WO2015159541A1 - テトラアザトリフェニレン環構造を有する化合物、発光材料および有機エレクトロルミネッセンス素子 - Google Patents
テトラアザトリフェニレン環構造を有する化合物、発光材料および有機エレクトロルミネッセンス素子 Download PDFInfo
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- WO2015159541A1 WO2015159541A1 PCT/JP2015/002077 JP2015002077W WO2015159541A1 WO 2015159541 A1 WO2015159541 A1 WO 2015159541A1 JP 2015002077 W JP2015002077 W JP 2015002077W WO 2015159541 A1 WO2015159541 A1 WO 2015159541A1
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- PIDFDZJZLOTZTM-KHVQSSSXSA-N ombitasvir Chemical compound COC(=O)N[C@@H](C(C)C)C(=O)N1CCC[C@H]1C(=O)NC1=CC=C([C@H]2N([C@@H](CC2)C=2C=CC(NC(=O)[C@H]3N(CCC3)C(=O)[C@@H](NC(=O)OC)C(C)C)=CC=2)C=2C=CC(=CC=2)C(C)(C)C)C=C1 PIDFDZJZLOTZTM-KHVQSSSXSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000004866 oxadiazoles Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- XEXYATIPBLUGSF-UHFFFAOYSA-N phenanthro[9,10-b]pyridine-2,3,4,5,6,7-hexacarbonitrile Chemical group N1=C(C#N)C(C#N)=C(C#N)C2=C(C(C#N)=C(C(C#N)=C3)C#N)C3=C(C=CC=C3)C3=C21 XEXYATIPBLUGSF-UHFFFAOYSA-N 0.000 description 1
- 150000005041 phenanthrolines Chemical class 0.000 description 1
- 125000004625 phenanthrolinyl group Chemical group N1=C(C=CC2=CC=C3C=CC=NC3=C12)* 0.000 description 1
- 125000004557 phenoxazin-10-yl group Chemical group C1=CC=CC=2OC3=CC=CC=C3N(C12)* 0.000 description 1
- DHHVAGZRUROJKS-UHFFFAOYSA-N phentermine Chemical compound CC(C)(N)CC1=CC=CC=C1 DHHVAGZRUROJKS-UHFFFAOYSA-N 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003220 pyrenes Chemical class 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical class [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- YYMBJDOZVAITBP-UHFFFAOYSA-N rubrene Chemical compound C1=CC=CC=C1C(C1=C(C=2C=CC=CC=2)C2=CC=CC=C2C(C=2C=CC=CC=2)=C11)=C(C=CC=C2)C2=C1C1=CC=CC=C1 YYMBJDOZVAITBP-UHFFFAOYSA-N 0.000 description 1
- 150000003967 siloles Chemical class 0.000 description 1
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 description 1
- KSAVQLQVUXSOCR-UHFFFAOYSA-M sodium lauroyl sarcosinate Chemical compound [Na+].CCCCCCCCCCCC(=O)N(C)CC([O-])=O KSAVQLQVUXSOCR-UHFFFAOYSA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 150000004867 thiadiazoles Chemical class 0.000 description 1
- 150000007979 thiazole derivatives Chemical class 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 1
- 125000005259 triarylamine group Chemical group 0.000 description 1
Images
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- 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
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/12—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains three hetero rings
- C07D471/14—Ortho-condensed systems
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
- H10K85/636—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
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- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
- C09K2211/1025—Heterocyclic compounds characterised by ligands
- C09K2211/1044—Heterocyclic compounds characterised by ligands containing two nitrogen atoms as heteroatoms
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- 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
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- H10K50/14—Carrier transporting layers
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- H10K50/18—Carrier blocking layers
Definitions
- the present invention relates to a compound suitable for an organic electroluminescence element which is a self-luminous element suitable for various display devices and the element, and more specifically, a compound having a tetraazatriphenylene ring structure, and a light emitting material comprising the compound And an organic electroluminescence device using the compound.
- organic electroluminescent elements are self-luminous elements, they have been actively researched because they are brighter and have better visibility than liquid crystal elements and can be clearly displayed.
- an organic electroluminescence element In an organic electroluminescence element (hereinafter abbreviated as an organic EL element), carriers are injected into a luminescent material from both positive and negative electrodes to generate an excited luminescent material and emit light.
- an organic EL element In general, in the case of a carrier injection type organic EL device, 25% of the generated excitons are excited to the excited singlet state, and the remaining 75% are said to be excited to the excited triplet state. Yes. Therefore, it is considered that the use efficiency of energy is higher when phosphorescence, which is light emission from an excited triplet state, is used. However, phosphorescence generally has a high quantum yield because the excited triplet state has a long lifetime, which results in saturation of the excited state and energy deactivation due to interaction with excitons in the excited triplet state. .
- an organic EL element using a material exhibiting delayed fluorescence is conceivable.
- the latter material exhibiting thermally activated delayed fluorescence is considered to be particularly useful.
- excitons in the excited singlet state emit fluorescence as usual.
- excitons in the excited triplet state absorb heat generated by the device, cross the system into excited singlets, and emit fluorescence.
- the light is emitted from the excited singlet, it is emitted at the same wavelength as the fluorescence, but the lifetime of light generated by the cross-system crossing from the excited triplet state to the excited singlet state, that is, the emission lifetime is usually Since the fluorescence becomes longer than the fluorescence and phosphorescence, it is observed as fluorescence delayed from these. This can be defined as delayed fluorescence.
- the ratio of the compound in an excited singlet state, which normally generated only 25% is 25%. It becomes possible to raise it to the above.
- a compound having a tetraazatriphenylene structure represented by the following general formula (X) has been proposed as an electron transport material (see, for example, Patent Document 3).
- An object of the present invention is to provide a compound that emits fluorescence and delayed fluorescence as a material for a high-efficiency organic EL element, and further, using this compound, an organic photoluminescence element (hereinafter abbreviated as an organic PL element). ) And an organic EL element with high efficiency and high brightness.
- an organic photoluminescence element hereinafter abbreviated as an organic PL element.
- the present inventors have added a heterocyclic structure such as a carbazole ring, a phenoxazine ring and an acridan ring to a tetraazatriphenylene ring structure and / or a diarylamino group structure such as a diphenylamino group. Focusing on the compound that has it, the compound is designed and chemically synthesized using the difference between the excited triplet energy and the excited singlet energy ( ⁇ E ST ) and the oscillator strength (f) obtained from the theoretical calculation as an index. ) A compound having a novel tetraazatriphenylene ring structure that emits delayed fluorescence was found by measuring the spectrum. And as a result of making various organic EL elements using the compound as prototypes and intensively evaluating the characteristics of the elements, the present invention has been completed.
- the present invention is a compound having a tetraazatriphenylene ring structure represented by the following general formula (1).
- X represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, or an aromatic hydrocarbon group, aromatic heterocyclic group;
- Y has a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, and a substituent.
- this invention is a compound which has the tetraazatriphenylene ring structure of said 1) description represented by the following general formula (1a).
- X represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, or an aromatic hydrocarbon group, aromatic heterocyclic group;
- Y has a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, and a substituent.
- a cycloalkyl group having 5 to 10 carbon atoms which may have a group, a linear or branched alken
- the present invention is a compound having a tetraazatriphenylene ring structure described in the above 1) represented by the following general formula (1a-1).
- X represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, or an aromatic hydrocarbon group, aromatic heterocyclic group;
- Y has a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, and a substituent.
- a cycloalkyl group having 5 to 10 carbon atoms which may have a group, a linear or branched alken
- the present invention is also a compound having a tetraazatriphenylene ring structure described in 1) above, represented by the following general formula (1a-2).
- X represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, or an aromatic hydrocarbon group, aromatic heterocyclic group;
- Y has a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, and a substituent.
- a cycloalkyl group having 5 to 10 carbon atoms which may have a group, a linear or branched alken
- the present invention is a compound having a tetraazatriphenylene ring structure described in 1) above, which is represented by the following general formula (1a-3).
- X represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, or an aromatic hydrocarbon group, aromatic heterocyclic group;
- Y has a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, and a substituent.
- a cycloalkyl group having 5 to 10 carbon atoms which may have a group, a linear or branched alken
- the present invention is a compound having a tetraazatriphenylene ring structure described in the above 1) represented by the following general formula (1a-4).
- X represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted condensed polycyclic aromatic group, or an aromatic hydrocarbon group, aromatic heterocyclic group;
- Y has a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a nitro group, and a substituent.
- a cycloalkyl group having 5 to 10 carbon atoms which may have a group, a linear or branched alken
- X and Y may be the same or different from each other, and the substituted or unsubstituted carbazolyl group, phenoxazinyl group, phenothiazinyl group, acridinyl group, phenazinyl group, or The compound having a tetraazatriphenylene ring structure as described in 1) above, which is a group selected from an aromatic hydrocarbon group or a disubstituted amino group substituted with a condensed polycyclic aromatic group.
- the present invention is a light emitting material comprising the compound having a tetraazatriphenylene ring structure described in 1) above.
- the present invention also provides the luminescent material according to 8) above, which emits thermally activated delayed fluorescence.
- the compound having a tetraazatriphenylene ring structure described in 1) above is formed of at least one organic layer. It is an organic electroluminescent element characterized by being used as a constituent material.
- this invention is an organic electroluminescent element of the said 10) description whose above described organic layer is a light emitting layer.
- the present invention is the organic electroluminescence device according to 11) above, which emits delayed fluorescence.
- this invention is an organic electroluminescent element of the said 10) description whose above described organic layer is an electron carrying layer.
- this invention is an organic electroluminescent element of said 10) description whose said organic layer is a hole-blocking layer.
- aromatic hydrocarbon group “aromatic heterocyclic group” or “fused polycyclic aromatic group”
- phenyl group, biphenylyl group, terphenylyl group, naphthyl group, anthracenyl group, phenanthrenyl group Fluorenyl, indenyl, pyrenyl, perylenyl, fluoranthenyl, triphenylenyl, pyridyl, pyrimidinyl, triazinyl, furyl, pyrrolyl, thienyl, quinolyl, isoquinolyl, benzofuranyl, benzothienyl Group, indolyl group, carbazolyl group, be
- substituted aromatic hydrocarbon group “substituted aromatic heterocyclic group” or “substituted condensed polycyclic aromatic group” represented by X in the general formula (1), specifically, , Deuterium atom, cyano group, nitro group; halogen atom such as fluorine atom, chlorine atom, bromine atom, iodine atom; methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert A linear or branched alkyl group having 1 to 6 carbon atoms such as a butyl group, an n-pentyl group, an isopentyl group, a neopentyl group, or an n-hexyl group; a methyloxy group, an ethyloxy group, a propyloxy group, or the like; A linear or branched alkyl group having 1 to 6 carbon atoms such as a
- the “group”, “aromatic heterocyclic group” or “fused polycyclic aromatic group”, the “substituted or unsubstituted aromatic hydrocarbon group” represented by X in the general formula (1) “Aromatic hydrocarbon group”, “aromatic heterocyclic group” or “fused polycyclic aromatic group” in “substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted condensed polycyclic aromatic group” The same groups as those shown for can be mentioned.
- these groups may have a substituent, and as the substituent, a “substituted aromatic hydrocarbon group” or a “substituted aromatic heterocyclic group” represented by X in the general formula (1) above. ”Or the“ substituent ”of the“ substituted condensed polycyclic aromatic group ”can be exemplified, and the possible embodiments can also be exemplified.
- X in the general formula (1) is “substituted or unsubstituted aromatic heterocyclic group”, “substituted or unsubstituted condensed polycyclic aromatic group” or “aromatic hydrocarbon group, or condensed polycyclic aromatic group”. It is preferably a “disubstituted amino group substituted by a group selected from an aromatic group”, and “a substituted or unsubstituted aromatic heterocyclic group” or “a disubstituted amino group substituted by an aromatic hydrocarbon group”. More preferred are carbazolyl group, phenoxazinyl group, phenothiazinyl group, acridinyl group, phenazinyl group and diphenylamino group.
- the acridinyl group and the phenazinyl group are preferably a 9,9-dimethyl-9,10-dihydroacridinyl group and a 10-phenylphenazinyl group.
- the di-substituted amino group substituted by the carbazolyl group and the aromatic hydrocarbon group is preferable, and the carbazolyl group and the diphenylamino group are more preferable.
- a linear or branched alkyl group having 1 to 6 carbon atoms which may have a substituent represented by Y in the general formula (1), “may have a substituent "C1-C6 straight chain” in "C5-C10 cycloalkyl group” or "C2-C6 linear or branched alkenyl group which may have a substituent”
- Specific examples of the “straight or branched alkyl group”, “cycloalkyl group having 5 to 10 carbon atoms” or “linear or branched alkenyl group having 2 to 6 carbon atoms” include a methyl group, Ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group, cyclopentyl group, cyclohexyl , 1-adamanty
- a linear or branched alkyl group having 1 to 6 carbon atoms having a substituent represented by Y in the general formula (1), “a cycloalkyl group having 5 to 10 carbon atoms having a substituent”
- a substituent specifically, deuterium atom, cyano group, nitro group; fluorine atom, chlorine Halogen atoms such as atoms, bromine atoms and iodine atoms; linear or branched alkyloxy groups having 1 to 6 carbon atoms such as methyloxy groups, ethyloxy groups and propyloxy groups; alkenyl groups such as vinyl groups and allyl groups Groups; aryloxy groups such as phenyloxy group and tolyloxy group; arylalkyloxy groups such as benzyloxy group and phenethyloxy group; Aromatic hydrocarbon groups or
- substituents may further the exemplified substituents may be substituted. These substituents may be bonded to each other via a single bond, a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.
- the “linear or branched alkyloxy group having 1 to 6 carbon atoms” or the “cycloalkyloxy group having 5 to 10 carbon atoms” in the “good cycloalkyloxy group having 5 to 10 carbon atoms” includes: Specifically, methyloxy group, ethyloxy group, n-propyloxy group, isopropyloxy group, n-butyloxy group, tert-butyloxy group, n-pentyloxy group, n-hexyloxy group, cyclopentyloxy group, cyclohexyloxy group Cycloheptyloxy group, cyclooctyloxy group, 1-adamantyloxy group, 2-adamantyloxy group, etc. Rukoto can. These groups may be bonded to each other through
- a linear or branched alkyloxy group having 1 to 6 carbon atoms having a substituent represented by Y in the general formula (1) or “cycloalkyl having 5 to 10 carbon atoms having a substituent”
- substituents in “oxy group” include deuterium atom, cyano group, nitro group; halogen atom such as fluorine atom, chlorine atom, bromine atom, iodine atom; methyloxy group, ethyloxy group, propyloxy
- Arylalkyloxy groups such as phenyl group, biphenylyl group, terphenylyl group, naph
- aromatic hydrocarbon group aromatic heterocyclic group
- aromatic heterocyclic group or “fused polycyclic aromatic group” in the above
- substituted or unsubstituted aromatic group represented by X in the above general formula (1) "Aromatic hydrocarbon group", “substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted condensed polycyclic aromatic group” in “aromatic hydrocarbon group”, “aromatic heterocyclic group” or " Examples thereof include the same groups as those shown for the “fused polycyclic aromatic group”.
- these groups may have a substituent, and as the substituent, a “substituted aromatic hydrocarbon group” or a “substituted aromatic heterocyclic group” represented by X in the general formula (1) above. ”Or the“ substituent ”of the“ substituted condensed polycyclic aromatic group ”can be exemplified, and the possible embodiments can also be exemplified.
- aryloxy group in the “substituted or unsubstituted aryloxy group” represented by Y in the general formula (1), specifically, a phenyloxy group, a biphenylyloxy group, a terphenylyloxy group, Examples include naphthyloxy group, anthracenyloxy group, phenanthrenyloxy group, fluorenyloxy group, indenyloxy group, pyrenyloxy group, perylenyloxy group, and the like.
- substituted aryloxy group represented by Y in formula (1)
- substituents in the “substituted aryloxy group” represented by Y in formula (1) include deuterium atom, trifluoromethyl group, cyano group, nitro group; fluorine atom, chlorine atom Halogen atoms such as bromine atom and iodine atom; methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n A linear or branched alkyl group having 1 to 6 carbon atoms such as a hexyl group; a linear or branched alkyloxy having 1 to 6 carbon atoms such as a methyloxy group, an ethyloxy group or a propyloxy group
- An alkenyl group such as a
- Aromatic hydrocarbon in “disubstituted amino group substituted by a group selected from aromatic hydrocarbon group, aromatic heterocyclic group or condensed polycyclic aromatic group” represented by Y in general formula (1)
- group aromatic heterocyclic group or “fused polycyclic aromatic group”
- substituted or unsubstituted aromatic hydrocarbon group represented by X in the general formula (1)
- “Aromatic hydrocarbon group”, “aromatic heterocyclic group” or “fused polycyclic aromatic group” in “substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted condensed polycyclic aromatic group” The same groups as those shown for can be mentioned.
- these groups may have a substituent, and as the substituent, a “substituted aromatic hydrocarbon group” or a “substituted aromatic heterocyclic group” represented by X in the general formula (1) above. ”Or the“ substituent ”of the“ substituted condensed polycyclic aromatic group ”can be exemplified, and the possible embodiments can also be exemplified.
- Y in the general formula (1) is preferably “substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted condensed polycyclic aromatic group”, and “substituted or unsubstituted aromatic group”.
- the heterocyclic group is more preferably a phenoxazinyl group, a phenothiazinyl group, an acridinyl group, a phenazinyl group, or a disubstituted amino group substituted with an aromatic hydrocarbon group or a condensed polycyclic aromatic group.
- the acridinyl group and the phenazinyl group are preferably a 9,9-dimethyl-9,10-dihydroacridinyl group and a 10-phenylphenazinyl group.
- the di-substituted amino group substituted by the carbazolyl group and the aromatic hydrocarbon group is preferable, and the carbazolyl group and the diphenylamino group are more preferable.
- a linear or branched alkyl group having 1 to 6 carbon atoms which may have a substituent represented by R 1 to R 8 in the general formula (1), “having a substituent In the “cycloalkyl group having 5 to 10 carbon atoms” or “straight or branched alkenyl group having 2 to 6 carbon atoms which may have a substituent”.
- Examples of “straight or branched alkyl group of 6”, “cycloalkyl group of 5 to 10 carbon atoms” or “straight chain or branched alkenyl group of 2 to 6 carbon atoms” specifically include , Methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group, cyclopentyl group, cyclo Hexyl group, 1-adamantyl, 2-adamantyl, vinyl group, allyl group, isopropenyl group, and the like 2-butenyl group.
- These groups may be bonded to each other through a single bond, a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.
- a linear or branched alkyl group having 1 to 6 carbon atoms having a substituent represented by R 1 to R 8 in formula (1), “5 to 10 carbon atoms having a substituent”
- Specific examples of the “substituent” in the “cycloalkyl group of” or “straight-chain or branched alkenyl group having 2 to 6 carbon atoms having a substituent” include a deuterium atom, a cyano group, and a nitro group; Halogen atoms such as fluorine, chlorine, bromine and iodine; linear or branched alkyloxy having 1 to 6 carbon atoms such as methyloxy, ethyloxy and propyloxy; vinyl and allyl Alkenyl groups such as phenyl groups; aryloxy groups such as phenyloxy groups and tolyloxy groups; arylalkyloxy groups such as benzyloxy groups and phenethyloxy groups; Group, biphenylyl group,
- substituents may further the exemplified substituents may be substituted. These substituents may be bonded to each other via a single bond, a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.
- a linear or branched alkyloxy group having 1 to 6 carbon atoms having a substituent represented by R 1 to R 8 in the general formula (1) or “having 5 to 5 carbon atoms having a substituent”
- Specific examples of the “substituent” in “10 cycloalkyloxy groups” include deuterium atom, cyano group, nitro group; halogen atom such as fluorine atom, chlorine atom, bromine atom, iodine atom; methyloxy group, ethyloxy
- a linear or branched alkyloxy group having 1 to 6 carbon atoms such as a propyloxy group; an alkenyl group such as a vinyl group or an allyl group; an aryloxy group such as a phenyloxy group or a tolyloxy group; a benzyloxy group , Arylalkyloxy groups such as phenethyloxy group; phenyl group, biphenylyl group, terphen
- aromatic hydrocarbon group “aromatic heterocyclic group” or “fused polycyclic aromatic group” in the “ring aromatic group”
- phenyl group biphenylyl group, terphenylyl group, naphthyl group, anthracenyl group Group
- phenanthrenyl group fluorenyl group, indenyl group, pyrenyl group, perylenyl group, fluoranthenyl group, triphenylenyl group, pyridyl group, furyl group, pyrrolyl group, thienyl group, quinolyl group, isoquinolyl group, benzofuranyl group, benzothienyl group, Indoly
- substituted aromatic hydrocarbon group “substituted aromatic heterocyclic group” or “substituted condensed polycyclic aromatic group” represented by R 1 to R 8 in the general formula (1), Specifically, deuterium atom, trifluoromethyl group, cyano group, nitro group; halogen atom such as fluorine atom, chlorine atom, bromine atom, iodine atom; methyl group, ethyl group, n-propyl group, isopropyl group, a linear or branched alkyl group having 1 to 6 carbon atoms such as n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, neopentyl group, n-hexyl group; methyloxy group A linear or branched alkyloxy group having 1 to 6 carbon atoms such as ethyloxy group
- aryloxy group in the “substituted or unsubstituted aryloxy group” represented by R 1 to R 8 in the general formula (1) include a phenyloxy group, a biphenylyloxy group, a terphenyl group.
- Examples include a ryloxy group, a naphthyloxy group, an anthracenyloxy group, a phenanthrenyloxy group, a fluorenyloxy group, an indenyloxy group, a pyrenyloxy group, and a perylenyloxy group.
- These groups may be bonded to each other through a single bond, a substituted or unsubstituted methylene group, an oxygen atom or a sulfur atom to form a ring.
- substituted aryloxy group represented by R 1 to R 8 in the general formula (1)
- substituents include deuterium atom, trifluoromethyl group, cyano group, nitro group; fluorine Halogen atoms such as atoms, chlorine atoms, bromine atoms, iodine atoms; methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, tert-butyl group, n-pentyl group, isopentyl group, Linear or branched alkyl group having 1 to 6 carbon atoms such as neopentyl group and n-hexyl group; linear or branched alkyl group having 1 to 6 carbon atoms such as methyloxy group, ethyloxy group and propyloxy group Alkyloxy groups; alkenyl groups such as vinyl and allyl groups;
- aromatic hydrocarbon group “aromatic heterocyclic group” or “fused polycyclic aromatic group”
- substituted or unsubstituted aromatic hydrocarbon represented by X in the above general formula (1)
- Aromaatic hydrocarbon group "aromatic heterocyclic group” or “fused polycycle” in “group”
- “substituted or unsubstituted aromatic heterocyclic group” or “substituted or unsubstituted condensed polycyclic aromatic group” The same groups as those shown for the “aromatic group” can be mentioned.
- these groups may have a substituent, and as the substituent, a “substituted aromatic hydrocarbon group” or a “substituted aromatic heterocyclic group” represented by X in the general formula (1) above. ”Or the“ substituent ”of the“ substituted condensed polycyclic aromatic group ”can be exemplified, and the possible embodiments can also be exemplified.
- Z 1 to Z 8 each represent a carbon atom or a nitrogen atom.
- any one to three of Z 1 to Z 4 are nitrogen atoms
- any one to four of Z 5 to Z 8 are nitrogen atoms.
- any two of Z 1 to Z 4 are nitrogen atoms
- any three of Z 1 to Z 4 are nitrogen atoms
- a hydrogen atom or substituent of R 1 , R 2 and R 3 is present Indicates not to.
- any one of Z 5 to Z 8 is a nitrogen atom
- any four of Z 5 to Z 8 are nitrogen atoms, this means that there are no hydrogen atoms or substituents of R 4 , R 5 , R 6 and Y.
- any one of Z 1 to Z 4 is a nitrogen atom and any one of Z 5 to Z 8 is a nitrogen atom, and Z 4 and Z 5 are What is a nitrogen atom is more preferable.
- the compound having a tetraazatriphenylene ring structure represented by the general formula (1) of the present invention has a small difference ( ⁇ E ST ) between excited triplet energy and excited singlet energy obtained by theoretical calculation, and a resonator. Since the intensity (f) is relatively large, the luminous efficiency is high, delayed fluorescence can be emitted, and the thin film state is stable.
- the compound having a tetraazatriphenylene ring structure represented by the general formula (1) of the present invention can be used as a constituent material of a light emitting layer of an organic EL device.
- the compound of the present invention that emits delayed fluorescence there is an effect that the luminous efficiency is dramatically improved.
- the compound having a tetraazatriphenylene ring structure represented by the general formula (1) of the present invention can be used as a constituent material of an electron transport layer of an organic EL device.
- a material having a higher electron injection / movement speed than conventional materials the electron transport efficiency from the electron transport layer to the light emitting layer is improved, the light emission efficiency is improved, and the driving voltage is lowered, It has the effect
- the compound having a tetraazatriphenylene ring structure represented by the general formula (1) of the present invention can also be used as a constituent material of a hole blocking layer of an organic EL device.
- a material with excellent hole-blocking ability and electron transportability compared to conventional materials and high stability in the thin film state the driving voltage is lowered and current resistance is maintained while having high luminous efficiency. Is improved and the maximum light emission luminance of the organic EL element is improved.
- the compound having a tetraazatriphenylene ring structure of the present invention is useful as a light-emitting material (dopant compound) of a light-emitting layer of an organic EL device or a constituent material of an electron transport layer or a hole blocking layer, and emits delayed fluorescence.
- the film is stable and has excellent heat resistance.
- FIG. 1 is a 1 H-NMR chart of the compound of Example 1 of the present invention (Compound 1).
- FIG. 3 is a 1 H-NMR chart of the compound of Example 2 of the present invention (Compound 35).
- FIG. 3 is a 1 H-NMR chart of the compound of Example 3 of the present invention (Compound 4).
- FIG. 3 is a 1 H-NMR chart of the compound of Example 4 of the present invention (Compound 3). It is the figure which showed the EL element structure of Example 12 and Comparative Example 1.
- FIG. 3 is a 1 H-NMR chart of the compound of Example 1 of the present invention (Compound 1).
- FIG. 3 is a 1 H-NMR chart of the compound of Example 2 of the present invention (Compound 35).
- FIG. 3 is a 1 H-NMR chart of the compound of Example 3 of the present invention (Compound 4).
- FIG. 3 is a 1 H-NMR chart of the compound of Example 4 of the present invention (Compound 3). It is the figure which
- the compound having a tetraazatriphenylene ring structure of the present invention can be synthesized, for example, as follows. First, 1,10-phenanthroline is brominated with bromine, N-bromosuccinimide or the like to introduce a bromo group, and then reacted with a mixture of potassium bromide and sulfuric acid-nitric acid to give 1 having a bromo group. , 10-phenanthroline-5,6-dione and further reacting with ethylenediamine, a tetraazatriphenylene derivative having a bromo group can be synthesized.
- a compound having a tetraazatriphenylene ring structure of the present invention can be synthesized by performing a cross-coupling reaction such as a ring (see, for example, Non-Patent Document 2).
- tetraazatriphenylene is first synthesized by reacting 1,10-phenanthroline-5,6-dione with ethylenediamine, and then brominated with N-bromosuccinimide or the like to obtain a tetraaza having a bromo group.
- a compound having a tetraazatriphenylene ring structure of the present invention can be synthesized by synthesizing a triphenylene derivative and performing a cross-coupling reaction such as Suzuki coupling or a condensation reaction such as a Buchwald-Hartwig reaction as described above. .
- a cross-coupling reaction such as Suzuki coupling
- a condensation reaction such as a Buchwald-Hartwig reaction as described above.
- the compounds were purified by column chromatography, adsorption purification using silica gel, activated carbon, activated clay, etc., recrystallization or crystallization using a solvent, sublimation purification, and the like.
- the compound was identified by NMR analysis.
- the work function was measured as a physical property value.
- the work function is an index of energy level as a material of the light emitting layer or an index of hole blocking ability.
- the work function was measured using an atmospheric photoelectron spectrometer (AC-3 type, manufactured by Riken Keiki Co., Ltd.) by forming a 100 nm thin film on the ITO substrate.
- an anode, a hole transport layer, a light emitting layer, a hole blocking layer, an electron transport layer, and a cathode are sequentially formed on the substrate, and the anode and the hole transport layer Examples include those having a hole injection layer between them, those having an electron injection layer between the electron transport layer and the cathode, and those having an electron blocking layer between the light emitting layer and the hole transport layer.
- several organic layers can be omitted.
- a structure having an anode, a hole transport layer, a light-emitting layer, an electron transport layer, and a cathode sequentially on a substrate can be used. .
- the light emitting layer, the hole transport layer, and the electron transport layer may have a structure in which two or more layers are laminated.
- an electrode material having a large work function such as ITO or gold is used.
- a hole injection layer of the organic EL device of the present invention in addition to a porphyrin compound typified by copper phthalocyanine, a naphthalene diamine derivative, a starburst type triphenylamine derivative, three or more triphenylamine structures in the molecule, Triphenylamine trimers and tetramers such as arylamine compounds having a structure linked by a divalent group containing no bond or hetero atom, acceptor heterocyclic compounds such as hexacyanoazatriphenylene, and coating-type polymers Materials can be used. These materials can be formed into a thin film by a known method such as a spin coating method or an ink jet method in addition to a vapor deposition method.
- N, N′-diphenyl-N, N′-di (m-tolyl) -benzidine TPD
- Benzidine derivatives such as N, N′-diphenyl-N, N′-di ( ⁇ -naphthyl) -benzidine (NPD), N, N, N ′, N′-tetrabiphenylylbenzidine, 1,1-bis [ (Di-4-tolylamino) phenyl] cyclohexane (TAPC), various triphenylamine trimers and tetramers, carbazole derivatives, and the like can be used.
- a coating type polymer material such as poly (3,4-ethylenedioxythiophene) (PEDOT) / poly (styrene sulfonate) (PSS) can be used for the hole injection / transport layer.
- PEDOT poly (3,4-ethylenedioxythiophene)
- PSS poly (styrene sulfonate)
- These materials can be formed into a thin film by a known method such as a spin coating method or an ink jet method in addition to a vapor deposition method.
- trisbromophenylamine hexachloroantimony, a radicalene derivative (see, for example, International Publication No. 2014/009310) or the like is further added to the materials usually used for the layer.
- a doped compound or a polymer compound having a partial structure of a benzidine derivative such as TPD can be used.
- 4,4 ′, 4 ′′ -tri (N-carbazolyl) triphenylamine (TCTA), 9,9-bis [4- (carbazol-9-yl) phenyl Carbazole derivatives such as fluorene, 1,3-bis (carbazol-9-yl) benzene (mCP), 2,2-bis (4-carbazol-9-ylphenyl) adamantane (Ad-Cz), 9- [4 -(Carbazol-9-yl) phenyl] -9- [4- (triphenylsilyl) phenyl] -9H-Fluorene has an electron blocking action such as a compound having a triphenylsilyl group and a triarylamine structure.
- Compounds can be used. These may be formed alone, but may be used as a single layer formed by mixing with other materials, layers formed alone, mixed layers formed, or A stacked structure of layers formed by mixing with a layer formed alone may be used. These materials can be formed into a thin film by a known method such as a spin coating method or an ink jet method in addition to a vapor deposition method.
- a compound having a tetraazatriphenylene ring structure represented by the general formula (1) of the present invention PIC-TRZ (for example, see Non-Patent Document 1), CC2TA (for example, non- Patent Document 3), PXZ-TRZ (for example, refer to Non-Patent Document 4), CDCB derivatives such as 4CzIPN (for example, refer to Non-Patent Document 5), a material that emits delayed fluorescence, tris (8-hydroxyquinoline) aluminum
- metal complexes such as metal complexes of quinolinol derivatives including (Alq 3 ), anthracene derivatives, bisstyrylbenzene derivatives, pyrene derivatives, oxazole derivatives, polyparaphenylene vinylene derivatives, and the like can be used.
- the light emitting layer may be composed of a host material and a dopant material.
- a host material a compound having a tetraazatriphenylene ring structure represented by the general formula (1) of the present invention, mCP, thiazole derivative , Benzimidazole derivatives, polydialkylfluorene derivatives, and the like can be used.
- the dopant material is a material that emits delayed fluorescence, such as a compound having a tetraazatriphenylene ring structure represented by the general formula (1) of the present invention, a CDCB derivative such as PIC-TRZ, CC2TA, PXZ-TRZ, 4CzIPN, etc.
- Quinacridone, coumarin, rubrene, anthracene, perylene and derivatives thereof, benzopyran derivatives, rhodamine derivatives, aminostyryl derivatives and the like can be used. These may be formed alone, but may be used as a single layer formed by mixing with other materials, layers formed alone, mixed layers formed, or A stacked structure of layers formed by mixing with a layer formed alone may be used.
- a phosphorescent light emitting material can be used as the light emitting material.
- a phosphorescent emitter of a metal complex such as iridium or platinum can be used.
- Green phosphorescent emitters such as Ir (ppy) 3
- blue phosphorescent emitters such as FIrpic and FIr6, and red phosphorescent emitters
- Btp 2 Ir (acac) and Ir (piq) 3 are used.
- the host material 4,4′-di (N-carbazolyl) biphenyl (CBP), carbazole derivatives such as TCTA, mCP, and the like can be used as hole injection / transport host materials.
- UHH2 triphenylsilyl
- TPBI 2,2 ′, 2 ′′-(1,3,5-phenylene) -tris (1-phenyl-1H-benzimidazole) )
- TPBI p-bis (triphenylsilyl) benzene
- TPBI 2,2 ′, 2 ′′-(1,3,5-phenylene) -tris (1-phenyl-1H-benzimidazole)
- the phosphorescent light-emitting material into the host material by co-evaporation in the range of 1 to 30 weight percent with respect to the entire light-emitting layer.
- These materials can be formed into a thin film by a known method such as a spin coating method or an ink jet method in addition to a vapor deposition method.
- an element having a structure in which a light-emitting layer manufactured using a compound having a different work function as a host material is stacked adjacent to a light-emitting layer manufactured using the compound of the present invention can be manufactured (for example, non-patented). Reference 6).
- a compound having a tetraazatriphenylene ring structure represented by the general formula (1) of the present invention a phenanthroline derivative such as bathocuproine (BCP), aluminum (III) bis ( Metal complexes of quinolinol derivatives such as 2-methyl-8-quinolinato) -4-phenylphenolate (BAlq), 2,8-bis (diphenylphosphoryl) dibenzo [b, d] thiophene (hereinafter abbreviated as PPT), etc.
- BCP bathocuproine
- BAlq aluminum
- PPT 2,8-bis (diphenylphosphoryl) dibenzo [b, d] thiophene
- various rare earth complexes in addition to the dibenzothiophene derivative, various rare earth complexes, oxazole derivatives, triazole derivatives, triazine derivatives, and the like can be used. These materials may also serve as the material for the electron transport layer. These may be formed alone, but may be used as a single layer formed by mixing with other materials, layers formed alone, mixed layers formed, or A stacked structure of layers formed by mixing with a layer formed alone may be used. These materials can be formed into a thin film by a known method such as a spin coating method or an ink jet method in addition to a vapor deposition method.
- various compounds in addition to compounds having a tetraazatriphenylene ring structure represented by the general formula (1) of the present invention metal complexes of quinolinol derivatives including Alq 3 and BAlq, and the like.
- Metal complexes, triazole derivatives, triazine derivatives, oxadiazole derivatives, thiadiazole derivatives, carbodiimide derivatives, quinoxaline derivatives, phenanthroline derivatives, silole derivatives, benzimidazole derivatives such as TPBI, and the like can be used.
- These may be formed alone, but may be used as a single layer formed by mixing with other materials, layers formed alone, mixed layers formed, or A stacked structure of layers formed by mixing with a layer formed alone may be used.
- These materials can be formed into a thin film by a known method such as a spin coating method or an ink jet method in addition to a vapor deposition method.
- an alkali metal salt such as lithium fluoride and cesium fluoride
- an alkaline earth metal salt such as magnesium fluoride
- a metal oxide such as aluminum oxide
- a material usually used for the layer is further doped with a metal such as cesium or a triarylphosphine oxide derivative (for example, see International Publication No. 2014/195482). Can be used.
- an electrode material having a low work function such as aluminum or an alloy having a lower work function such as a magnesium silver alloy, a magnesium indium alloy, or an aluminum magnesium alloy is used as the electrode material.
- the preferable material which can be used for the organic EL element of this invention is illustrated concretely.
- the material that can be used in the present invention is not limited to the following exemplary compounds.
- R and R 2 to R 7 in the structural formulas of the following exemplary compounds each independently represent a hydrogen atom or a substituent.
- n represents an integer of 3 to 5.
- preferable compounds as materials that can be added are given.
- adding as a stabilizing material can be considered.
- the compounds of Examples 1 and 3 of the present invention have a value deeper than the work function of 5.4 eV of general hole transport materials such as NPD and TPD, and large holes. Has blocking ability.
- Example 1 of the present invention a 10 ⁇ 5 mol / L toluene solution was prepared.
- this toluene solution was irradiated with ultraviolet light at 300 K while passing nitrogen, fluorescence having a peak wavelength of 587 nm was observed.
- a time-resolved spectrum of this toluene solution was measured using a small fluorescence lifetime measuring apparatus (manufactured by Hamamatsu Photonics Co., Ltd., Quantaurus-tau type) before and after the aeration of nitrogen, fluorescence having an emission lifetime of 0.02 ⁇ s, Then, delayed fluorescence having an emission lifetime of 1.08 ⁇ s was observed.
- PL photoluminescence
- Example 6 instead of the compound of Example 1 of the present invention (Compound 1), a 10 ⁇ 5 mol / L toluene solution of the compound of Example 2 of the present invention (Compound 35) was prepared, and the characteristics were evaluated in the same manner. Went. As a result, fluorescence with a peak wavelength of 584 nm was observed, fluorescence with an emission lifetime of 4.82 ns, and delayed fluorescence with emission lifetimes of 0.02 ⁇ s and 1.29 ⁇ s were observed. Moreover, PL quantum efficiency was 5.3% before nitrogen ventilation, and 10.6% after nitrogen ventilation.
- Example 6 instead of the compound of Example 1 of the present invention (Compound 1), a 10 ⁇ 5 mol / L toluene solution of the compound of Example 3 of the present invention (Compound 4) was prepared, and the characteristics were evaluated in the same manner. Went. As a result, fluorescence having a peak wavelength of 532 nm was observed. Moreover, PL quantum efficiency was 13.3% before nitrogen ventilation, and 19.2% after nitrogen ventilation.
- Example 6 instead of the compound of Example 1 of the present invention (Compound 1), a 10 ⁇ 5 mol / L toluene solution of the compound of Example 4 of the present invention (Compound 3) was prepared, and the characteristics were evaluated in the same manner. Went. As a result, fluorescence having a peak wavelength of 584 nm was observed, and fluorescence having an emission lifetime of 7 ns and delayed fluorescence having an emission lifetime of 0.2 ⁇ s were observed. Moreover, PL quantum efficiency was 14.8% before nitrogen ventilation, and 17.4% after nitrogen ventilation.
- a thin film having a film thickness of 100 nm was produced to obtain an organic PL element.
- an absolute PL quantum yield measuring apparatus Quantaurus-QY type, manufactured by Hamamatsu Photonics Co., Ltd.
- Example 6 An organic PL device was produced under the same conditions in place of mCP and the compound of Example 1 of the present invention (Compound 1) in place of mCP and the compound of Example 3 of the present invention (Compound 4). About the produced organic PL element, the characteristic evaluation was performed by the same operation. As a result, the PL quantum efficiency was 52.6%. Further, in the element emission, the fluorescence component was 19% and the delayed fluorescence component was 81%.
- the organic EL element has a hole transport layer 3, a light emitting layer 4, a hole blocking layer 5, an electron transport layer on a glass substrate 1 on which an ITO electrode is previously formed as a transparent anode 2. 6, an electron injection layer 7 and a cathode (aluminum electrode) 8 were deposited in this order.
- the glass substrate 1 on which ITO having a thickness of 100 nm was formed was washed with an organic solvent, and then the surface was washed by UV ozone treatment. Then, this glass substrate with an ITO electrode was mounted in a vacuum vapor deposition machine and the pressure was reduced to 0.001 Pa or less. Subsequently, NPD was formed as a hole transport layer 3 so as to cover the transparent anode 2 so as to have a film thickness of 35 nm at a deposition rate of 2.0 ⁇ / sec.
- Binary vapor deposition was performed at a vapor deposition rate of and a film thickness of 15 nm was formed.
- the PPT was formed as the hole blocking layer 5 so as to have a film thickness of 10 nm at a deposition rate of 2.0 ⁇ / sec.
- the TPBI was formed as the electron transport layer 6 so as to have a film thickness of 55 nm at a deposition rate of 2.0 ⁇ / sec.
- lithium fluoride was formed as the electron injection layer 7 so as to have a film thickness of 0.8 nm at a deposition rate of 0.1 ⁇ / sec. Finally, aluminum was deposited to a thickness of 70 nm to form the cathode 8. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- Example 1 For comparison, the material of the light-emitting layer 4 in Example 12 was changed from mCP and the compound of Example 1 of the present invention (Compound 1) to mCP and a compound of the following structural formula described in JP-A-2010-505241 (Comparative Compound A). ), An organic EL device was produced under the same conditions. About the produced organic EL element, the characteristic measurement was performed at normal temperature in air
- the luminance when a current having a current density of 10 mA / cm 2 was passed was compared with 82 cd / m 2 of the organic EL element of Comparative Example 1 using Comparative Compound A.
- the EL element greatly improved to 2396 cd / m 2 .
- the luminous efficiency was greatly improved to 22.1 cd / A in the organic EL element of Example 12 as compared to 0.9 cd / A in the organic EL element in Comparative Example 1 using Comparative Compound A.
- the power efficiency of the organic EL device of Example 12 was greatly improved to 8.9 lm / W compared to 0.4 lm / W of the organic EL device of Comparative Example 1 using Comparative Compound A.
- the organic EL device using the compound of the present invention can achieve a significant improvement in luminous efficiency as compared with the organic EL device using Comparative Compound A.
- the compound having a tetraazatriphenylene ring structure of the present invention can emit delayed fluorescence and has good thin film stability, and thus is excellent as a material for the light emitting layer, particularly as a dopant material for the light emitting layer. Moreover, the brightness
Abstract
Description
1993年にプリンストン大学のM.A.Baldoらは、イリジウム錯体を用いた燐光発光素子によって8%の外部量子効率を実現させた。
また、熱活性化遅延蛍光(TADF)による発光を利用する素子も開発されている。2011年に九州大学の安達らは、熱活性化遅延蛍光材料を用いた素子によって5.3%の外部量子効率を実現させた(例えば、非特許文献1参照)。
そこで、遅延蛍光を示す材料を利用する有機EL素子が考えられる。ある種の蛍光物質は、系間交差などにより励起三重項状態へとエネルギーが遷移した後、三重項-三重項消滅あるいは熱エネルギーの吸収により、励起一重項状態に逆系間交差され蛍光を放射する。有機EL素子においては、後者の熱活性化型の遅延蛍光を示す材料が特に有用であると考えられる。ここで、有機EL素子に遅延蛍光材料を利用した場合、励起一重項状態の励起子は通常通り蛍光を放射する。一方、励起三重項状態の励起子は、デバイスが発する熱を吸収して励起一重項へ系間交差され蛍光を放射する。この場合、励起一重項からの発光であるため蛍光と同波長での発光でありながら、励起三重項状態から励起一重項状態への逆系間交差により、生じる光の寿命、すなわち発光寿命は通常の蛍光や燐光よりも長くなるため、これらよりも遅延した蛍光として観察される。これを遅延蛍光として定義できる。このような熱活性化型の励起子移動機構を用いること、すなわち、キャリア注入後に熱エネルギーの吸収を経ることにより、通常は25%しか生成しなかった励起一重項状態の化合物の比率を25%以上に引き上げることが可能となる。100℃未満の低い温度でも強い蛍光および遅延蛍光を発する化合物を用いれば、デバイスの熱で充分に励起三重項状態から励起一重項状態への系間交差が生じ、遅延蛍光を放射することから、発光効率が飛躍的に向上する(例えば、特許文献1および特許文献2参照)。
また、これらの基が有する置換基としては、カルバゾリル基、芳香族炭化水素基で置換されたジ置換アミノ基が好ましく、カルバゾリル基、ジフェニルアミノ基がより好ましい。
また、これらの基が有する置換基としては、カルバゾリル基、芳香族炭化水素基で置換されたジ置換アミノ基が好ましく、カルバゾリル基、ジフェニルアミノ基がより好ましい。
ここで、Z1~Z4のいずれか1~3個が窒素原子であるものとし、また、Z5~Z8のいずれか1~4個が窒素原子であるものとする。
この場合、Z1~Z4のいずれか1つが窒素原子である場合、R3の水素原子もしくは置換基が存在しないことを表し、Z1~Z4のいずれか2つが窒素原子である場合、R2、R3の水素原子もしくは置換基が存在しないことを表し、Z1~Z4のいずれか3つが窒素原子である場合、R1、R2、R3の水素原子もしくは置換基が存在しないことを表す。
同様に、Z5~Z8のいずれか1つが窒素原子である場合、R4の水素原子もしくは置換基が存在しないことを表し、Z5~Z8のいずれか2つが窒素原子である場合、R4、R5の水素原子もしくは置換基が存在しないことを表し、Z5~Z8のいずれか3つが窒素原子である場合、R4、R5、R6の水素原子もしくは置換基が存在しないことを表し、Z5~Z8のいずれか4つが窒素原子である場合、R4、R5、R6およびYの水素原子もしくは置換基が存在しないことを表す。
本発明の一般式(1)において、Z1~Z4のいずれか1つが窒素原子であって、Z5~Z8のいずれか1つが窒素原子であるものが好ましく、Z4およびZ5が窒素原子であるものがより好ましい。
なお、ブロモ化の試薬、条件を変更することによって、置換位置の異なるブロモ置換体を得ることができる。
同様に、出発物質である1,10-フェナントロリンに代えて、1,10-フェナントロリンの同族体である、フェナントロリン環上の窒素の位置が異なる異性体を用いることによって、テトラアザトリフェニレン環上の窒素の位置が異なる本発明のテトラアザトリフェニレン環構造を有する化合物を合成することができる。
窒素置換した反応容器に、1,10-フェナントロリン・一水和物(22g)、二塩化二硫黄(49g)、ピリジン(30mL)、1-クロロブタン(300mL)を加え、攪拌しながら臭素(57g)を滴下した。続いて、攪拌しながら加熱し、6時間加熱還流した。室温まで冷却した後、18Mの水酸化ナトリウム水溶液(300mL)、クロロホルム(400mL)を加え、1時間室温で攪拌した後、セライトを助剤としてろ過を行った。抽出操作を行って、クロロホルム層を採取し、飽和食塩水を用いた洗浄を行った後、溶媒を留去した。残渣をカラムクロマトグラフィーによる精製を行うことによって、3,8-ジブロモ-1,10-フェナントロリン(収率50%)を得た。
実施例1で合成した6,11-ジブロモ-1,4,8,9-テトラアザトリフェニレン(1.0g)、3-(ジフェニルアミノ)カルバゾール(2.0g)、ナトリウム-tert-ブトキシド(0.6g)、トリ-tert-ブチルホスフィン(0.1g)、キシレン(60mL)を窒素置換した反応容器に加え、攪拌しながら反応液を脱気した後、トリス(ジベンジリデンアセトン)パラジウム・クロロホルム包接体(0.07g)を加えて加熱し、攪拌しながら5時間加熱還流した。放冷した後、メタノールを加え、析出する粗製物をろ過によって採取し、シリカゲルカラムクロマトグラフィーによる精製を行うことによって、6,11-ビス{3-(ジフェニルアミノ)カルバゾール-9-イル}-1,4,8,9-テトラアザトリフェニレン(化合物35)の黄白色粉末(収率10%)を得た。
実施例1で合成した6,11-ジブロモ-1,4,8,9-テトラアザトリフェニレン(1.0g)、ジフェニルアミン(1.2g)、ナトリウム-tert-ブトキシド(0.6g)、トリ-tert-ブチルホスフィン(0.1g)、キシレン(60mL)を窒素置換した反応容器に加え、攪拌しながら反応液を脱気した後、トリス(ジベンジリデンアセトン)パラジウム・クロロホルム包接体(0.07g)を加えて加熱し、攪拌しながら5時間加熱還流した。放冷した後、メタノールを加え、析出する粗製物をろ過によって採取し、シリカゲルカラムクロマトグラフィーによる精製を行うことによって、6,11-ビス(ジフェニルアミノ)-1,4,8,9-テトラアザトリフェニレン(化合物4)の白色粉末(収率40%)を得た。
実施例1で合成した6,11-ジブロモ-1,4,8,9-テトラアザトリフェニレン(1.0g)、カルバゾール(1.2g)、ナトリウム-tert-ブトキシド(0.6g)、トリ-tert-ブチルホスフィン(0.1g)、キシレン(60mL)を窒素置換した反応容器に加え、攪拌しながら反応液を脱気した後、トリス(ジベンジリデンアセトン)パラジウム・クロロホルム包接体(0.07g)を加えて加熱し、攪拌しながら5時間加熱還流した。放冷した後、メタノールを加え、析出する粗製物をろ過によって採取し、シリカゲルカラムクロマトグラフィーによる精製を行うことによって、6,11-ビス(カルバゾール-9-イル)-1,4,8,9-テトラアザトリフェニレン(化合物3)の黄白色粉末(収率36%)を得た。
仕事関数
本発明実施例1の化合物 5.70eV
本発明実施例3の化合物 5.60eV
また、このトルエン溶液について、窒素の通気前後における小型蛍光寿命測定装置(浜松ホトニクス(株)製、Quantaurus-tau型)を用いた時間分解スペクトルを測定したところ、発光寿命が0.02μsの蛍光、そして発光寿命が1.08μsの遅延蛍光を観測した。
また、このトルエン溶液について、窒素の通気前後におけるフォトルミネッセンス(以後、PLと略称する。)量子効率を絶対PL量子収率測定装置(浜松ホトニクス(株)製、Quantaurus-QY型)を用いて、300Kで測定したところ、窒素通気前で2.9%、窒素通気後で9.1%であった。
また、PL量子効率は、窒素通気前で5.3%、窒素通気後で10.6%であった。
また、PL量子効率は、窒素通気前で13.3%、窒素通気後で19.2%であった。
また、PL量子効率は、窒素通気前で14.8%、窒素通気後で17.4%であった。
続いて、透明陽極2を覆うように正孔輸送層3として、NPDを蒸着速度2.0Å/secで膜厚35nmとなるように形成した。この正孔輸送層3の上に、発光層4としてmCPと本発明実施例1の化合物(化合物1)を、蒸着速度比がmCP:本発明実施例1の化合物(化合物1)=95:5となる蒸着速度で二元蒸着を行い、膜厚15nmとなるように形成した。この発光層4の上に、正孔阻止層5として前記PPTを蒸着速度2.0Å/secで膜厚10nmとなるように形成した。この正孔阻止層5の上に、電子輸送層6として前記TPBIを蒸着速度2.0Å/secで膜厚55nmとなるように形成した。この電子輸送層6の上に、電子注入層7としてフッ化リチウムを蒸着速度0.1Å/secで膜厚0.8nmとなるように形成した。最後に、アルミニウムを膜厚70nmとなるように蒸着して陰極8を形成した。作製した有機EL素子について、大気中、常温で特性測定を行った。
比較のために、実施例12における発光層4の材料を、mCPと本発明実施例1の化合物(化合物1)からmCPと特開2010-505241号公報記載の下記構造式の化合物(比較化合物A)に代え、同様の条件で有機EL素子を作製した。作製した有機EL素子について、大気中、常温で特性測定を行った。作製した有機EL素子に直流電圧を印加したときの発光特性の測定結果を表1にまとめて示した。
2 透明陽極
3 正孔輸送層
4 発光層
5 正孔阻止層
6 電子輸送層
7 電子注入層
8 陰極
Claims (14)
- 下記一般式(1)で表されるテトラアザトリフェニレン環構造を有する化合物。
(式中、Xは置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、Yは水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、R1~R8は相互に同一でも異なってもよく、水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基であって、単結合、置換もしくは無置換のメチレン基、酸素原子または硫黄原子を介して互いに結合して環を形成してもよい。Z1~Z8は炭素原子もしくは窒素原子であり、Z1~Z4の少なくとも1つが窒素原子であって、かつZ5~Z8の少なくとも1つが窒素原子であるものとし、この場合の窒素原子はR1~R6の水素原子もしくは置換基を有さないものとする。) - 下記一般式(1a)で表される請求項1記載のテトラアザトリフェニレン環構造を有する化合物。
(式中、Xは置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、Yは水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、R1~R2、R5~R8は相互に同一でも異なってもよく、水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基であって、単結合、置換もしくは無置換のメチレン基、酸素原子または硫黄原子を介して互いに結合して環を形成してもよい。) - 下記一般式(1a-1)で表される請求項1記載のテトラアザトリフェニレン環構造を有する化合物。
(式中、Xは置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、Yは水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、R1~R2、R5~R8は相互に同一でも異なってもよく、水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基であって、単結合、置換もしくは無置換のメチレン基、酸素原子または硫黄原子を介して互いに結合して環を形成してもよい。) - 下記一般式(1a-2)で表される請求項1記載のテトラアザトリフェニレン環構造を有する化合物。
(式中、Xは置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、Yは水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、R1~R2、R5~R8は相互に同一でも異なってもよく、水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基であって、単結合、置換もしくは無置換のメチレン基、酸素原子または硫黄原子を介して互いに結合して環を形成してもよい。) - 下記一般式(1a-3)で表される請求項1記載のテトラアザトリフェニレン環構造を有する化合物。
(式中、Xは置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、Yは水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、R1~R2、R5~R8は相互に同一でも異なってもよく、水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基であって、単結合、置換もしくは無置換のメチレン基、酸素原子または硫黄原子を介して互いに結合して環を形成してもよい。) - 下記一般式(1a-4)で表される請求項1記載のテトラアザトリフェニレン環構造を有する化合物。
(式中、Xは置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、Yは水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基を表し、R1~R2、R5~R8は相互に同一でも異なってもよく、水素原子、重水素原子、フッ素原子、塩素原子、シアノ基、ニトロ基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキル基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキル基、置換基を有していてもよい炭素原子数2ないし6の直鎖状もしくは分岐状のアルケニル基、置換基を有していてもよい炭素原子数1ないし6の直鎖状もしくは分岐状のアルキルオキシ基、置換基を有していてもよい炭素原子数5ないし10のシクロアルキルオキシ基、置換もしくは無置換の芳香族炭化水素基、置換もしくは無置換の芳香族複素環基、置換もしくは無置換の縮合多環芳香族基、置換もしくは無置換のアリールオキシ基、または芳香族炭化水素基、芳香族複素環基もしくは縮合多環芳香族基から選ばれる基によって置換されたジ置換アミノ基であって、単結合、置換もしくは無置換のメチレン基、酸素原子または硫黄原子を介して互いに結合して環を形成してもよい。) - 前記一般式(1)において、X、Yが相互に同一でも異なってもよく、置換もしくは無置換のカルバゾリル基、フェノキサジニル基、フェノチアジニル基、アクリジニル基、フェナジニル基、または芳香族炭化水素基もしくは縮合多環芳香族基で置換されたジ置換アミノ基から選ばれる基である請求項1記載のテトラアザトリフェニレン環構造を有する化合物。
- 前記請求項1に記載のテトラアザトリフェニレン環構造を有する化合物からなる発光材料。
- 遅延蛍光を放射する請求項8記載の発光材料。
- 一対の電極とその間に挟まれた少なくとも一層の有機層を有する有機エレクトロルミネッセンス素子において、前記請求項1に記載のテトラアザトリフェニレン環構造を有する化合物が、少なくとも1つの有機層の構成材料として用いられている有機エレクトロルミネッセンス素子。
- 前記した有機層が発光層である請求項10記載の有機エレクトロルミネッセンス素子。
- 前記した有機層が遅延蛍光を放射する請求項11記載の有機エレクトロルミネッセンス素子。
- 前記した有機層が電子輸送層である請求項10記載の有機エレクトロルミネッセンス素子。
- 前記した有機層が正孔阻止層である請求項10記載の有機エレクトロルミネッセンス素子。
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US11101440B2 (en) | 2015-07-01 | 2021-08-24 | Kyushu University, National University Corporation | Organic electroluminescent device |
JP2018014404A (ja) * | 2016-07-21 | 2018-01-25 | 株式会社デンソー | 発光素子、表示装置および電子機器 |
US11335872B2 (en) | 2016-09-06 | 2022-05-17 | Kyulux, Inc. | Organic light-emitting device |
US11482679B2 (en) | 2017-05-23 | 2022-10-25 | Kyushu University, National University Corporation | Compound, light-emitting lifetime lengthening agent, use of n-type compound, film and light-emitting device |
US11930654B2 (en) | 2017-07-06 | 2024-03-12 | Kyulux, Inc. | Organic light-emitting element |
US11476435B2 (en) | 2017-08-24 | 2022-10-18 | Kyushu University, National University Corporation | Film and organic light-emitting device containing perovskite-type compound and organic light-emitting material |
WO2020076796A1 (en) | 2018-10-09 | 2020-04-16 | Kyulux, Inc. | Novel composition of matter for use in organic light-emitting diodes |
WO2021157642A1 (ja) | 2020-02-04 | 2021-08-12 | 株式会社Kyulux | ホスト材料、組成物および有機発光素子 |
WO2021157593A1 (ja) | 2020-02-04 | 2021-08-12 | 株式会社Kyulux | 組成物、膜、有機発光素子、発光組成物を提供する方法およびプログラム |
WO2021235549A1 (ja) | 2020-05-22 | 2021-11-25 | 株式会社Kyulux | 化合物、発光材料および発光素子 |
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WO2022270354A1 (ja) | 2021-06-23 | 2022-12-29 | 株式会社Kyulux | 化合物、発光材料および有機発光素子 |
WO2022270602A1 (ja) | 2021-06-23 | 2022-12-29 | 株式会社Kyulux | 有機発光素子および膜 |
WO2022270113A1 (ja) | 2021-06-23 | 2022-12-29 | 株式会社Kyulux | 有機エレクトロルミネッセンス素子 |
WO2023282224A1 (ja) | 2021-07-06 | 2023-01-12 | 株式会社Kyulux | 有機発光素子およびその設計方法 |
WO2023053835A1 (ja) | 2021-09-28 | 2023-04-06 | 株式会社Kyulux | 化合物、組成物、ホスト材料、電子障壁材料および有機発光素子 |
Also Published As
Publication number | Publication date |
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TWI662036B (zh) | 2019-06-11 |
TW201544507A (zh) | 2015-12-01 |
CN106103440B (zh) | 2019-03-26 |
US20170125700A1 (en) | 2017-05-04 |
JP2020074357A (ja) | 2020-05-14 |
CN106103440A (zh) | 2016-11-09 |
US11283026B2 (en) | 2022-03-22 |
JPWO2015159541A1 (ja) | 2017-04-13 |
JP6781630B2 (ja) | 2020-11-04 |
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