R 1 is independently hydrogen, deuterium, or phenyl unsubstituted or substituted with one or more deuterium.
  • deuterium when deuterium is further substituted at the terminal, lifespan characteristics are improved when applied to an organic light emitting device, which is preferable.
  • R 2 is phenyl
  • n is an integer from 1 to 6.
  • n is an integer from 1 to 6.
  • the compound represented by Formula 1 may be any one selected from the group consisting of:
  • the compound represented by Formula 1 according to the present invention is a compound containing an aryl group at position 2 and a triazine substituent at position 6 of dibenzothiophene.
  • the triazine substituent group is dibenzofuran and dibenzothiophene.
  • an additional substituent of any one of, carbazole electron injection and electron transfer speed can be improved, and accordingly, the organic light emitting device employing the compound of the present invention exhibits high efficiency, low driving voltage, and high luminance. , It has excellent long life characteristics.
  • the triazine-based substituent is dibenzofuran or dibenzothiophene, it is possible to remarkably improve the lifespan characteristics even if no additional substituent is included.
  • the compound represented by Formula 1 can be prepared through the following Scheme A.
  • Z 1 and Z 2 are each independently halogen, preferably chloro or bromo.
  • Reaction Scheme A the reactants, catalysts, solvents, and the like to be used can be changed to suit the desired product.
  • the method for preparing the compound of Formula 1 may be more specific in Preparation Examples to be described later.
  • the present invention provides an organic light-emitting device including the compound represented by Chemical Formula 1.
  • the present invention provides a first electrode; A second electrode provided to face the first electrode; And one or more organic material layers provided between the first electrode and the second electrode, wherein at least one of the organic material layers includes a compound represented by Formula 1 do.
  • the organic material layer of the organic light emitting device of the present invention may have a single-layer structure, but may have a multilayer structure in which two or more organic material layers are stacked.
  • the organic light-emitting device of the present invention may have a structure including a hole injection layer, a hole transport layer, an electron suppression layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like as an organic material layer.
  • the structure of the organic light emitting device is not limited thereto and may include a smaller number of organic layers.
  • the organic material layer may include a hole injection layer, a hole transport layer, or a layer that simultaneously injects and transports holes, and the hole injection layer, a hole transport layer, or a layer that simultaneously injects and transports holes is represented by Formula 1 above. Including the indicated compound.
  • the organic material layer may include an electron suppressing layer, and the electron suppressing layer includes the compound represented by Formula 1 above.
  • the organic material layer may include an emission layer, and the emission layer includes the compound represented by Chemical Formula 1.
  • the compound represented by Formula 1 may be included as a host of the emission layer.
  • the emission layer may further include a dopant compound.
  • the organic material layer may include an electron transport layer, an electron injection layer, or a layer for simultaneous electron transport and electron injection
  • the electron transport layer, an electron injection layer, or a layer for simultaneous electron transport and electron injection is represented by the formula It includes the compound represented by 1.
  • the organic light emitting device according to the present invention may be an organic light emitting device having a structure (normal type) in which an anode, one or more organic material layers, and a cathode are sequentially stacked on a substrate.
  • the organic light emitting device according to the present invention may be an inverted type organic light emitting device in which a cathode, one or more organic material layers, and an anode are sequentially stacked on a substrate.
  • FIGS. 1 and 2 the structure of an organic light-emitting device according to an embodiment of the present invention is illustrated in FIGS. 1 and 2.
  • FIG. 1 shows an example of an organic light emitting device comprising a substrate 1, an anode 2, a light emitting layer 3, and a cathode 4.
  • the compound represented by Formula 1 may be included in the emission layer.
  • the compound represented by Formula 1 may be included in one or more of the hole injection layer, the hole transport layer, the electron suppression layer, the light-emitting layer, the electron transport layer, and the electron injection layer.
  • the organic light-emitting device according to the present invention may be manufactured by materials and methods known in the art, except that at least one of the organic material layers includes the compound represented by Chemical Formula 1.
  • the organic material layers may be formed of the same material or different materials.
  • the organic light emitting device may be manufactured by sequentially stacking a first electrode, an organic material layer, and a second electrode on a substrate.
  • a PVD (physical vapor deposition) method such as sputtering or e-beam evaporation
  • the anode is formed by depositing a metal or a conductive metal oxide or an alloy thereof on the substrate.
  • an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer and an electron transport layer thereon it can be prepared by depositing a material that can be used as a cathode thereon.
  • an organic light-emitting device may be manufactured by sequentially depositing a cathode material, an organic material layer, and an anode material on a substrate.
  • the compound represented by Formula 1 may be formed as an organic material layer by a solution coating method as well as a vacuum deposition method when manufacturing an organic light emitting device.
  • the solution coating method refers to spin coating, dip coating, doctor blading, inkjet printing, screen printing, spray method, roll coating, and the like, but is not limited thereto.
  • an organic light-emitting device may be manufactured by sequentially depositing an organic material layer and an anode material from a cathode material on a substrate (WO 2003/012890).
  • the manufacturing method is not limited thereto.
  • the first electrode is an anode
  • the second electrode is a cathode
  • the first electrode is a cathode
  • the second electrode is an anode
  • the cathode material a material having a large work function is preferable so that holes can be smoothly injected into the organic material layer.
  • the cathode material include metals such as vanadium, chromium, copper, zinc, and gold, or alloys thereof; Metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), and indium zinc oxide (IZO); Combinations of metals and oxides such as ZnO:Al or SNO 2 :Sb; Poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDOT), conductive polymers such as polypyrrole and polyaniline, and the like, but are not limited thereto.
  • the cathode material is a material having a small work function to facilitate electron injection into the organic material layer.
  • the negative electrode material include metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, and lead, or alloys thereof; There are multi-layered materials such as LiF/Al or LiO 2 /Al, but are not limited thereto.
  • the hole injection layer is a layer that injects holes from an electrode, and has the ability to transport holes as a hole injection material, so that it has a hole injection effect at the anode, an excellent hole injection effect for a light emitting layer or a light emitting material.
  • a compound that prevents the movement of excitons to the electron injection layer or the electron injection material and has excellent ability to form a thin film is preferable.
  • the HOMO (highest occupied molecular orbital) of the hole injection material is between the work function of the positive electrode material and the HOMO of the surrounding organic material layer.
  • hole injection materials include metal porphyrin, oligothiophene, arylamine-based organic substances, hexanitrile hexaazatriphenylene-based organic substances, quinacridone-based organic substances, and perylene-based organic substances.
  • the hole transport layer is a layer that receives holes from the hole injection layer and transports holes to the light emitting layer.
  • a hole transport material a material capable of transporting holes from the anode or the hole injection layer to the light emitting layer and having high mobility for holes This is suitable.
  • Specific examples include an arylamine-based organic material, a conductive polymer, and a block copolymer including a conjugated portion and a non-conjugated portion, but are not limited thereto.
  • the electron-suppression layer is a layer between the hole-transport layer and the light-emitting layer in order to prevent electrons injected from the cathode from passing over to the hole-transport layer without being recombined in the light-emitting layer, and is also called an electron-blocking layer.
  • the electron-suppressing layer is preferably a material having less electron affinity than the electron transport layer.
  • the light-emitting material a material capable of emitting light in a visible region by transporting and combining holes and electrons from the hole transport layer and the electron transport layer, respectively, and a material having good quantum efficiency against fluorescence or phosphorescence is preferable.
  • the emission layer may include a host material and a dopant material.
  • Host materials include condensed aromatic ring derivatives or heterocyclic-containing compounds.
  • condensed aromatic ring derivatives include anthracene derivatives, pyrene derivatives, naphthalene derivatives, pentacene derivatives, phenanthrene compounds, and fluoranthene compounds
  • heterocycle-containing compounds include carbazole derivatives, dibenzofuran derivatives, ladder type Furan compounds, pyrimidine derivatives, and the like, but are not limited thereto.
  • Dopant materials include aromatic amine derivatives, strylamine compounds, boron complexes, fluoranthene compounds, and metal complexes.
  • the aromatic amine derivative is a condensed aromatic ring derivative having a substituted or unsubstituted arylamino group, and includes pyrene, anthracene, chrysene, and periflanthene having an arylamino group
  • the styrylamine compound is substituted or unsubstituted
  • the aromatic amine derivative is a condensed aromatic ring derivative having a substituted or unsubstituted arylamino group, and includes pyrene, anthracene, chrysene, and periflanthene having an arylamino group
  • the styrylamine compound is substituted or unsubstituted
  • at least one arylvinyl group is substituted on the arylamine, one or two or more substituents selected from the group consisting
  • the metal complex includes an iridium complex, a platinum complex, and the like, but is not limited thereto.
  • the electron transport layer is a layer that receives electrons from the electron injection layer and transports electrons to the emission layer.
  • an electron transport material a material capable of receiving electrons from the cathode and transferring them to the emission layer is suitable. Do. Specific examples include Al complex of 8-hydroxyquinoline; Complexes containing Alq 3 ; Organic radical compounds; Hydroxyflavone-metal complexes and the like, but are not limited thereto.
  • the electron transport layer can be used with any desired cathode material as used according to the prior art.
  • suitable cathode materials are conventional materials that have a low work function and are followed by an aluminum layer or a silver layer. Specifically, they are cesium, barium, calcium, ytterbium, and samarium, and in each case an aluminum layer or a silver layer follows.
  • the electron injection layer is a layer that injects electrons from the electrode, has the ability to transport electrons, has an electron injection effect from the cathode, an excellent electron injection effect on the light emitting layer or the light emitting material, and hole injection of excitons generated in the light emitting layer A compound that prevents migration to the layer and has excellent thin film formation ability is preferable.
  • fluorenone anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, preorenylidene methane, anthrone, and their derivatives, metals Complex compounds and nitrogen-containing 5-membered ring derivatives, but are not limited thereto.
  • the metal complex compound examples include lithium 8-hydroxyquinolinato, bis(8-hydroxyquinolinato)zinc, bis(8-hydroxyquinolinato)copper, bis(8-hydroxyquinolinato)manganese, Tris(8-hydroxyquinolinato)aluminum, tris(2-methyl-8-hydroxyquinolinato)aluminum, tris(8-hydroxyquinolinato)gallium, bis(10-hydroxybenzo[h] Quinolinato)beryllium, bis(10-hydroxybenzo[h]quinolinato)zinc, bis(2-methyl-8-quinolinato)chlorogallium, bis(2-methyl-8-quinolinato)( o-cresolato)gallium, bis(2-methyl-8-quinolinato)(1-naphtholato)aluminum, bis(2-methyl-8-quinolinato)(2-naphtholato)gallium, etc. It is not limited to this.
  • the organic light emitting device may be a top emission type, a bottom emission type, or a double-sided emission type depending on the material used.
  • the compound represented by Formula 1 may be included in an organic solar cell or an organic transistor in addition to the organic light emitting device.
  • a glass substrate coated with a thin film of ITO (indium tin oxide) to a thickness of 1,300 ⁇ was placed in distilled water dissolved in a detergent and washed with ultrasonic waves.
  • ITO indium tin oxide
  • a product made by Fischer Co. was used as a detergent
  • distilled water secondarily filtered with a filter made by Millipore Co. was used as distilled water.
  • ultrasonic washing was performed with a solvent of isopropyl alcohol, acetone, and methanol, dried, and then transported to a plasma cleaner.
  • the substrate was transported to a vacuum evaporator.
  • the following hexanitrile hexaazatriphenylene (HAT) compound was thermally vacuum deposited to a thickness of 500 ⁇ to form a hole injection layer.
  • the HT-1 compound was thermally vacuum deposited to a thickness of 800 ⁇ on the hole injection layer, and the HT-2 compound was sequentially vacuum deposited to a thickness of 500 ⁇ to form a hole transport layer.
  • compound 1 prepared as a host, the following H1 compound, and a phosphorescent dopant GD were co-deposited at a weight ratio of 47:47:6 to form a light emitting layer having a thickness of 350 ⁇ .
  • a hole blocking layer is formed by vacuum depositing an ET-1 material to a thickness of 50 ⁇ on the emission layer, and 250 ⁇ electrons by vacuum depositing an ET-2 material and LiQ (Lithium Quinolate) on the hole blocking layer at a weight ratio of 1:1 A transport layer was formed.
  • Lithium pyride (LiF) having a thickness of 10 ⁇ was sequentially deposited on the electron transport layer, and aluminum was deposited thereon to a thickness of 1000 ⁇ to form a negative electrode.
  • the deposition rate of the organic material was maintained at 0.4 ⁇ 0.7 ⁇ /sec
  • the deposition rate of lithium fluoride at the cathode was 0.3 ⁇ /sec
  • the deposition rate of aluminum was 2 ⁇ /sec
  • the vacuum degree during deposition was 1 ⁇ 10. -7 ⁇ 5 ⁇ 10 -8 torr was maintained.
  • Organic light-emitting devices of Examples 2 to 18 were fabricated in the same manner as in Example 1, except that the emission layer was formed as a host instead of Compound 1 as shown in Table 1 below.
  • T95 refers to the time it takes for the luminance to decrease to 95% from the initial luminance.
  • the organic light-emitting device manufactured by using the compound according to the present invention as a host of the light-emitting layer exhibits superior performance in terms of efficiency and lifetime compared to the organic light-emitting device of Comparative Example.
  • the organic light-emitting device has a high efficiency characteristic by 10% increase compared to Comparative Experimental Example 1 using compound C1, which is a phosphorescent host material that is commonly used, and has a lifespan of about 10-43%. As it increased, it could be confirmed that it is a compound having long life characteristics.
  • the device characteristics are significantly different depending on the type of the triazine-based substituent substituted at the 6th position of dibenzothiophene.
  • the substituent of Rb is dibenzofuran
  • the compounds of the present invention have long life characteristics compared to Comparative Example C2 in which an additional aryl substituent is substituted.
  • the compounds of the present invention in which Rb contains any one of dibenzofuran, dibenzothiophene and carbazole substituents exhibit high efficiency and long life characteristics compared to Comparative Examples C4 and C5 containing only an aryl group.
  • the compounds of the present invention exhibited superior properties in terms of efficiency and life according to the position of the substituent and the type of the substituent compared to the comparative compounds.
  • substrate 2 anode

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention concerne un nouveau composé et un dispositif électroluminescent organique l'utilisant.
PCT/KR2020/006690 2019-05-22 2020-05-22 Nouveau composé et dispositif électroluminescent organique l'utilisant Ceased WO2020235955A1 (fr)

Priority Applications (1)

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CN202080006647.9A CN113166132B (zh) 2019-05-22 2020-05-22 化合物及利用其的有机发光器件

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KR10-2019-0060196 2019-05-22
KR20190060196 2019-05-22
KR10-2020-0061052 2020-05-21
KR1020200061052A KR102392659B1 (ko) 2019-05-22 2020-05-21 신규한 화합물 및 이를 이용한 유기발광 소자

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WO2020235955A1 true WO2020235955A1 (fr) 2020-11-26

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Publication number Priority date Publication date Assignee Title
JP2024041960A (ja) * 2020-09-28 2024-03-27 エルティー・マテリアルズ・カンパニー・リミテッド ヘテロ環化合物、これを含む有機発光素子、および有機物層用組成物
EP4339195A4 (fr) * 2021-12-10 2025-05-14 LT Materials Co., Ltd. Composé hétérocyclique, élément électroluminescent organique le comprenant, et composition pour couche organique d'élément électroluminescent organique

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KR20170076426A (ko) * 2015-12-24 2017-07-04 에스케이케미칼주식회사 유기전계발광소자용 화합물 및 그를 포함하는 유기전계발광소자
KR20170113321A (ko) * 2016-03-28 2017-10-12 주식회사 엘지화학 신규한 화합물 및 이를 포함하는 유기 발광 소자
KR20170113320A (ko) * 2016-03-28 2017-10-12 주식회사 엘지화학 신규한 화합물 및 이를 포함하는 유기 발광 소자
KR20190038254A (ko) * 2017-09-29 2019-04-08 덕산네오룩스 주식회사 유기전기 소자용 화합물, 이를 이용한 유기전기소자 및 그 전자 장치
KR20190038246A (ko) * 2017-09-29 2019-04-08 덕산네오룩스 주식회사 유기전기 소자용 화합물, 이를 이용한 유기전기소자 및 그 전자 장치

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KR20170076426A (ko) * 2015-12-24 2017-07-04 에스케이케미칼주식회사 유기전계발광소자용 화합물 및 그를 포함하는 유기전계발광소자
KR20170113321A (ko) * 2016-03-28 2017-10-12 주식회사 엘지화학 신규한 화합물 및 이를 포함하는 유기 발광 소자
KR20170113320A (ko) * 2016-03-28 2017-10-12 주식회사 엘지화학 신규한 화합물 및 이를 포함하는 유기 발광 소자
KR20190038254A (ko) * 2017-09-29 2019-04-08 덕산네오룩스 주식회사 유기전기 소자용 화합물, 이를 이용한 유기전기소자 및 그 전자 장치
KR20190038246A (ko) * 2017-09-29 2019-04-08 덕산네오룩스 주식회사 유기전기 소자용 화합물, 이를 이용한 유기전기소자 및 그 전자 장치

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024041960A (ja) * 2020-09-28 2024-03-27 エルティー・マテリアルズ・カンパニー・リミテッド ヘテロ環化合物、これを含む有機発光素子、および有機物層用組成物
EP4339195A4 (fr) * 2021-12-10 2025-05-14 LT Materials Co., Ltd. Composé hétérocyclique, élément électroluminescent organique le comprenant, et composition pour couche organique d'élément électroluminescent organique

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