WO2011032626A1 - Metallkomplexe - Google Patents
Metallkomplexe Download PDFInfo
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- WO2011032626A1 WO2011032626A1 PCT/EP2010/005056 EP2010005056W WO2011032626A1 WO 2011032626 A1 WO2011032626 A1 WO 2011032626A1 EP 2010005056 W EP2010005056 W EP 2010005056W WO 2011032626 A1 WO2011032626 A1 WO 2011032626A1
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- 0 CCC(CC)(**(c(N1CC1)c(*)c(I)c1C)c1-c1c2*)c1c(*)c(*)c2-c1cccc(*Cc2cc(*)cc(*)c2)c1 Chemical compound CCC(CC)(**(c(N1CC1)c(*)c(I)c1C)c1-c1c2*)c1c(*)c(*)c2-c1cccc(*Cc2cc(*)cc(*)c2)c1 0.000 description 6
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/0006—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
- C07F15/0033—Iridium compounds
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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
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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
- H10K85/30—Coordination compounds
- H10K85/341—Transition metal complexes, e.g. Ru(II)polypyridine complexes
- H10K85/342—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising iridium
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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
- 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
- C09K2211/1029—Heterocyclic compounds characterised by ligands containing one nitrogen atom as the heteroatom
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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
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/18—Metal complexes
- C09K2211/185—Metal complexes of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
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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
- H10K2101/10—Triplet emission
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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
- OLEDs organic electroluminescent devices
- OLEDs organic electroluminescent devices
- organometallic complexes which exhibit phosphorescence instead of fluorescence are increasingly being used as emitting materials (M.A. Baldo et al., Appl. Phys. Lett. 1999, 75, 4-6).
- organometallic compounds For quantum mechanical reasons, up to four times the energy and power efficiency is possible using organometallic compounds as phosphorescence emitters.
- organometallic compounds For quantum mechanical reasons, up to four times the energy and power efficiency is possible using organometallic compounds as phosphorescence emitters.
- organometallic compounds as phosphorescence emitters.
- the ligands are often derivatives of phenylpyridine.
- solubility of such complexes is often low, which makes processing from solution difficult or completely impossible. From the prior art iridium complexes are known, which am
- Phenylring of Phenylpyridinliganden in the para position for coordination to the metal with an optionally substituted aryl or heteroaryl group are substituted (WO 2004/026886).
- WO 2004/026886 Phenylring of Phenylpyridinliganden in the para position for coordination to the metal with an optionally substituted aryl or heteroaryl group
- metal chelate complexes have improved solubility and continue to improve the organic electroluminescent zenzvorraum lead, especially in terms of efficiency and life. These metal complexes and organic electroluminescent devices containing these complexes are therefore the subject of the present invention.
- the invention thus relates to a compound according to formula (1),
- R 4 is the same or different at each occurrence H or D;
- n 1, 2 or 3 for M is iridium or rhodium and is 1 or 2 for M is platinum or palladium;
- m is 0, 1, 2, 3 or 4; It is also possible for several ligands L to be linked to one another or L to be linked to L 'via any bridge Z and thus for a tridentate, tetradentate, pentadentate or hexadentate ligand system to be spanned.
- indices n and m are chosen such that the coordination number on the metal for M equals iridium or rhodium 6 and for M equals platinum or palladium 4.
- An aryl group for the purposes of this invention contains 6 to 40 carbon atoms;
- a heteroaryl group contains 2 to 40 C atoms and at least one 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.
- an aryl group or heteroaryl group is either 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, phenanthrene, 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 heteroaryl groups Heteroaryl groups by a non-aromatic unit (preferably less than 10% of the atoms other than H), such as.
- systems such as 9,9'-spirobifluorene, 9,9-diaryl fluorene, triarylamine, diaryl ethers, stilbene, etc. are to be understood as aromatic ring systems in the context of this invention, and also systems in which two or more aryl groups, for example are interrupted by a linear or cyclic alkyl group or by a silyl group.
- a cyclic alkyl, alkoxy or thioalkoxy group is understood as meaning a monocyclic, a bicyclic or a polycyclic group.
- Pentenyl cyclopentenyl, hexenyl, cyclohexenyl, heptenyl, cycloheptenyl, octenyl, cyclooctenyl or cyclooctadienyl understood.
- alkynyl groups include ethynyl, propynyl, butynyl, pentynyl, Hexinyl, heptynyl or octynyl understood.
- a C to C 40 alkoxy group is meant for example methoxy, trifluoromethoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy, s-butoxy, t-butoxy or 2-methylbutoxy.
- aromatic or heteroaromatic ring system having 5-60 aromatic ring atoms, which may be substituted in each case with the abovementioned radicals R and which may be linked via any position on the aromatic or heteroaromatic, are understood, for example, groups which are derived from benzene, Naphthalene, anthracene, benzanthracene, phenanthrene, benzophenanthrene, pyrene, chrysene, perylene, fluoranthene, benzfluoranthene, naphthacene, pentacene, benzpyrene, biphenyl, biphenylene, terphenyl,
- the ring systems formed are aliphatic or aromatic rings fused to the ligand.
- Ring systems are fused cyclohexyl groups or fused phenyl groups.
- radicals which bind to the two different aromatic rings of the ligand that is, for example, to the phenyl group and the pyridine group, form a ring with one another, which can lead, for example, to azafluorene structures or phenanthridine structures.
- M is iridium or platinum. Most preferably, M is iridium. When M is platinum or palladium, the subscript n is 1 or 2.
- the index n 1
- the index m 1
- the index m 2
- the subscript n is 1, 2 or 3, preferably 2 or 3.
- the subscript n 1, there are four more monodentate or two bidentate or one bidentate and two monodentate or one tridentate and one a monodentate or a tetradentate ligand L ', preferably two bidentate ligands L ', coordinated to the metal.
- the index m depending on the ligand L ', is equal to 1, 2, 3 or 4.
- the index n 2
- the symbol X is the same or different at each occurrence for CR 1 . In a further preferred embodiment of the invention, either all symbols X 1 are identical or different at each occurrence for CR 1 , or all symbols X 1 stand for N.
- the symbol V is identical or different at each occurrence for O, S or NR 1 , particularly preferably for S.
- R 4 is H. It is particularly preferred if the abovementioned preferences apply simultaneously. In a particularly preferred embodiment of the invention therefore applies to the symbols used:
- M is iridium or platinum, more preferably indium;
- X is the same or different every occurrence CR 1 ;
- X 1 is chosen so that all X 1 are the same or different at each
- V is the same or different at each occurrence O, S or NR 1 , preferably S;
- R is H.
- the substructures of the formula (2) or (3) are therefore selected from the substructures of the following formulas (4), (5), (6) or (7)
- adjacent radicals R 1 can also form a ring with one another.
- quinoline or isoquinoline structures which are substituted by one or more radicals R 2 are accessible from the pyridine rings.
- the symbol R stands for a straight-chain alkyl group having 1 to 10 C atoms or for a branched or cyclic alkyl group having 3 to 10 C atoms, each containing one or more R 1 may be substituted and wherein one or more non-adjacent CH 2 groups may be replaced by O and wherein one or more H atoms may be replaced by D, F or CN, or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, which may be substituted in each case by one or more radicals R 1 .
- the symbol R is identical or different at each occurrence for an aromatic or heteroaromatic ring system having 5 to 20 aromatic ring atoms, which may be substituted by one or more radicals R 1 .
- the group R is selected from the groups of the following formulas (8) to (24),
- bridging unit 2 which links this ligand L with one or more further ligands L or L '.
- a bridging unit Z is present, so that the ligands have tridentate or polydentate or polypodal character. There may also be two such bridging units Z present. This leads to the formation of macrocyclic ligands or to the formation of cryptates.
- Preferred structures with polydentate ligands or with polydentate ligands are the metal complexes of the following formulas (25) to (28),
- Z preferably represents a bridging moiety containing 1 to 80 atoms selected from the third, fourth, fifth and / or sixth main group (Group 13, 14, 15 or 16 according to IUPAC) or a 3- to 6-membered homo- or heterocycle which covalently connects the partial ligands L with each other or L with L '.
- the bridging unit V can also be constructed asymmetrically, ie the combination of Z to L or L 'does not have to be identical.
- the bridging unit Z may be neutral, single, double or triple negative or single, double or triple positively charged.
- Z is preferably neutral or simple negatively or simply positively charged.
- the charge of Z is preferably chosen so that a total of a neutral complex is formed.
- Z is a trivalent group, ie three ligands L are bridged with one another or two ligands L with L 'or one ligand L with two ligands L', Z is preferably identical or different at each occurrence selected from the group consisting of B, B ( R 2 ) ⁇ , B (C (R 2 ) 2 ) 3 ,
- N (C O) 3 L N (C (R) 2 C (R 2 ) 2 ) 3 , (R 2 ) N (C (R 2 ) 2 C (R 2 ) 2 ) + , P, P (R 2 ) + , PO, PS, PSe, PTe, P (O) 3 , PO (O) 3 , P (OC (R 2 ) 2 ) 3 , PO (OC (R 2 ) 2 ) 3 , P (C (R 2 ) 3 ,
- the other symbols used have the meanings given above.
- Z is a divalent group, ie two ligands L linked to one another or a ligand L bridged by L '
- Formula (33) Formula (34)
- Formula (35) Formula (36) wherein the dashed bonds each indicate the bond to the partial ligands L and L 'and the other symbols used in each case have the meanings listed above.
- ligand groups L are described as they occur in formula (1).
- the ligand groups L 'can also be selected if they are bonded to L via a bridging unit Z.
- the ligands L ' are preferably neutral, monoanionic, dianionic or trianionic ligands, particularly preferably neutral or monoanionic ligands. They may be monodentate, bidentate, tridentate or tetradentate and are preferably bidentate, so preferably have two coordination sites. As described above, the ligands L 'may also be bonded to L via a bridging group Z.
- Preferred neutral, monodentate ligands L ' are selected from carbon monoxide, nitrogen monoxide, alkyl cyanides, such as.
- alkyl cyanides such as.
- amines such as. B. trimethylamine, triethylamine, morpholine, phosphines, in particular halogenophosphines, trialkylphosphines, triarylphosphines or alkylarylphosphines, such as.
- trifluorophosphine trimethylphosphine, tricyclohexylphosphine, Trifferf-butylphosphine, triphenylphosphine, tris (pentafluorophenyl) phosphine, phosphites, such as.
- trimethyl phosphite triethyl phosphite
- arsines such as.
- Trifluorostibine trimethylstibine, tricyclohexylstibin, tri-ferf-butylstibin, triphenylstibin, tris (pentafluorophenyl) stibine, nitrogen-containing heterocycles, such as.
- pyridine pyridazine, pyrazine, pyrimidine, triazine, and carbenes, in particular Arduengo carbenes.
- Propanolate, / ' so-propanolate, tert-butylate, phenolate, aliphatic or aromatic thioalcoholates such.
- Carboxylates such as. Acetate, trifluoroacetate, propionate, benzoate,
- Aryl groups such as. Phenyl, naphthyl, and anionic nitrogen-containing heterocycles such as pyrrolidine, imidazolide, pyrazolide.
- the alkyl groups in these groups are preferably C 2 -C 20 -alkyl groups, particularly preferably C 1 -C 10 -alkyl groups, very particularly preferably C 1 -C 4 -alkyl groups.
- An aryl group is also understood to mean heteroaryl groups. These groups are as defined above.
- Preferred neutral or mono- or dianionic, bidentate or higher-dentate ligands L ' are selected from diamines, such as. Example, ethylene diamine, ⁇ , ⁇ , ⁇ ', ⁇ ' tetramethylethylenediamine, propylenediamine, ⁇ , ⁇ , ⁇ ', ⁇ ' - tetramethylpropylenediamine, cis- or trans-diaminocyclohexane, cis- or trans-N, N, N ' , N'-tetramethyldiaminocyclohexane, imines, such as. B.
- Diphosphines such as, for example, bis-diphenylphosphino methane, bis-diphenylphosphinoethane, bis (diphenylphosphino) propane, bis (diphenylphosphino) butane, bis (dimethylphosphino) methane), bis (dimethylphosphino) ethane, bis (dimethylphosphino) propane, bis (diethylphosphino) methane, bis (diethylphosphino ) ethane, bis (diethylphosphino) propane, bis (di-ferf-butylphosphino) methane, bis (di-ferf-butylphosphino) ethane, bis (fer-butylphosphino) propane, 3-diketonates derived from 1,3-diketones , such as Acetylacetone, benzoylacetone, 1,5,
- Carboxylates derived from aminocarboxylic acids such as.
- pyridine-2-carboxylic acid quinoline-2-carboxylic acid, glycine, ⁇ , ⁇ -dimethylglycine, alanine, ⁇ , ⁇ -dimethylaminoalanine
- salicyliminates derived from salicylimines such as.
- methylsalicylimine, ethylsalicylimine, phenylsalicylimine dialcoholates derived from dialcohols, such as.
- ethylene glycol, 1, 3-propylene glycol and dithiolates derived from dithiols, such as. B. 1, 2-ethylenedithiol, 1, 3-propylenedithiol.
- Preferred tridentate ligands are borates of nitrogen-containing heterocycles, such as. As tetrakis (1-imidazolyl) borate and tetrakis (1-pyrazolyl) borate. Also preferred are bidentate monoanionic ligands L ', which form with the metal a cyclometall believing five-membered or six-membered ring with at least one metal-carbon bond, in particular a cyclometall striv five-membered ring.
- ligands such as are generally used in the field of phosphorescent metal complexes for organic electroluminescent devices, ie ligands of the type phenylpyridine, naphthylpyridine, phenylquinoline, phenylisoquinoline, etc., which may each be substituted by one or more radicals R 1 .
- ligands such as are generally used in the field of phosphorescent metal complexes for organic electroluminescent devices, ie ligands of the type phenylpyridine, naphthylpyridine, phenylquinoline, phenylisoquinoline, etc., which may each be substituted by one or more radicals R 1 .
- ligands such as are generally used in the field of phosphorescent metal complexes for organic electroluminescent devices, ie ligands of the type phenylpyridine, naphthylpyridine, phenylquinoline, phenylisoquinoline, etc.
- ligand L ' for compounds according to formula (1).
- the combination of two groups represented by the following formulas (42) to (69) is particularly suitable for this purpose, one group bonding via a neutral nitrogen atom or a carbene atom and the other group via a negatively charged carbon atom or a negatively charged nitrogen atom binds.
- the ligand L ' may then be formed from the groups of formulas (42) to (69) by each of these groups bonding to each other at the position indicated by #.
- the position at which the groups coordinate to the metal are indicated by *.
- These groups can also be bound to the ligand L via one or two bridging units Z.
- the symbols used have the same meaning as described above, and preferably are a maximum of three symbols X in each group for N, more preferably are a maximum of two symbols X in each group for N, most preferably is a maximum of one symbol X in each group for N.
- all symbols X are identical or different for each occurrence for CR 1 .
- 5- pentamethylcyclopentadienyl, ⁇ 6 - ⁇ or T] 7- cycloheptatrienyl which may each be substituted by one or more radicals R.
- radicals R are identically or differently selected on each occurrence from the group consisting of H, F, Br, CN, B (OR 2 ) 2 , a straight-chain alkyl group having 1 to 6 C atoms, in particular methyl, or a branched or cyclic alkyl group having 3 to 10 carbon atoms, in particular iso-propyl or tert-butyl, wherein one or more H atoms may be replaced by F, or an aromatic or heteroaromatic ring system having 5 to 12 aromatic ring atoms, each by one or several radicals R 2 may be substituted; In this case, several radicals R can also form a mono- or polycyclic, aliphatic, aromatic and / or benzoannellated ring system with one another.
- the metal complexes according to the invention can in principle be prepared by various methods. However, the methods described below have been found to be particularly suitable.
- Another object of the present invention is a process for preparing the metal complex compounds of formula (1) by reacting the corresponding free ligands with metal alkoxides of the formula (74), with metal ketoketonates of the formula (75), with metal halides of the formula ( 76) or with dimeric metal complexes of the formula (77),
- metal compounds in particular iridium compounds, which carry both alcoholate and / or halide and / or hydroxyl and also ketoketonate radicals. These connections can also be loaded.
- iridium compounds which are particularly suitable as starting materials are disclosed in WO 2004/085449.
- the synthesis of the complexes is preferably carried out as in
- Heteroleptic complexes can also be synthesized, for example, according to WO 2005/042548.
- the synthesis can be activated, for example, thermally, photochemically and / or by microwave radiation.
- the compounds according to the invention of formula (1) can be obtained in high purity, preferably more than 99% (determined by means of 1H-NMR and / or HPLC).
- structures 1 to 154 according to the invention can be prepared using the synthesis methods described here.
- An electronic device is understood to mean a device which contains anode, cathode and at least one layer, this layer containing at least one organic or organometallic compound.
- the electronic device according to the invention thus contains anode, Cathode and at least one layer, which at least one
- organic electroluminescent devices OLEDs, PLEDs
- organic integrated circuits O-ICs
- organic field effect transistors O-FETs
- organic thin film transistors O-TFTs
- organic light-emitting Transistors O-LETs
- organic solar cells O-SCs
- organic optical detectors organic photoreceptors
- organic field quench devices O-FQDs
- light-emitting electrochemical cells LOCs
- O-lasers organic laser diodes
- Active components are generally the organic or inorganic materials incorporated between the anode and cathode, for example, charge injection, charge transport or charge blocking materials, but especially emission materials and matrix materials.
- the compounds according to the invention exhibit particularly good properties as emission material in organic electroluminescent devices.
- a preferred embodiment of the invention are therefore organic electroluminescent devices.
- the organic electroluminescent device includes cathode, anode and at least one emitting layer.
- they may also contain further layers, for example one or more hole injection layers, hole transport layers, hole blocking layers, electron transport layers, electron injection layers, exciton blocking layers, charge generation layers and / or organic or inorganic p / n junctions.
- interlayers may be introduced between two emitting layers, which have, for example, an exciton-blocking function and / or the
- the organic electroluminescent device may contain an emitting layer, or it may contain a plurality of emitting layers. If multiple emission layers are present, they preferably have a total of a plurality of emission maxima between 380 nm and 750 nm, so that total white emission results, ie in the emitting layers different emitting compounds are used, which can fluoresce or phosphoresce. Particular preference is given to three-layer systems, the three layers exhibiting blue, green and orange or red emission (for the basic structure, see, for example, WO
- Organic electroluminescent device the compound according to formula (1) or the above-mentioned preferred embodiments as an emitting compound in one or more emitting layers.
- the compound of the formula (1) is used as an emitting compound in an emitting layer, it is preferably used in U.S.P.
- the mixture of the compound according to formula (1) and the matrix material contains between 1 and 99 wt .-%, preferably between 2 and
- the mixture contains between 99 and 1 wt .-%, preferably between 98 and 60 wt .-%, particularly preferably between 97 and 70 wt .-%, in particular between 95 and 75 wt .-% of the matrix material based on the total mixture Emitter and matrix material.
- Suitable matrix materials for the compounds according to the invention are ketones, phosphine oxides, sulfoxides and sulfones, for. B. according to
- Carbazole derivatives indolocarbazole derivatives, e.g. B. according to WO 07/063754 or WO 08/056746, indenocarbazole derivatives, e.g. B. according to the unpublished applications DE 102009023155.2 and DE 02009031021.5, Azacarbazole, z. B. according to EP 1617710, EP 1617711, EP 1731584, JP 2005/347160, bipolar matrix materials, for. B. according to WO 07/137725, silanes, z. B. according to WO 2005/11 72, Azaborole or Boronester, z. B. according to WO 06/117052, triazine derivatives, z. B.
- WO 2010/015306, WO 2007/063754 or WO 2008/056746 zinc complexes, for. B. according to EP 652273 or according to WO 2009/062578, diaza or tetraazasilol derivatives, z. B. according to WO 20 0/054729, diazaphosphole derivatives, for. B. according to WO 2010/054730, or Dibenzofuranderivate, z. B. according to WO 2009/148015.
- a plurality of different matrix materials as a mixture, in particular at least one electron-conducting matrix material and at least one hole-conducting matrix material.
- a preferred combination is, for example, the use of an aromatic ketone, an aromatic phosphine oxide or a triazine with a triarylamine derivative or a carbazole derivative as a mixed matrix for the metal complex according to the invention.
- low work function metals, metal alloys or multilayer structures of various metals are preferable, such as alkaline earth metals, alkali metals, main group metals or lathanoids (eg, Ca, Ba, Mg, Al, In, Mg, Yb, Sm, etc.).
- alkaline earth metals alkali metals
- main group metals or lathanoids eg, Ca, Ba, Mg, Al, In, Mg, Yb, Sm, etc.
- alloys of an alkali or alkaline earth metal and silver for example an alloy of magnesium and silver.
- further metals which have a relatively high work function such as eg. B. Ag, which then usually combinations of metals, such as Mg / Ag, Ca / Ag, or Ba / Ag are used.
- a thin intermediate layer of a material between a metallic cathode and the organic semiconductor with a high dielectric constant may also be preferable to have a thin intermediate layer of a material between a metallic cathode and the organic semiconductor with a high dielectric constant.
- Suitable examples of these are alkali metal or alkaline earth metal fluorides, but also the corresponding oxides or carbonates (eg LiF, Li 2 O, BaF 2 , MgO, NaF, CsF, Cs 2 CO 3 , etc.).
- the layer thickness of this layer is preferably between 0.5 and 5 nm.
- the anode high workfunction materials are preferred.
- the anode has a work function greater than 4.5 eV. Vacuum up.
- metals with a high redox potential such as Ag, Pt or Au, are suitable for this purpose.
- electrodes z. B. AI / Ni / NiO Xl AI / PtO x
- metal / metal oxide may be preferred, metal / metal oxide.
- at least one of the electrodes must be transparent or partially transparent to allow either the irradiation of the organic material (O-SC) or the outcoupling of light (OLED / PLED, O-LASER).
- Preferred anode materials for transparent or partially transparent anodes are conductive mixed metal oxides. Particularly preferred are indium tin oxide (ITO) or indium zinc oxide (IZO).
- conductive, doped organic materials in particular conductive doped polymers.
- the device is structured accordingly (depending on the application), contacted and finally hermetically sealed because the life of such devices drastically shortened in the presence of water and / or air.
- an organic electroluminescent device characterized in that one or more layers are coated with a sublimation process.
- 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 "applied 5 mbar and 1 bar.
- OVJP organic vapor jet printing
- the materials are applied directly through a nozzle and patterned (eg. BMS Arnold et al., Appl. Phys. Lett., 2008, 92, 053301).
- an organic electroluminescent device characterized in that one or more layers of solution, such. B. by spin coating, or with any printing process such.
- screen printing flexographic printing, offset printing, LITI (Light Induced Thermal Imaging, thermal transfer printing), ink-jet printing (ink jet printing) or Nozzle Printing, are produced. Since the invention
- Compounds of formula (1) have a very good solubility in organic solvents, they are particularly well suited for processing from solution.
- the compounds according to the invention are therefore preferably processed from solution.
- the organic electroluminescent device can also be manufactured as a hybrid system by applying one or more layers of solution and depositing one or more other layers.
- a hybrid system by applying one or more layers of solution and depositing one or more other layers.
- Suitable and preferred solvents are, for example, toluene, anisole, o-, m- or p-xylene, methyl benzoate, dimethylanisole, mesitylene, tetralin, veratrole, THF, methyl THF, THP, chlorobenzene, dioxane or mixtures of these solvents.
- Another object of the present invention is therefore a solution or a formulation containing at least one compound according to formula (1) and one or more solvents, in particular organic solvents. How such solutions can be prepared is known to the person skilled in the art and described, for example, in WO 2002/072714, WO 2003/019694 and the literature cited therein.
- the electronic devices according to the invention are distinguished by the following surprising advantages over the prior art:
- the compounds of formula (1) have a very good solubility in a variety of common organic solvents and are therefore very well suited for processing from solution.
- the compounds according to the invention have a higher solubility than the related compounds described in the prior art
- Compounds according to formula (1) as emitting materials have an excellent lifetime. In particular, the lifetime is better than related prior art compounds.
- the educts 1, 2, 10 and 11 and solvents can be obtained commercially, for example from ALDRICH.
- Compound 4, compound 15 and compound 17 can be prepared according to WO 2002/068435 or analogously to the process described in WO 2002/068435.
- Compound 7 can be analogous to J. Mater. Chem. 2007, 77, 3714-3719.
- Potassium acetate is suspended in 800 ml of dimethylsulfoxide 4.24 g (5.2 mmol) of 1,1-bis (diphenylphosphino) ferrocene-palladium (II) * DCM are added to this suspension, and the reaction mixture is heated under reflux for 16 h 600 ml of ethyl acetate and 400 ml of water are added and the organic phase is separated off, washed three times with 200 ml of water, dried with sodium sulphate and then concentrated to dryness The crude product is recrystallised from heptane and finally dried under reduced pressure The yield is 34.5 g (80 mmol), corresponding to 46.1% of theory.
- the synthesis is analogous to the synthesis of compound 6.
- the yield is 6.52 g (3.8 mmol), corresponding to 65.6% of theory.
- TMM-1 (synthesized according to WO 2010/015306) and TMM-2 (synthesized according to WO 2009/124627), and the compounds according to the invention TEG-2 to TEG-4 and TER-2 and TER 4 are shown below for the sake of clarity.
- TMM-1 TMM-2 Inventive materials can be used from solution, resulting in much simpler devices with nevertheless good properties. The production of such components leans against the
- PLEDs polymeric light-emitting diodes
- TMG-1, TER-1 and TER-3 soluble comparative compounds
- the typical solids content of such solutions is between 16 and 25 g / L, if, as here, the typical for a device layer thickness of 80 nm is to be achieved by spin coating.
- Fig. 1 shows the typical structure of such a device, wherein for red emitting device, the composition 48 wt .-% TMM-1, 48 wt .-% TMM-2 and 4 wt.% TER is used.
- ITO substrates and the material for the so-called buffer layer are commercially available (ITO from Technoprint and others, PEDOT: PSS as aqueous dispersion Clevios Baytron P from HC Starck).
- the interlayer used is the hole injection; in this case, HIL-012 was from Merck
- the emission layer is spin-coated in an inert gas atmosphere, in the present case argon, and baked at 120 ° C. for 10 minutes. Finally, a cathode of barium and aluminum is evaporated in vacuo.
- a hole blocking layer and / or an electron transport layer can also be applied by vapor deposition between the emitting layer and the cathode, and the interlayer can also be replaced by one or more layers which merely have to fulfill the condition by the downstream processing step of the deposition the emissive layer of solution can not be peeled off again.
- the devices are characterized by default, the mentioned OLED examples are not yet optimized.
- Table 1 summarizes the data obtained. In the case of the processed devices, it is evident here that the materials according to the invention are superior to those previously available in terms of efficiency and / or lifetime.
- Table 1 Results with solutions processed from solution in the device configuration of FIG. 1 or the abovementioned composition for red emitting devices
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Abstract
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Priority Applications (15)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012529135A JP5902089B2 (ja) | 2009-09-16 | 2010-08-18 | 金属錯体 |
| CN201080041117.4A CN102498121B (zh) | 2009-09-16 | 2010-08-18 | 金属络合物 |
| KR1020177024599A KR20170104008A (ko) | 2009-09-16 | 2010-08-18 | 금속 착물 |
| DE112010003663.2T DE112010003663B4 (de) | 2009-09-16 | 2010-08-18 | Metallkomplexe |
| US13/395,473 US9212198B2 (en) | 2009-09-16 | 2010-08-18 | Metal complexes |
| KR1020127009779A KR101979460B1 (ko) | 2009-09-16 | 2010-08-18 | 금속 착물 |
| CN201080066572.XA CN102869672B (zh) | 2010-05-03 | 2010-11-26 | 制剂和电子器件 |
| CN201610304110.6A CN105949177B (zh) | 2010-05-03 | 2010-11-26 | 制剂和电子器件 |
| KR1020177025255A KR101886595B1 (ko) | 2010-05-03 | 2010-11-26 | 제형물 및 전자 소자 |
| PCT/EP2010/007176 WO2011137922A1 (de) | 2010-05-03 | 2010-11-26 | Formulierungen und elektronische vorrichtungen |
| KR1020127031417A KR101778825B1 (ko) | 2010-05-03 | 2010-11-26 | 제형물 및 전자 소자 |
| JP2013508376A JP5837051B2 (ja) | 2010-05-03 | 2010-11-26 | 配合物および電子デバイス |
| EP10788016.3A EP2566875B1 (de) | 2010-05-03 | 2010-11-26 | Formulierungen und elektronische vorrichtungen |
| US14/837,724 US9882135B2 (en) | 2010-05-03 | 2015-08-27 | Formulations and electronic devices |
| US15/846,480 US10490747B2 (en) | 2010-05-03 | 2017-12-19 | Formulations and electronic devices |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009041414A DE102009041414A1 (de) | 2009-09-16 | 2009-09-16 | Metallkomplexe |
| DE102009041414.2 | 2009-09-16 |
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| WO2011032626A1 true WO2011032626A1 (de) | 2011-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/EP2010/005056 Ceased WO2011032626A1 (de) | 2009-09-16 | 2010-08-18 | Metallkomplexe |
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| Country | Link |
|---|---|
| US (1) | US9212198B2 (de) |
| JP (1) | JP5902089B2 (de) |
| KR (2) | KR20170104008A (de) |
| CN (1) | CN102498121B (de) |
| DE (2) | DE102009041414A1 (de) |
| TW (1) | TWI638819B (de) |
| WO (1) | WO2011032626A1 (de) |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101979460B1 (ko) | 2019-05-16 |
| DE102009041414A1 (de) | 2011-03-17 |
| JP2013504608A (ja) | 2013-02-07 |
| KR20120081603A (ko) | 2012-07-19 |
| US9212198B2 (en) | 2015-12-15 |
| DE112010003663B4 (de) | 2024-09-12 |
| US20120175561A1 (en) | 2012-07-12 |
| JP5902089B2 (ja) | 2016-04-13 |
| TW201124422A (en) | 2011-07-16 |
| DE112010003663A5 (de) | 2012-10-11 |
| CN102498121B (zh) | 2015-11-25 |
| TWI638819B (zh) | 2018-10-21 |
| CN102498121A (zh) | 2012-06-13 |
| KR20170104008A (ko) | 2017-09-13 |
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