WO2024167337A1 - 신규한 화합물 및 이를 이용한 유기 발광 소자 - Google Patents
신규한 화합물 및 이를 이용한 유기 발광 소자 Download PDFInfo
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Definitions
- the present invention relates to a novel compound and an organic light-emitting device comprising the same.
- the organic luminescence phenomenon refers to the phenomenon of converting electrical energy into light energy using organic materials.
- Organic light-emitting devices utilizing the organic luminescence phenomenon have a wide viewing angle, excellent contrast, fast response time, and excellent brightness, driving voltage, and response speed characteristics, so much research is being conducted.
- Organic light-emitting devices generally have a structure including an anode, a cathode, and an organic layer between the anode and the cathode.
- the organic layer is often composed of a multilayer structure composed of different materials in order to increase the efficiency and stability of the organic light-emitting device, and may be composed of, for example, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, etc.
- Patent Document 0001 Korean Patent Publication No. 10-2000-0051826
- the present invention relates to a novel compound and an organic light-emitting device comprising the same.
- the present invention provides a compound represented by the following chemical formula 1:
- Ar 1 and Ar 2 are each independently a substituted or unsubstituted C 6-60 aryl; or a C 2-60 heteroaryl comprising at least one heteroatom selected from the group consisting of substituted or unsubstituted N, O and S,
- R 1 to R 8 are each independently deuterium; or substituted or unsubstituted C 6-60 aryl, provided that at least one of R 1 to R 8 is deuterium,
- R 9 to R 11 is a bond with the following chemical formula 2, and the others are each independently hydrogen or deuterium,
- R 12 is hydrogen or deuterium
- X is O or S
- R 13 to R 16 is a bond with the above formula 1, and the others are each independently hydrogen; deuterium; or substituted or unsubstituted C 6-60 aryl,
- R 17 to R 20 are each independently hydrogen; deuterium; or substituted or unsubstituted C 6-60 aryl.
- the present invention provides an organic light-emitting device including a first electrode; a second electrode provided opposite the first electrode; and at least one organic layer provided between the first electrode and the second electrode, wherein at least one layer of the organic layers includes a compound represented by the chemical formula 1.
- the compound represented by the chemical formula 1 described above can be used as a material of an organic layer of an organic light-emitting device, and can exhibit effects of improving efficiency, lowering driving voltage, and/or improving lifespan characteristics in the organic light-emitting device.
- the compound represented by the chemical formula 1 described above can be used as a hole injection, hole transport, hole injection and transport, electron suppression, luminescence, electron transport, or electron injection material.
- Figure 1 illustrates an example of an organic light-emitting device composed of a substrate (1), an anode (2), an organic layer (3), and a cathode (4).
- Figure 2 illustrates an example of an organic light-emitting device composed of a substrate (1), an anode (2), a hole injection layer (5), a hole transport layer (6), an electron suppression layer (7), an emitting layer (8), a hole suppression layer (9), an electron transport layer (10), an electron injection layer (11), and a cathode (4).
- Figure 3 illustrates an example of an organic light-emitting device composed of a substrate (1), an anode (2), a hole injection layer (5), a hole transport layer (6), an electron suppression layer (7), an emitting layer (8), a hole suppression layer (9), an electron injection and transport layer (12), and a cathode (4).
- the present invention provides a compound represented by the chemical formula 1.
- substituted or unsubstituted means substituted or unsubstituted with one or more substituents selected from the group consisting of deuterium; a halogen group; a cyano group; a nitro group; a hydroxy group; a carbonyl group; an ester group; an imide group; an amino group; a phosphine oxide group; an alkoxy group; an aryloxy group; an alkylthioxy group; an arylthioxy group; an alkylsulfoxy group; an arylsulfoxy group; a silyl group; a boron group; an alkyl group; a cycloalkyl group; an alkenyl group; an aryl group; an aralkyl group; an aralkenyl group; an alkylaryl group; an alkylamine group; an aralkylamine group; a heteroarylamine group; an arylamine group; an arylamine group; an ary
- a substituent having two or more substituents connected may be a biphenylyl group. That is, the biphenylyl group may also be an aryl group, and may be interpreted as a substituent having two phenyl groups connected.
- substituted or unsubstituted may be understood to mean “unsubstituted or substituted with one or more substituents selected from the group consisting of deuterium, halogen, cyano, C 1-10 alkyl, C 1-10 alkoxy, and C 6-20 aryl”; or “unsubstituted or substituted with one or more substituents selected from the group consisting of deuterium, halogen, cyano, methyl, ethyl, phenyl, and naphthyl.”
- substituted with one or more substituents may be understood to mean “substituted with 1 to the maximum number of substitutable hydrogens.”
- substituted with one or more substituents may be understood to mean “substituted with one to five substituents", or “substituted with one or two substituents.”
- the number of carbon atoms in the carbonyl group is not particularly limited, but is preferably 1 to 40 carbon atoms. Specifically, it may be a substituent having the following structure, but is not limited thereto.
- the ester group may have the oxygen of the ester group substituted with a straight-chain, branched-chain or cyclic alkyl group having 1 to 25 carbon atoms or an aryl group having 6 to 25 carbon atoms.
- the ester group may have a substituent of the following structural formula, but is not limited thereto.
- the number of carbon atoms in the imide group is not particularly limited, but is preferably 1 to 25 carbon atoms. Specifically, it may be a substituent having the following structure, but is not limited thereto.
- a substituted or unsubstituted silyl group means -Si(Z 1 )(Z 2 )(Z 3 ), wherein Z 1 , Z 2 and Z 3 can each independently be hydrogen, deuterium, a substituted or unsubstituted C 1-60 alkyl, a substituted or unsubstituted C 1-60 haloalkyl, a substituted or unsubstituted C 2-60 alkenyl, a substituted or unsubstituted C 2-60 haloalkenyl, or a substituted or unsubstituted C 6-60 aryl.
- Z 1 , Z 2 and Z 3 can each independently be hydrogen, deuterium, a substituted or unsubstituted C 1-10 alkyl, a substituted or unsubstituted C 1-10 haloalkyl, or a substituted or unsubstituted C 6-20 aryl.
- silyl group examples include, but are not limited to, a trimethylsilyl group, a triethylsilyl group, a t-butyldimethylsilyl group, a vinyldimethylsilyl group, a propyldimethylsilyl group, a triphenylsilyl group, a diphenylsilyl group, and a phenylsilyl group.
- the boron group specifically includes, but is not limited to, a trimethyl boron group, a triethyl boron group, a t-butyldimethyl boron group, a triphenyl boron group, a phenyl boron group, etc.
- halogen groups include fluoro, chloro, bromo, or iodo.
- the alkyl group may be linear or branched, and the number of carbon atoms is not particularly limited, but is preferably 1 to 40. According to one embodiment, the number of carbon atoms in the alkyl group is 1 to 20. According to another embodiment, the number of carbon atoms in the alkyl group is 1 to 10.
- alkyl group examples include methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1-ethylbutyl, pentyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, 1-ethyl-propyl, 1,1-dimethylpropyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl, n-heptyl, isohexyl, 1-methylhexyl, 2-methylhexyl, 3-methylhexyl, 4-methylhexyl, 5-methylhexyl,
- the alkenyl group may be linear or branched, and the carbon number 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 embodiment, the carbon number of the alkenyl group is 2 to 10. According to another embodiment, the carbon number of the alkenyl group is 2 to 6.
- Specific examples include, but are not limited to, 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, and styrenyl.
- the alicyclic group refers to a monovalent substituent derived from a saturated or unsaturated hydrocarbon ring compound that contains only carbon as a ring-forming atom and does not have aromaticity, and is understood to encompass both monocyclic and condensed polycyclic compounds.
- the alicyclic group has 3 to 60 carbon atoms.
- the alicyclic group has 3 to 30 carbon atoms.
- the alicyclic group has 3 to 20 carbon atoms.
- alicyclic groups include a monocyclic group such as a cycloalkyl group, a bridged hydrocarbon group, a spiro hydrocarbon group, a substituent derived from a hydrogenated derivative of an aromatic hydrocarbon compound, and the like.
- examples of the cycloalkyl group include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, 3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl, 3,4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl, cyclooctyl, and the like.
- hydrocarbon group spanning the bridge examples include, but are not limited to, bicyclo[1.1.0]butyl, bicyclo[2.2.1]heptyl, bicyclo[4.2.0]octa-1,3,5-trienyl, adamantyl, and decalinyl.
- examples of the spiro ring hydrocarbon group include, but are not limited to, spiro[3.4]octyl and spiro[5.5]undecanyl.
- a substituent derived from a hydrogenated derivative of the above aromatic hydrocarbon compound means a substituent derived from a compound in which hydrogen is added to a part of an unsaturated bond of a monocyclic or polycyclic aromatic hydrocarbon compound, and examples of such substituents include, but are not limited to, 1 H -indenyl, 2 H -indenyl, 4 H -indenyl, 2,3 -dihydro-1 H -indenyl, 1,4-dihydronaphthalenyl, 1,2,3,4-tetrahydronaphthalenyl, 6,7,8,9-tetrahydro-5 H -benzo[7]annulenyl, 6,7-dihydro-5 H -benzocycloheptenyl, and the like.
- an aryl group is understood to mean a substituent derived from a monocyclic or condensed polycyclic compound having aromaticity and containing only carbon as a ring-forming atom, and the carbon number is not particularly limited, but is preferably 6 to 60. According to one embodiment, the aryl group has 6 to 30 carbon atoms. According to one embodiment, the aryl group has 6 to 20 carbon atoms.
- the aryl group may be a monocyclic aryl group, such as a phenyl group, a biphenylyl group, or a terphenylyl group, but 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, or a fluorenyl group, but is not limited thereto.
- the fluorenyl group may be substituted, and two substituents may be combined with each other to form a spiro structure.
- the fluorenyl group is substituted, It can be, but is not limited to, the following.
- a heterocyclic group means a monovalent substituent derived from a monocyclic or condensed polycyclic compound further containing one or more heteroatoms selected from O, N, Si and S in addition to carbon as a ring-forming atom, and is understood to encompass both a substituent having aromaticity and a substituent not having aromaticity.
- the heterocyclic group has 2 to 60 carbon atoms.
- the heterocyclic group has 2 to 30 carbon atoms.
- the heterocyclic group has 2 to 20 carbon atoms. Examples of such heterocyclic groups include a heteroaryl group, a substituent derived from a hydrogenated derivative of a heteroaromatic compound, and the like.
- the heteroaryl group refers to a substituent derived from a monocyclic or condensed polycyclic compound which further includes at least one heteroatom selected from N, O and S in addition to carbon as a ring-forming atom, and refers to a substituent having aromaticity.
- the heteroaryl group has 2 to 60 carbon atoms.
- the heteroaryl group has 2 to 30 carbon atoms.
- the heteroaryl group has 2 to 20 carbon atoms.
- heteroaryl group examples include a thiophenyl group, a furanyl group, a pyrrolyl group, an imidazolyl group, a thiazolyl group, an oxazolyl group, an oxadiazolyl group, a triazolyl group, a pyridinyl group, a bipyridinyl group, a pyrimidinyl group, a triazinyl group, an acridinyl group, a pyridazinyl group, a pyrazinyl group, a quinolinyl group, a quinazolinyl group, a quinoxalinyl group, a phthalazinyl group, a pyridopyrimidinyl group, a pyridopyrazinyl group, an isoquinolinyl group, an indolyl group, a carbazolyl group, a benzoxazolyl group, a thi
- a substituent derived from a hydrogenated derivative of the heteroaromatic compound means a substituent derived from a compound in which hydrogen is added to a part of an unsaturated bond of a monocyclic or polycyclic heteroaromatic compound , and examples of such a substituent include, but are not limited to, 1,3-dihydroisobenzofuranyl, 2,3-dihydrobenzofuranyl, 1,3-dihydrobenzo[ c ]thiophenyl, 2,3 -dihydro[b ] thiophenyl, etc.
- the aryl group among the aralkyl group, the aralkenyl group, the alkylaryl group, the arylamine group, and the arylsilyl group is the same as the examples 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 examples of the alkyl group described above.
- the heteroaryl among the heteroarylamine may be applied with the description of the heteroaryl described above.
- the alkenyl group among the aralkenyl group is the same as the examples of the alkenyl group described above.
- the description of the aryl group described above may be applied with the exception that arylene is a divalent group.
- the description of the heteroaryl described above may be applied with the exception that heteroarylene is a divalent group.
- the description of the aryl group or the cycloalkyl group described above may be applied with the exception that the hydrocarbon ring is not a monovalent group but is formed by combining two substituents.
- the description of the heteroaryl described above may be applied, except that the heterocycle is not monovalent and is formed by combining two substituents.
- deuterated or deuterium substituted means that at least one of the substitutable hydrogens in the compound, divalent linking group or monovalent substituent is replaced with deuterium.
- unsubstituted or substituted with deuterium or “substituted or unsubstituted with deuterium” means “unsubstituted or substituted with 1 to 9 deuterium atoms”.
- the term “unsubstituted or substituted with deuterium phenanthryl” can be understood to mean “unsubstituted or substituted with 1 to 9 deuterium atoms", considering that the maximum number of hydrogen atoms that can be substituted with deuterium in the phenanthryl structure is 9.
- deuterated structure is meant to encompass compounds of all structures in which at least one hydrogen is replaced by a deuterium, a divalent linking group or a monovalent substituent.
- deuterated structure of phenyl can be understood to refer to monovalent substituents of all structures in which at least one substitutable hydrogen in the phenyl group is replaced by a deuterium, as follows.
- the "deuterium substitution rate” or “deuteration degree” of a compound means the ratio of the number of substituted deuteriums to the total number of hydrogens that can exist in the compound (the sum of the number of hydrogens replaceable with deuterium in the compound and the number of substituted deuteriums) calculated as a percentage. Therefore, when the "deuterium substitution rate” or “deuteration degree” of a compound is "K%,” it means that K% of the hydrogens replaceable with deuterium in the compound are replaced with deuterium.
- whether or not the compound is substituted with deuterium can be measured by a commonly known method, such as MALDI-TOF MS (Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometer), nuclear magnetic resonance spectroscopy ( 1 H NMR), TLC/MS (Thin-Layer Chromatography/Mass Spectrometry), or GC/MS (Gas Chromatography/Mass Spectrometry).
- MALDI-TOF MS Microx-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometer
- 1 H NMR nuclear magnetic resonance spectroscopy
- TLC/MS Thin-Layer Chromatography/Mass Spectrometry
- GC/MS Gas Chromatography/Mass Spectrometry
- the "deuterium substitution rate” or “deuteration degree” can be obtained by obtaining the number of substituted deuterium atoms in a compound through MALDI-TOF MS analysis, and then calculating the ratio of the number of substituted deuterium atoms to the total number of hydrogen atoms that may exist in the compound as a percentage.
- the "deuterium substitution rate” or “degree of deuteration” can be obtained by calculating the substitution rate based on the maximum value (max. value) of the distribution of molecular weights at the end of the reaction.
- the "deuterium substitution rate” or “degree of deuteration” can be calculated from the integration amount of the total peak using the integration ratio on 1 H NMR.
- the present invention provides a compound represented by the chemical formula 1.
- the compound of the above chemical formula 1 includes a carbazole bonded to a triazine at an ortho position, and the carbazole includes one or more deuteriums.
- the compound of the above chemical formula 1 has a structure in which dibenzofuran or dibenzothiophene is bonded to a benzene ring to which the triazine and the carbazole are bonded, but is bonded to carbon that is not at an ortho position with respect to the triazine.
- the inventors of the present invention have confirmed that in the case of a compound having a structure in which a carbazolyl group is substituted at the ortho position of a triazine with respect to a benzene ring, steric hindrance is induced so that the triazine moiety and the carbazole moiety have a distorted form, and in this structure, due to the electron donating characteristics of the carbazolyl group, the stability of the overall molecule increases, while the electron distribution is separated, so that the compound has additional CT (charge transfer) characteristics, and through this, an increase in the voltage and efficiency of a device employing the compound is induced, thereby completing the present invention.
- CT charge transfer
- the compound represented by the chemical formula 1 has a deuterium or aryl group instead of hydrogen in the carbazolyl group, and additionally includes dibenzofuranyl or dibenzothiophenyl in the benzene ring, and accordingly, the stability and electronic properties of the molecule of the compound represented by the chemical formula 1 can be maximized. Accordingly, the life characteristics of the organic light-emitting device employing the compound represented by the chemical formula 1 can be further improved.
- R 10 of the above chemical formula 1 is a bond with chemical formula 2, and R 9 and R 11 are each independently hydrogen or deuterium; or
- R 11 of the above chemical formula 1 is a bond with chemical formula 2, and R 9 and R 10 can each independently be hydrogen or deuterium.
- R 13 of the above chemical formula 2 is a bond with the above chemical formula 1, and R 14 , R 15 and R 16 are each independently hydrogen; deuterium; or substituted or unsubstituted C 6-60 aryl;
- R 14 is a bond with the above chemical formula 1, and R 13 , R 15 and R 16 are each independently hydrogen; deuterium; or substituted or unsubstituted C 6-60 aryl;
- R 15 of the above chemical formula 2 is a bond with the above chemical formula 1, and R 13 , R 14 and R 16 are each independently hydrogen; deuterium; or substituted or unsubstituted C 6-60 aryl; or
- R 16 of the above chemical formula 2 is a bond with the above chemical formula 1, and R 13 , R 14 and R 15 can each independently be hydrogen; deuterium; or substituted or unsubstituted C 6-60 aryl.
- the chemical formula 1 can be represented by any one of the following chemical formulas 1-1 to 1-6.
- Ar 1 , Ar 2 , X, and R 1 to R 20 are as defined in the chemical formula 1.
- R 1 to R 8 are each independently deuterium; or C 6-20 aryl substituted or unsubstituted with deuterium.
- R 1 to R 8 are each independently deuterium; or phenyl substituted with one or more deuterium atoms (preferably phenyl substituted with 5 deuterium atoms).
- R 1 to R 8 are each independently deuterium; or phenyl substituted with 5 deuterium atoms.
- R 1 to R 8 are all deuterium; or any one of R 1 to R 8 is C 6-12 aryl which is unsubstituted or substituted with deuterium, and the others can all be deuterium.
- R 1 to R 8 can be deuterium.
- any one of R 1 to R 8 can be phenyl substituted with one or more deuteriums, and the others can be deuteriums.
- Ar 1 and Ar 2 are each independently a substituted or unsubstituted C 6-20 aryl; or a C 2-20 heteroaryl comprising at least one heteroatom selected from the group consisting of substituted or unsubstituted N, O and S.
- Ar 1 and Ar 2 are each independently phenyl; phenyl substituted with one or more deuterium atoms; biphenylyl; or biphenylyl substituted with one or more deuterium atoms.
- Ar 1 and Ar 2 are each independently phenyl; or phenyl substituted with one or more deuterium atoms (preferably phenyl substituted with 5 deuterium atoms).
- Ar 1 and Ar 2 are each independently phenyl; or phenyl substituted with 1 5 deuterium atoms.
- R 9 to R 11 that are not bonded to chemical formula 2 are hydrogen.
- R 12 is hydrogen
- R 13 to R 16 not bonded to formula 1 and R 17 to R 20 are each independently hydrogen; deuterium; or substituted or unsubstituted C 6-20 aryl.
- R 13 to R 16 not bonded to formula 1 and R 17 to R 20 are each independently hydrogen; deuterium; phenyl; or phenyl substituted with one or more deuteriums.
- the remainder of R 13 to R 16 that is not bonded to formula 1 and R 17 to R 20 are all hydrogen; or all are deuterium; or the remainder of R 13 to R 16 that is not bonded to formula 1 and one of R 17 to R 20 are unsubstituted C 6-20 aryl and the remainder are all hydrogen; or the remainder of R 13 to R 16 that is not bonded to formula 1 and one of R 17 to R 20 are C 6-20 aryl in which all substitutable positions are substituted with deuterium and the remainder are all deuterium.
- the remainder of R 13 to R 16 that is not bonded to formula 1 and R 17 to R 20 are all hydrogen; or all are deuterium; the remainder of R 13 to R 16 that is not bonded to formula 1 and one of R 17 to R 20 are phenyl and the remainder are all hydrogen; or the remainder of R 13 to R 16 that is not bonded to formula 1 and one of R 17 to R 20 are phenyl substituted with 5 deuteriums and the remainder are all deuterium.
- the present invention provides a method for producing a compound represented by the chemical formula 1.
- a compound represented by Chemical Formula 1 can be prepared by a preparation method as shown in the following Reaction Scheme 1.
- the following Reaction Scheme 1 exemplifies a case where R 10 of Chemical Formula 1 is a bond with Chemical Formula 2, R 9 , R 11 , and R 12 are hydrogen, and the remainder of R 13 to R 16 that are not bonds with Chemical Formula 1 and R 17 to R 20 are all hydrogen:
- Ar 1 , Ar 2 , and X are as defined in Chemical Formulas 1 and 2, D is deuterium, n is an integer from 1 to 8, and X' is halogen.
- X' is each independently fluoro, chloro, or bromo.
- Step 1 of the above reaction scheme 1 is a Suzuki coupling reaction, which is preferably performed in the presence of a palladium catalyst and a base, and the reactor for the Suzuki coupling reaction can be changed as known in the art.
- Step 2 of the above reaction scheme 1 is an amine substitution reaction, which is preferably performed in the presence of a palladium catalyst and a base, and the reactor for the amine substitution reaction can be changed as known in the art.
- the present invention provides an organic light-emitting device comprising a compound represented by the chemical formula 1.
- the present invention provides an organic light-emitting device comprising a first electrode; a second electrode provided opposite the first electrode; and at least one organic layer provided between the first electrode and the second electrode, wherein at least one layer of the organic layers comprises a compound represented by the chemical formula 1.
- the organic layer of the organic light-emitting device of the present invention may be formed as a single-layer structure, but may be formed as a multilayer structure in which two or more organic layers are laminated.
- the organic light-emitting device of the present invention may have a structure including a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, etc. as the organic layers.
- the structure of the organic light-emitting device is not limited thereto and may include a smaller number of organic layers.
- the organic layer may include a light-emitting layer, and the light-emitting layer includes a compound represented by the chemical formula 1.
- the compound according to the present invention can be used as a host of the light-emitting layer.
- the organic layer may include a hole injection layer, a hole transport layer, or an electron suppression layer, and the hole injection layer, the hole transport layer, or the electron suppression layer includes a compound represented by the chemical formula 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 layers, and a cathode are sequentially laminated on a substrate.
- the organic light-emitting device according to the present invention may be an organic light-emitting device having a structure (inverted type) in which a cathode, one or more organic layers, and an anode are sequentially laminated on a substrate.
- the structure of an organic light-emitting device according to an embodiment of the present invention is exemplified in FIGS. 1 to 3.
- Figure 1 illustrates an example of an organic light-emitting device composed of a substrate (1), an anode (2), an organic layer (3), and a cathode (4).
- the compound represented by the chemical formula 1 may be included in the organic layer.
- FIG. 2 illustrates an example of an organic light-emitting device composed of a substrate (1), an anode (2), a hole injection layer (5), a hole transport layer (6), an electron suppression layer (7), an emitting layer (8), a hole suppression layer (9), an electron transport layer (10), an electron injection layer (11), and a cathode (4).
- the compound represented by the chemical formula 1 may be included in one or more layers of the hole injection layer, the hole transport layer, the electron suppression layer, the emitting layer, the hole suppression layer, the electron transport layer, and the electron injection layer, and for example, may be included in the emitting layer.
- FIG. 3 illustrates an example of an organic light-emitting device composed of a substrate (1), an anode (2), a hole injection layer (5), a hole transport layer (6), an electron suppression layer (7), an emitting layer (8), a hole suppression layer (9), an electron injection and transport layer (12), and a cathode (4).
- the compound represented by the chemical formula 1 may be included in one or more layers of the hole injection layer, the hole transport layer, the electron suppression layer, the emitting layer, the hole suppression layer, and the electron injection and transport layer, and for example, may be included in the emitting layer.
- the organic light-emitting device according to the present invention can be manufactured using materials and methods known in the art, except that at least one of the organic layers includes a compound represented by the chemical formula 1.
- the organic layers can be formed of the same material or different materials.
- the organic light-emitting device can be manufactured by sequentially stacking a first electrode, an organic layer, and a second electrode on a substrate.
- a PVD (physical vapor deposition) method such as sputtering or e-beam evaporation is used to deposit a metal or a conductive metal oxide or an alloy thereof on the substrate to form an anode, and then an organic layer including a hole injection layer, a hole transport layer, a light-emitting layer, and an electron transport layer is formed thereon, and then a material that can be used as a cathode is deposited thereon, thereby manufacturing the device.
- the organic light-emitting device can be manufactured by sequentially depositing a cathode material, an organic layer, and an anode material on the substrate.
- the compound represented by the above chemical formula 1 can be formed into an organic layer by a solution coating method as well as a vacuum deposition method when manufacturing an organic light-emitting device.
- the solution coating method means spin coating, dip coating, doctor blading, inkjet printing, screen printing, spraying, roll coating, etc., but is not limited thereto.
- an organic light-emitting device can be manufactured by sequentially depositing an organic layer and an anode material from a cathode material on a substrate (WO 2003/012890).
- the manufacturing method is not limited to this.
- the first electrode is an anode and the second electrode is a cathode, or the first electrode is a cathode and the second electrode is an anode.
- anode material a material having a high work function is generally preferred so that hole injection into the organic layer can be smooth.
- Specific examples of the above anode material include, but are not limited to, 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; and conductive polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDOT), polypyrrole, and polyaniline.
- 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
- the cathode material is preferably a material having a low work function to facilitate electron injection into the organic layer.
- Specific examples of the cathode material include, but are not limited to, metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, and lead, or alloys thereof; multilayered materials such as LiF/Al or LiO 2 /Al.
- the above hole injection layer is a layer that injects holes from the electrode
- the hole injection material is preferably a compound that has the ability to transport holes, has an excellent hole injection effect at the anode, an excellent hole injection effect for the light-emitting layer or the light-emitting material, prevents movement of excitons generated in the light-emitting layer to the electron injection layer or the electron injection material, and further has excellent thin film forming ability.
- the HOMO (highest occupied molecular orbital) of the hole injection material is between the work function of the anode material and the HOMO of the surrounding organic layer.
- hole injection material examples include, but are not limited to, metal porphyrin, oligothiophene, arylamine series organic compounds, hexanitrilehexaazatriphenylene series organic compounds, quinacridone series organic compounds, perylene series organic compounds, anthraquinone, and conductive polymers of polyaniline and polythiophene series.
- the above hole transport layer is a layer that receives holes from the hole injection layer and transports the holes to the light-emitting layer.
- a hole transport material that can transport holes from the anode or the hole injection layer and transfer them to the light-emitting layer is suitable, and a material having high mobility for holes is suitable. Specific examples include, but are not limited to, arylamine-based organic compounds, conductive polymers, and block copolymers having both conjugated and non-conjugated portions.
- the above electron suppression layer improves the efficiency of the organic light-emitting device by suppressing electrons injected from the cathode from being transferred to the anode without being recombined in the light-emitting layer.
- a material having a lower electron affinity than the electron transport layer is preferable for the electron suppression layer.
- the above-mentioned light-emitting material is a material that can emit light in the visible light range by transporting holes and electrons from the hole transport layer and the electron transport layer respectively and combining them, and a material having good quantum efficiency for fluorescence or phosphorescence is preferable.
- Specific examples include, but are not limited to, 8-hydroxy-quinoline aluminum complex (Alq 3 ); carbazole series compounds; dimerized styryl compounds; BAlq; 10-hydroxybenzo quinoline-metal compounds; benzoxazole, benzthiazole, and benzimidazole series compounds; poly(p-phenylenevinylene) (PPV) series polymers; spiro compounds; polyfluorene, rubrene, etc.
- PV poly(p-phenylenevinylene)
- the above-described light-emitting layer may include a host material and a dopant material.
- the host material may include a condensed aromatic ring derivative or a heterocycle-containing compound.
- the condensed aromatic ring derivative may include anthracene derivatives, pyrene derivatives, naphthalene derivatives, pentacene derivatives, phenanthrene compounds, fluoranthene compounds, and the like
- the heterocycle-containing compounds may include, but are not limited to, carbazole derivatives, dibenzofuran derivatives, ladder-type furan compounds, pyrimidine derivatives, and the like.
- the compound represented by the above-described chemical formula 1 may be used as a host material of the light-emitting layer, and in this case, low voltage, high efficiency, and/or long lifespan characteristics of the organic light-emitting device may be obtained.
- Dopant materials include aromatic amine derivatives, styrylamine compounds, boron complexes, fluoranthene compounds, metal complexes, etc.
- aromatic amine derivatives are condensed aromatic ring derivatives having a substituted or unsubstituted arylamino group, such as pyrene, anthracene, chrysene, periflanthene, etc.
- styrylamine compounds are compounds in which at least one arylvinyl group is substituted in a substituted or unsubstituted arylamine, and one or more substituents selected from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group, and an arylamino group are substituted or unsubstituted.
- substituents selected from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group, and an arylamino group are substituted or unsubstituted.
- styrylamine, styryldiamine, styryltriamine, styryltetraamine, etc. but are not limited thereto.
- metal complexes include iridium complexes, platinum complexes, etc., but are not limited thereto.
- the above electron transport layer is a layer that receives electrons from the electron injection layer and transports them to the light-emitting layer.
- the electron transport material a material that can well receive electrons from the cathode and transfer them to the light-emitting layer is suitable.
- a material having high electron mobility is suitable. Specific examples include, but are not limited to, an Al complex of 8-hydroxyquinoline; a complex including Alq 3 ; an organic radical compound; and a hydroxyflavone-metal complex.
- 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 having a low work function and followed by an aluminum layer or a silver layer. Specific examples include cesium, barium, calcium, ytterbium and samarium, and in each case followed by an aluminum layer or a silver layer.
- the above electron injection layer is a layer that injects electrons from an electrode, has the ability to transport electrons, has an excellent electron injection effect for an electron injection effect from a cathode, an excellent electron injection effect for a light-emitting layer or a light-emitting material, prevents movement of excitons generated in the light-emitting layer to a hole injection layer, and further, a compound having excellent thin-film forming ability is preferable.
- fluorenone anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, fluorenylidene methane, anthrone, and the like, derivatives thereof, metal complex compounds, and nitrogen-containing 5-membered ring derivatives.
- 8-hydroxyquinolinato lithium 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., but are not limited thereto.
- the electron transport material and the electron injection material can be simultaneously deposited to manufacture a single layer of electron injection and transport layers.
- the above hole suppression layer prevents holes injected from the anode from being recombined in the light-emitting layer and from passing to the electron transport layer, and a material having a high ionization energy is preferable for the hole suppression layer.
- the organic light-emitting device may be a front-emitting type, a back-emitting type, or a double-sided emitting type depending on the material used.
- the compound represented by the above chemical formula 1 can be included in an organic solar cell or an organic transistor in addition to an organic light-emitting device.
- sub1-1 50 g, 149.7 mmol
- bis(pinacolato)diboron 38.4 g, 164.7 mmol
- potassium acetate 43.2 g, 449.1 mmol
- palladium dibenzylidene acetone palladium 2.6 g, 4.5 mmol
- tricyclohexylphosphine 2.5 g, 9 mmol
- a glass substrate coated with a 100 nm thick ITO (indium tin oxide) film was placed in distilled water containing a detergent and cleaned using ultrasonic waves.
- the detergent used was a Fischer Co. product, and the distilled water used was distilled water that had been filtered twice through a Millipore Co. filter. After washing the ITO for 30 minutes, ultrasonic cleaning was performed twice with distilled water for 10 minutes. After the distilled water washing was complete, ultrasonic cleaning was performed with a solvent of isopropyl alcohol, acetone, and methanol, and after drying, the substrate was transported to a plasma cleaner. In addition, the substrate was cleaned for 5 minutes using oxygen plasma and then transported to a vacuum deposition device.
- the compound HI-A below was thermally vacuum deposited to a thickness of 60 nm on the ITO transparent electrode prepared in this manner to form a hole injection layer.
- a first hole transport layer having a thickness of 5 nm was formed by vacuum depositing the compound HAT below on the hole injection layer, and a second hole transport layer having a thickness of 50 nm was formed by vacuum depositing the compound HT-A below on the first hole transport layer.
- the following compound HT-B was thermally vacuum deposited to a thickness of 45 nm to form an electron blocking layer.
- the previously manufactured compound GH1 was mixed with the following compound GH-H at a weight ratio of 1:1, and then vacuum deposited with the following compound GD at a weight ratio of 90:10 to a thickness of 40 nm to form a light-emitting layer.
- the compound ET-A below was vacuum-deposited to a thickness of 5 nm to form a hole-blocking layer.
- the following compound ET-B and the following compound LiQ were vacuum-deposited at a weight ratio of 1:1 to form an electron injection and transport layer with a thickness of 35 nm.
- lithium fluoride LiF
- aluminum was then deposited with a thickness of 100 nm to form a cathode, thereby manufacturing an organic light-emitting device.
- the deposition rate of the organic material was maintained at 0.04 nm/sec to 0.09 nm/sec, the deposition rate of lithium fluoride was maintained at 0.03 nm/sec, and the deposition rate of aluminum was maintained at 0.2 nm/sec.
- the vacuum during deposition was maintained at 1*10 -7 torr to 5*10 -5 torr.
- the organic light-emitting device of the example manufactured using the compound according to the present invention as a host of the light-emitting layer exhibits superior performance in terms of voltage, efficiency, and/or lifespan compared to the organic light-emitting device of the comparative example.
- the organic light-emitting device of the above example exhibits lower operating voltage, higher efficiency, and significantly improved lifespan characteristics compared to the organic light-emitting device of Comparative Example 4 employing Comparative Compound GH-D.
- the compound represented by Chemical Formula 1 which exhibits additional CT (charge transfer) characteristics because the triazine moiety and the carbazole moiety have a twisted form with respect to the benzene ring to induce steric hindrance, can improve the device characteristics, whereas the Comparative Compound GH-D does not exhibit CT characteristics because the carbazolyl group is present at the meta position of the triazine, so steric hindrance cannot be induced, and thus does not contribute to the improvement of the device characteristics.
- CT charge transfer
- the organic light-emitting device of the above example exhibits significantly improved lifespan characteristics compared to the organic light-emitting devices of Comparative Examples 1 and 2, which employed comparative compounds GH-A and GH-B, respectively. It is judged that this is because the stability of the molecules was reduced in the case of comparative compounds GH-A and GH-B due to the electron deficiency phenomenon of the carbazole moiety, and accordingly, it is confirmed that the compound represented by the above chemical formula 1 has improved molecular stability by having deuterium in the carbazole moiety, unlike comparative compounds GH-A and GH-B.
- the electron donating characteristic of the dibenzofuranyl/dibenzothiophenyl group directly affects the carbazolyl group, so that the electron deficiency phenomenon of the carbazolyl group may become more severe.
- the increase in the lifespan characteristics of a device employing the compound may not be large due to the instability of the hydrogen atoms present in the carbazolyl group. This can be confirmed by comparing the lifespan data of the organic light-emitting device of the example with the lifespan data of the organic light-emitting device employing the comparative compound GH-E.
- Substrate 2 Anode
- Electron suppression layer 8 Emitting layer
- Electron injection layer 12 Electron injection and transport layer
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Abstract
Description
| 구분 | 발광층 화합물 |
전압(V) (@10mA/cm2) |
효율(cd/A) (@10mA/cm2) |
발광색 | T95(hr) (@20mA/cm2) |
| 실시예 1 | GH1 | 3.51 | 90.4 | 녹색 | 160 |
| 실시예 2 | GH2 | 3.44 | 89.1 | 녹색 | 180 |
| 실시예 3 | GH3 | 3.55 | 91.7 | 녹색 | 155 |
| 실시예 4 | GH4 | 3.47 | 90.5 | 녹색 | 160 |
| 실시예 5 | GH5 | 3.64 | 91.4 | 녹색 | 175 |
| 실시예 6 | GH6 | 3.48 | 93.2 | 녹색 | 170 |
| 실시예 7 | GH7 | 3.51 | 93.5 | 녹색 | 180 |
| 실시예 8 | GH8 | 3.46 | 88.8 | 녹색 | 155 |
| 실시예 9 | GH9 | 3.49 | 89.1 | 녹색 | 175 |
| 실시예 10 | GH10 | 3.57 | 92.2 | 녹색 | 175 |
| 비교예 1 | GH-A | 3.46 | 89.3 | 녹색 | 90 |
| 비교예 2 | GH-B | 3.47 | 93.2 | 녹색 | 95 |
| 비교예 3 | GH-C | 3.87 | 75.4 | 녹색 | 110 |
| 비교예 4 | GH-D | 3.75 | 71.8 | 녹색 | 105 |
| 비교예 5 | GH-E | 3.51 | 88.9 | 녹색 | 130 |
Claims (11)
- 하기 화학식 1로 표시되는 화합물:[화학식 1]상기 화학식 1에서,Ar1 및 Ar2는 각각 독립적으로 치환 또는 비치환된 C6-60 아릴; 또는 치환 또는 비치환된 N, O 및 S로 구성되는 군으로부터 선택되는 어느 하나 이상의 헤테로원자를 포함하는 C2-60 헤테로아릴이고,R1 내지 R8은 각각 독립적으로 중수소; 또는 치환 또는 비치환된 C6-60 아릴이고, 단, R1 내지 R8 중 적어도 하나는 중수소이고,R9 내지 R11 중 어느 하나는 하기 화학식 2와의 결합이고, 나머지는 각각독립적으로 수소 또는 중수소이고,R12는 수소 또는 중수소이고,[화학식 2]상기 화학식 2에서,X는 O 또는 S이고,R13 내지 R16 중 어느 하나는 상기 화학식 1과의 결합이고, 나머지는 각각 독립적으로 수소; 중수소; 또는 치환 또는 비치환된 C6-60 아릴이고,R17 내지 R20은 각각 독립적으로 수소; 중수소; 또는 치환 또는 비치환된 C6-60 아릴이다.
- 제1항에 있어서,R1 내지 R8은 각각 독립적으로, 중수소; 또는 1개 이상의 중수소로 치환된 페닐인,화합물.
- 제1항에 있어서,Ar1 및 Ar2는 각각 독립적으로 페닐; 1개 이상의 중수소로 치환된 페닐; 비페닐릴; 또는 1개 이상의 중수소로 치환된 비페닐릴인,화합물.
- 제1항에 있어서,R9 내지 R11 중 화학식 2와 결합하지 않은 나머지는 모두 수소인,화합물.
- 제1항에 있어서,R12는 수소인,화합물.
- 제1항에 있어서,R13 내지 R16 중 화학식 1과 결합하지 않은 나머지 및 R17 내지 R20은 각각 독립적으로 수소; 중수소; 페닐; 또는 1개 이상의 중수소로 치환된 페닐인,화합물.
- 제1항에 있어서,R13 내지 R16 중 화학식 1과 결합하지 않은 나머지 및 R17 내지 R20이 모두 수소이거나; 모두 중수소이거나; R13 내지 R16 중 화학식 1과 결합하지 않은 나머지 및 R17 내지 R20 중 하나가 페닐이고 나머지는 모두 수소이거나; 또는 R13 내지 R16 중 화학식 1과 결합하지 않은 나머지 및 R17 내지 R20 중 하나가 5개의 중수소로 치환된 페닐이고 나머지는 모두 중수소인,화합물.
- 제1 전극; 상기 제1 전극과 대향하여 구비된 제2 전극; 및 상기 제1 전극과 상기 제2 전극 사이에 구비된 1층 이상의 유기물층을 포함하는 유기 발광 소자로서, 상기 유기물층 중 1층 이상은 제1항 내지 제9항 중 어느 하나의 항에 따른 화합물을 포함하는 것인, 유기 발광 소자.
- 제10항에 있어서,상기 화합물을 포함하는 유기물층은 발광층인, 유기 발광 소자.
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| WO2020032424A1 (ko) * | 2018-08-09 | 2020-02-13 | 덕산네오룩스 주식회사 | 이종 화합물의 혼합물을 호스트로 포함하는 유기전기소자 및 그 전자 장치 |
| KR20200083171A (ko) * | 2018-12-28 | 2020-07-08 | 삼성전자주식회사 | 유기 발광 소자 및 이를 포함하는 장치 |
| US20200331898A1 (en) * | 2017-10-30 | 2020-10-22 | Cynora Gmbh | Organic molecules for use in optoelectronic devices |
| KR20210067976A (ko) * | 2019-11-29 | 2021-06-08 | 주식회사 엘지화학 | 유기 발광 소자 |
| WO2022031033A1 (ko) * | 2020-08-04 | 2022-02-10 | 주식회사 엘지화학 | 유기 발광 소자 |
| WO2023200282A1 (ko) * | 2022-04-15 | 2023-10-19 | 주식회사 엘지화학 | 신규한 화합물 및 이를 이용한 유기 발광 소자 |
Family Cites Families (1)
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|---|---|---|---|---|
| KR100430549B1 (ko) | 1999-01-27 | 2004-05-10 | 주식회사 엘지화학 | 신규한 착물 및 그의 제조 방법과 이를 이용한 유기 발광 소자 및 그의 제조 방법 |
-
2024
- 2024-02-08 CN CN202480002313.2A patent/CN119095841A/zh active Pending
- 2024-02-08 US US18/865,994 patent/US20250318428A1/en active Pending
- 2024-02-08 WO PCT/KR2024/001891 patent/WO2024167337A1/ko not_active Ceased
- 2024-02-08 KR KR1020240019528A patent/KR20240124825A/ko active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200331898A1 (en) * | 2017-10-30 | 2020-10-22 | Cynora Gmbh | Organic molecules for use in optoelectronic devices |
| WO2020032424A1 (ko) * | 2018-08-09 | 2020-02-13 | 덕산네오룩스 주식회사 | 이종 화합물의 혼합물을 호스트로 포함하는 유기전기소자 및 그 전자 장치 |
| KR20200083171A (ko) * | 2018-12-28 | 2020-07-08 | 삼성전자주식회사 | 유기 발광 소자 및 이를 포함하는 장치 |
| KR20210067976A (ko) * | 2019-11-29 | 2021-06-08 | 주식회사 엘지화학 | 유기 발광 소자 |
| WO2022031033A1 (ko) * | 2020-08-04 | 2022-02-10 | 주식회사 엘지화학 | 유기 발광 소자 |
| WO2023200282A1 (ko) * | 2022-04-15 | 2023-10-19 | 주식회사 엘지화학 | 신규한 화합물 및 이를 이용한 유기 발광 소자 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20250318428A1 (en) | 2025-10-09 |
| CN119095841A (zh) | 2024-12-06 |
| KR20240124825A (ko) | 2024-08-19 |
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