WO2018080066A1 - Composé organique et dispositif électroluminescent organique le comprenant - Google Patents

Composé organique et dispositif électroluminescent organique le comprenant Download PDF

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WO2018080066A1
WO2018080066A1 PCT/KR2017/011366 KR2017011366W WO2018080066A1 WO 2018080066 A1 WO2018080066 A1 WO 2018080066A1 KR 2017011366 W KR2017011366 W KR 2017011366W WO 2018080066 A1 WO2018080066 A1 WO 2018080066A1
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aryl
synthesis
alkyl
synthesis example
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김충한
손효석
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주식회사 두산
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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
    • H10K85/649—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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D209/56—Ring systems containing three or more rings
    • C07D209/80—[b, c]- or [b, d]-condensed
    • C07D209/82—Carbazoles; Hydrogenated carbazoles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/96—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings spiro-condensed with carbocyclic rings or ring systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
    • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
    • C07D405/04—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
    • C07D405/14—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing three or more hetero rings
    • 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
    • C07D409/04—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 directly linked by a ring-member-to-ring-member bond
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
    • 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
    • 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 novel organic compounds that can be used as materials for organic electroluminescent devices and organic electroluminescent devices comprising the same.
  • the material used as the organic material layer may be classified into a light emitting material, a hole injection material, a hole transport material, an electron transport material, an electron injection material and the like according to its function.
  • the light emitting materials may be classified into blue, green, and red light emitting materials, and yellow and orange light emitting materials for better natural colors according to light emission colors.
  • a host / dopant system may be used as the light emitting material in order to increase the light emission efficiency through increase in color purity and energy transfer.
  • the dopant material may be divided into a fluorescent dopant using an organic material and a phosphorescent dopant using a metal complex compound containing heavy atoms such as Ir and Pt.
  • a metal complex compound containing heavy atoms such as Ir and Pt.
  • NPB, BCP, Alq 3 and the like are widely known as hole injection layers, hole transport layers, hole blocking layers, and electron transport layer materials, and anthracene derivatives have been reported as emission layer materials.
  • metal complex compounds containing Ir such as Firpic, Ir (ppy) 3 , and (acac) Ir (btp) 2 , which have advantages in terms of efficiency improvement among the light emitting layer materials, are blue, green, and red. (red) is used as the phosphorescent dopant material, 4,4-dicarbazolybiphenyl (CBP) is used as the phosphorescent host material.
  • the conventional organic material has an advantageous aspect in terms of light emission characteristics, but the thermal stability is not very good due to the low glass transition temperature, it is not a satisfactory level in terms of the life of the organic EL device. Therefore, development of an organic material layer material excellent in performance is desired.
  • the present invention can be applied to an organic electroluminescent device, and an object of the present invention is to provide a novel organic compound having excellent holes, electron injection and transport ability, light emitting ability and the like.
  • Another object of the present invention is to provide an organic electroluminescent device including the novel organic compound, which exhibits low driving voltage and high luminous efficiency and has an improved lifetime.
  • the present invention provides a compound represented by the following formula (1):
  • X is selected from the group consisting of O, S, Se, N (Ar 2 ), C (Ar 3 ) (Ar 4 ) and Si (Ar 5 ) (Ar 6 );
  • Rings A and B are each independently selected from the group consisting of C 6 ⁇ C 30 arene and 5 to 30 heteroarenes of nuclear atoms;
  • L 1 is selected from the group consisting of a single bond, an arylene group having 6 to 18 carbon atoms and a heteroarylene group having 5 to 18 nuclear atoms;
  • l and o are each independently an integer from 0 to 4.
  • n are each independently an integer from 0 to 2;
  • R 1 to R 4 are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 Of cycloalkyl group, 3 to 40 heterocycloalkyl group, C 6 ⁇ C 60 aryl group, 5 to 60 heteroaryl group, C 1 ⁇ C 40 alkyloxy group, C 6 ⁇ C 60 Aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 An arylphosphanyl group, a C 6 -C 60 mono or diarylphosphinyl group, and a C 6 -C 60 arylamine group, or combine with an adjacent group to form a condensed ring, and R
  • Ar 1 to Ar 6 are each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 cycloalkyl group, C 3 -C 40 heterocycloalkyl group, C 6 -C 60 aryl group, C 5-60 heteroaryl group, C 1 -C 40 alkyloxy group, C 6- C 60 aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 aryl phosphazene group, selected from the group consisting of an arylamine C 6 ⁇ C 60 mono or diaryl phosphine blood group and a C 6 ⁇ C 60 of, or by combining the adjacent tile to form
  • a heterocycloalkyl group, an arylamine group, an alkylsilyl group, an alkyl boron group, an aryl boron group, an arylphosphanyl group, a mono or diarylphosphinyl group and an arylsilyl group are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 Alkyl group, C 2 ⁇ C 40 Alkenyl group, C 2 ⁇ C 40 Alkynyl group, C 6 ⁇ C 60
  • the present invention includes an anode, a cathode and one or more organic material layers interposed between the anode and the cathode, and at least one of the one or more organic material layers provides an organic electroluminescent device comprising the compound of Formula 1. .
  • Alkyl in the present invention is a monovalent substituent derived from a straight or branched chain saturated hydrocarbon having 1 to 40 carbon atoms, examples of which are methyl, ethyl, propyl, isobutyl, sec-butyl, pentyl, iso-amyl and hexyl And the like, but are not limited thereto.
  • Alkenyl in the present invention is a monovalent substituent derived from a straight or branched chain unsaturated hydrocarbon having 2 to 40 carbon atoms having at least one carbon-carbon double bond, and examples thereof include vinyl, Allyl, isopropenyl, 2-butenyl, and the like, but is not limited thereto.
  • Alkynyl in the present invention is a monovalent substituent derived from a C2-C40 straight or branched chain unsaturated hydrocarbon having one or more carbon-carbon triple bonds, examples of which are ethynyl. , 2-propynyl, and the like, but is not limited thereto.
  • Aryl in the present invention means a monovalent substituent derived from an aromatic hydrocarbon having 6 to 60 carbon atoms in which a single ring or two or more rings are combined.
  • monovalent having two or more rings condensed with each other, containing only carbon as a ring forming atom for example, may have 8 to 60 carbon atoms
  • the whole molecule has non-aromacity Substituents may also be included. Examples of such aryl include, but are not limited to, phenyl, naphthyl, phenanthryl, anthryl, fluorenyl, and the like.
  • Heteroaryl in the present invention means a monovalent substituent derived from a monoheterocyclic or polyheterocyclic aromatic hydrocarbon having 5 to 60 nuclear atoms. At least one carbon in the ring, preferably 1 to 3 carbons, is substituted with a heteroatom selected from N, O, P, S and Se. In addition, two or more rings are simply pendant or condensed with each other, and in addition to carbon as a ring forming atom, a hetero atom selected from N, O, P, S and Se, the entire molecule is non-aromatic (non- It is also interpreted to include monovalent groups having aromacity).
  • heteroaryl examples include 6-membered monocyclic rings such as pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl; Polycyclics such as phenoxathienyl, indolinzinyl, indolyl, purinyl, quinolyl, benzothiazole, carbazolyl ring; 2-furanyl, N-imidazolyl, 2-isoxazolyl, 2-pyridinyl, 2-pyrimidinyl, and the like, but are not limited thereto.
  • aryloxy is a monovalent substituent represented by RO-, wherein R means aryl having 5 to 60 carbon atoms.
  • R means aryl having 5 to 60 carbon atoms. Examples of such aryloxy include, but are not limited to, phenyloxy, naphthyloxy, diphenyloxy, and the like.
  • alkyloxy is a monovalent substituent represented by R'O-, wherein R 'means 1-40 alkyl, and is linear, branched or cyclic structure.
  • alkyloxy include, but are not limited to, methoxy, ethoxy, n-propoxy, 1-propoxy, t-butoxy, n-butoxy, pentoxy and the like.
  • Arylamine in the present invention means an amine substituted with aryl having 6 to 60 carbon atoms.
  • cycloalkyl in the present invention is meant monovalent substituents derived from monocyclic or polycyclic non-aromatic hydrocarbons having 3 to 40 carbon atoms.
  • examples of such cycloalkyl include, but are not limited to, cyclopropyl, cyclopentyl, cyclohexyl, norbornyl, adamantine, and the like.
  • Heterocycloalkyl in the present invention means a monovalent substituent derived from 3 to 40 non-aromatic hydrocarbons having 3 to 40 nuclear atoms, and at least one carbon in the ring, preferably 1 to 3 carbons is N, O, Substituted with a hetero atom such as S or Se.
  • heterocycloalkyl include, but are not limited to, morpholine, piperazine, and the like.
  • alkylsilyl means silyl substituted with alkyl having 1 to 40 carbon atoms
  • arylsilyl means silyl substituted with aryl having 5 to 60 carbon atoms.
  • Condensed ring in the present invention means a condensed aliphatic ring, a condensed aromatic ring, a condensed heteroaliphatic ring, a condensed heteroaromatic ring, or a combination thereof.
  • the compound represented by Formula 1 of the present invention may be used as a material of the organic material layer of the organic electroluminescent device because of its excellent thermal stability and luminescence properties.
  • an organic electroluminescent device having excellent light emission performance, low driving voltage, high efficiency, and long life compared to a conventional host material can be manufactured. Full color display panels with improved performance and lifetime can also be manufactured.
  • FIG. 1 illustrates a cross-sectional view of an organic electroluminescent device according to an embodiment of the present invention.
  • FIG. 2 illustrates a cross-sectional view of an organic electroluminescent device according to an embodiment of the present invention.
  • organic layer 31 hole transport layer
  • the present invention provides a compound represented by the following formula (1):
  • X is selected from the group consisting of O, S, Se, N (Ar 2 ), C (Ar 3 ) (Ar 4 ) and Si (Ar 5 ) (Ar 6 );
  • Rings A and B are each independently selected from the group consisting of C 6 ⁇ C 30 arene and 5 to 30 heteroarenes of nuclear atoms;
  • L 1 is selected from the group consisting of a single bond, an arylene group having 6 to 18 carbon atoms and a heteroarylene group having 5 to 18 nuclear atoms;
  • l and o are each independently an integer from 0 to 4.
  • n are each independently an integer from 0 to 2;
  • R 1 to R 4 are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 Of cycloalkyl group, 3 to 40 heterocycloalkyl group, C 6 ⁇ C 60 aryl group, 5 to 60 heteroaryl group, C 1 ⁇ C 40 alkyloxy group, C 6 ⁇ C 60 Aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 An arylphosphanyl group, a C 6 -C 60 mono or diarylphosphinyl group, and a C 6 -C 60 arylamine group, or combine with an adjacent group to form a condensed ring, and R
  • Ar 1 to Ar 6 are each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 cycloalkyl group, C 3 -C 40 heterocycloalkyl group, C 6 -C 60 aryl group, C 5-60 heteroaryl group, C 1 -C 40 alkyloxy group, C 6- C 60 aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 aryl phosphazene group, selected from the group consisting of an arylamine C 6 ⁇ C 60 mono or diaryl phosphine blood group and a C 6 ⁇ C 60 of, or by combining the adjacent tile to form
  • a heterocycloalkyl group, an arylamine group, an alkylsilyl group, an alkyl boron group, an aryl boron group, an arylphosphanyl group, a mono or diarylphosphinyl group and an arylsilyl group are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 Alkyl group, C 2 ⁇ C 40 Alkenyl group, C 2 ⁇ C 40 Alkynyl group, C 6 ⁇ C 60
  • novel compounds of the present invention can be represented by the following formula (1):
  • X is selected from the group consisting of O, S, Se, N (Ar 2 ), C (Ar 3 ) (Ar 4 ) and Si (Ar 5 ) (Ar 6 );
  • Rings A and B are each independently selected from the group consisting of C 6 ⁇ C 30 arene and 5 to 30 heteroarenes of nuclear atoms;
  • L 1 is selected from the group consisting of a single bond, an arylene group having 6 to 18 carbon atoms and a heteroarylene group having 5 to 18 nuclear atoms;
  • l and o are each independently an integer from 0 to 4.
  • n are each independently an integer from 0 to 2;
  • R 1 to R 4 are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 Of cycloalkyl group, 3 to 40 heterocycloalkyl group, C 6 ⁇ C 60 aryl group, 5 to 60 heteroaryl group, C 1 ⁇ C 40 alkyloxy group, C 6 ⁇ C 60 Aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 An arylphosphanyl group, a C 6 -C 60 mono or diarylphosphinyl group, and a C 6 -C 60 arylamine group, or combine with an adjacent group to form a condensed ring, and R
  • Ar 1 to Ar 6 are each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 cycloalkyl group, C 3 -C 40 heterocycloalkyl group, C 6 -C 60 aryl group, C 5-60 heteroaryl group, C 1 -C 40 alkyloxy group, C 6- C 60 aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 aryl phosphazene group, selected from the group consisting of an arylamine C 6 ⁇ C 60 mono or diaryl phosphine blood group and a C 6 ⁇ C 60 of, or by combining the adjacent tile to form
  • a heterocycloalkyl group, an arylamine group, an alkylsilyl group, an alkyl boron group, an aryl boron group, an arylphosphanyl group, a mono or diarylphosphinyl group and an arylsilyl group are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 Alkyl group, C 2 ⁇ C 40 Alkenyl group, C 2 ⁇ C 40 Alkynyl group, C 6 ⁇ C 60
  • the novel compound provided in the present invention forms a basic skeleton by combining xanthene moiety with carbazole, and is specifically represented by Chemical Formula 1. Since the compound represented by the formula (1) has a higher molecular weight than the conventional organic electroluminescent device material (for example, 4,4-dicarbazolylbiphenyl (hereinafter referred to as 'CBP')), the glass transition temperature is high thermally Not only is it excellent in stability, it is also excellent in carrier transport ability, light emission ability, etc. Therefore, when the compound of Formula 1 is used in the manufacture of the organic EL device, the driving voltage, efficiency, lifespan, etc. of the device may be improved.
  • the conventional organic electroluminescent device material for example, 4,4-dicarbazolylbiphenyl (hereinafter referred to as 'CBP')
  • 'CBP' 4,4-dicarbazolylbiphenyl
  • the host material should have a triplet energy gap of which is higher than the triplet energy gap of the dopant. That is, when the lowest excited state of the host is higher in energy than the lowest emitted state of the dopant, phosphorescence efficiency may be improved.
  • the compound of Formula 1 of the present invention has a higher triplet energy, a specific substituent is introduced into the basic skeleton condensed with a broad singlet energy level and a high triplet energy level, the energy level is higher than the dopant It can be adjusted and used as a host material.
  • the compound of the present invention since the compound of the present invention has a high triplet energy as described above, it is possible to prevent the excitons generated in the light emitting layer from diffusing into the electron transporting layer or the hole transporting layer adjacent to the light emitting layer. Therefore, when the organic material layer (hereinafter, referred to as a 'light emitting auxiliary layer') is formed between the hole transport layer and the light emitting layer by using the compound of Formula 1, the exciton is prevented from being diffused by the compound, and thus the first exciton is diffused. Unlike conventional organic electroluminescent devices that do not include a barrier layer, the number of excitons that substantially contribute to light emission in the light emitting layer may be increased, thereby improving the luminous efficiency of the device.
  • the organic material layer hereinafter, referred to as a 'light emitting auxiliary layer'
  • the compound represented by Chemical Formula 1 may be used as a light emitting auxiliary layer material or a life improvement layer material other than the host of the light emitting layer.
  • the compound of Formula 1 may adjust HOMO and LUMO energy levels according to the type of substituents introduced into the basic skeleton, may have a wide bandgap, it may have a high carrier transport.
  • the compound has a high electron-absorbing electron withdrawing group (EWG) such as a nitrogen-containing heterocycle (eg, pyridine group, pyrimidine group, triazine group, etc.) to the basic skeleton, the entire molecule is Since it has a bipolar characteristic, it is possible to increase the bonding force between the hole and the electron.
  • EWG electron-absorbing electron withdrawing group
  • the compound of Formula 1 having EWG introduced into the basic skeleton has excellent carrier transport properties and luminescent properties, and thus, as an electron injection / transport layer material or a life improvement layer material, in addition to the light emitting layer material of the organic EL device. Can be used.
  • an electron donor group EWG
  • the hole injection and transport is smooth.
  • it can be usefully used as a hole injection / transport layer or a light emitting auxiliary layer material.
  • the compound represented by Chemical Formula 1 may improve the light emission characteristics of the organic EL device, and may also improve the hole injection / transport ability, the electron injection / transport capability, the luminous efficiency, the driving voltage, and the lifespan characteristics.
  • the compound of formula 1 according to the present invention is an organic material layer material of an organic electroluminescent device, preferably a light emitting layer material (blue, green and / or red phosphorescent host material), an electron transport / injection layer material and a hole transport / injection layer It can be used as a material, a light emission auxiliary layer material, a life improvement layer material, more preferably a light emission layer material, an electron injection layer material, a light emission auxiliary layer material, and a life improvement layer material.
  • the compound of the formula 1 of the present invention is introduced into the various skeleton, especially the aryl group and / or heteroaryl group in the basic skeleton significantly increases the molecular weight of the compound, thereby improving the glass transition temperature, thereby It may have higher thermal stability than conventional light emitting materials (eg CBP).
  • the compound represented by the formula (1) is effective in suppressing the crystallization of the organic material layer. Therefore, the organic electroluminescent device including the compound of Formula 1 according to the present invention can greatly improve performance and lifespan characteristics, and the full-color organic light emitting panel to which the organic electroluminescent device is applied can also maximize its performance.
  • the ring A and B may be independently represented by any one of the following Formulas 2 to 4:
  • the dotted line means the part where condensation takes place.
  • At least one of the rings A and B is represented by the formula (3) or 4, it is preferable to lower the driving voltage and increase the luminous efficiency.
  • the compound may be represented by any one of the following Formulas 5 to 12.
  • X, Ar 1 , L 1 , R 1 , R 4 , l and o are each as defined in Chemical Formula 1.
  • the compound is particularly preferably a compound represented by any one of Formulas 7 to 12, it is preferable to lower the driving voltage and increase the luminous efficiency.
  • L 1 may be a single bond or a linker represented by any one of the following Formulas A-1 to A-3:
  • Ar 1 may be a substituent represented by the following formula (13):
  • Z 1 to Z 5 are each independently N or C (R 5 );
  • R 5 is deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 cycloalkyl group, nuclear atom 3 to 40 heterocycloalkyl groups, C 6 to C 60 aryl groups, 5 to 60 heteroaryl groups, C 1 to C 40 alkyloxy groups, C 6 to C 60 aryloxy groups, C An alkylsilyl group of 3 to C 40 , an arylsilyl group of C 6 to C 60 , an alkyl boron group of C 1 to C 40, an aryl boron group of C 6 to C 60 , an arylphosphanyl group of C 6 to C 60 , C 6 ⁇ C 60 mono or diaryl phosphinyl group and C 6 ⁇ C 60 arylamine group selected from the group consisting of, or combine with adjacent groups to form a condensed
  • R 5 may be selected from the group consisting of C 1 ⁇ C 30 Alkyl group, C 6 ⁇ C 30 aryl group and 5 to 30 heteroaryl groups.
  • R 5 may be selected from the group consisting of phenyl group, biphenyl group, naphthalenyl group, pyridinyl group, pyrimidinyl group and triazinyl group.
  • the substituent represented by Formula 13 may be a substituent represented by the following Formula 14:
  • R 6 and R 7 are each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 cycloalkyl group, C 3 -C 40 heterocycloalkyl group, C 6 -C 60 aryl group, C 5-60 heteroaryl group, C 1 -C 40 alkyloxy group, C 6- C 60 aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 aryl phosphazene group, selected from the group consisting of an arylamine C 6 ⁇ C 60 mono or diaryl phosphine blood group and a C 6 ⁇ C 60 of, or by combining the adjacent tile to form
  • Alkyl group, alkenyl group, alkynyl group, aryl group, heteroaryl group, aryloxy group, alkyloxy group, cycloalkyl group, heterocycloalkyl group, arylamine group, alkylsilyl group, alkyl boron group, aryl of R 6 and R 7 Boron, arylphosphanyl, mono or diarylphosphinyl and arylsilyl groups are each independently deuterium, halogen, cyano, nitro, C 1 -C 40 alkyl, C 2 -C 40 alkenyl, C Alkynyl group of 2 to C 40 , aryl group of C 6 to C 60 , heteroaryl group of 5 to 60 nuclear atoms, aryloxy group of C 6 to C 60 , alkyloxy group of C 1 to C 40 , C 6 ⁇ C 60 arylamine group, C 3 ⁇ C 40 cycloalkyl group, a number of nuclear atoms
  • Z 1 , Z 3 and Z 5 are each as defined in Chemical Formula 13.
  • Ar 1 may be a substituent represented by Formula 15:
  • R 8 and R 9 are each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 cycloalkyl group, C 3 -C 40 heterocycloalkyl group, C 6 -C 60 aryl group, C 5-60 heteroaryl group, C 1 -C 40 alkyloxy group, C 6- C 60 aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 aryl phosphazene group, selected from the group consisting of an arylamine C 6 ⁇ C 60 mono or diaryl phosphine blood group and a C 6 ⁇ C 60 of, or by combining the adjacent tile to form
  • R 8 and R 9 are each independently selected from the group consisting of C 1 ⁇ C 30 Alkyl group, C 6 ⁇ C 30 aryl group and 5 to 30 heteroaryl group of nuclear atoms Can be selected.
  • R 8 and R 9 may be independently selected from the group consisting of a phenyl group, a biphenyl group, a naphthalenyl group and a fluorenyl group.
  • Ar 1 may be a substituent represented by any one of the following Formulas B-1 to B-8:
  • Z 5 to Z 12 are each independently N or C (R 12 );
  • Any one of Z 5 to Z 8 bonded to L 1 in Formula B-1 is C (R 12 ), wherein R 12 is absent;
  • T 1 and T 2 are each independently selected from the group consisting of a single bond, C (R 13 ) (R 14 ), N (R 15 ), O and S, but not both T 1 and T 2 are single bonds;
  • q and r are each independently integers of 0 to 4.
  • R 10 and R 11 are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 6 ⁇ C 60 the aryl group, the number of nuclear atoms of 5 to 60 heteroaryl group, an aryloxy group of C 6 ⁇ C 60, C 1 ⁇ C 40 alkyloxy group of, C 3 ⁇ C 40 cycloalkyl group, a number of nuclear atoms of 3 to 40 Heterocycloalkyl groups, C 6 to C 60 arylamine groups, C 1 to C 40 alkylsilyl groups, C 1 to C 40 alkylboron groups, C 6 to C 60 aryl boron groups, C 6 to C 60 An arylphosphanyl group, a C 6 ⁇ C 60 mono or diaryl phosphinyl group and a C 6 ⁇ C 60 arylsilyl group, or
  • R 12 to R 15 are each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 6 ⁇ C 60 aryl group, 5 to 60 heteroaryl groups, C 6 to C 60 aryloxy group, C 1 to C 40 alkyloxy group, C 3 to C 40 cycloalkyl group, nuclear atom 3 To 40 heterocycloalkyl groups, C 6 to C 60 arylamine groups, C 1 to C 40 alkylsilyl groups, C 1 to C 40 alkylboron groups, C 6 to C 60 aryl boron groups, C 6 to C 60 aryl phosphazene group, selected from the group consisting of C 6 ⁇ C 60 mono or diaryl the Phosphinicosuccinic group and a C 6 ⁇ with an aryl silyl group of C 60, or combine tile adjacent to which they are attached may form
  • alkyl group, alkenyl group, alkynyl group, aryl group, heteroaryl group, aryloxy group, alkyloxy group, cycloalkyl group, heterocycloalkyl group, arylamine group, alkylsilyl group, alkyl boron group, aryl of the above R 10 to R 15 Boron, arylphosphanyl, mono or diarylphosphinyl and arylsilyl groups are each independently deuterium, halogen, cyano, nitro, C 1 -C 40 alkyl, C 2 -C 40 alkenyl, C Alkynyl group of 2 to C 40 , aryl group of C 6 to C 60 , heteroaryl group of 5 to 60 nuclear atoms, aryloxy group of C 6 to C 60 , alkyloxy group of C 1 to C 40 , C 6 ⁇ C 60 arylamine group, C 3 ⁇ C 40 cycloalkyl group, a number of nuclear
  • Ar 1 may be a substituent represented by any one of the following Formulas C-1 to C-14:
  • q, r and s are each independently integers of 0 to 4.
  • R 10 , R 11 and R 16 are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 6 ⁇ C 60 aryl group, the number of nuclear atoms of 5 to 60 heteroaryl group, C 6 ⁇ C 60 aryloxy group, C 1 ⁇ C 40 alkyloxy group of, C 3 ⁇ C 40 cycloalkyl group, a nuclear atoms 3 to 40 heterocycloalkyl groups, C 6 to C 60 arylamine groups, C 1 to C 40 alkylsilyl groups, C 1 to C 40 alkylboron groups, C 6 to C 60 aryl boron groups, C 6 ⁇ C 60 aryl phosphazene group, selected from the group consisting arylsilyl a C 6 ⁇ C 60 mono or diaryl phosphine blood group and a C 6 ⁇ C 60
  • R 12 to R 15 are each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 6 ⁇ C 60 aryl group, 5 to 60 heteroaryl groups, C 6 to C 60 aryloxy group, C 1 to C 40 alkyloxy group, C 3 to C 40 cycloalkyl group, nuclear atom 3 To 40 heterocycloalkyl groups, C 6 to C 60 arylamine groups, C 1 to C 40 alkylsilyl groups, C 1 to C 40 alkylboron groups, C 6 to C 60 aryl boron groups, C 6 to mono or diaryl phosphine of C 60 aryl phosphazene group, C 6 ⁇ C 60 of the blood group and a C 6 ⁇ C 60 selected from an aryl silyl group the group consisting of or of, by combining groups adjacent to form a conden
  • alkyl group, alkenyl group, alkynyl group, aryl group, heteroaryl group, aryloxy group, alkyloxy group, cycloalkyl group, heterocycloalkyl group, arylamine group, alkylsilyl group, alkyl boron group, aryl of the above R 10 to R 16 Boron, arylphosphanyl, mono or diarylphosphinyl and arylsilyl groups are each independently deuterium, halogen, cyano, nitro, C 1 -C 40 alkyl, C 2 -C 40 alkenyl, C Alkynyl group of 2 to C 40 , aryl group of C 6 to C 60 , heteroaryl group of 5 to 60 nuclear atoms, aryloxy group of C 6 to C 60 , alkyloxy group of C 1 to C 40 , C 6 ⁇ C 60 arylamine group, C 3 ⁇ C 40 cycloalkyl group, a number of nuclear
  • R 10 to R 16 are each independently selected from a C 1 to C 30 alkyl group, C 6 to C 30 aryl group and a nuclear atom of 5 to 30 heteroaryl group in the group Can be selected.
  • R 10 to R 16 may be each independently selected from the group consisting of a phenyl group, a biphenyl group and a naphthalenyl group.
  • R 13 and R 14 may be each independently selected from the group consisting of hydrogen, C 1 ⁇ C 30 Alkyl group and C 6 ⁇ C 30 An aryl group.
  • R 13 and R 14 may be each independently selected from the group consisting of hydrogen, methyl group, ethyl group, butyl group and phenyl group.
  • Compound represented by Formula 1 of the present invention may be represented by the following compounds, but is not limited thereto:
  • organic electroluminescent device comprising the compound represented by the formula (1) according to the present invention.
  • the present invention is an organic electroluminescent device comprising an anode, a cathode, and at least one organic layer interposed between the anode and the cathode, wherein at least one of the at least one organic layer It includes a compound represented by the formula (1).
  • the compound may be used alone or mixed two or more.
  • the one or more organic material layers may be any one or more of a hole injection layer, a hole transport layer, a light emitting layer, a light emitting auxiliary layer, a life improvement layer, an electron transport layer, an electron transport auxiliary layer and an electron injection layer, wherein at least one organic material layer is It may include a compound represented by 1.
  • the structure of the organic EL device according to the present invention described above is not particularly limited, but referring to FIG. 1 as an example, for example, the anode 10 and the cathode 20 facing each other, and the anode 10 and the cathode ( 20) and an organic layer 30 positioned between them.
  • the organic layer 30 may include a hole transport layer 31, a light emitting layer 32, and an electron transport layer 34.
  • a hole transport auxiliary layer 33 may be included between the hole transport layer 31 and the light emitting layer 32
  • an electron transport auxiliary layer 35 may be included between the electron transport layer 34 and the light emitting layer 32. can do.
  • the organic layer 30 may further include a hole injection layer 37 between the hole transport layer 31 and the anode 10, the electron transport layer 34 and the cathode
  • the electron injection layer 36 may be further included between the holes 20.
  • the hole injection layer 37 stacked between the hole transport layer 31 and the anode 10 may not only improve the interface property between the ITO used as the anode and the organic material used as the hole transport layer 31.
  • the surface is applied to the upper surface of the uneven ITO to soften the surface of the ITO, a layer that can be used without particular limitation as long as it is commonly used in the art, for example, may be used an amine compound It is not limited to this.
  • the electron injection layer 36 is stacked on top of the electron transport layer to facilitate the injection of electrons from the cathode to perform a function that ultimately improves the power efficiency, which is specially used in the art It can be used without limitation, and materials such as LiF, Liq, NaCl, CsF, Li 2 O, BaO and the like can be used.
  • a light emitting auxiliary layer may be further included between the hole transport auxiliary layer 33 and the light emitting layer 32.
  • the emission auxiliary layer may serve to transport holes to the emission layer 32 and to adjust the thickness of the organic layer 30.
  • the emission auxiliary layer may include a hole transport material, and may be made of the same material as the hole transport layer 31.
  • a life improvement layer may be further included between the electron transport auxiliary layer 35 and the light emitting layer 32. Holes traveling through the ionization potential level in the organic light emitting device to the light emitting layer 32 are blocked by the high energy barrier of the lifespan improvement layer, and thus do not diffuse or move to the electron transport layer, and consequently, the holes are limited to the light emitting layer. .
  • Such a function of limiting holes to the light emitting layer prevents holes from diffusing into the electron transporting layer that moves electrons by reduction, thereby suppressing the lifespan phenomenon through irreversible decomposition reaction by oxidation and contributing to improving the life of the organic light emitting device. Can be.
  • the novel compound provided in the present invention forms a basic skeleton by combining xanthene moiety with carbazole, and is specifically represented by Chemical Formula 1. Since the compound represented by the formula (1) has a higher molecular weight than the conventional organic electroluminescent device material (for example, 4,4-dicarbazolylbiphenyl (hereinafter referred to as 'CBP')), the glass transition temperature is high thermally Not only is it excellent in stability, it is also excellent in carrier transport ability, light emission ability, etc. Therefore, when the compound of Formula 1 is used in the manufacture of the organic EL device, the driving voltage, efficiency, lifespan, etc. of the device may be improved.
  • the conventional organic electroluminescent device material for example, 4,4-dicarbazolylbiphenyl (hereinafter referred to as 'CBP')
  • 'CBP' 4,4-dicarbazolylbiphenyl
  • the compound of Formula 1 may adjust HOMO and LUMO energy levels according to the type of substituents introduced into the basic skeleton, may have a wide bandgap, it may have a high carrier transport.
  • the compound has a high electron-absorbing electron withdrawing group (EWG) such as a nitrogen-containing heterocycle (eg, pyridine group, pyrimidine group, triazine group, etc.) to the basic skeleton, the entire molecule is Since it has a bipolar characteristic, it is possible to increase the bonding force between the hole and the electron.
  • EWG electron-absorbing electron withdrawing group
  • the compound of Formula 1 having EWG introduced into the basic skeleton has excellent carrier transport properties and luminescent properties, and thus, as an electron injection / transport layer material or a life improvement layer material, in addition to the light emitting layer material of the organic EL device. Can be used.
  • an electron donor group EWG
  • the hole injection and transport is smooth.
  • it can be usefully used as a hole injection / transport layer or a light emitting auxiliary layer material.
  • the compound represented by Chemical Formula 1 may improve the light emission characteristics of the organic EL device, and may also improve the hole injection / transport ability, the electron injection / transport capability, the luminous efficiency, the driving voltage, and the lifespan characteristics.
  • the organic material layer including the compound represented by Formula 1 is preferably selected from the group consisting of a hole injection layer, a hole transport layer, a light emitting layer, a light emitting auxiliary layer, an electron transport layer and an electron injection layer, more preferably a light emitting layer, electron It may be a transport layer or a hole transport layer.
  • the compound represented by Formula 1 may be used as a phosphorescent host, a fluorescent host or a dopant material of the light emitting layer, preferably a phosphorescent host (blue, green). And / or red phosphorescent host materials).
  • the organic electroluminescent device may not only sequentially stack an anode, at least one organic material layer, and a cathode as described above, but may further include an insulating layer or an adhesive layer at an interface between the electrode and the organic material layer.
  • the organic electroluminescent device of the present invention uses materials and methods known in the art, except that at least one of the organic material layers (for example, an electron transport auxiliary layer) is formed to include the compound represented by Chemical Formula 1. It can be prepared by forming other organic material layer and electrode using.
  • the organic material layers for example, an electron transport auxiliary layer
  • the organic material layer may be formed by a vacuum deposition method or a solution coating method.
  • the solution coating method include, but are not limited to, spin coating, dip coating, doctor blading, inkjet printing, or thermal transfer.
  • the substrate usable in the present invention is not particularly limited, and silicon wafers, quartz, glass plates, metal plates, plastic films, sheets, and the like may be used.
  • the positive electrode material may be made of a high work function conductor, for example, to facilitate hole injection, and may 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), indium zinc oxide (IZO); Combinations of metals and oxides such as ZnO: Al or SnO 2 : Sb; Conductive polymers such as polythiophene, poly (3-methylthiophene), poly [3,4- (ethylene-1,2-dioxy) thiophene] (PEDT), polypyrrole or polyaniline; And carbon black, but are not limited thereto.
  • metals such as vanadium, chromium, copper, zinc, and gold or alloys thereof
  • Metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), indium zinc oxide (IZO); Combinations of metals and oxides such as ZnO: Al or SnO 2 : Sb
  • the cathode material may be made of a low work function conductor, for example, to facilitate electron injection, and may include magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, or lead. The same metal or alloys thereof; And multilayer structure materials such as LiF / Al or LiO 2 / Al, and the like.

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  • Electroluminescent Light Sources (AREA)
  • Optics & Photonics (AREA)

Abstract

La présente invention concerne un nouveau composé et un dispositif électroluminescent organique le contenant. Le composé selon la présente invention est utilisé pour une couche organique d'un dispositif électroluminescent organique, et de préférence pour une couche luminescente, une couche de transfert d'électrons, ou une couche de transfert de trous, il est possible d'améliorer l'efficacité lumineuse, la tension de commande, la durée de vie, etc. du dispositif électroluminescent organique.
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