WO2022184601A1 - Verbindungen für organische elektrolumineszenzvorrichtungen - Google Patents
Verbindungen für organische elektrolumineszenzvorrichtungen Download PDFInfo
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- WO2022184601A1 WO2022184601A1 PCT/EP2022/054903 EP2022054903W WO2022184601A1 WO 2022184601 A1 WO2022184601 A1 WO 2022184601A1 EP 2022054903 W EP2022054903 W EP 2022054903W WO 2022184601 A1 WO2022184601 A1 WO 2022184601A1
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- aromatic
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- carbon atoms
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- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- ZLTPDFXIESTBQG-UHFFFAOYSA-N isothiazole Chemical compound C=1C=NSC=1 ZLTPDFXIESTBQG-UHFFFAOYSA-N 0.000 description 1
- CTAPFRYPJLPFDF-UHFFFAOYSA-N isoxazole Chemical compound C=1C=NOC=1 CTAPFRYPJLPFDF-UHFFFAOYSA-N 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- AUHZEENZYGFFBQ-UHFFFAOYSA-N mesitylene Substances CC1=CC(C)=CC(C)=C1 AUHZEENZYGFFBQ-UHFFFAOYSA-N 0.000 description 1
- 125000001827 mesitylenyl group Chemical group [H]C1=C(C(*)=C(C([H])=C1C([H])([H])[H])C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- 229940095102 methyl benzoate Drugs 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003136 n-heptyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- KSCKTBJJRVPGKM-UHFFFAOYSA-N octan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCCCCCC[O-].CCCCCCCC[O-].CCCCCCCC[O-].CCCCCCCC[O-] KSCKTBJJRVPGKM-UHFFFAOYSA-N 0.000 description 1
- 125000004365 octenyl group Chemical group C(=CCCCCCC)* 0.000 description 1
- VXNSQGRKHCZUSU-UHFFFAOYSA-N octylbenzene Chemical compound [CH2]CCCCCCCC1=CC=CC=C1 VXNSQGRKHCZUSU-UHFFFAOYSA-N 0.000 description 1
- 125000005069 octynyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C#C* 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- WCPAKWJPBJAGKN-UHFFFAOYSA-N oxadiazole Chemical compound C1=CON=N1 WCPAKWJPBJAGKN-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- UQPUONNXJVWHRM-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 UQPUONNXJVWHRM-UHFFFAOYSA-N 0.000 description 1
- SLIUAWYAILUBJU-UHFFFAOYSA-N pentacene Chemical compound C1=CC=CC2=CC3=CC4=CC5=CC=CC=C5C=C4C=C3C=C21 SLIUAWYAILUBJU-UHFFFAOYSA-N 0.000 description 1
- 125000006340 pentafluoro ethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 description 1
- 125000002255 pentenyl group Chemical group C(=CCCC)* 0.000 description 1
- 125000005981 pentynyl group Chemical group 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 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
- 239000012071 phase Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- DLRJIFUOBPOJNS-UHFFFAOYSA-N phenetole Chemical compound CCOC1=CC=CC=C1 DLRJIFUOBPOJNS-UHFFFAOYSA-N 0.000 description 1
- 229960005323 phenoxyethanol Drugs 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 125000002568 propynyl group Chemical group [*]C#CC([H])([H])[H] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- CPNGPNLZQNNVQM-UHFFFAOYSA-N pteridine Chemical compound N1=CN=CC2=NC=CN=C21 CPNGPNLZQNNVQM-UHFFFAOYSA-N 0.000 description 1
- GDISDVBCNPLSDU-UHFFFAOYSA-N pyrido[2,3-g]quinoline Chemical compound C1=CC=NC2=CC3=CC=CN=C3C=C21 GDISDVBCNPLSDU-UHFFFAOYSA-N 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 150000003246 quinazolines Chemical class 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 238000006798 ring closing metathesis reaction Methods 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- MFRIHAYPQRLWNB-UHFFFAOYSA-N sodium tert-butoxide Chemical compound [Na+].CC(C)(C)[O-] MFRIHAYPQRLWNB-UHFFFAOYSA-N 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical compound C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 235000021286 stilbenes Nutrition 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 238000005092 sublimation method Methods 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- IFLREYGFSNHWGE-UHFFFAOYSA-N tetracene Chemical compound C1=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C21 IFLREYGFSNHWGE-UHFFFAOYSA-N 0.000 description 1
- 150000003536 tetrazoles Chemical class 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 description 1
- YGPLLMPPZRUGTJ-UHFFFAOYSA-N truxene Chemical compound C1C2=CC=CC=C2C(C2=C3C4=CC=CC=C4C2)=C1C1=C3CC2=CC=CC=C21 YGPLLMPPZRUGTJ-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 238000002061 vacuum sublimation Methods 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
- ABDKAPXRBAPSQN-UHFFFAOYSA-N veratrole Chemical compound COC1=CC=CC=C1OC ABDKAPXRBAPSQN-UHFFFAOYSA-N 0.000 description 1
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- 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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- 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
- C07D471/02—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 two hetero rings
- C07D471/04—Ortho-condensed systems
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
- C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
- C07D487/04—Ortho-condensed systems
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- C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
- C07D487/12—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains three hetero rings
- C07D487/14—Ortho-condensed systems
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
- C07D491/12—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains three hetero rings
- C07D491/14—Ortho-condensed systems
- C07D491/147—Ortho-condensed systems the condensed system containing one ring with oxygen as ring hetero atom and two rings with nitrogen as ring hetero atom
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- C07D—HETEROCYCLIC COMPOUNDS
- C07D495/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
- C07D495/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
- C07D495/04—Ortho-condensed systems
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D495/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
- C07D495/12—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains three hetero rings
- C07D495/14—Ortho-condensed systems
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D519/00—Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups C07D453/00 or C07D455/00
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
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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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- 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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- 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
- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
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- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
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- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
- H10K85/622—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing four rings, e.g. pyrene
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- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
- H10K85/624—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing six or more rings
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- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
- H10K85/626—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
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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
- H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
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- 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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- H10K85/00—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
- H10K85/654—Aromatic compounds comprising a hetero atom comprising only nitrogen as heteroatom
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- H10K85/649—Aromatic compounds comprising a hetero atom
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- 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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- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6574—Polycyclic condensed heteroaromatic hydrocarbons comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
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- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6576—Polycyclic condensed heteroaromatic hydrocarbons comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene
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- 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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- 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 compounds which are suitable for use in electronic devices, in particular in organic electroluminescent devices, and electronic devices, in particular organic electroluminescent devices, containing these materials.
- phosphorescent organometallic complexes are frequently used as emitting materials. For quantum mechanical reasons, up to four times the energy and power efficiency is possible when using organometallic compounds as phosphorescence emitters.
- organometallic compounds as phosphorescence emitters.
- electroluminescent devices in particular also in the case of electroluminescent devices which exhibit triplet emission (phosphorescence).
- the properties of phosphorescent electroluminescent devices are not only determined by the triplet emitters used.
- the other materials used, such as matrix materials, are also of particular importance here. Improvements in these materials can therefore also lead to significant improvements in the properties of the electroluminescent devices.
- JP 2000/156288 describes quinazoline derivatives which can be used as matrix materials for phosphorescent emitters.
- the object of the present invention is therefore to provide compounds which are suitable for use in an organic electronic device, in particular in an organic electroluminescent device, and which, when used in this device lead to good device properties, as well as the provision of the corresponding electronic device.
- the object of the present invention to provide connections that lead to a long service life, good efficiency and low operating voltage.
- the properties of the matrix materials in particular also have a significant influence on the service life and the efficiency of the organic electroluminescent device.
- a further object of the present invention can be seen as providing compounds which are suitable for use in a phosphorescent or fluorescent electroluminescent device, in particular as a matrix material.
- the compounds particularly when used as matrix materials, as electron transport materials or as hole-blocking materials in organic electroluminescent devices, should lead to devices which have excellent color purity.
- the electronic devices should be able to be used or adapted for many purposes.
- the performance of the electronic devices should be maintained over a wide temperature range. It has surprisingly been found that certain compounds described in more detail below solve this problem, are well suited for use in electroluminescent devices and lead to improvements in the organic electroluminescent device, in particular in relation to the service life, the color purity, the efficiency and the operating voltage. These compounds and electronic devices, in particular organic electroluminescent devices, which contain such compounds are therefore the subject matter of the present invention.
- the present invention relates to a compound comprising at least one structure of the formula (I), preferably a compound of the formula (I), where the following applies to the symbols and indices used:
- W is O or S, preferably O;
- Z 1 represents X 2 or the group Z 1 forms with the group Z 2 a fused ring A 1 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms;
- Z 2 represents X 2 or the group Z 2 forms with the group Z 1 a fused ring A 1 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms, or the group Z 2 forms with the group Z 3 is a fused ring A 2 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms;
- Z 3 represents X 2 or the group Z 3 forms a fused ring A 2 with the group Z 2 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms, or the group Z 3 forms with the group Z 4 is a fused ring A 3 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms;
- Z 4 represents X 2 or the group Z 4 forms with the group Z 3 a fused ring A 3 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms;
- X is identical or different on each occurrence for N or CR, preferably for N;
- X 1 is identical or different on each occurrence for N or CR 1 , preferably for CR 1 , with the proviso that not more than two of the groups X 1 in a cycle are N;
- X 2 is identical or different on each occurrence for N or CR 2 ;
- a 1 , A 2 , A 3 is the same or different on each occurrence and is an aromatic or heteroaromatic ring system with 5 to 40 aromatic ring atoms, which has radicals R 3 , the aromatic or heteroaromatic ring system having two connected C-
- Atoms are connected to the further groups of the structure set out in formula (I), it being possible for two adjacent groups A 1 , A 2 , A 3 to form a fused ring system with one another;
- R is the same or different on each occurrence H, D, F, CI, Br, I,
- R 4 C C(R 4 ) 2 , N(R 4 ) 2 , N(Ar') 2 , CN, NO 2 , OR 4 , OAr', SR 4 , SAr',
- a radical R with another radical preferably a group R 2 , R 3
- R 1 is the same or different on each occurrence, H, D, F, CI, Br, I
- R 4 C C(R 4 ) 2 , N(R 4 ) 2 , N(Ar') 2 , CN, NO 2 , OR 4 , OAr', SR 4 , SAr',
- R 1 is not such a ring system, the formation of an aromatic or heteroaromatic ring system being ruled out by two radicals R 1 ;
- R 2 is the same or different on each occurrence, H, D, F, CI, Br, I,
- R 4 C C(R 4 ) 2 , N(R 4 ) 2 , N(Ar') 2 , CN, NO 2 , OR 4 , OAr', SR 4 , SAr',
- Ar' is identical or different on each occurrence, an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, which has radicals R 4 , preferably an aryl group having 6 to 30 aromatic ring atoms or one
- Heteroaryl group with 5 to 14 aromatic ring atoms which has radicals R 4 ;
- arylheteroarylamino, diheteroarylamino group has R 5 groups; two or more radicals R 4 together can form an aromatic, heteroaromatic, aliphatic or heteroaliphatic ring system, preferably an aliphatic ring system, and the radicals R 4 particularly preferably do not form such a ring system
- R 5 is identical or different on each occurrence and is H, D, F or an aliphatic, aromatic or heteroaromatic organic radical, in particular a hydrocarbon radical, having 1 to 20 carbon atoms, in which one or more H atoms can also be replaced by F , two or more radicals R 5 can form a ring system with one another; wherein the structure according to formula (I) has at least one ring A 1 , A 2 , A 3 formed by at least two adjacent groups selected from the groups Z 1 , Z 2 , Z 3 and Z 4 , and at least one of the radicals R, R 1 , R 2 , R 3 is selected from the group consisting of a heteroaromatic ring system having 6 to 60 aromatic ring atoms, which has radicals R 4 , an aromatic Ring system with 10 to 60 aromatic ring atoms, which has radicals R 4 , an aryloxy group with 10 to 60 aromatic ring atoms or heteroaryloxy group with 6 to 40 aromatic ring atoms, each having radicals R
- the groups R 1 , R 2 , R 3 have R 4 radicals, where the R 4 radical can be H. If R 4 is not H, the radical R 4 represents a substituent, so that the groups R 1 , R 2 , R 3 can be substituted by radicals R 4 . This clarification applies accordingly to the other groups and radicals.
- the group Z 1 can form a fused ring A 1 with the group Z 2 , which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms.
- the group Z 1 forms a fused ring A 1 with the group Z 2
- two adjacent carbon atoms of the fused ring form A 1 with the groups Z 3 , Z 4 and the nitrogen atom and the C bonded to the group X -Atom a 6-membered ring as shown in formula (I).
- the expression “with the other groups of the 6-ring” refers to the atoms and groups Z 3 , Z 4 set out above.
- Two radicals R 2 or a radical R 2 with a further radical, preferably a group R, R 3 can together form an aromatic, heteroaromatic, aliphatic or heteroaliphatic ring system. If a ring system is formed, this is preferably formed by two radicals R 2 , a fused ring system being formed. This also applies to the other radicals, in particular to two radicals R 1 .
- the compounds according to the invention comprise a structure of the formulas (II-1) to (II-7), where the compounds according to the invention can particularly preferably be selected from the compounds of the formulas (II-1) to (II-7), where the symbols W, X, X 1 , X 2 , A 1 , A 2 and A 3 have the meanings mentioned above, in particular for formula (I). Structures/compounds of the formulas (II-1) to (II-4) are preferred here.
- the rings of the formulas A 1 , A 2 and A 3 can be represented by structures of the formulas (KAr-1) or (KAr-2).
- X 3 represents N or CR 3 , preferably CR 3 , with the proviso that no more than two of the groups X 3 in a cycle represent N
- Y represents O, S, NR 3 , NAr' or C (R 3 ) 2 , preferably NAr′, where Ar′ and R 3 have the meanings mentioned above, in particular for formula (I), and the dashed bonds represent the attachment points of the ring to the other groups in formula (I) or (II-1) to (II-7), the carbon atoms connected to the dashed bonds representing the groups Z 1 , Z 2 , Z 3 , Z 4 set out in the structure of formula (I).
- At least one group X 2 is N, with the group Z 3 preferably being X 2 ⁇ N.
- the structure has at least two, preferably at least three, nitrogen atoms, these nitrogen atoms preferably representing ring atoms, these nitrogen atoms particularly preferably not being adjacent and very particularly preferably the structure not having two adjacent nitrogen atoms.
- An aryl group within the meaning of this invention contains 6 to 40 carbon atoms; a heteroaryl group within the meaning of this invention contains 2 to 40 carbon atoms and at least one heteroatom, with the proviso that the sum of carbon atoms and heteroatoms is at least 5.
- the heteroatoms are preferably selected from N, 0 and/or S.
- An aryl group or heteroaryl group is either a simple aromatic cycle, i.e. benzene, or a simple heteroaromatic cycle, for example pyridine, pyrimidine, thiophene, etc.
- aryl or heteroaryl group for example naphthalene, anthracene, phenanthrene, quinoline, isoquinoline, etc.
- aromatics linked to one another by a single bond such as biphenyl, are not referred to as aryl or heteroaryl groups, but as aromatic ring systems.
- An electron-deficient heteroaryl group in the context of the present invention is a heteroaryl group which has at least one heteroaromatic six-membered ring with at least one nitrogen atom. Further aromatic or heteroaromatic five-membered rings or six-membered rings can be fused onto this six-membered ring. Examples of electron-poor heteroaryl groups are pyridine, pyrimidine, pyrazine, pyridazine,
- An aromatic ring system within the meaning of this invention contains 6 to 60 carbon atoms in the ring system.
- a heteroaromatic ring system within the meaning of this invention contains 2 to 60 carbon atoms and at least one heteroatom in the ring system, with the proviso that the sum of carbon atoms and heteroatoms is at least 5.
- the heteroatoms are preferably selected from N, O and/or S.
- An aromatic or heteroaromatic ring system in the context of this invention is to be understood as meaning a system which does not necessarily only contain aryl or heteroaryl groups, but in which also several aryl or heteroaryl groups by a non-aromatic moiety such as B. a C, N or 0 atom may be connected.
- systems such as fluorene, 9,9'-spirobifluorene, 9,9-diarylfluorene, triarylamine, diaryl ether, stilbene, etc. should also be understood as aromatic ring systems for the purposes of this invention, and also systems in which two or more Aryl groups are connected, for example, by a short alkyl group.
- the aromatic ring system is preferably selected from fluorene, 9,9'-spirobifluorene, 9,9-diarylamine or groups in which two or more aryl and/or fleteroaryl groups are linked to one another by single bonds.
- an aliphatic hydrocarbon radical or an alkyl group or an alkenyl or alkynyl group which can contain 1 to 20 carbon atoms, and which also contains individual Fl atoms or CH 2 groups, are represented by the groups mentioned above can be substituted, preferably the radicals methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, s-butyl, t-butyl, 2-methylbutyl, n-pentyl, s-pentyl, neo-pentyl , cyclopentyl, n-flexyl, neo-flexyl, cyclohexyl, n-heptyl, cycloheptyl, n-octyl, cyclooctyl, 2-ethylhexyl, trifluoromethyl, pentafluoroethyl, 2,
- An alkoxy group having 1 to 40 carbon atoms is preferably methoxy, trifluoromethoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy, s-butoxy, t-butoxy, n-pentoxy, s- pentoxy, 2-methylbutoxy, n-flexoxy, cyclohexyloxy, n-fleptoxy, cycloheptyloxy, n-octyloxy, cyclooctyloxy, 2-ethylhexyloxy, pentafluoroethoxy and 2,2,2-trifluoroethoxy.
- a thioalkyl group with 1 to 40 carbon atoms is, in particular, methylthio, ethylthio, n-propylthio, i-propylthio, n-butylthio, i-butylthio, s-butylthio, t-butylthio, n-pentylthio, s-pentylthio, n-flexylthio, cyclohexylthio, n-heptylthio, cycloheptylthio, n-octylthio, cyclooctylthio, 2-ethylhexylthio, trifluoromethylthio, pentafluoroethylthio, 2,2,2-trifluoroethylthio, ethenylthio, propenylthio, butenylthio, pentenylthio, cyclopentenylthio
- my alkyl, alkoxy or thioalkyl groups can be straight-chain, branched or cyclic, it being possible for one or more non-adjacent CH 2 groups to be replaced by the groups mentioned above; furthermore, one or more H atoms can also be replaced by D, F, Cl, Br, I, CN or NO2, preferably F, Cl or CN, more preferably F or CN, particularly preferably CN.
- An aromatic or heteroaromatic ring system with 5 - 60 or 5 to 40 aromatic ring atoms, which can be substituted in each case with the abovementioned radicals and which can be linked via any positions on the aromatic or fleteroaromatic is understood to mean, in particular, groups derived from benzene, naphthalene, anthracene, benzanthracene, phenanthrene, pyrene, chrysene, perylene, fluoranthene, naphthacene, pentacene, benzopyrene, biphenyl, biphenylene, terphenyl, triphenylene, fluorene, spirobifluorene, dihydrophenanthrene, dihydropyrene, tetrahydropyrene, cis- or trans-indeno-fluorene, cis- or trans-indenocarbazole, cis- or trans-indolocarbazole, trux
- 1,2,4-triazole benzotriazole, 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, 1,2,3 -Thiadiazole, 1,2,4-thiadiazole, 1,2,5-thiadiazole, 1,3,4-thiadiazole, 1,3,5-triazine, 1,2,4-triazine, 1,2 ,3-t riazine, tetrazole,
- the compounds according to the invention can preferably comprise at least one structure of the formulas (111-1) to (111-11) and are particularly preferably selected from the compounds of the formulas (111-1) to (111-11),
- groups X 1 , X 3 are N, preferably all groups X 1 , X 3 are CR1 or CR 3 stand, where preferably not more than 6, particularly preferably not more than 4 and especially preferably not more than 2 of the groups CR 1 or CR 3 for which X 1 or X 3 stand are different from the group CH.
- the compounds according to the invention comprise a structure of the formulas (IV-1) to (IV-11), where the compounds according to the invention can particularly preferably be selected from the compounds of the formulas (IV-1) to (IV-11), where the symbols R 1 , R 2 , R 3 and X 2 have the meanings mentioned above, in particular for formula (I), the symbol Y has the meanings mentioned above, in particular for formula (KAr-1) and (KAr-2).
- the index m is 0, 1, 2, 3 or 4, preferably 0, 1 or 2, where preferably at least one group X 2 is N, particularly preferably exactly one group X 2 is N. Structures/compounds of the formula (IV-1) are preferred here, and structures/compounds of the formula (IV-1) where X 2 is N are particularly preferred.
- the index m is 0, 1, 2, 3 or 4, preferably 0, 1 or 2. If the index m is less than 4, the respective rings have a corresponding number of Fl atoms. It should be noted here that the groups R 1 , R 2 , R 3 can represent Fl. Therefore, if the index m is not equal to 0, these rings preferably have substituents R 1 , R 2 , R 3 . This means that the corresponding groups R 1 , R 2 , R 3 are preferably a radical other than H. The preferences set out above and below for the corresponding groups R 1 , R 2 , R 3 apply here. This clarification applies correspondingly to the other groups, radicals such as R 4 , R 5 , R 6 , R 7 , R 8 and/or R 9 , and indices, in particular to n, I and r.
- the compounds according to the invention comprise a structure of the formulas (V-1) to (V-5), in which case the compounds according to the invention can particularly preferably be selected from the compounds of the formulas (V-1) to (V-5),
- the index m is 0, 1, 2, 3 or 4, preferably 0, 1 or 2.
- the sum of the indices m is preferably at most 6, particularly preferably at most 4 and particularly preferably at most 2. This applies, inter alia, to structures/compounds of the formulas (IV-1) to (IV-11) and (V-1) to (V -5). It is preferred here that at least one of the radicals R 1 , R 2 and R 3 explicitly shown represents a group which is not equal to H, so that there is substitution at this point. Explicitly represented residues are not represented by the index m, but indicate the substitution point on the ring. Particularly preferably, at least two of the radicals R 1 , R 2 and R 3 shown explicitly represent a group which is not equal to H.
- At least one radical R 1 , R 2 and/or R 3 in formula (VI-1) stands for an aromatic or heteroaromatic ring system with 5 to 60 aromatic ring atoms, preferably with 5 to 40 aromatic ring atoms, each having R 4 radicals.
- R 1 , R 2 and/or R 3 in formula (VI-1) stands for an aromatic or heteroaromatic ring system with 5 to 60 aromatic ring atoms, preferably with 5 to 40 aromatic ring atoms, each having R 4 radicals.
- R 1 , R 2 and/or R 3 in formula (VI-1) stands for an aromatic or heteroaromatic ring system with 5 to 60 aromatic ring atoms, preferably with 5 to 40 aromatic ring atoms, each having R 4 radicals.
- heteroaromatic ring systems having 6 to 60 aromatic ring atoms and/or aromatic ring systems having 10 to 60 aromatic ring atoms.
- the compounds according to the invention comprise a structure of the formula (VI-1), in which case the compounds according to the invention can be particularly preferably selected from the compounds of the formula where the symbols R 1 , R 3 and R 4 have the meanings given above, in particular for formula (I), and the index I is 0, 1, 2, 3, 4 or 5, preferably 0, 1 or 2.
- At least one of the radicals R 1 and R 3 explicitly shown preferably represents a group which is not equal to F1, so that there is substitution at this point.
- at least two of the radicals R 1 and R 3 shown explicitly represent a group which is not equal to H.
- particular preference is given to heteroaromatic ring systems having 6 to 60 aromatic ring atoms and/or aromatic ring systems having 10 to 60 aromatic ring atoms.
- two adjacent R 1 groups do not form a fused aromatic or heteroaromatic ring system with the groups to which the R 1 groups are attached, this including the R 4 or R 5 groups, by which the R 1 groups may be substituted.
- radicals which can be selected in particular from R, R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 and/or R 9 , form a ring system with one another, this can be mono- or polycyclic , aliphatic, heteroaliphatic, aromatic or heteroaromatic.
- the radicals which form a ring system with one another can be adjacent, ie these radicals are attached to the same carbon atom or to carbon atoms which are bonded directly to one another, or they can be further apart.
- the ring systems provided with the substituents R, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 and/or R 9 can also be connected to one another via a bond, so that a Ring closure can be effected.
- X 4 is identical or different on each occurrence and is CR 4 , N or C if the group [Ar 1 ] p is bonded thereto, preferably CR 4 , with preferably no NN bonds being present;
- X 5 is identical or different on each occurrence and is CR 4 or N, preferably N;
- R, R 1 , R 2 and/or R 3 are selected identically or differently on each occurrence from the group consisting of H, D or an aromatic or heteroaromatic ring system selected from the groups of the following formulas Ar-1 to Ar-79, preferably at least one group R, R 1 , R 2 and/or R 3 is selected identically or differently from the groups of the following formulas Ar-1 to Ar-79 and/or the group Ar' is identical or different each occurrence is selected from the groups of the following formulas Ar-1 to Ar-79, where R 4 has the meanings given above, the dashed bond represents the bond to the corresponding group and the following also applies: Ar 1 is identical or different on each occurrence, a divalent aromatic or heteroaromatic ring system having 6 to 18 aromatic ring atoms, which each has R 4 groups;
- Group A is bonded and radicals R 4 are bonded to the corresponding carbon atoms instead.
- the substituent R 4 which is bonded to the nitrogen atom is preferably an aromatic or heteroaromatic ring system having 5 to 24 aromatic ring atoms, which can also be substituted by one or more R 5 radicals.
- this substituent R 4 is identical or different distinguished at each occurrence for an aromatic or heteroaromatic ring system with 6 to 24 aromatic ring atoms, in particular with 6 to 18 aromatic ring atoms, which has no fused aryl groups and which has no fused heteroaryl groups in which two or more aromatic or heteroaromatic 6 -Ring groups are fused directly to one another, has, and which in each case can also be substituted by one or more radicals R 5 .
- phenyl, biphenyl, terphenyl and quaterphenyl with linkage patterns as listed above for Ar-1 to Ar-11 it being possible for these structures to be substituted by one or more R 5 radicals instead of R 4 , but they are preferably unsubstituted.
- Triazine, pyrimidine and quinazoline are also preferred, as listed above for Ar-47 to Ar-50, Ar-57 and Ar-58, it being possible for these structures to be substituted by one or more R 5 radicals instead of by R 4 .
- the substituents R 4 bonded to this carbon atom are preferably identical or different each time they occur for a linear alkyl group having 1 to 10 carbon atoms or for a branched or cyclic alkyl group 3 to 10 carbon atoms or an aromatic or heteroaromatic ring system having 5 to 24 aromatic ring atoms, which can also be substituted by one or more R 5 radicals.
- R 4 is very particularly preferably a methyl group or a phenyl group.
- the R 4 radicals can also form a ring system with one another, which leads to a spiro system.
- R, R 1 , R 2 and R 3 are the same or different on each occurrence selected from the group consisting of H, D, F, CN, NO2, Si(R 4 )3, B(OR 4 )2, a straight-chain alkyl group having 1 to 20 carbon atoms or a branched or cyclic alkyl group having 3 to 20 carbon atoms, it being possible for each alkyl group to be substituted by one or more radicals R 4 , or an aromatic or heteroaromatic ring system with 5 to 60 aromatic Ring atoms, preferably having 5 to 40 aromatic ring atoms, each of which may be substituted by one or more R 4 radicals.
- R, R 1 , R 2 and R 3 are identical or different on each occurrence selected from the group consisting of H, D, F, a straight-chain alkyl group having 1 to 20 carbon atoms or a branched or cyclic alkyl group having 3 to 20 carbon atoms, where each alkyl group may be substituted by one or more R 4 radicals, or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, preferably having 5 to 40 aromatic ring atoms, each may be substituted by one or more R 4 radicals.
- R, R 1 , R 2 and R 3 are the same or different on each occurrence selected from the group consisting of H, D, an aromatic or heteroaromatic ring system having 6 to 30 aromatic ring atoms, which with one or several radicals R 4 can be substituted, or a group N(Ar')2.
- R, R 1 , R 2 are particularly preferably selected identically or differently on each occurrence from the group consisting of H or an aromatic or heteroaromatic ring system having 6 to 24 aromatic ring atoms, preferably having 6 to 18 aromatic ring atoms, particularly preferably having 6 to 13 aromatic ring atoms, each of which may be substituted by one or more R 4 radicals.
- Preferred aromatic or heteroaromatic ring systems which can preferably be represented by the radicals R, R 1 , R 2 , R 3 or Ar', are selected from phenyl, biphenyl, in particular ortho-, meta- or para-biphenyl, terphenyl , In particular ortho-, meta-, para- or branched terphenyl, quaterphenyl, in particular ortho-, meta-, para- or branched quaterphenyl, fluorene, which can be linked via the 1-, 2-, 3- or 4-position can, spirobifluorene, which can be linked via the 1-, 2-, 3- or 4-position, naphthalene, in particular 1- or 2- linked naphthalene, indole, benzofuran, benzothiophene, carbazole, which can be linked via the 1-, 2- , 3- or 4-position can be linked, dibenzofuran, which can be linked via the 1-, 2-, 3- or 4-position, Dibenzothiophene
- Ar-1 to Ar-79 listed above are particularly preferred, with structures of the formulas (Ar-1), (Ar-2), (Ar-3), (Ar-12), (Ar-13), ( Ar-14), (Ar-15), (Ar-16), (Ar-40), (Ar-41), (Ar-47) (Ar-57), (Ar-69), (Ar-70 ), (Ar-75), (Ar-76), preferred and structures of formulas (Ar-1), (Ar-2), (Ar-3), (Ar-12), (Ar-13), ( Ar-14), (Ar-15), (Ar-16), (Ar-57), (Ar-47) are particularly preferred.
- R, R 1 , R 2 and R 3 are groups of the formula -Ar 4 -N (Ar 2 ) (Ar 3 ), where Ar 2 , Ar 3 and Ar 4 are identical or different on each occurrence for an aromatic or heteroaromatic ring system having 5 to 24 aromatic ring atoms, each of which may be substituted by one or more R 4 radicals.
- the total number of aromatic ring atoms of Ar 2 , Ar 3 and Ar 4 is a maximum of 60 and preferably a maximum of 40.
- Ar 4 and Ar 2 can be connected to one another and/or Ar 2 and Ar 3 can also be connected to one another by a group selected from C(R 4 )2, NR 4 , O or S can be connected.
- Ar 4 and Ar 2 are preferably linked to one another or Ar 2 and Ar 3 to one another in each case ortho to the position of the linkage to the nitrogen atom. In another embodiment of the invention, none of the groups Ar 2 , Ar 3 and Ar 4 are linked to each other.
- Ar 4 is preferably an aromatic or heteroaromatic ring system having 6 to 24 aromatic ring atoms, preferably having 6 to 12 aromatic ring atoms, which can each be substituted by one or more R 4 radicals.
- Ar 4 is particularly preferably selected from the group consisting of ortho-, meta- or para-phenylene or ortho-, meta- or para-biphenyl, which can each be substituted by one or more radicals R 4 , but are preferably unsubstituted. Most preferably Ar 4 is an unsubstituted phenylene group.
- Ar 2 and Ar 3 are preferably identical or different on each occurrence and are an aromatic or heteroaromatic ring system having 6 to 24 aromatic ring atoms, which can each be substituted by one or more R 4 radicals. Particularly preferred groups Ar 2 and Ar 3 are selected identically or differently on each occurrence from the group consisting of ortho-, meta- or para-phenylene or ortho-, meta- or para-biphenyl, which can each be substituted by
- benzene ortho-, meta- or para-biphenyl, ortho-, meta-, para- or branched terphenyl, ortho-, meta-, para- or branched quaterphenyl, 1-, 2-, 3- or 4-fluorenyl, 1-, 2-, 3- or 4-spirobifluorenyl, 1- or 2-naphthyl, indole, benzofuran, benzothiophene, 1-, 2-, 3- or 4-carbazole, 1-, 2- , 3- or 4-dibenzofuran, 1-, 2-, 3- or 4-dibenzothiophene, indenocarbazole, indolocarbazole, 2-, 3- or 4-pyridine, 2-,
- Ar 2 and Ar 3 are very particularly preferably the same or different on each occurrence selected from the group consisting of benzene, biphenyl, in particular ortho-, meta- or para-biphenyl, terphenyl, in particular ortho-, meta-, para- or branched ter - phenyl, quaterphenyl, in particular ortho-, meta-, para- or branched quaterphenyl, fluorene, in particular 1-, 2-, 3- or 4-fluorene, or spirobifluorene, in particular 1-, 2-, 3- or 4- -spirobifluorene.
- R 4 is selected identically or differently on each occurrence from the group consisting of H, D, F, CN, a straight-chain alkyl group having 1 to 10 carbon atoms or a branched or cyclic alkyl group having 3 to 10 carbon atoms, it being possible for the alkyl group to be substituted by one or more R 2 radicals, or an aromatic or heteroaromatic ring system having 6 to 24 aromatic ring atoms, each of which can be substituted by one or more R 5 radicals.
- R 4 is identical or different on each occurrence selected from the group consisting of H, a straight-chain alkyl group having 1 to 6 carbon atoms, in particular having 1, 2, 3 or 4 carbon atoms, or a branched or cyclic alkyl group with 3 to 6 carbon atoms, where the alkyl group can be substituted with one or more radicals R 5 , but is preferably unsubstituted, or an aromatic or heteroaromatic ring system with 6 to 13 aromatic ring atoms, each of which may be substituted by one or more R 5 radicals, but is preferably unsubstituted.
- R 5 is the same or different on each occurrence of H, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms which is substituted with an alkyl group having 1 to 4 carbon atoms may be, but is preferably unsubstituted.
- the alkyl groups preferably have no more than five carbon atoms, particularly preferably no more than 4 carbon atoms, very particularly preferably no more than 1 carbon atom.
- alkyl groups in particular branched alkyl groups, having up to 10 carbon atoms or which are substituted with oligoarylene groups, for example ortho-, meta-, para- or branched terphenyl - or quaterphenyl groups, are substituted.
- the compound has exactly two or exactly three structures of the formulas (I), (11-1) to (II-7), (111-1) to (111-11), (IV-1) to (IV-11), (V-1) to (V-5) and/or (VI-1), where preferably one of the aromatic or heteroaromatic ring systems which is formed by at least one of the groups R 1 , R 2 , R 3 or to which the groups R 1 , R 2 , R 3 bind is shared by both structures.
- the compound comprises a connecting group via which exactly two or three structures of the formulas (I), (11-1) to (II-7), (111-1) to (111-11), (IV-1) to (IV-11), (V-1) to (V-5) and/or (VI-1) are connected to each other.
- These linking groups are preferably derived from groups defined for the groups R 1 , R 2 , R 3 , but with one or two hydrogen atoms being replaced by bonding sites.
- a compound according to the invention can comprise structures of the formulas (I), (II-1) to (II-7), (III-1) to (III-11), (IV-1) to (IV-11) , (V-1) to (V-5) and/or (VI-1) as
- oligomer, polymer or dendrimer where instead of one Hydrogen atom or a substituent one or more bonds of the compounds to the polymer, oligomer or dendrimer are present.
- the compounds of the formula (I) or the preferred embodiments are used as matrix material for a phosphorescent emitter or in a layer which is directly adjacent to a phosphorescent layer, it is furthermore preferred if the compound does not contain any Contains fused aryl or heteroaryl groups in which more than two six-membered rings are fused directly to one another. An exception to this are phenanthrene and triphenylene, which can be preferred due to their high triplet energy despite the presence of fused aromatic six-membered rings.
- preferred compounds according to the invention are characterized in that they can be sublimated. These compounds generally have a molecular weight of less than about 1200 g/mol.
- the basic structure of the compounds according to the invention can be represented according to the routes outlined in the following schemes.
- the individual synthesis steps such as CC coupling reactions according to Suzuki, CN coupling reactions according to Buchwald or Hartwig-Buchwald or cyclization reactions, are known in principle to the person skilled in the art. Further information on the synthesis of the compounds according to the invention can be found in the synthesis examples. Possible syntheses of the basic structure are shown in Schemes 1 to 13.
- Scheme 15 The meaning of the symbols used in Schemes 1 to 17 essentially corresponds to that which was defined for formula (I), numbering and a complete representation of all symbols being omitted for reasons of clarity.
- the use of the symbol X to represent possible nitrogen atoms in the heteroaromatic rings, such as these in particular in formulas (I), (II-1) to (II-7) and/or (III- 1) to (111-11) are set forth by the symbols X 1 , X 2 and X 3 .
- a further subject of the present invention is therefore a process for preparing a compound according to the invention, a nitrogen-containing aromatic or heteroaromatic compound being reacted in a ring-forming reaction.
- Formulations of the compounds according to the invention are required for the processing of the compounds according to the invention from the liquid phase, for example by spin coating or by printing processes. These formulations can be, for example, solutions, dispersions or emulsions. It may be preferable to use mixtures of two or more solvents for this. Appropriate and preferred
- solvents examples include toluene, anisole, o-, m- or p-xylene, methyl benzoate, mesitylene, tetralin, veratrol, THF, methyl THF, THP, chlorobenzene, dioxane, phenoxytoluene, especially 3-phenoxytoluene, (- )- fenchone, 1,2,3,5-tetramethylbenzene, 1,2,4,5-tetramethylbenzene, 1-methylnaphthalene, 2-methylbenzothiazole, 2-phenoxyethanol, 2-pyrrolidinone, 3-
- a further object of the present invention is therefore a formulation or a composition containing at least one compound according to the invention and at least one further compound.
- the further connection can be, for example, a solvent, in particular one of the abovementioned solvents or a mixture of these solvents. If the further compound comprises a solvent, then this mixture is referred to herein as a formulation.
- the further compound can also be at least one further organic or inorganic compound which is also used in the electronic device, for example an emitting compound and/or a further matrix material. Suitable emitting compounds and other matrix materials are listed below in connection with the organic electroluminescent device.
- the further connection can also be polymeric.
- Another subject of the present invention is the use of a compound comprising at least one structure of the formula (Ia), preferably a compound of the formula (Ia), where the following applies to the symbols and indices used: W is O or S, preferably O;
- Z 1 represents X 2 or the group Z 1 forms with the group Z 2 a fused ring A 1 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms;
- Z 2 represents X 2 or the group Z 2 forms with the group Z 1 a fused ring A 1 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms, or the group Z 2 forms with the group Z 3 is a fused ring A 2 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms;
- Z 3 represents X 2 or the group Z 3 forms a fused ring A 2 with the group Z 2 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms, or the group Z 3 forms with the group Z 4 is a fused ring A 3 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms;
- Z 4 represents X 2 or the group Z 4 forms with the group Z 3 a fused ring A 3 which is linked to the other groups of the 6-membered ring via two adjacent carbon atoms;
- X is identical or different on each occurrence for N or CR, preferably for N;
- X 1 is identical or different on each occurrence for N or CR 1 , preferably for CR 1 , with the proviso that not more than two of the groups X 1 in a cycle are N;
- X 2 is identical or different on each occurrence for N or CR 2 ;
- a 1 , A 2 , A 3 is identical or different on each occurrence, an aromatic or heteroaromatic ring system with 5 to 40 aromatic ring atoms, which has radicals R 3 , where the aromatic tical or heteroaromatic ring system is connected to the other groups of the structure set out in formula (I) via two bonded carbon atoms, it being possible for two adjacent groups A 1 , A 2 , A 3 to form a fused ring system with one another;
- R 1 is identical or different on each occurrence Fl, D, F, CI, Br, I, R 4 C ⁇ C(R 4 ) 2 , N(R 4 ) 2 , N(Ar′) 2 , CN, NO 2 , OR 4 , OAr', SR 4 , SAr',
- R 4 has, or an aryloxy or heteroaryloxy group of 5 to 40 aromatic ring atoms, each having radicals R 4 , or a diarylamino, arylheteroarylamino, diheteroarylamino group having 5 to 60 aromatic ring atoms in the respective aromatic or heteroaromatic radical, the diarylamino, arylheteroarylamino, diheteroarylamino group having radicals R 4 ; two radicals R.sup.2 or one radical R.sup.2 with another radical, preferably a group R, R.sup.3 , can also form an aromatic, heteroaromatic, aliphatic or heteroaliphatic ring system with one another, the radicals R.sup.2 preferably not forming such a ring system;
- R 4 has, or an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms, each having R 4 radicals, or a diarylamino, arylheteroarylamino, diheteroarylamino group having 5 to 60 aromatic ring atoms in the respective aromatic or heteroaromatic radical, the diarylamino ,
- arylheteroarylamino, diheteroarylamino group has R 4 groups; two radicals R 3 or one radical R 3 with another radical, preferably a group R, R 2 can also form an aromatic, heteroaromatic, aliphatic or heteroaliphatic ring system with one another, the radicals R 3 preferably not forming such a ring system; Ar' is identical or different on each occurrence, an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, which has radicals R 4 , preferably an aryl group having 6 to 30 aromatic ring atoms or one
- Heteroaryl group with 5 to 14 aromatic ring atoms which has radicals R 4 ;
- R 5 is identical or different on each occurrence and is H, D, F or an aliphatic, aromatic or heteroaromatic organic radical, in particular a hydrocarbon radical, having 1 to 20 carbon atoms, in in which one or more H atoms can also be replaced by F, in which case two or more radicals R 5 can form a ring system with one another; wherein the structure according to formula (Ia) has at least one ring A 1 , A 2 , A 3 which is formed by at least two adjacent groups selected from the groups Z 1 , Z 2 , Z 3 and Z 4 ; in an electronic device, in particular in an organic electroluminescent device.
- Yet another subject matter of the present invention is an electronic device containing at least one compound comprising at least one structure of the formula (Ia), preferably a compound of the formula (Ia), where the symbols and indices used have the meaning mentioned above, in particular for formula (Ia), and the structure according to formula (Ia) has at least one ring A 1 , A 2 , A 3 which is selected from the groups Z 1 , Z 2 , Z 3 , and Z 4 is formed.
- An electronic device within the meaning of the present invention is a device which contains at least one layer which contains at least one organic compound.
- the component can also contain inorganic materials or also layers that are made up entirely of inorganic materials.
- OLEDs organic electroluminescent devices
- sOLEDs organic light-emitting diodes
- PLEDs organic light-emitting diodes based on polymers
- LECs organic laser diodes
- O-ICs organic integrated circuits
- O-FETs organic field-effect transistors
- O-TFTs organic thin-film transistors
- O-LETs organic light-emitting transistors
- O-SCs organic solar cells
- O-Detectors organic photoreceptors
- O-FQDs organic field quench devices
- organic electrical sensors preferably organic electroluminescent devices (OLEDs, sOLED, PLEDs, LECs, etc.), particularly preferably organic light-emitting diodes (OLEDs), organic light-emitting diodes based on small molecules (sOLEDs), organic light-emitting diodes based on polymers (PLEDs), in particular phosphorescent OLEDs.
- the organic electroluminescent device contains cathode, anode and at least one emitting layer. In addition to these layers, it can 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, electron-blocking layers and/or charge-generation layers. Likewise, interlayers can be introduced between two emitting layers, which have an exciton-blocking function, for example. It however, it should be noted that each of these layers need not necessarily be present. In this case, the organic electroluminescent device can contain an emitting layer, or it can contain a plurality of emitting layers.
- a plurality of emission layers are present, these preferably have a total of a plurality of emission maxima between 380 nm and 750 nm, resulting in white emission overall, ie different emitting compounds which can fluoresce or phosphorescence are used in the emitting layers.
- Systems with three emitting layers are particularly preferred, with the three layers showing blue, green and orange or red emission.
- the organic electroluminescent device according to the invention can also be a tandem electroluminescent device, in particular for white-emitting OLEDs.
- connection according to the invention can be used in different layers, depending on the exact structure. Preference is given to an organic electroluminescent device containing a compound comprising at least one structure according to formula (Ia) or (I) or the preferred embodiments listed above in an emitting layer as matrix material for phosphorescent emitters or for emitters that have TADF (thermally activated delayed fluorescence) show, especially for phosphorescent emitters.
- the compound according to the invention can also be used in an electron transport layer and/or in a hole blocking layer in an electron blocking layer, preferably in an electron transport layer.
- the compound according to the invention is particularly preferred as a matrix material for phosphorescent emitters, in particular for red, orange, green or yellow, preferably red or green phosphorescent emitters, in an emitting layer or as an electron transport material in a
- Electron transport layer used, particularly preferably as a matrix material in an emitting layer.
- the compound according to the invention is used as a matrix material for a phosphorescent compound in an emitting layer, it is preferably used in combination with one or more phosphorescent decorative materials (triplet emitters) are used.
- Phosphorescence within the meaning of this invention is understood as meaning luminescence from an excited state with a higher spin multiplicity, ie a spin state >1, in particular from an excited triplet state.
- all luminescent complexes with transition metals or lanthanides, in particular all iridium, platinum and copper complexes are to be regarded as phosphorescent compounds.
- the mixture of the compound according to the invention and the emitting compound contains between 99 and 1% by volume, preferably between 98 and 10% by volume, particularly preferably between 97 and 60% by volume, in particular between 95 and 80% by volume. -% of the compound according to the invention based on the total mixture of emitter and matrix material.
- the mixture contains between 1 and 99% by volume, preferably between 2 and 90% by volume, particularly preferably between 3 and 40% by volume, in particular between 5 and 20% by volume, of the emitter, based on the total mixture emitter and matrix material.
- the compound according to the invention is used as the only matrix material (“single host”) for the phosphorescent emitter.
- a further embodiment of the present invention is the use of a compound comprising at least one structure according to formula (Ia), (I) or a preferred embodiment thereof as matrix material for a phosphorescent emitter in combination with a further matrix material.
- a further matrix material which is used in addition to a compound comprising at least one structure according to formula (Ia), (I) or a preferred embodiment, is at least partially referred to below as co-host.
- Suitable matrix materials which can be used in combination with the compounds according to the invention are aromatic ketones, aromatic phosphine oxides or aromatic sulfoxides or sulfones, e.g. B.
- a further phosphorescent emitter which emits at a shorter wavelength than the actual emitter, can also be present in the mixture as a co-host. Particularly good results are achieved when a red phosphorescent emitter is used as the emitter and a yellow phosphorescent emitter is used as the co-host in combination with the compound according to the invention.
- a compound can be used as a co-host that does not participate, or does not participate to a significant extent, in charge transport, as described, for example, in WO 2010/108579.
- suitable co-matrix material are compounds which have a large band gap and do not themselves participate, or at least not to a significant extent, in the charge transport of the emitting layer.
- Such materials are preferably pure hydrocarbons. Examples of such materials can be found, for example, in WO 2009/124627 or in WO 2010/006680.
- co-host materials which can be used in combination with a compound comprising at least one structure according to formula (Ia) or a preferred embodiment thereof, in particular compounds comprising at least one structure according to formula (I), are compounds according to one of Formulas (H-1), (H-2), (H-3), (H-4) or (H-5), where the following applies to the symbols and indices used:
- C ⁇ O, NR 7 , O, S or CONR 7 can be replaced, or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, preferably having 5 to 40 aromatic ring atoms, each of which has R 7 radicals ;
- two radicals R 6 can also form an aromatic, heteroaromatic, aliphatic or heteroaliphatic ring system with one another, the radicals R 6 preferably not forming such a ring system;
- Ar is identical or different on each occurrence, an aromatic or heteroaromatic ring system with 5 to 40 aromatic ring atoms, which has radicals R 7 ;
- a 1 is C(R 7 ) 2 , NR 7 , O or S;
- Ar 5 is the same or different on each occurrence and is an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, which has R 7 radicals; R 7 is identical or different on each occurrence H, D, F, CI, Br, I,
- R 8 where one or more non-adjacent CH 2 groups can be replaced by Si(R 8 ) 2 , C ⁇ O, NR 8 , O, S or CONR 8 , or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms , each of which has R 8 radicals; two or more radicals R 7 together can be aromatic, heteroaromatic, aliphatic or hetero- form an aliphatic ring system, preferably the radicals R 7 do not form such a ring system;
- R 8 is identical or different on each occurrence and is H, D, F or an aliphatic, aromatic or heteroaromatic organic radical, in particular a hydrocarbon radical, having 1 to 20 carbon atoms, in which one or more H atoms can also be replaced by F ;
- v is identical or different on each occurrence and is 0, 1, 2, 3 or 4, preferably 0 or 1 and very preferably 0;
- t is the same or different on each occurrence and is 0, 1, 2 or 3, preferably 0 or 1 and very preferably 0;
- u is the same or different on each occurrence and is 0, 1 or 2, preferably 0 or 1 and very preferably 0.
- the sum of the indices v, t and u in compounds of the formulas (H-1), (H-2), (H-3), (H-4) or (H-5) is preferably at most 6, particularly preferably at most 4 and especially preferably at most 2.
- R 6 is the same or different on each occurrence selected from the group consisting of H, D, F, CN, NO2, Si(R 7 )3, B(OR 7 )2, a straight-chain alkyl group with 1 to 20 carbon atoms or a branched or cyclic alkyl group having 3 to 20 carbon atoms, where each alkyl group can be substituted by one or more radicals R 7 , or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms having 5 to 40 aromatic ring atoms, each of which may be substituted by one or more R 7 radicals.
- R 6 is identical or different on each occurrence selected from the group consisting of H, D, F, a straight-chain alkyl group having 1 to 20 carbon atoms or a branched or cyclic alkyl group having 3 to 20 carbon atoms.
- Atoms, the alkyl group each having one or more radicals R 7 can be substituted, or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, preferably having 5 to 40 aromatic ring atoms, which can each be substituted by one or more R 7 radicals.
- R 6 is identical or different on each occurrence selected from the group consisting of H, D, an aromatic or heteroaromatic ring system having 6 to 30 aromatic ring atoms, which can be substituted by one or more radicals R 7 , or a group
- R 6 is particularly preferably the same or different on each occurrence selected from the group consisting of H or an aromatic or heteroaromatic ring system having 6 to 24 aromatic ring atoms, preferably having 6 to 18 aromatic ring atoms, particularly preferably having 6 to 13 aromatic ring atoms, each of which may be substituted by one or more R 7 radicals.
- Preferred aromatic or heteroaromatic ring systems represented by the groups R 6 or Ar′′ are selected from phenyl, biphenyl, in particular ortho-, meta- or para-biphenyl, terphenyl, in particular ortho-, meta-, para- or branched Terphenyl, quaterphenyl, in particular ortho-, meta-, para- or branched quaterphenyl, fluorene, which can be linked via the 1-, 2-, 3- or 4-position, spirobifluorene, which can be linked via the 1-, 2-, 3- or 4-position can be linked, naphthalene, in particular 1- or 2-linked naphthalene, indole,
- Benzofuran, benzothiophene, carbazole which can be linked via the 1-, 2-, 3- or 4-position, dibenzofuran, which can be linked via the 1-, 2-, 3- or 4-position, dibenzothiophene, which via the 1-, 2-, 3- or 4-position can be linked, indenocarbazole, indolocarbazole, pyridine, pyrimidine, pyrazine, pyridazine, triazine, quinoline,
- the structures Ar-1 to Ar-79 listed above are particularly preferred, with structures of the formulas (Ar-1), (Ar-2), (Ar-3), (Ar-12), (Ar-13), ( Ar-14), (Ar-15), (Ar-16), (Ar-69), (Ar-70), (Ar-75) preferred and structures of formulas (Ar-1), (Ar-2) , (Ar-3), (Ar-12), (Ar-13), (Ar-14), (Ar-15), (Ar-16) are particularly preferred.
- R 6 are groups of the formula -Ar 4 -N(Ar 2 )(Ar 3 ), where Ar 2 , Ar 3 and Ar 4 are identical or different on each occurrence for an aromatic or heteroaromatic ring system having 5 to 24 aromatic matic ring atoms, each of which may be substituted by one or more R 4 radicals.
- the total number of aromatic ring atoms of Ar 2 , Ar 3 and Ar 4 is a maximum of 60 and preferably a maximum of 40.
- Other preferences for the groups Ar 2 , Ar 3 and Ar 4 have been explained above and apply accordingly.
- the substituent R 7 which is bonded to the nitrogen atom is preferably an aromatic or heteroaromatic ring system having 5 to 24 aromatic ring atoms, which can also be substituted by one or more R 8 radicals.
- this substituent R 7 is identical or different on each occurrence for an aromatic or heteroaromatic ring system with 6 to 24 aromatic ring atoms, in particular with 6 to 18 aromatic ring atoms, which has no fused aryl groups and which has no fused fleteroaryl groups in which two or more aromatic or heteroaromatic 6-ring groups are fused directly to one another, and which in each case can also be substituted by one or more radicals R 8 .
- phenyl, biphenyl, terphenyl and quaterphenyl with linkage patterns as listed above for Ar-1 to Ar-11 these Structures can be substituted by one or more radicals R 8 instead of by R 4 , but are preferably unsubstituted.
- Triazine, pyrimidine and quinazoline are also preferred, as listed above for Ar-47 to Ar-50, Ar-57 and Ar-58, it being possible for these structures to be substituted by one or more R 8 radicals instead of by R 4 .
- the substituents R 7 bonded to this carbon atom are preferably identical or different on each occurrence and are a linear alkyl group having 1 to 10 carbon atoms or a branched or cyclic alkyl group with 3 to 10 carbon atoms or for an aromatic or heteroaromatic ring system with 5 to 24 aromatic ring atoms, which can also be substituted by one or more radicals R 8 .
- R 7 is very particularly preferably a methyl group or a phenyl group.
- the R 7 radicals can also form a ring system with one another, which leads to a spiro system.
- Preferred aromatic or heteroaromatic ring systems Ar 5 are selected from phenyl, biphenyl, in particular ortho-, meta- or para-biphenyl, terphenyl, in particular ortho-, meta-, para- or branched terphenyl, quaterphenyl, in particular ortho-, meta-, para- or branched quaterphenyl, fluorene, which can be linked via the 1-, 2-, 3- or 4-position, spirobifluorene, which can be linked via the 1-, 2-, 3- or 4-position, Naphthalene, in particular 1- or 2-linked naphthalene, indole, benzofuran, benzothiophene, carbazole, which can be linked via the 1-, 2-, 3- or 4-position, dibenzofuran, which can be linked via the 1-, 2- , 3- or 4-position, dibenzothiophene, which can be linked via the 1-, 2-, 3- or 4-position, indenocarbazole, indolocarbazole,
- the groups Ar 5 are particularly preferably selected independently of one another from the groups of the formulas Ar-1 to Ar-79 set out above, with structures of the formulas (Ar-1), (Ar-2), (Ar-3), (Ar -12), (Ar-13), (Ar-
- R 7 is selected identically or differently on each occurrence from the group consisting of H, D, F, CN, a straight-chain alkyl group having 1 to 10 carbon atoms or a branched or cyclic alkyl group having 3 to 10 carbon atoms, it being possible for the alkyl group to be substituted by one or more R 8 radicals, or an aromatic or heteroaromatic ring system having 6 to 24 aromatic ring atoms, each of which can be substituted by one or more R 8 radicals.
- R 7 is identical or different on each occurrence selected from the group consisting of H, a straight-chain alkyl group having 1 to 6 carbon atoms, in particular having 1, 2, 3 or 4 carbon atoms, or a branched or cyclic alkyl group having 3 to 6 carbon atoms, where the alkyl group may be substituted by one or more R 8 radicals, but is preferably unsubstituted, or an aromatic or heteroaromatic ring system having 6 to 13 aromatic ring atoms, each of which is substituted by one or more radicals R 8 may be substituted, but is preferably unsubstituted.
- R 8 is identical or different on each occurrence and is H, an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 10 carbon atoms which is substituted with an alkyl group having 1 to 4 carbon atoms may be, but is preferably unsubstituted.
- Preferred embodiments of the compounds of the formulas (H-1) or (H-2) are the compounds of the following formulas (H-1a) or (H-2a),
- R 6 , Ar 5 and A 1 have the meanings mentioned above, in particular for formula (H-1) or (H-2).
- a 1 in formula (Fl-2a) is C(R 7 )2.
- Preferred embodiments of the compounds of the formulas (H-1a) or (F1-2a) are the compounds of the following formulas (H-1b) or (H-2b),
- R 6 , Ar 5 and A 1 have the meanings mentioned above, in particular for formula (H-1) or (H-2).
- a 1 in formula (H-2b) is C(R 7 )2.
- PCT/EP2020/074320 entitled “Materials for organic electroluminescent devices” on pages 69 to 73 are shown as examples of compounds according to formula (6), (7), (8), (9) or (10). These compounds are incorporated herein by reference for disclosure purposes.
- a further object of the present invention is therefore a composition containing at least one compound comprising at least one structure according to formula (Ia) or the preferred embodiments thereof set out above, in particular compound comprising at least one structure according to formula (I), and at least one other matrix material, wherein the further matrix material is selected from compounds according to one of the formulas (H-1), (H-2), (H-3), (H-4) or (H-5).
- the compound according to the invention comprising at least one structure according to formula (Ia) is used as matrix material for phosphorescent emitters in combination with a further matrix material which is selected from compounds according to one of the formulas (H-1), (H-2), (H-3), (H-4) or (H-5). Accordingly, preference is given to electronic devices in which the compound comprising at least one structure of the formula (Ia) is used as matrix material for phosphorescent emitters in combination with a further matrix material which is selected from compounds according to one of the formulas (H-1), (H -2), (H-3), (H-4) or (H-5).
- composition comprises at least one compound comprising at least one structure according to formula (Ia) or the preferred ones set out above
- Embodiments in particular compounds comprising at least one structure according to formula (I), and at least one compound according to one of the formulas (H-1), (H-2), (H-3), (H-4) or (H-5 ) consists. These compositions are particularly suitable as so-called premix mixtures, which can be vaporized together.
- (H-3), (H-4) or (H-5) can be used individually or as a mixture of two, three or more compounds of different structures.
- the compound comprising at least one structure according to formula (Ia) or the preferred embodiments thereof set out above, in particular compounds comprising at least one structure according to formula (I), preferably has a mass fraction in the composition in the range from 10% by weight to 95% by weight. %, preferably in the range from 15% by weight to 90% by weight, and very preferably in the range from 40% by weight to 70% by weight, based on the total mass of the Composition.
- Compounds comprising at least one structure of the formula (Ia) can be used individually or as a mixture of two, three or more compounds.
- the compounds according to one of the formulas (H-1), (H-2), (H-3), (H-4) or (H-5) in the composition have a mass fraction in the range of 5 Wt% to 90 wt%, preferably in the range of 10 wt% to 85 wt%, more preferably in the range of 20 wt% to 85 wt%, even more preferably in the range of 30% to 80% by weight, more preferably in the range of 20% to 60% by weight and most preferably in the range of 30% to 50% by weight on the entire composition.
- the composition consists exclusively of compounds of the formula (Ia) or their preferred embodiments described above and one of the other matrix materials mentioned, preferably compounds according to at least one of the formulas (H-1), (H-2), ( H-3), (H-4) or (H-5).
- Particularly suitable phosphorescent compounds are compounds which, when suitably excited, emit light, preferably in the visible range, and also at least one atom with an atomic number greater than 20, preferably greater than 38 and less than 84, particularly preferably greater than 56 and less than 80 included, in particular a metal with this atomic number.
- the phosphorescence emitters used are preferably compounds which contain copper, molybdenum, tungsten, rhenium, ruthenium, osmium, rhodium, iridium, palladium, platinum, silver, gold or europium, in particular compounds which contain iridium or platinum.
- WO 2010/099852 WO 2010/102709, WO 2011/032626, WO 2011/066898, WO 2011/157339, WO 2012/007086, WO 2014/008982,
- WO 2016/124304 WO 2017/032439 and WO 2018/011186.
- all phosphorescent complexes are suitable as are used according to the prior art for phosphorescent electroluminescent devices and as are known to the person skilled in the field of organic electroluminescence, and the person skilled in the art can use further phosphorescent complexes without any inventive activity.
- the compounds according to the invention are also particularly suitable as matrix materials for phosphorescent emitters in organic electroluminescent devices, such as are used, for. as described in WO 98/24271, US 2011/0248247 and US 2012/0223633.
- an additional blue emission layer is vapour-deposited over the entire surface of all pixels, even those with a color different from blue.
- the organic electroluminescent device according to the invention contains no separate hole injection layer and/or hole transport layer and/or hole blocking layer and/or electron transport layer, ie the emitting layer is directly adjacent to the hole injection layer or the anode and/or the emitting layer is directly adjacent to the electron transport layer or the electron injection layer or the cathode, as described for example in WO 2005/053051.
- a metal complex which is the same or similar to the metal complex in the emitting layer directly adjacent to the emitting layer as hole transport or hole injection material, such as. B. described in WO 2009/030981.
- an organic electroluminescence device characterized in that one or more layers are coated using a sublimation process.
- the materials in vacuum sublimation systems become smaller at an initial pressure
- an organic electroluminescent device characterized in that one or more layers with the OVPD (Organic Vapor Phase Deposition) process or using carrier gas sublimation.
- the materials are applied at a pressure between 10 -5 mbar and 1 bar.
- OVPD Organic Vapor Phase Deposition
- carrier gas sublimation carrier gas sublimation
- an organic electroluminescent device characterized in that one or more layers of solution, such as. B. by spin coating, or with any printing method, such as. B. screen printing, flexographic printing, offset printing, LITI (Light Induced Thermal Imaging, thermal transfer printing), ink-jet printing (ink jet printing) or nozzle printing.
- any printing method such as. B. screen printing, flexographic printing, offset printing, LITI (Light Induced Thermal Imaging, thermal transfer printing), ink-jet printing (ink jet printing) or nozzle printing.
- Formulations for applying a compound comprising at least one structure according to formula (I) or its or its preferred embodiments presented above are new.
- a further subject of the present invention is therefore a formulation containing at least one solvent and a compound comprising at least one structure according to formula (I) or the preferred embodiments thereof set out above.
- Hybrid processes are also possible, in which, for example, one or more layers are applied from solution and one or more further layers are vapor-deposited.
- the compounds according to the invention and the organic electroluminescent devices according to the invention are distinguished in particular by an improved service life compared to the prior art.
- the other electronic properties of the electroluminescent devices such as efficiency or operating voltage, remain at least as good.
- the compounds according to the invention and the organic electroluminescent devices according to the invention are distinguished, compared with the prior art, in particular by improved efficiency and/or operating voltage and a longer service life.
- the electronic devices according to the invention, in particular organic electroluminescent devices are distinguished by one or more of the following surprising advantages over the prior art: 1. Electronic devices, in particular organic
- Electroluminescent devices containing compounds comprising at least one structure of the formula (Ia) or the preferred embodiments described above and below as electron-conducting materials and/or matrix materials have excellent efficiency.
- compounds according to the invention comprehensively bring about at least a structure according to formula (I) or the preferred embodiments explained above and below has a low operating voltage when used in electronic devices. 3.
- the compounds of the invention comprising at least one
- optical loss channels can be avoided in electronic devices, in particular organic electroluminescent devices. This is what distinguishes them
- Embodiments form very good films from solutions.
- Electronic devices in particular organic electroluminescent devices containing compounds comprising at least one structure of the formula (Ia) or the preferred embodiments described above and below in combination with host materials of one or more of the formulas (H-1) to (H-5), especially as a matrix material, have an improved service life and higher efficiency.
- the compounds comprising at least one structure according to
- Formula (I) and the preferred embodiments described above and below have a low triplet level T 1 which can be in the range from -2.22 eV to -2.9 eV, for example.
- the reaction mixture is heated under reflux for 14 h. After cooling, the organic phase is separated off, filtered through silica gel and then evaporated to dryness.
- the yield is 53 g (109 mmol), corresponding to 70% of theory.
- reaction mixture is stirred at reflux for 24 hours. After cooling, the organic phase is separated, washed three times with 200 ml of water, dried over MgSO 4 , filtered and the solvent removed in vacuo. The residue is purified by column chromatography on silica gel (mobile phase: DCM/heptane (1:3)). The residue is extracted hot with toluene and recrystallized from toluene/n-heptane and finally sublimed under high vacuum.
- the yield is 48.8 g (88 mmol), corresponding to 55% of theory.
- Pretreatment for Examples E1-E28 Glass flakes coated with structured ITO (indium tin oxide) with a thickness of 50 nm are treated with an oxygen plasma, followed by an argon plasma, before the coating. These plasma-treated glass flakes form the substrates on which the OLEDs are applied.
- structured ITO indium tin oxide
- the OLEDs have the following layer structure: substrate/optional interlayer (IL)/hole injection layer (HIL)/hole transport layer (HTL)/electron blocking layer (EBL)/emission layer (EML)/optional Hole Blocking Layer (HBL) / Electron Transport Layer (ETL) / Optional Electron Injection Layer (EIL) and finally a cathode.
- the cathode is formed by a 100 nm thick aluminum layer.
- Table 1 The precise structure of the OLEDs can be found in Table 1.
- the materials required to produce the OLEDs are shown in Table 2.
- the data of the OLEDs are listed in Tables 3 and 4.
- the emission layer always consists of at least one matrix material (host material, host material) and an emitting dopant (dopant, emitter), which is added to the matrix material or matrix materials by co-evaporation in a certain proportion by volume.
- a specification such as EG1:IC2:TER5 (55%:35%:10%) means that the material EG1 accounts for 55% by volume, IC2 for 35% and TER5 for 10% in the layer present.
- the electron transport layer can also consist of a mixture of two materials.
- the OLEDs are characterized by default.
- the electroluminescence spectra, the current efficiency (SE, measured in cd/A) and the external quantum efficiency (EQE, measured in %) as a function of the luminance, calculated from current-voltage-luminance curves assuming a Lambertian radiation characteristic, and the lifetime are determined .
- the electroluminescence spectra are determined at a luminance of 1000 cd/m 2 and the CIE 1931 x and y color coordinates are calculated therefrom.
- the specification U1000 designates the voltage required for a luminance of 1000 cd/m 2 .
- SE1000 and EQE 1000 denote the current efficiency and external quantum efficiency, respectively, achieved at 1000cd/m 2 .
- the service life LD is defined as the time after which the luminance drops from the initial luminance to a certain proportion L1 when operated with a constant current density jo.
- Comparative compounds EG16 and EG17 compared, in otherwise same OLED stacks.
- the comparison shows that the compounds according to the invention, i.e. the compounds without the enlarged ring system on the side mentioned, have significantly better performance data (comparison of E18 containing EG15 with V1 containing EG16 and comparison of E17 containing EG14 with V2 containing EG17).
- Table 1 Structure of the electroluminescent devices
- Table 2 Structural formulas of the materials for the electroluminescent devices
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- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
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CN202280017954.6A CN116964054A (zh) | 2021-03-02 | 2022-02-28 | 用于有机电致发光器件的化合物 |
EP22706060.5A EP4301757A1 (de) | 2021-03-02 | 2022-02-28 | Verbindungen für organische elektrolumineszenzvorrichtungen |
US18/279,891 US20240188429A1 (en) | 2021-03-02 | 2022-02-28 | Compounds for organic electroluminescent devices |
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