EP2335298A1 - Materialien für organische elektrolumineszenzvorrichtungen - Google Patents
Materialien für organische elektrolumineszenzvorrichtungenInfo
- Publication number
- EP2335298A1 EP2335298A1 EP09778440A EP09778440A EP2335298A1 EP 2335298 A1 EP2335298 A1 EP 2335298A1 EP 09778440 A EP09778440 A EP 09778440A EP 09778440 A EP09778440 A EP 09778440A EP 2335298 A1 EP2335298 A1 EP 2335298A1
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- Prior art keywords
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- substituted
- radicals
- aromatic
- formula
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C211/00—Compounds containing amino groups bound to a carbon skeleton
- C07C211/43—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
- C07C211/54—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to two or three six-membered aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/66—Preparation of compounds containing amino groups bound to a carbon skeleton from or via metallo-organic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C211/00—Compounds containing amino groups bound to a carbon skeleton
- C07C211/43—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
- C07C211/57—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton
- C07C211/58—Naphthylamines; N-substituted derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/86—Carbazoles; Hydrogenated carbazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
- C07D403/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing three or more hetero rings
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent materials, e.g. electroluminescent or chemiluminescent
- C09K11/06—Luminescent materials, e.g. electroluminescent or chemiluminescent containing organic luminescent materials
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/15—Hole transporting layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2101/00—Properties of the organic materials covered by group H10K85/00
- H10K2101/90—Multiple hosts in the emissive layer
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Definitions
- the present invention relates to organic semiconductors and their use in electronic devices.
- OLEDs organic electroluminescent devices
- orffto-diarylamine-substituted aromatics have particularly good charge transport properties and also significantly improve the efficiency and lifetime of the electronic devices produced therewith.
- US 2004/0151944 A1 discloses a red or orange fluorescent dopant-matrix mixture wherein the host has a perylene structure and the red dopant has a diketopyrrolopyrrole structure.
- the host structures are not suitable to cover also the colors green and blue.
- JP 2008/056625 A uses orffro-diarylamine-substituted naphthalenes in hole transport layers. It still exists
- these compounds are not suitable for use in blue phosphorescent OLEDs.
- JP 3171755 B2 and JP 09-148072 A disclose orffto-substituted diarylamines. However, there is still room for improvement in
- Ar 1 is the same or different at each instance and is a group which together with the group CC is an aryl or heteroaryl group
- two or more adjacent substituents R 1 may also together form a mono- or polycyclic, aliphatic or aromatic ring system;
- Ar is the same or different at each occurrence, an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, which may be substituted with one or more non-aromatic radicals R 1 ;
- R 2 is identical or different at each occurrence H, D or an aliphatic, aromatic and / or heteroaromatic organic radical having 1 to 20 C atoms, in which also H atoms may be replaced by D or F, preferably a hydrocarbon; two or more adjacent substituents R 2 may also be mono- or polycyclic, aliphatic or aromatic
- n 2 or 3;
- p is the same or different 0, 1 or 2 at each occurrence;
- r is the same or different 0, 1 or 2 at each occurrence.
- the compounds of the formula (1) preferably have a glass transition temperature TQ of greater than 70 ° C., more preferably greater than 100 ° C., very particularly preferably greater than 110 ° C.
- the compounds of the formula (1) are neutral.
- Ar 1 is an aromatic or heteroaromatic group which is o / t / 7o-substituted.
- An aryl group in the sense of this invention contains 6 to 60 C atoms;
- a heteroaryl group contains 2 to 60 C atoms and at least 1 heteroatom, with the proviso that the sum of C atoms and heteroatoms gives at least 5.
- the heteroatoms are preferably selected from N, O and / or S.
- a simple aromatic cycle ie benzene, or a simple heteroaromatic cycle, for example pyridine, pyrimidine, thiophene, etc., or a fused aryl or heteroaryl group, for example naphthalene, anthracene, pyrene, quinoline, isoquinoline, etc., understood.
- An aromatic ring system in the sense of this invention contains 6 to 60 carbon atoms in the ring system.
- a heteroaromatic ring system in the sense of this invention contains 2 to 60 C atoms and at least one heteroatom in the ring system, with the proviso that the sum of C atoms and heteroatoms gives at least 5.
- the heteroatoms are preferably selected from N, O and / or S.
- An aromatic or heteroaromatic ring system in the sense of this invention is to be understood as meaning a system which does not necessarily contain only aryl or heteroaryl groups but in which also several aryl or heteroaromatic ring systems Heteroaryl groups by a short, non-aromatic unit (preferably less than 10% of the atoms other than H), such as.
- N or O atom may be interrupted.
- systems such as 9,9'-spirobifluorene, 9,9-diaryl fluorene, triarylamine, diaryl ether, stilbene, benzophenone, etc. are to be understood as aromatic ring systems in the context of this invention.
- aromatic or heteroaromatic ring system is understood as meaning systems in which a plurality of aryl or heteroaryl groups are linked together by single bonds, for example biphenyl, terphenyl or bipyridine.
- a C 1 to C 40 -alkyl group in which individual H atoms or CH 2 groups may also be substituted by the abovementioned groups, particularly preferably the radicals methyl, ethyl, n-propyl, Propyl, n-butyl, i-butyl, s-butyl, t-butyl, 2-methylbutyl, n-pentyl, s-pentyl, cyclopentyl, n-hexyl, cyclohexyl, n-heptyl, cycloheptyl, n-octyl, cyclooctyl, 2-ethylhexyl, trifluoromethyl, pentafluoroethyl, 2,2,2-trifluoroethyl, ethenyl, propenyl, butenyl, pentenyl, cyclopentenyl, hexenyl,
- a C 1 to C 40 alkoxy group is more preferably understood as meaning methoxy, trifluoromethoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, s-butoxy, t-butoxy or 2-methylbutoxy.
- the symbol Ar 1 together with the group CC stands for benzene which may be substituted by one or more substituents R 1 , in particular by a substituent R 1 .
- the substituent R 1 is in the para position to X.
- the substituent R 1 is not hydrogen or deuterium.
- radical R 1 represents an aromatic or heteroaromatic ring system
- this is preferably selected from aromatic or heteroaromatic ring systems having 5 to 30 aromatic ring atoms, in particular having 6 to 20 aromatic ring atoms, very particularly preferably phenyl, 1-naphthyl, 2 Naphthyl, anthracenyl, phenylanthracenyl, 1- or 2-naphthylanthracenyl, binaphthyl, pyrenyl, fluoranthenyl, 2-, 3-, 4-, 5-, 6- or 7-benzanthracenyl, N-benzimidazolyl, phenyl-N-benzimidazolyl, N-phenylbenzimidazolyl or phenyl-N-phenylbenzimidazolyl.
- R 1 is the same or different each occurrence of H, D, methyl, ethyl, iso-propyl, tert-butyl or phenyl.
- linear or branched alkyl chains of up to 10 carbon atoms are also preferred.
- Ar 2 in the formulas (1), (2) or (3) is naphthalene or benzene and may each be substituted by R 1 . More preferably, the symbol Ar 2 is benzene, which may be substituted by R 1 . - 11 -
- Ar 3 is an aromatic or heteroaromatic ring system having 5 to 10 C atoms.
- Ar 3 particularly preferably represents thiophene, phenyl or naphthalene, each of which may be substituted by one or more radicals R 1 .
- the two groups Ar 3 may also be connected to one another by a single bond or a divalent group, as defined above, in particular C (R 2 ) 2 .
- Examples of preferred compounds according to the formulas (1) to (5) are the structures (1) to (122) depicted below.
- the compounds according to the invention can be synthesized using synthetic steps known to the person skilled in the art. It has proven to be particularly suitable to start from the central triarylamine or corresponding derivative with other groups X, which is substituted in the ortho position on the aryl groups with a reactive leaving group, in particular chlorine, bromine, iodine, tosylate or triflate. To this group can then be coupled in a Suzuki coupling a boronic acid derivative of the group (Ar 3 J 2 N-Ar 2 under palladium catalysis. - 29 -
- a further subject of the invention is therefore a process for the preparation of the compounds according to the invention comprising either the introduction of the group (Ar 3 J 2 N-Ar 2 as boronic acid derivative in a Suzuki coupling or the introduction of the group (Ar 3 ) 2 N as ( Ar 3 ) 2 NH in a Hartwig-Buchwald coupling.
- the compounds according to the invention described above in particular compounds which are substituted by reactive leaving groups, such as bromine, iodine, triflate, tosylate, boronic acid or boronic esters, can be used as monomers for producing corresponding dimers, trimers, tetramers, pentamers, oligomers, polymers or as the core of dendrimers.
- the oligomerization or polymerization is preferably carried out via the halogen functionality or the boronic acid functionality. This applies in particular to compounds in which the radicals R 1 each represent a reactive leaving group.
- the invention therefore further provides dimers, trimers, tetramers, pentamers, oligomers, polymers or dendrimers containing one or more compounds of the formula (1), where one or more radicals R 1 or R 2 form bonds between the compounds of the formula (1) in the Dimer, trimer, tetramer or pentamer or bonds of the compound according to formula (1) to the polymer, oligomer or dendrimer.
- An oligomer in the context of this invention is understood as meaning a compound which comprises at least six units according to
- the polymers, oligomers or dendrimers may be conjugated, partially conjugated or non-conjugated.
- the trimers, tetramers, pentamers, oligomers or polymers can be linear or branched.
- the units of formula (1) may be directly linked together, or they may be via a divalent group, for example via a substituted or unsubstituted one - 30 -
- Alkylene group via a heteroatom or via a bivalent aromatic or heteroaromatic group, be linked together.
- three or more units of formula (1) may be linked via a trivalent or higher valent group, for example via a trivalent or higher valent aromatic or heteroaromatic group, to a branched trimer, tetramer, pentamer, oligomer or polymer.
- repeat units of formula (1) in dimers, trimers, tetramers, pentamers, oligomers, polymers and dendrimers have the same preferences as described above.
- Preferred repeat units are therefore also here the units of the formula (2), (3), (4) and (5).
- the monomers according to the invention are homopolymerized or copolymerized with further monomers.
- Suitable and preferred comonomers are selected from fluorenes (eg according to EP 842208 or WO 00/22026), spirobifluorenes (eg according to EP 707020, EP 894107 or WO 06/061181), para-phenylenes (eg.
- WO 92/18552 carbazoles (eg according to WO 04/070772 or WO 04/113468), thiophenes (eg according to EP 1028136), dihydrophenanthrenes (eg according to WO 05/014689), cis and trans-indenofluorenes (for example according to WO 04/041901 or WO 04/113412), ketones (for example according to WO 05/040302), phenanthrenes (for example according to WO 05/104264 or WO 07 / 017066) or more of these units.
- the polymers, oligomers and dendrimers usually also contain further units, for example emitting (fluorescent or phosphorescent) units, such as.
- Vinyltriarylamines for example according to WO 07/068325
- phosphorescent metal complexes for example according to WO 06/003000
- charge transport units for example according to WO 07/068325
- the repeat olefins of the invention are particularly suitable as charge transport units for holes.
- Another object of the present invention are mixtures containing at least one compound of formula (1) or a corresponding dimer, trimer, tetramer, pentamer, oligomer or - 31 -
- the further compound may be, for example, a fluorescent or phosphorescent dopant, if the compound of formula (1) is used as matrix material. Suitable fluorescent and phosphorescent dopants are listed below in connection with the organic electroluminescent devices and are also preferred for the mixtures according to the invention.
- the further compound may also be a dopant if the compound according to formula (1) is a hole transport or electron transport compound. Suitable dopants are listed below in connection with the organic electroluminescent devices.
- compositions and solutions comprising at least one compound according to formula (1) or a corresponding dimer, trimer, tetramer,
- solvent usually an organic solvent.
- Such solutions are required for the preparation of the electronic device from solution, for example by spin coating or by printing processes. These solutions may also contain mixtures of compounds of the present invention.
- the compounds according to the invention of formula (1) and corresponding dimers, trimers, tetramers, pentamers, oligomers, polymers or dendrimers are suitable for use in electronic devices, in particular in organic electroluminescent devices (OLEDs, PLEDs). Depending on the substitution, the compounds are used in different functions and layers.
- An electronic device contains at least one anode, at least one cathode and at least one layer between the anode and the cathode, which contains at least one organic compound.
- Another object of the invention is therefore the use of compounds according to formula (1) or corresponding dimers, trimers, - 32 -
- Yet another object of the invention are electronic
- Devices comprising at least one compound according to formula (1) or a corresponding dimer, trimer, tetramer, pentamer, oligomer, polymer or dendrimer, in particular organic electroluminescent devices containing anode, cathode and at least one emitting layer, characterized in that at least an organic layer, which may be an emitting layer or another layer, containing at least one compound according to formula (1) or a corresponding dimer, trimer, tetramer, pentamer, oligomer, polymer or dendrimer.
- organic field effect transistors O-FETs
- O-TFTs organic thin film transistors
- O-LETs organic light emitting transistors
- O-ICs organic integrated circuits
- O-SCs organic solar cells
- O-FQDs organic Field quench devices
- LECs organic laser diodes
- O-lasers organic photoreceptors.
- the organic electroluminescent device may contain further layers. These are selected, for example, from one or more hole injection layers, hole transport layers, hole blocking - 33 -
- Layer 21 OLED (5), T. Matsumoto, T. Nakada, J. Endo, K. Mori, N. Kawamura, A. Yokoi J. Kido, Multiphoton Organic EL Device Having Charge Generation Layer) and / or Organic or Inorganic P / N Transitions.
- the layers, in particular the charge transport layers may also be doped. The doping of the layers may be advantageous for improved charge transport. It should be noted, however, that not necessarily each of these layers must be present and the choice of layers always depends on the compounds used and in particular also on the fact that it is a fluorescent or phosphorescent electroluminescent device.
- the organic electroluminescent device contains a plurality of emitting layers, wherein at least one organic layer contains at least one compound according to formula (1).
- these emission layers have a total of several emission maxima between 380 nm and 750 nm, so that overall white emission results, d. H.
- various emitting compounds are used which can fluoresce or phosphoresce and which emit blue, green, yellow, orange or red light.
- three-layer systems ie systems with three emitting layers, wherein at least one of these layers contains at least one compound according to formula (1) and wherein the three layers show blue, green and orange or red emission (for the basic structure see eg. WO 05/011013).
- Further preferred is the use of more than three emitting layers.
- white emission emitters which have broadband emission bands and thereby show white emission.
- the compounds of the formula (1) are used as matrix material for fluorescent or phosphorescent compounds in an emitting layer - 34 -
- one or more groups R 1 preferably represents an aromatic or heteroaromatic ring system, in particular an aromatic ring system containing anthracene.
- a matrix material is understood in a system of matrix and dopant that component which is present in the system in the higher proportion.
- the matrix is understood to be the component whose proportion is the highest in the mixture.
- the compound according to formula (1) can also be a component in a mixture of a plurality of matrix materials ("mixed host") can be used, wherein the emitter can also be a fluorescent or phosphorescent emitter here (1) is used in a mixture of a plurality of matrix materials, this compound usually represents the hole-conducting component.
- Matrix materials for phosphorescent emitters are preferably selected from the group consisting of CBP (N , N-biscarbazolylbiphenyl), carbazole derivatives (eg according to WO 05/039246, US 2005/0069729, JP 2004/288381, EP 1205527 or WO 08/086851, azacarbazoles (eg according to EP 1617710, EP 1617711, EP 1731584, JP 2005/347160), ketones (for example according to WO 04/093207 or the unpublished application DE 102008033943.1), phosphine oxides, sulfoxides and sulfones (for example according to WO 0 5/003253), oligophenylenes, aromatic amines (eg.
- CBP N , N-biscarbazolylbiphenyl
- carbazole derivatives eg according to WO 05/039246, US 2005/0069729, JP 2004/28
- bipolar matrix materials for example according to WO 07/137725
- silanes for example according to WO 05/111172
- 9,9-diaryl fluorene derivatives for example according to US Pat filed application DE 102008017591.9
- azaboroles eg according to WO 06/117052
- indolocarbazoles WO 07/063754, WO 08/056746
- triazine derivatives WO 07/063754 or not disclosed application DE 102008036982.9
- zinc complexes EP 652273 or unpublished application DE 102007053771.0
- the compound of the formula (1) when used as a matrix material for an emitting compound in an emitting layer, it may be used in combination with one or more fluorescent materials or phosphorescent materials (triplet emitters). Under phosphorescence in the context of this invention is the
- all luminescent Ir and Pt compounds are regarded as phosphorescent compounds.
- X is preferably N
- P O or triazine.
- the mixture of the compound according to formula (1) and the phosphorescent compound then contains between 99 and 1% by volume, preferably between 98 and 10% by volume, more preferably between 97 and 60% by volume, in particular between 95 and 85 vol .-% of the compound according to formula (1) based on the total mixture of emitter and matrix material. Accordingly, the mixture contains between 1 and 99% by volume, preferably between 2 and 90% by volume, more preferably between 3 and 40% by volume, in particular between 5 and 15% by volume of the emitter, based on the total mixture Emitter and matrix material.
- Suitable phosphorescent compounds are in particular compounds which emit light, preferably in the visible range, with suitable excitation, and also at least one atom of atomic number greater than 20, preferably greater than 38 and less than 84, particularly preferably greater than 56 and less than 80 contain.
- Preferred phosphorescence emitters used are compounds containing copper, molybdenum, tungsten, rhenium, ruthenium, osmium, rhodium, iridium, palladium, platinum, silver, gold or europium, in particular compounds containing iridium or platinum.
- Examples of the emitters described above can be found in the applications WO 00/70655, WO 01/41512, WO 02/02714, WO 02/15645, EP 1191613, EP 1191612, EP 1191614 and WO 05/033244.
- the proportion of the matrix material in the emitting layer is between 50.0 and 99.9% by volume, preferably between 80.0 and 99.5% by volume, particularly preferably between 90.0 and 99.0 Vol .-%. Accordingly, the share of
- Dotands between 0.1 and 50.0 Vo! .-% preferably between 0.5 and 20.0 vol .-%, particularly preferably between 1.0 and 10.0 vol .-%.
- Preferred dopants are selected from the class of monostyrylamines, distyrylamines, tristyrylamines, tetrastyrylamines, styrylphosphines, styryl ethers and arylamines.
- a monostyrylamine is understood as meaning a compound which contains a substituted or unsubstituted styryl group and at least one, preferably aromatic, amine.
- a distyrylamine is understood as meaning a compound which contains two substituted or unsubstituted styryl groups and at least one, preferably aromatic, amine.
- a tristyrylamine is understood as meaning a compound which contains three substituted or unsubstituted styryl groups and at least one, preferably aromatic, amine.
- a tetrastyrylamine is meant a compound containing four substituted or unsubstituted styryl groups and at least one, preferably aromatic, amine.
- the styryl groups are particularly preferred stilbenes, which may also be further substituted.
- Corresponding phosphines and ethers are defined in analogy to the amines.
- An arylamine or an aromatic amine in the context of this invention is understood as meaning a compound which contains three substituted or unsubstituted aromatic or heteroaromatic ring systems bonded directly to the nitrogen.
- At least one of these aromatic or heteroaromatic ring systems is preferably a fused ring system, preferably having at least 14 aromatic ring atoms.
- Preferred examples of these are aromatic anthraceneamines, aromatic anthracenediamines, aromatic pyrenamines, aromatic - 37 -
- Aromatic pyrenamines, pyrenediamines, chrysenamines and chrysenediamines are defined analogously thereto, the diarylamino groups being attached to the pyrene preferably in the 1-position or in the 1,6-position.
- dopants are selected from indenofluorenamines or diamines, for example according to WO 06/122630, benzoindenofluorenamines or diamines, for example according to WO 08/006449, and dibenzoindenofluorenamines or diamines, for example according to WO 07/140847.
- dopants from the class of styrylamines are substituted or unsubstituted tristilbene amines or the dopants described in WO 06/000388, WO 06/058737, WO 06/000389, WO 07/065549 and WO 07/115610.
- Further preferred dopants are aromatic hydrocarbons, such as, for example, the compounds disclosed in the unpublished application DE 102008035413.9.
- the compounds according to formula (1) are used as hole transport material or as hole injection material or as electron blocking material or as exciton blocking material.
- X is preferably N or N (Ar 2)
- the compound is then preferably used in a hole transporting or in a hole injection or in an electron blocking or in an exciton blocking layer
- a hole injection layer in the sense of this invention is A hole transport layer in the sense of this invention is a layer which lies between a hole injection layer and an emission layer If the compounds according to formula (1) are used as hole-transporting or hole-injecting material, it may be preferred if they are combined with electron-accepting compounds - 38 -
- EP 1476881 or EP 1596445 be doped, for example with F 4 -TCNQ or with compounds as described in EP 1476881 or EP 1596445.
- the compound is doped with electron donor compounds.
- a hole blocking layer in the sense of this invention is a layer which lies between an emitting layer and an electron transport layer and directly adjoins the emitting layer.
- repeating units of the formula (1) can also be used either as a polymer backbone, as a hole-transporting unit and / or as an electron-transporting unit.
- the preferred substitution patterns correspond to those described above.
- an organic electroluminescent device characterized in that one or more layers are coated with a sublimation process.
- the materials are vacuum deposited in vacuum sublimation at an initial pressure less than 10 "5 mbar, preferably less than 10 " 6 mbar. It should be noted, however, that the pressure can be even lower, for example less than 10 "7 mbar.
- an organic electroluminescent device characterized in that one or more layers are coated with the OVPD (Organic Vapor Phase Deposition) method or with the aid of a carrier gas sublimation. The materials are applied at a pressure between 10 '5 mbar and 1 bar.
- OVPD Organic Vapor Phase Deposition
- This method is the OVJP (Organic Vapor Jet Printing) process in which the materials are applied directly through a die and patterned (e.g., M.S. Arnold et al., Appl. Phys. Lett., 2008, 92, 053301).
- OVJP Organic Vapor Jet Printing
- an organic electroluminescent device characterized in that one or more layers of solution, such. B. by spin coating, or with any printing process, such.
- any printing process such as screen printing, flexographic printing or offset printing, but more preferably LITI (Light Induced Thermal Imaging, thermal transfer printing) or inkjet printing (ink jet printing), are produced.
- LITI Light Induced Thermal Imaging, thermal transfer printing
- inkjet printing ink jet printing
- soluble compounds are needed. High solubility can be achieved by suitable substitution of the compounds.
- solutions of individual materials can be applied, but also solutions containing several compounds, for example matrix material and dopant.
- the solvents and reagents can be obtained from ALDRICH or ABCR.
- Example 2 Analogously to Example 1, the following compounds according to the invention are obtained from corresponding amines (Examples 2-4). For Example 3, twice the amount of 4- (N-diphenylamino) -phenylboronic acid is used. For example 4, instead of 4- (N-diphenylamino) -phenylboronic acid, 4- (N-phenyl-1-naphthylamino) -phenylboronic acid is used.
- Example 5 Analogously to Example 5, the following compounds according to the invention are obtained from corresponding amines (Examples 6-7):
- Example 8 Analogously to Example 8, the following compounds according to the invention are obtained from corresponding amines (Examples 9 to 11).
- Example 12 Analogously to Example 12, the following compounds according to the invention are obtained from corresponding amines (Examples 13 to 15).
- Electroluminescent devices according to the invention can be prepared as described, for example, in WO 05/003253. In the following, the results of different OLEDs are compared. The basic structure, the materials used, the degree of doping and their layer thicknesses are identical for better comparability.
- the first device example describes a comparison standard according to the prior art in which the emission layer consists of the host material spiro-ketone and the guest material (dopant) Ir (ppy) 3 . Furthermore, OLEDs of different constructions are described, each with the guest material (dopant) lr (ppy) 3 . Analogously to the above-mentioned general method, OLEDs are produced with the following structure:
- HIL Hole Injection Layer 20 nm 2,2 ', 7,7'-tetrakis (di-para-tolylamino) spiro-9,9'-bifluorene - 48 -
- HTL-1 Hole transport layer 1 (HTL-1) 20 nm NPB (N-naphthyl-N-phenyl-4,4 1 -diaminobiphenyl)
- Emission layer 40 nm Host: spiro-ketone (SK) (bis (9,9 '- spirobifluorene-2-yl) ketone) as a comparison of dopant Ir (ppy) 3 (10 vol .-% doping, vapor-deposited; synthesized according to WO 03/0068526); or
- OLEDs are characterized by default; For this purpose, the electroluminescence spectra, the efficiency (measured in cd / A) as a function of the brightness, calculated from current-voltage-brightness characteristics (ILJL characteristics), and the lifetime are determined.
- Table 1 summarizes the results of the device characterization.
- the devices containing the compounds according to the invention show, with significantly improved efficiency, a comparable or, in the mixed-host system (Examples 19 and 20), a significantly improved service life.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
- Indole Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Photovoltaic Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008050841.1A DE102008050841B4 (de) | 2008-10-08 | 2008-10-08 | Neue Materialien für organische Elektrolumineszenzvorrichtungen |
| PCT/EP2009/006556 WO2010040438A1 (de) | 2008-10-08 | 2009-09-10 | Materialien für organische elektrolumineszenzvorrichtungen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2335298A1 true EP2335298A1 (de) | 2011-06-22 |
Family
ID=41138822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09778440A Withdrawn EP2335298A1 (de) | 2008-10-08 | 2009-09-10 | Materialien für organische elektrolumineszenzvorrichtungen |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8637168B2 (de) |
| EP (1) | EP2335298A1 (de) |
| JP (1) | JP5705739B2 (de) |
| KR (1) | KR101699086B1 (de) |
| DE (1) | DE102008050841B4 (de) |
| WO (1) | WO2010040438A1 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI432418B (zh) | 2011-12-19 | 2014-04-01 | Au Optronics Corp | 電子傳輸材料及有機發光元件 |
| EP2749625B1 (de) * | 2012-02-27 | 2017-12-20 | LG Chem, Ltd. | Organische lichtemittierende diode |
| CN105392771B (zh) * | 2013-05-20 | 2019-01-15 | 日产化学工业株式会社 | 三苯胺衍生物及其利用 |
| KR101891432B1 (ko) * | 2016-02-03 | 2018-08-23 | 주식회사 엘지화학 | 아민계 화합물 및 이를 포함하는 유기 전자 소자 |
| CN110156611B (zh) * | 2019-05-23 | 2022-11-11 | 武汉尚赛光电科技有限公司 | 一种苯基枝化发光材料及其有机电致发光器件 |
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2009
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- 2009-09-10 US US13/001,887 patent/US8637168B2/en active Active
- 2009-09-10 EP EP09778440A patent/EP2335298A1/de not_active Withdrawn
- 2009-09-10 JP JP2011530384A patent/JP5705739B2/ja active Active
- 2009-09-10 KR KR1020107028094A patent/KR101699086B1/ko active Active
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| Title |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101699086B1 (ko) | 2017-01-23 |
| US20110108823A1 (en) | 2011-05-12 |
| DE102008050841A1 (de) | 2010-04-15 |
| US8637168B2 (en) | 2014-01-28 |
| JP5705739B2 (ja) | 2015-04-22 |
| JP2012505168A (ja) | 2012-03-01 |
| WO2010040438A1 (de) | 2010-04-15 |
| KR20110068951A (ko) | 2011-06-22 |
| DE102008050841B4 (de) | 2019-08-01 |
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