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WO2020130327A1 - Nouveau composé et dispositif électroluminescent organique l'utilisant - Google Patents

Nouveau composé et dispositif électroluminescent organique l'utilisant Download PDF

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WO2020130327A1
WO2020130327A1 PCT/KR2019/014617 KR2019014617W WO2020130327A1 WO 2020130327 A1 WO2020130327 A1 WO 2020130327A1 KR 2019014617 W KR2019014617 W KR 2019014617W WO 2020130327 A1 WO2020130327 A1 WO 2020130327A1
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group
layer
compound
light emitting
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Korean (ko)
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차용범
홍성길
조우진
이성재
문현진
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LG Chem Ltd
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D307/91—Dibenzofurans; Hydrogenated dibenzofurans
    • 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
    • C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
    • C07D333/50—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom condensed with carbocyclic rings or ring systems
    • C07D333/76—Dibenzothiophenes
    • 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
    • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
    • C07D409/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
    • 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
    • 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
    • H10K85/6574—Polycyclic condensed heteroaromatic hydrocarbons comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
    • 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
    • H10K85/6576—Polycyclic condensed heteroaromatic hydrocarbons comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene
    • 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

Definitions

  • the present invention relates to a novel compound and an organic light emitting device using the same.
  • the organic light emitting phenomenon refers to a phenomenon that converts electrical energy into light energy using organic materials.
  • the organic light emitting device using the organic light emitting phenomenon has a wide viewing angle, excellent contrast, and a fast response time, and has excellent luminance, driving voltage, and response speed characteristics, and thus many studies have been 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 composed of a multi-layered structure composed of different materials, for example, 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.
  • Patent Document 1 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 Formula 1:
  • X is S, or O
  • L 1 and L 2 are each independently, a direct bond, or a substituted or unsubstituted C 6-60 arylene,
  • Ar 1 and Ar 2 are each independently, substituted or unsubstituted C 6-60 aryl, or C 5-60 heteroaryl comprising one or more hetero atoms selected from the group consisting of N, O and S,
  • R 1 to R 3 are each independently hydrogen, or substituted or unsubstituted C 1-60 alkyl
  • n are each independently an integer from 0 to 4,
  • o is an integer from 0 to 7.
  • 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 layer of the organic material layer provides an organic light emitting device comprising the compound of the present invention described above.
  • 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 life characteristics in the organic light emitting device.
  • the compound represented by Formula 1 may be used as a hole injection, hole transport, or electron suppressing material.
  • FIG. 1 shows an example of an organic light emitting device including a substrate 1, an anode 2, a light emitting layer 3, and a cathode 4.
  • FIG. 2 is a substrate (1), an anode (2), a hole injection layer (5), a hole transport layer (6), an electron suppressing 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 comprising the cathode 4.
  • substituted or unsubstituted refers to deuterium; Halogen group; Nitrile group; Nitro group; Hydroxy group; Carbonyl group; Ester groups; Imide group; Amino group; Phosphine oxide group; Alkoxy groups; Aryloxy group; Alkyl thioxy group; Arylthioxy group; Alkyl sulfoxy group; Aryl sulfoxyl group; Silyl group; Boron group; Alkyl groups; Cycloalkyl group; Alkenyl group; Aryl group; Aralkyl group; An alkenyl group; Alkyl aryl groups; Alkylamine groups; Aralkylamine group; Heteroarylamine group; Arylamine group; Arylphosphine group; Or substituted or unsubstituted with one or more substituents selected from the group consisting of heterocyclic groups containing one or more of N, O and S atoms, or substituted or unsubstituted with two or more
  • the number of carbon atoms of the carbonyl group is not particularly limited, but is preferably 1 to 40 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.
  • the oxygen of the ester group may be substituted 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. Specifically, 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 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 is specifically a trimethyl boron group, a triethyl boron group, a t-butyldimethyl boron group, a triphenyl boron group, a phenyl boron group, and the like, but is not limited thereto.
  • examples of the halogen group include fluorine, chlorine, bromine or iodine.
  • the alkyl group may be straight chain or branched chain, and carbon number 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, cyclohexylmethyl, octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl
  • the alkenyl group may be a straight chain or a branched chain, and the number of carbon atoms is not particularly limited, but is preferably 2 to 40. According to one embodiment, the carbon number of the alkenyl group is 2 to 20. 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, styrenyl group, styrenyl group, and the like, but are not limited thereto.
  • the cycloalkyl group is not particularly limited, but preferably has 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 one embodiment, the carbon number of the aryl group is 6 to 30. According to one embodiment, the carbon number of the aryl group is 6 to 20.
  • the aryl group may be a monocyclic aryl group, such as a phenyl group, a biphenyl group, a terphenyl group, but is not limited thereto.
  • the polycyclic aryl group may be a naphthyl group, anthracenyl group, phenanthryl group, pyrenyl group, perylenyl group, chrysenyl group, fluorenyl group, and the like, but is not limited thereto.
  • the fluorenyl group may be substituted, and two substituents may combine with each other to form a spiro structure.
  • the fluorenyl group When the fluorenyl group is substituted, It can be back. However, it is not limited thereto.
  • the heterocyclic group is a heterocyclic group containing one or more of O, N, Si, and S as heterogeneous elements, and the number of carbon atoms is not particularly limited, but is preferably 2 to 60 carbon atoms.
  • the heterocyclic group include thiophene group, furan group, pyrrol group, imidazole group, thiazole group, oxazole group, oxadiazole group, triazole group, pyridyl group, bipyridyl group, pyrimidyl group, triazine group, acridil group , Pyridazine group, pyrazinyl group, quinolinyl group, quinazolinyl group, quinoxalinyl group, phthalazinyl group, pyridopyrimidinyl group, pyrido pyrazinyl group, pyrazino pyrazinyl group, isoquinoline group, indole group ,
  • an aryl group in an aralkyl group, an alkenyl group, an alkylaryl group, and an arylamine group is the same as the exemplified aryl group described above.
  • the alkyl group among the aralkyl group, alkylaryl group, and alkylamine group is the same as the above-described alkyl group.
  • the description of the heteroaryl group among the heteroarylamines described above may be applied.
  • the alkenyl group in the alkenyl group is the same as the exemplified alkenyl group.
  • the description of the aryl group described above may be applied, except that the arylene is a divalent group.
  • the description of the heterocyclic group described above may be applied, except that the heteroarylene is a divalent group.
  • the hydrocarbon ring is not a monovalent group, and a description of the aryl group or cycloalkyl group described above may be applied, except that two substituents are formed by bonding.
  • the heterocycle is not a monovalent group, and the description of the aforementioned heterocyclic group may be applied, except that two substituents are formed by bonding.
  • the present invention provides a compound represented by Formula 1:
  • X is S, or O
  • L 1 and L 2 are each independently, a direct bond, or a substituted or unsubstituted C 6-60 arylene,
  • Ar 1 and Ar 2 are each independently, substituted or unsubstituted C 6-60 aryl, or C 5-60 heteroaryl comprising one or more hetero atoms selected from the group consisting of N, O and S,
  • R 1 to R 3 are each independently hydrogen, or substituted or unsubstituted C 1-60 alkyl
  • n are each independently an integer from 0 to 4,
  • o is an integer from 0 to 7.
  • L 1 and L 2 may each independently be a direct bond, phenylene, biphenylylene or naphthylene.
  • Ar 1 and Ar 2 are each independently phenyl, biphenylyl, terphenylyl, naphthyl, anthracenyl, phenanthrenyl, triphenylenyl, dimethylfluorenyl, dibenzylfluorenyl, di Benzofuranyl, dibenzothiophenyl, carbazolyl, 9-phenyl-9H-carbazolyl.
  • Ar 1 and Ar 2 may each independently be any one selected from the group consisting of:
  • R 1 to R 3 may each independently be hydrogen or methyl.
  • m, n and o may each independently be 0 or 1.
  • the compound represented by Formula 1 may be any one selected from the group consisting of:
  • the present invention provides an organic light emitting device comprising the compound represented by the formula (1).
  • the present invention is a first electrode; A second electrode provided to face the first electrode; And an organic light emitting device including at least one layer of an organic material provided between the first electrode and the second electrode, wherein at least one layer of the organic material layer includes a compound represented by Chemical Formula 1, and an organic light emitting device is provided. do.
  • the electron transport layer, the electron injection layer, or the layer that simultaneously performs electron injection and electron transport includes the compound represented by Chemical Formula 1.
  • the compound represented by Chemical Formula 1 according to the present invention has excellent thermal stability, has a deep HOMO level of 6.0 eV or higher, high triplet energy (ET), and hole stability.
  • an n-type dopant used in the art may be mixed and used.
  • the organic layer includes a light emitting layer and an electron transport layer
  • the electron transport layer may include a compound represented by the formula (1).
  • the organic light emitting device can be manufactured by sequentially stacking a first electrode, an organic material layer, and a second electrode on a substrate.
  • a positive electrode is formed by depositing a metal or conductive metal oxide or an alloy thereof on a substrate using a physical vapor deposition (PVD) method such as sputtering or e-beam evaporation.
  • PVD physical vapor deposition
  • an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer is formed thereon, and a material that can be used as a cathode is deposited thereon.
  • an organic light emitting device may be formed by sequentially depositing a cathode material, an organic material layer, and a cathode material on a substrate.
  • the compound represented by the formula (1) may be formed into 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 application method means spin coating, dip coating, doctor blading, inkjet printing, screen printing, spraying, roll coating, and the like, but is not limited to these.
  • an organic light emitting device may be manufactured by sequentially depositing an organic material layer and a cathode 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 positive electrode material is preferably a material having a large work function so that hole injection into the organic layer is smooth.
  • the positive electrode 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); A combination of metal and oxide such as ZnO:Al or SNO 2 :Sb; Conductive polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDOT), polypyrrole, and polyaniline, but are not limited thereto.
  • the cathode material is preferably 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;
  • a multilayer structure material such as LiF/Al or LiO 2 /Al, but is not limited thereto.
  • the hole injection layer is a layer for injecting holes from an electrode, and has the ability to transport holes as a hole injection material, and thus has a hole injection effect at an anode, an excellent hole injection effect for a light emitting layer or a light emitting material, and is produced in the light emitting layer.
  • a compound that prevents migration of the excitons to the electron injection layer or the electron injection material, and has excellent thin film formation ability is preferable. It is preferable that the highest occupied molecular orbital (HOMO) of the hole injection material is between the work function of the positive electrode material and the HOMO of the surrounding organic material layer.
  • HOMO highest occupied molecular orbital
  • the hole injection material examples include metal porphyrin, oligothiophene, arylamine-based organic substances, hexanitrile hexaazatriphenylene-based organic substances, quinacridone-based organic substances, and perylene-based substances.
  • the hole transport layer is a layer that receives holes from the hole injection layer and transports holes from the hole injection layer to the light-emitting layer. It is a material that transports holes from the anode or the hole injection layer as a hole transport material and transfers them to the light emitting layer. This is suitable. Specific examples include arylamine-based organic materials, conductive polymers, and block copolymers having a conjugated portion and a non-conjugated portion, but are not limited thereto.
  • the electron suppressing layer is a layer between the hole transport layer and the light emitting layer to prevent electrons injected from the cathode from being recombined in the light emitting layer and passing over the hole transport layer, and is also referred to as an electron blocking layer.
  • the electron suppressing layer is preferably a material having a smaller electron affinity than the electron transporting layer.
  • a material capable of emitting light in the visible light region by receiving and bonding holes and electrons from the hole transport layer and the electron transport layer, respectively is preferably a material having good quantum efficiency for fluorescence or phosphorescence.
  • Specific examples include 8-hydroxy-quinoline aluminum complex (Alq 3 ); Carbazole-based compounds; Dimerized styryl compounds; BAlq; 10-hydroxybenzo quinoline-metal compound; Benzoxazole, benzthiazole and benzimidazole-based compounds; Poly(p-phenylenevinylene) (PPV) polymers; Spiro compounds; Polyfluorene, rubrene, and the like, but are not limited to these.
  • the light emitting layer may include a host material and a dopant material.
  • the host material may be a condensed aromatic ring derivative or a heterocyclic compound.
  • condensed aromatic ring derivatives include anthracene derivatives, pyrene derivatives, naphthalene derivatives, pentacene derivatives, phenanthrene compounds, fluoranthene compounds, etc.
  • heterocyclic compounds include carbazole derivatives, dibenzofuran derivatives, and ladder types Furan compounds, pyrimidine derivatives, and the like, but are not limited thereto.
  • the dopant material examples 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, periplanene, etc. having an arylamino group, and substituted or unsubstituted as a styrylamine compound.
  • a compound in which at least one arylvinyl group is substituted with the arylamine, a substituent selected from 1 or 2 or more from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group, and an arylamino group is substituted or unsubstituted.
  • a substituent selected from 1 or 2 or more from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group, and an arylamino group is substituted or unsubstituted.
  • styrylamine, styryldiamine, styryltriamine, styryltetraamine, and the like but are not limited thereto.
  • metal complexes include, but are not limited to, iridium complexes, platinum complexes, and the like.
  • the electron transport layer is a layer that receives electrons from the electron injection layer and transports electrons to the light emitting layer.
  • the electron transport material a material capable of receiving electrons from the cathode and transferring them to the light emitting layer is suitable. Do. Specific examples include Al complexes of 8-hydroxyquinoline; Complexes including 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 or silver layer. Specifically, cesium, barium, calcium, ytterbium and samarium, followed by an aluminum layer or a silver layer in each case.
  • the electron injection layer is a layer that injects electrons from an electrode, has the ability to transport electrons, has an electron injection effect from a cathode, an excellent electron injection effect on a light emitting layer or a 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 forming ability is preferred.
  • fluorenone anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, preorenylidene methane, anthrone and the like and their derivatives, metal Complex compounds, nitrogen-containing 5-membered ring derivatives, and the like, but are not limited thereto.
  • Examples of the metal complex compound include 8-hydroxyquinolinato lithium, bis(8-hydroxyquinolinato) zinc, bis(8-hydroxyquinolinato) copper, and 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)( There are o-cresolato) gallium, bis (2-methyl-8-quinolinato) (1-naphtholato) aluminum, bis (2-methyl-8-quinolinato) (2-naphtholato) gallium, It is not limited to this.
  • the organic light emitting device may be a front emission type, a back emission type, or a double-sided emission type, depending on the material used.
  • the compound represented by Chemical 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 coated with ITO (indium tin oxide) at a thickness of 1,000 ⁇ was put in distilled water in which detergent was dissolved and washed with ultrasonic waves.
  • Fischer Fischer Co.
  • distilled water filtered secondarily by a filter of Millipore Co. was used as the distilled water.
  • ultrasonic cleaning was repeated twice with distilled water for 10 minutes.
  • ultrasonic cleaning was performed with a solvent of isopropyl alcohol, acetone, and methanol, followed by drying and transporting to a plasma cleaner.
  • the substrate was washed for 5 minutes using oxygen plasma, and then transferred to a vacuum evaporator.
  • a compound represented by the following Chemical Formula BH and a compound represented by the following Chemical Formula BD as a film thickness of 200 mm 2 on the electron suppressing layer were vacuum-deposited in a weight ratio of 25:1 to form a light emitting layer.
  • a hole blocking layer was formed by vacuum-depositing a compound represented by the following Chemical Formula HB1 with a thickness of 50 mm 2 on the light emitting layer.
  • a compound represented by the following Chemical Formula ET1 and a compound represented by the following Chemical Formula LiQ were vacuum-deposited at a weight ratio of 1:1 to form an electron injection and transport layer with a thickness of 310 MPa.
  • lithium fluoride (LiF) with a thickness of 12 ⁇ and aluminum with a thickness of 1,000 ⁇ were sequentially deposited to form a negative electrode.
  • the deposition rate of the organic material was maintained at 0.4 to 0.7 ⁇ /sec
  • the lithium fluoride of the negative electrode was maintained at a deposition rate of 0.3 ⁇ /sec
  • the aluminum was maintained at a deposition rate of 2 ⁇ /sec.
  • An organic light-emitting device was manufactured by maintaining 5x?10-6 torr.
  • An organic light-emitting device was manufactured according to the same method as Example 1-1 except for using the compound described in Table 1 below instead of the compound of Preparation Example 1.
  • An organic light-emitting device was manufactured according to the same method as Example 1-1 except for using the compound described in Table 1 below instead of the compound of Preparation Example 1.
  • the compounds of EB1, EB2, EB3, and EB4 used in Table 1 below are as follows.
  • T95 means the time required for the luminance to decrease from the initial luminance (1600 nit) to 95%.
  • the organic light emitting device using the compound of the present invention as an electron suppressing layer exhibits excellent properties in terms of efficiency, driving voltage, and stability of the organic light emitting device.
  • substrate 2 anode

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Abstract

La présente invention concerne un nouveau composé et un dispositif électroluminescent organique l'utilisant.
PCT/KR2019/014617 2018-12-20 2019-10-31 Nouveau composé et dispositif électroluminescent organique l'utilisant Ceased WO2020130327A1 (fr)

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