WO2001072673A1 - Derive d'anthracene et dispositifs electroluminescents organiques fabriques avec ceux-ci - Google Patents
Derive d'anthracene et dispositifs electroluminescents organiques fabriques avec ceux-ci Download PDFInfo
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- WO2001072673A1 WO2001072673A1 PCT/JP2001/002330 JP0102330W WO0172673A1 WO 2001072673 A1 WO2001072673 A1 WO 2001072673A1 JP 0102330 W JP0102330 W JP 0102330W WO 0172673 A1 WO0172673 A1 WO 0172673A1
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- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 6
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C15/00—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts
- C07C15/20—Polycyclic condensed hydrocarbons
- C07C15/27—Polycyclic condensed hydrocarbons containing three rings
- C07C15/28—Anthracenes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C15/00—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts
- C07C15/40—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts substituted by unsaturated carbon radicals
- C07C15/50—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts substituted by unsaturated carbon radicals polycyclic non-condensed
- C07C15/52—Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts substituted by unsaturated carbon radicals polycyclic non-condensed containing a group with formula
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Definitions
- the present invention relates to a novel organic compound and organic electroluminescence using the same.
- the present invention relates to an anthracene derivative which is useful as a constituent material of an organic EL device, and an organic EL device having excellent luminous efficiency and heat resistance using the derivative.
- Organic EL devices using electroluminescence have the characteristics of high visibility because they are self-luminous, and have excellent impact resistance because they are completely solid devices. Therefore, it is used in fields such as thin film display elements, backlights for liquid crystal displays, and flat light sources.
- the electroluminescent element that is in practical use is a dispersion-type EL element, but since this dispersion-type EL element requires an AC voltage of several tens of ports and more than 10 kilohertz, it is driven The circuit is complicated.
- organic EL elements capable of reducing the driving voltage to about 10 volts and emitting light with high luminance have been actively studied in recent years.
- a stacked structure of a transparent electrode / hole injection layer / light-emitting layer Z back electrode has been proposed (Appl. Phys. Lett., Vol. 51, Vol. On page 15 (19987) and JP-A-63-264692), these holes are efficiently injected into the light emitting layer by the hole injection layer used here. It is made so that it can be injected.
- the light-emitting layer used in such an organic EL device may be a single layer, but a single layer has a difference in electron transport property and hole transport property. Because of the poor performance, performance was improved by laminating in multiple layers.
- a condensed polycyclic aromatic hydrocarbon compound has been proposed as a light emitting material for an organic EL device (Japanese Patent Application Laid-Open Nos. H11-178488, 6-222845, and 6- 2 2 8 5 4 5 gazette, 6- 2 2 8 5 4 6 gazette, 6- 2 2 8 5 4 7 gazette, 6- 2 2 8 5 4 8 gazette, 6 Nos. 2 285 549, 8-311 442, 8-12600, 8-12 969 and 10-72 579 publication).
- An object of the present invention is to provide a novel compound capable of exhibiting high luminous efficiency and excellent heat resistance when used as a constituent material of an organic EL element in such a situation, and an organic EL element using the same. It is intended for.
- the present inventors have conducted intensive studies to achieve the above object, and as a result, have found that the object can be achieved by an anthracene derivative having a specific structure. Is completed.
- X and ⁇ each independently represent a substituted or unsubstituted trivalent aromatic ring group having 6 to 30 carbon atoms or a substituted or unsubstituted trivalent heterocyclic group having 4 to 30 carbon atoms.
- a 1 to A 4 each independently represent (.1) a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted monovalent heterocyclic group having 4 to 30 carbon atoms, Or (2) A 1 is a hydrogen atom, A 2 is a styryl group in which the phenyl moiety may be substituted, and a-position or ⁇ -position may be substituted with an alkyl group having 1 to 30 carbon atoms, and ⁇ 3 is water atom, alpha 4 may be substituted is Fuweniru sites, alpha-position or) 3-position is a good styryl group which may be substituted with an alkyl group having 1 to 3 0 carbon atoms, R 1 to R 16 Are each independently a hydrogen atom, a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted
- a 1 to A 4 each independently represent (1) a substituted or unsubstituted aryl group having 6 to 30 carbon atoms or a substituted or unsubstituted monovalent monovalent group having 4 to 30 carbon atoms;
- a ′ is a hydrogen atom
- a 2 is a phenyl moiety which may be substituted, or a position at the 3-position or a position at which the 3-position is substituted with an alkyl group having 1 to 30 carbon atoms.
- A3 is a good styryl group
- a 3 is a hydrogen atom
- a 4 is a styryl group which may be substituted at the fuunyl moiety and may be substituted at the ⁇ -position or the 3-position with an alkyl group having 1 to 30 carbon atoms
- R ′ To R ′ 6 each independently represent a hydrogen atom, a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted Substituted alkylthio group, substituted or unsubstituted arylthio group, Or Ariru group unsubstituted Amino groups also substituted or Mu ⁇ conversion (R 1 to R 16 may form a ring with adjacent groups.), Q is a substituted or unsub
- a ′ to A 4 each independently represent (1) a substituted or unsubstituted aryl group having 6 to 30 carbon atoms or a substituted or unsubstituted monovalent heterocyclic ring having 4 to 30 carbon atoms;
- a group or or (2) A 1 is a hydrogen atom
- a 2 is a styryl group which may be substituted at the a- position or at the position which may be substituted with an alkyl group having 1 to 3 ° carbon atoms
- 3 is a hydrogen atom
- a 4 is a styryl group which may be substituted at the ⁇ -position or a 3-position which may be substituted with an alkyl group having 1 to 30 carbon atoms
- R 1 to R 16 each independently represent a hydrogen atom, a halogen atom, Shiano group, a nitro group, a substituted young properly unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substitute
- X and Y are each independently a substituted or unsubstituted trivalent aromatic ring group having 6 to 30 carbon atoms, or a substituted or unsubstituted trivalent heterocyclic group having 4 to 30 carbon atoms.
- Groups, R ′ to R 2 ° each independently represent a hydrogen atom, a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, Or an unsubstituted aryloxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted amino group, or a substituted or unsubstituted aryl group (R 1 to R 2 ° may be bonded to adjacent groups to form a ring.)
- Q are a substituted or unsubstituted
- An organic electroluminescent element comprising the antracene derivative according to any one of [1] to [4] in an emission band.
- An organic electroluminescence device comprising the organic light-emitting layer containing the anthracene derivative according to any one of [.1] to [4].
- the organic compound of the present invention has the general formula (I)
- I is a compound having a structure represented by In the general formula (I), X and Y are each independently a substituted or unsubstituted trivalent aromatic ring group having 6 to 30 carbon atoms, or a substituted or unsubstituted trivalent aromatic ring group having 4 to 30 carbon atoms. Represents a trivalent heterocyclic group.
- examples of the trivalent group composed of an aromatic ring having 6 to 30 carbon atoms include benzene, naphthalene, biphenyl, terphenyl, triphenyl, chrysene, naphthene, picene, perylene, penyrene.
- Anthracene, benzo [a] pyrene, tetraphenylene, bisanthracene, and other aromatic compounds with three hydrogen atoms removed from the aromatic compounds such as sen, coronene, norecene, and benzo [a] pyrene.
- trivalent heterocyclic groups having 4 to 30 carbon atoms include, for example, furan, thiophene, pyrrole, 2-hydroxypyrrolyl, benzofuran, isobenzofuran, 1-benzothiophene, 2-benzothiophene, Indole, isoindole, indoleidine, sorbazolone, 2-hydroxypyran, 2-hydroxycyclomen, 1-hydroxy-2-benzopyran, xanthene, 4-hydroxythiopyran, pyridin, quinoline, isoquinoline, 4-Hydroxyquinolidine, phananthridine, acridine, oxazole, isoxazole, thiazol, isothiazol, furazane, imidazole, pyrazole, benzimidazole, 1-hydroxyimidazole, 1,8-naphthyridine, pyrazine , Pyrimidine, pyridazine, Noxalin, quin
- a 1 to A 4 in the general formula (I) are each independently represented by (1) a substituted or unsubstituted aryl group having 6 to 30 carbon atoms or a substituted or unsubstituted carbon atom having 4 to 3 carbon atoms.
- 0 represents a monovalent heterocyclic group.
- examples of the aryl group having 6 to 30 carbon atoms include phenyl group, naphthyl group, biphenyl group, anthranyl group, evening phenyl group, styryl group and the like.
- Examples of the monovalent heterocyclic group include a monovalent residue corresponding to the trivalent heterocyclic group exemplified in the description of X and ⁇ .
- This styryl group may have a substituent at the phenyl position, and the ⁇ -position or the iS position may be substituted with an alkyl group having 1 to 30 carbon atoms.
- the substituents may be connected to each other to form a cyclic structure.
- Specific examples include phenylvinylene, triphenylvinylene, naphthylvinylene, biphenylvinylene, yuichiphenylvinylene, anthranylvinylene and the like.
- R ′ to R ′ 6 each independently represent a hydrogen atom, a halogen atom, a cyano group, a nitro group, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, Unsubstituted alkoxy group having 1 to 6 carbon atoms, substituted or unsubstituted aryloxy group having 5 to 18 carbon atoms, substituted or unsubstituted aralkyloxy group having 7 to 18 carbon atoms, substituted or unsubstituted carbon number
- Examples of the alkyl group having 1 to 6 carbon atoms include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, various pentyl groups, and various hexyl groups. And the like, and the number of carbon atoms is 1 to Examples of the alkoxy group 6 include methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, tert-butoxy, various pentyloxy groups, various hexyloxy groups, etc. Is mentioned.
- Examples of the aryloxy group having 5 to 18 carbon atoms include phenoxy group, trioxy group, and naphthyloxy group.
- Examples of the aralkyloxy group having 7 to 18 carbon atoms include benzyloxy group, phenethyloxy group, and naphthylmethoxy group.
- Examples of the group include an alkylthio group having 1 to 20 carbon atoms or an arylthio group having 6 to 18 carbon atoms, such as a methylthio group, an ethylthio group, a phenylthio group, and a tolylthio group.
- Examples of the amino group substituted with an aryl group having 5 to 16 include diphenylamino group, dinaphthylamino group, and naphthylphenylamino group.
- Examples of the ester group having 1 to 6 carbon atoms include methoxycarbonyl.
- Groups, ethoxyquincarbonyl, propoxycarbonyl, isopropoxycarbonyl, etc. are examples of halogen atoms Examples include a fluorine atom, a chlorine atom, and a bromine atom.
- Q represents a substituted or unsubstituted cycloalkylene group having 5 to 30 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, or a carbon number And represents a divalent heterocyclic group of 4 to 30.
- the cycloalkylene group having 5 to 30 carbon atoms for example, a cyclopentylene group, a cyclohexylene group, a cycloheptylene group and the like can be mentioned.
- arylene group having 6 to 30 carbon atoms Are, for example, a phenylene group, a naphthylene group, a biphenylene group, an anthranylene group, a terphenylene group, etc.
- divalent heterocyclic group having 4 to 30 carbon atoms include the above-mentioned X, In the description of Y, a divalent residue corresponding to the trivalent heterocyclic group exemplified above can be given.
- P in the general formula (I) is 0, 1 or 2. When P is 0, it represents a single bond.
- the substituent The above R ' ⁇ ; can be exemplified the same groups as R 16.
- the anthracene derivative represented by the general formula (I) which may be bonded to adjacent groups to form a ring is a compound having the above structure.
- those having a glass transition temperature of 100 ° C or higher are preferable, and those having a glass transition temperature of 120 ° C or higher are particularly preferable.
- anthracene derivative represented by the above general formula (I) includes anthracene derivatives represented by the following general formulas (11) and ( ⁇ ′).
- anthracene derivative represented by the general formula (I) includes an anthracene derivative represented by the following general formula (111).
- R ′ to R 2 In this case, R ′ to R 2 . And the adjacent groups of R ′ to R ′ 6 may be bonded to each other to form a ring.
- the general formula (I) Examples of the anthracene derivative represented by (11), ( ⁇ ′) and (111) include compounds represented by the following formulas (1) to (44).
- the method for producing the anthracene derivative represented by the general formula ( 1) of the present invention is not particularly limited, and various methods can be used. For example, it is necessary to efficiently produce a desired anthracene derivative by the method shown below. Can be.
- the anthracene derivative represented by the general formula (I) can be obtained.
- the organic EL element of the present invention is an element having at least an organic light emitting layer sandwiched between a pair of electrodes.
- the typical device configuration of this organic EL device is (1) anode / light-emitting layer / cathode 2Anode / Hole injection layer / Emitting layer / Cathode
- the anthracene derivative represented by the general formula (I), (11), (11 ′) or (no) is a light-emitting layer, a hole transport layer, an electron injection layer, or a positive electrode in these constituent elements.
- a light emitting band such as a hole injection layer (each layer except for both electrodes), particularly one contained in the light emitting layer, is suitably used.
- This organic EL device is usually fabricated on a translucent substrate.
- This light-transmitting substrate is a substrate that supports the organic EL element.
- the light-transmitting substrate preferably has a light transmittance of at least 50% in a visible region of 400 to 70 O nm. It is preferable to use a smoother substrate.
- a translucent substrate for example, a glass plate, a synthetic resin plate or the like is suitably used.
- the glass plate include a plate formed of soda lime glass, norm's strontium-containing glass, lead glass, aluminogate glass, borate glass, lithium borate glass, and quartz.
- the synthetic resin plate include plates of polycarbonate resin, acryl resin, polyethylene terephthalate resin, polyether sulfide resin, and polysulfone resin.
- anode those having a metal, an alloy, an electrically conductive compound or a mixture thereof having a large work function (4 eV or more) as an electrode material are preferably used.
- an electrode material include metals such as Au, conductive materials such as Cu ln, I TO (indium tin oxide), Sn 2 , ZnO, and In—Zn-0. No.
- a thin film can be formed from these electrode substances by a method such as a vapor deposition method or a sputtering method.
- the anode desirably has such a characteristic that when the light emitted from the light emitting layer is extracted from the anode, the transmittance of the anode to the emitted light is greater than 10%. Further, it is preferable that the sheet resistance of the anode is several hundreds ⁇ or less. Furthermore, the thickness of the anode depends on the material, but is usually 10 ⁇ ! 11 m, preferably in the range of 10-200 nm.
- a metal, an alloy, an electrically conductive compound, or a mixture thereof having a low work function (4 eV or less) as an electrode material is used as the cathode.
- an electrode material sodium, sodium mono-potassium alloy, Maguneshiu arm, lithium, magnesium 'silver alloy, aluminum / aluminum oxide, A 1 / L i 2 0 , A 1 / L i 0 2, A1 / LiF, aluminum 'Lithium alloy, indium, rare earth metal, etc.
- This cathode can be manufactured by forming a thin film from these electrode substances by a method such as vapor deposition or sputtering.
- the transmittance of the cathode with respect to the emitted light be greater than 10%.
- the sheet resistance as the cathode is preferably several hundreds ⁇ square or less, and the film thickness is usually 10 nm to 1 xm, preferably 50 to 200 nm.
- a carbogenide layer, a metal halide layer, or a metal oxide layer on at least one surface of the pair of electrodes manufactured as described above.
- a metal carbokene (including oxide) layer such as gay or aluminum is provided on the anode surface on the light emitting medium layer side
- a metal halide layer or metal oxide layer is provided on the cathode surface on the light emitting medium layer side. It is good to arrange a physical layer. Thereby, the drive can be stabilized.
- Preferred examples of the cargokenide include S i Ox (1 ⁇ x ⁇ 2), AI0X (1 ⁇ x ⁇ 1.52), S i ⁇ N, S i A 1 ⁇ N, and the like.
- the halogenation metals for example, C s F, L i F , Mg F 2, C aF 2, fluorinated rare earth metal is preferably exemplified as the metal oxide, for example, C s 2 0, L Preferred are i 2 M, M g 0, S r 0, B aO, and C a ⁇ .
- the light emitting layer of the organic EL device of the present invention a layer having the following functions is preferable.
- 1Injection function Function to inject holes from anode or hole injection layer when applying electric field, and to inject electrons from cathode or electron injection layer
- Light-emitting function Provides a field for recombination of electrons and holes, and connects it to light emission.
- ease of hole injection may be large or small, it is preferable to transfer either one of the charges.
- the anthracene derivative represented by the general formula (I), (11), or ( ⁇ ) satisfies the above three conditions, and can form a light emitting layer mainly composed of the three.
- a recombination site forming substance can be used as a part of the constituent material of the light emitting layer of the organic EL element.
- This recombination site-forming substance is a substance that positively provides a place where electrons and holes injected from both poles are recombined with each other, or recombination energy of electrons and holes is not generated but recombination energy is propagated. It is a substance that provides a place to emit light.
- the electrons and holes are more intensively recombined in the vicinity of the center of the light emitting layer than in the case where the anthracene derivative is used alone, so that the light emitting layer has The emission luminance can be further increased.
- the recombination site-forming substance used as a constituent material of the light emitting layer of the organic EL device of the present invention has a high fluorescence quantum yield. Is preferably from 0.3 to 0.
- Such a recombination site-forming substance may be one or two selected from styrylamine-based compounds, quinatalidone-induced derivatives, rubrene derivatives, coumarin derivatives, perylene derivatives, silane derivatives, and fluoranthene derivatives. A mixture of the above is mentioned.
- a conjugated polymer compound can be used as the recombination site-forming substance, particularly a polyarylenevinylene derivative or an alkyl- or alkoxy-substituted polyarylenevinylene having 1 to 50 carbon atoms. Derivatives and the like.
- recombination site-forming substances in consideration of the coloring property of the light emitting layer.
- a blue color it is preferable to use perylene, a styrylamine derivative, or an amino-substituted distyrarylamine derivative.
- a green color it is preferable to use a quinatalidone derivative or a coumarin derivative.
- a rubrene derivative or the like it is preferable to use a dicyanomethylbiran derivative or the like.
- anthracene derivative represented by the general formula (I), (11), (11 ′) or (Hi) of the present invention is also a preferable embodiment to use the anthracene derivative represented by the general formula (I), (11), (11 ′) or (Hi) of the present invention as a recombination site-forming substance. .
- the mixing ratio of the recombination site-forming substance is determined in consideration of the light emission luminance and the coloring property of the light emitting layer. Specifically, the organic compound 100 mass It is preferable that the value be in the range of 0.1 to 20 parts by mass with respect to parts. If the amount of the recombination site-forming substance is less than 0.1 part by mass, the emission luminance tends to decrease, while if it exceeds 20 parts by mass, the heat resistance tends to decrease. Therefore, in order to further maintain the balance between the emission luminance and the heat resistance in the organic EL element, the mixing ratio is set to 0.5 to 20 parts by mass with respect to 100 parts by mass of the organic compound. It is more preferable that this value be 1. The content is preferably 0 to 10 parts by mass.
- the following compounds are used depending on the desired color tone in addition to the above.
- a compound represented by the general formula (IV) is preferably used.
- Y represents a divalent group represented by Represents an aryl group represented by
- the phenyl group, phenylene group and naphthyl group in the compound represented by the general formula (IV) include an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a hydroxyl group, a sulfonyl group, a carbonyl group, One or more substituents such as an amino group, a dimethylamino group or a diphenylamino group may be introduced. When a plurality of these substituents are present, they may be bonded to each other to form a saturated 5- or 6-membered ring.
- this compound is preferably a compound which is bonded to a phenyl group, a diene group or a naphthyl group at the para position, since it has good binding properties and a smooth vapor-deposited film is easily formed.
- Specific examples of the compound represented by the above general formula (IV) are as follows.
- Me is a methyl group
- t—Bu is a tertiary butyl group
- Ph is
- a p-quarterphenyl derivative and a p-quinphenyl derivative are particularly preferred.
- fluorescent brighteners such as benzothiazole, benzoimidazole, and benzoxazole compounds, metal chelated oxinoid compounds, and styrylbenzene compounds must be used.
- fluorescent brighteners such as benzothiazole, benzoimidazole, and benzoxazole compounds, metal chelated oxinoid compounds, and styrylbenzene compounds must be used.
- Specific examples of these compounds include, for example, compounds disclosed in Japanese Patent Application Laid-Open No. 59-194393. Still other useful compounds are listed in Chemistry of Synthetic Soybean (1971) pp. 62-8-637 and 640.
- the chelated oxinoxide compound for example, the compounds disclosed in JP-A-63-295695 can be used.
- a typical example is Examples of suitable compounds include 8-hydroxyquinoline-based metal complexes such as tris (8-quinolinol) aluminum and dilithium epinetridione.
- styrylbenzene-based compound for example, those disclosed in European Patent 0 319 881 and European Patent 0 373 582 can be used.
- a distyryl virazine derivative disclosed in Japanese Patent Application Laid-Open No. 2-252793 can also be used as a material for the light emitting layer.
- the polyphenylene-based compound disclosed in European Patent No. 0 387 715 can also be used as a material for the light emitting layer.
- fluorescent whitening agents metal-chelated oxoxide compounds, and styrene-benzene compounds
- 12-phthal-perinone J. Appl. Phys .. Vol. 27) , L 7 13 (1989)
- 1,4-diphenyl-1,3-butadiene 1,4,4-tetrafluoroethylene 3-butadiene
- naphthalimide derivatives Japanese Patent Application Laid-Open No. Hei 2-308886
- perylene derivatives Japanese Patent Application Laid-Open No.
- an aromatic dimethylidin compound European Patent It is preferable to use the specification of Japanese Patent No. 03887768 (disclosed in Japanese Patent Application Laid-Open No. 3-231970).
- Specific examples include 4,4'-bis (2,2-dibutylvinylvinyl) biphenyl, 4,4'-bis (2,2-diphenylvinyl) biphenyl, and derivatives thereof. Can be mentioned.
- examples of the host include the above-described light-emitting materials
- examples of the dopant include strong fluorescent dyes ranging from blue to green, for example, a coumarin-based fluorescent dye or a fluorescent dye similar to that used as the host.
- a luminescent material having a distyrylarylene skeleton as a host particularly preferably 4,4′-bis (2,2-diphenylvinyl) biphenyl, and a berylene derivative as a dopant, particularly Preferably, for example, a distyrylarylene derivative can be mentioned.
- the light emitting layer that emits white light is not particularly limited, but the following can be used.
- a light-emitting layer which is divided into a plurality of light-emitting layers and is made of a material having a different light-emitting wavelength (Japanese Patent Laid-Open No. 4-51491).
- ⁇ ⁇ ⁇ A structure in which a blue light emitter (fluorescence peak 380 to 480 nm) and a green light emitter (480 to 580 nm) are laminated, and further containing a red phosphor (Japanese Patent Laid-Open No. 6-207171). No.).
- the blue light-emitting layer contains a blue fluorescent dye
- the green light-emitting layer has a region containing a red fluorescent dye, and further contains a green phosphor (Japanese Unexamined Patent Publication No. 7-14216) No. 9).
- the above-mentioned configuration is particularly preferable.
- red phosphor those shown below are preferably used.
- Me represents a methyl group
- i Pr represents an isopropyl group
- Et represents an ethyl group
- the light emitting layer is particularly preferably a molecular deposition film.
- the molecular deposition film is a thin film formed by depositing a material compound in a gaseous state or a film formed by solidifying a material compound in a solution state or a liquid phase state. Deposited films can be distinguished from thin films (accumulated molecular films) formed by the LB method by differences in the cohesive structure, higher-order structure, and the resulting functional differences.
- the solution is spin-coated or the like.
- the light emitting layer can also be formed by thinning.
- This light-emitting layer may be composed of one or more of the above-mentioned materials, or may be a laminate of light-emitting layers made of a compound different from the light-emitting layer.
- the hole injection / transport layer is a layer that assists hole injection into the light emitting layer and transports it to the light emitting region.
- the hole mobility is large, and the ionization energy is usually 5.5 eV or less. small.
- Electric field application of the hole injection 'material which transports holes to the light emitting layer is preferably at a lower electric field intensity.
- Transporting layer further hole mobility of, for example, 1 0 4 ⁇ 1 0 6 V / cm sometimes, those at least 1 0- 6 cm 2 ZV ⁇ sec is preferred.
- the material for forming the hole injecting / transporting layer by mixing with the distyryl arylene derivative of the present invention is not particularly limited as long as it has the above-mentioned preferable properties. Any material can be selected from those commonly used as a transport material and known materials used for a hole injection layer of an organic EL device.
- Examples of the material for forming such a hole injection / transport layer include, for example, a triazole derivative (see US Pat. No. 3,112,197) and an oxaziazole derivative (US Pat. 3, 189, 447, etc.), imidazole derivatives (see Japanese Patent Publication No. 37-19696, etc.), polyarylalkane derivatives (US Pat. No. 3,615,40) No. 2, No. 3, 820, 989 No. 3, No. 3,
- JP-A-2-204996 polysilanes
- aniline-based copolymers JP-A-2-282263
- JP-A-1-1221939 No. PCT / JP01 / 02330 WO 01/72673
- the conductive polymer oligomers (particularly, thiophene oligomers) shown can be exemplified.
- the above-mentioned materials can be used, but porphyrin compounds (those disclosed in JP-A-63-2956565) and aromatic materials Group tertiary amine compounds and styrylamine compounds (U.S. Pat. Nos. 4,127,412; JP-A-53-27033; JP-A-54-584345) Gazette, ibid. 5
- JP-A-55-558, JP-A-6I-98353, JP-A-63-295569, etc.), and aromatic tertiary amine compounds can also be used. .
- an inorganic compound such as iC can also be used as a material for the hole injection / transport layer.
- the above compound may be thinned by a known method such as a vacuum evaporation method, a spin coating method, a casting method, and an LB method.
- the thickness of the hole injection / transport layer is not particularly limited, but is usually 5 nir! ⁇ 5.
- the hole injection / transport layer may be composed of one or more of the above-mentioned materials as long as the hole transport zone contains the aromatic hydrocarbon compound of the present invention. Further, a layer obtained by laminating a hole injecting / transporting layer made of a different kind of compound from the above-mentioned positively entering / transporting layer may be used.
- the organic semiconductor layer is a layer that assists hole injection or electron injection into the light emitting layer.
- those having a conductivity of 10- '° S / cm or more are preferable.
- the material for such an organic semiconductor layer include thiophenin-containing oligomers, such as conductive oligomers such as arylamine-containing oligomers described in Japanese Patent Application Laid-Open No. 8-193191, and aryl-containing oligomers.
- a conductive dendrimer such as a mindendrimer can be used.
- the electron injection layer is a layer that assists the injection of electrons into the light emitting layer, has a high electron mobility
- the adhesion improving layer is a material that has particularly good adhesion to the cathode in the electron injection layer. It is a layer consisting of
- a metal complex of 8-hydroxyquinoline or a derivative thereof is preferable.
- Specific examples of the metal complex of 8-hydroxyquinoline or a derivative thereof include a metal chelate oxoxide compound containing a chelate of oxine (generally 8-quinolinol or 8-hydroxyquinoline), for example, tris (8-quinolinol) Aluminum can be used as an electron injection material.
- Ar ′, Ar 2 , Ar 3 , Ar 5 , Ar 6 and Ar 9 each represent an aryl group having or not having a substituent
- Ar ′, Ar 2 , Ar 3 and Ar 5 , and Ar 6 and Ar 9 may be the same or different from each other
- Ar 4 , Ar 7 and Ar 8 each represent an arylene group with or without a substituent.
- Ar 7 and Ar 8 may be the same or different.
- the electron transfer compound represented by these is mentioned.
- Examples of the aryl group in the general formulas (V) to ( ⁇ ) include a phenyl group, a biphenyl group, an anthranyl group, a perylenyl group, and a pyrenyl group.
- the arylene group includes a phenylene group, a naphthylene group, a biphenylene group, an anthranylene group, a perylene group, a pyrenylene group, and the like.
- Examples of the substituent include an alkyl group having 1 to 10 carbon atoms, an alkoxy group or a cyano group having 1 to 10 carbon atoms, and the like.
- As the electron transfer compound those having good thin film forming properties are preferably used.
- Me represents a methyl group
- t—Bu represents a tert-butyl group
- an anode, a light-emitting layer, a hole injection layer as needed, and an electron injection layer as needed are formed by the above materials and methods.
- a cathode may be formed.
- an organic EL device can be manufactured in the reverse order from the cathode to the anode.
- an anode hole injection layer / a light emitting layer, a Z electron injection layer, and a Z cathode are sequentially formed on a translucent substrate.
- a thin film made of an anode material is formed on a suitable translucent substrate by a vapor deposition method or a sputtering method so as to have a thickness of 1 m or less, preferably in a range of 10 to 200 nm.
- a hole injection layer is provided on the anode.
- the hole injection layer can be formed by a method such as vacuum deposition, spin coating, casting, or LB, which makes it easy to obtain a uniform film and has a pinhole. It is preferable to form by a vacuum evaporation method from the viewpoint that it hardly occurs.
- the deposition conditions vary depending on the compound used (the material of the hole injection layer), the crystal structure and the recombination structure of the target hole injection layer, and the like.
- a light emitting layer is provided on the hole injection layer.
- This light-emitting layer can also be formed by thinning the organic light-emitting material using a desired organic light-emitting material by a method such as a vacuum evaporation method, a sputtering method, a spin-coat method, or a casting method. It is preferable to form by a vacuum evaporation method from the viewpoints that it is easy to obtain and that pinholes are hardly generated.
- the deposition conditions vary depending on the compound used, but can be generally selected from the same condition ranges as those for forming the hole injection layer.
- an electron injection layer is provided on the light emitting layer. Also in this case, like the hole injection layer and the light emitting layer, it is preferable to form the film by a vacuum evaporation method from the viewpoint of obtaining a uniform film.
- the deposition conditions can be selected from the same condition ranges as for the hole injection layer and the light emitting layer.
- the anthracene derivative of the present invention differs depending on which of the above organic compound layers is contained, but when using a vacuum deposition method, it can be co-deposited with another material. When a spin coating method is used, it can be contained by mixing with another material.
- an organic EL element can be obtained by laminating a cathode.
- the cathode is made of metal, and can be formed by vapor deposition or sputtering. However, in order to protect the underlying organic material layer from damage during film formation, a vacuum deposition method is preferable. In the production of the organic EL element described above, it is preferable to produce the anode to the cathode consistently by a single evacuation.
- the anode When a DC voltage is applied to the organic EL device, the anode is set to + and the cathode is set to one polarity, and light emission can be observed when a voltage of 3 to 40 V is applied. Also, even if a voltage is applied in the opposite polarity, no current flows and no light emission occurs. Furthermore, when an AC voltage is applied, uniform light emission is observed only when the anode has a positive polarity and the cathode has a negative polarity. In this case, the waveform of the applied AC may be arbitrary.
- the reaction product was inactivated by adding 50 ml of 50% hypophosphorous acid to the reaction product, and the resulting solid was filtered off and washed with water, methanol and acetone to obtain a white solid 3.8 g (yield 81%) ).
- the elemental analysis values and field desorption mass spectrum (FD-MS) measurement results for this product are as follows.
- reaction mixture was quenched by adding 100 milliliters of water, the organic layer was separated, washed with saturated saline, dried over anhydrous magnesium sulfate, and the solvent was distilled off. Purification with silica gel Z hexane + 10% dichloromethane) yielded 8.0 g (yield 53%) of a white solid.
- the reaction product was inactivated by adding 30 milliliters of 50% hypophosphorous acid to the reaction product, and the resulting solid was filtered off, washed with water, methanol, and acetone to obtain 4.4 g of a white solid (yield 92 %).
- the elemental analysis values and field desorption mass spectrum (FD-MS) measurement results for this product are as follows.
- This TPD232 film functions as a hole injection layer.
- a 20 nm thick 4,4'-bis [N- (1-naphthyl) -1-N-phenyl] biphenyl film (hereinafter abbreviated as "NPD film") is placed on the TPD2332 film. ) was formed.
- NPD film functions as a hole transport layer.
- a compound E 1 was deposited on the NPD film to a thickness of 4 O nm. This film functions as a light emitting layer.
- ⁇ 1q film a 20 nm-thick tris ( ⁇ -quinolinol) aluminum film (hereinafter abbreviated as “ ⁇ 1q film”) was formed on this film.
- This A1q film functions as an electron injection layer.
- Li manufactured by SAES Getter Co.
- Alq binary deposited to form an A1q: Li film as an electron injection layer (negative electrode).
- metal A 1 was vapor-deposited on the A 1 q: Li film to form a metal cathode.
- a 1 q Li film
- the device emitted blue light with a luminance of 150 cd / m 2 , a maximum luminance of 4300 cd / m 2 , and 3.0 cdZA at 6 V.
- the spectrum of this device has a peak wavelength near 45 O nm and excellent color purity of chromaticity coordinates (0.150, 0.131).
- a device was produced in the same manner as in Example 5, except that the light emitting layer was formed using Compound E4 instead of Compound E1.
- the luminescence characteristics were confirmed and heat resistance experiments were performed. Table 1 shows the results.
- the method of the heat resistance experiment is as follows.
- the brightness of the fabricated device was measured at room temperature, and this was taken as the initial brightness (1.).
- the device was stored in a thermostat at 85 ° C. for 500 hours.
- the element was taken out a thermostat or al, was allowed to come to room temperature, and measuring the 5 0 0 hours elapsed after the luminance (1 5 0.), Brightness reduction rate (%) calculated from the following equation, heat The sex was evaluated.
- Luminance reduction rate (Q / o) (I. — I 5. ) X 100
- a device was produced in the same manner as in Example 5, except that the light emitting layer was formed using compound E7 instead of compound E1.
- the luminescence characteristics were confirmed and heat resistance experiments were performed. Table 1 shows the results.
- a device was produced in the same manner as in Example 5, except that the light emitting layer was formed using compound E9 instead of compound E1.
- the luminescence characteristics were confirmed and heat resistance experiments were performed. Table 1 shows the results.
- a device was produced in the same manner as in Example 5, except that the light emitting layer was formed using Compound E13 instead of Compound E1.
- the light emission characteristics were confirmed and heat resistance experiments were performed. Table 1 shows the results.
- a device was produced in the same manner as in Example 5, except that the light emitting layer was formed using compound E14 instead of compound E1. For this device, the light emission characteristics were confirmed and heat resistance experiments were performed. Table 1 shows the results.
- a device was produced in the same manner as in Example 5, except that the light-emitting layer was formed using Compound E17 instead of Compound E1.
- the luminescence characteristics were confirmed and heat resistance experiments were performed. Table 1 shows the results.
- Example 1 2 (Production of organic EL element) A device was produced in the same manner as in Example 5, except that the light emitting layer was formed using compound E31 instead of compound E1. For this device, the luminescence characteristics were confirmed and heat resistance experiments were performed. Table 1 shows the results.
- a device was produced in the same manner as in Example 5, except that the light-emitting layer was formed using the anthracene-based compound H1 having the following structural formula instead of the compound E1. With respect to this device, the light emission characteristics were confirmed and a heat resistance experiment was performed. Table 1 shows the results.
- Compound 32 was synthesized as follows.
- Compound 33 was synthesized as follows.
- Compound 35 was synthesized as follows.
- Example i 6 to 18 production of organic EL device
- a device was produced in the same manner as in Example 5, except that the light-emitting layer was formed using the compounds shown in Table 1 below instead of the compound E1.
- the emission characteristics were confirmed and heat resistance experiments were performed.
- chromaticity coordinates were also measured. The results are shown.
- the glass transition temperatures (T g) of the compounds E1, E32, E33, and E42 were measured by differential scanning calorimetry (DSC). Comparative Example 2 (measurement of glass transition temperature) in which both 140 ° C and 140 ° C were more than 140 ° C.
- the Tg of the compound H1 used in Comparative Example 1 was measured by DSC, and it was 96 ° C., and the heat resistance was low.
- a device was produced in the same manner as in Example 5, except that the light emitting layer was formed using compound E42 instead of compound E1. For this device, the emission characteristics were confirmed and the chromaticity coordinates were measured. Table 1 shows the results. In addition, the maximum light emission luminance was 3000 cd / m 2 .
- a device was produced in the same manner as in Example 5, except that the light emitting layer was formed using Compound E43 instead of Compound E1. For this device, the emission characteristics were confirmed and the chromaticity coordinates were measured. Table 1 shows the results.
- Example 5 A device was produced in the same manner as in Example 5, except that the light emitting layer was formed using compound E44 instead of compound E1. For this device, the emission characteristics were confirmed and the chromaticity coordinates were measured. Table 1 shows the results. Comparative Example 3 (Production of organic EL device)
- a device was produced in the same manner as in Example 5, except that the light emitting layer was formed using the following compound H2 instead of the compound E1. For this device, the emission characteristics were confirmed and the chromaticity coordinates were measured. Table 1 shows the results.
- a device was produced in the same manner as in Example 5, except that the light emitting layer was formed using the following compound H3 instead of compound E1. For this device, the emission characteristics were confirmed and the chromaticity coordinates were measured. Table 1 shows the results.
- Example 5 E 1 6 9 5 * 3.05 (0.150, 0.131)
- Example 6 E 4 6 13 0 Blue 3.5 7 1
- Example 10 E 1 4 6 1 2 0 Blue 3.76 1
- Example 11 E 17 6 6 0 Blue-green 4.0 5
- Example 16 E 3 2 6 2 1 0 Blue 2.2 1 (0.150, 0.135)
- Example 17 E 3 3 6 1 2 0 Blue 4.3 2 (0.171, 0.130)
- Example 18 E 3 5 6 1 7 0 Blue 4. 9 4
- Example 23 E 4 2 6 1 5 7 Blue-violet 3.0 (0.170, 0.130)
- Example 24 E 4 3 6 1 3 0 Blue-violet 2.4 (0.155, 0.103)
- Example 25 E 4 4 6 1 6 1 Blue purple 2, 6 (0.155, 0.112) Comparative example 1 H1 6 1 2 0 1.1.7 4 5 (0.182, 0.288) Comparative example 3 H2 6 3 1 3 Blue 1.6 (0.162, 0.160) Comparative Example 4 H 3 6 1 2 0 Blue-green 2.0 (0.210, 0.320)
- the organic EL device having the light-emitting layer has a high luminous efficiency, a small luminance reduction rate, and a high heat resistance.
- the organic EL device of the present invention can emit blue light with excellent color purity compared to the comparative example.
- the organic EL devices shown in Comparative Examples 1, 3, and 4 not only have low luminous efficiency, but also have a strong green color and are particularly used as blue light-emitting devices in Comparative Examples 1 and 4. Can not do. Industrial applicability
- the anthracene derivative of the present invention is useful as a constituent material of an organic EL device, and particularly when used as a luminescent material, exhibits excellent luminous efficiency and heat resistance (lifetime), and particularly has fluorescence in a blue to green region. Useful as an element.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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AT01915727T ATE451344T1 (de) | 2000-03-29 | 2001-03-23 | Anthracenderivate und organische elektrolumineszente vorrichtung die unter verwendung dieser derivate hergestellt ist |
DE60140720T DE60140720D1 (de) | 2000-03-29 | 2001-03-23 | Anthracenderivate und organische elektrolumineszente vorrichtung die unter verwendung dieser derivate hergestellt ist |
EP01915727A EP1182183B1 (en) | 2000-03-29 | 2001-03-23 | Anthracene derivatives and organic electroluminescent devices made by using the same |
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JP2000/90644 | 2000-03-29 | ||
JP2000090644 | 2000-03-29 | ||
JP2000319297 | 2000-10-19 | ||
JP2000/319297 | 2000-10-19 |
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WO2001072673A1 true WO2001072673A1 (fr) | 2001-10-04 |
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PCT/JP2001/002330 WO2001072673A1 (fr) | 2000-03-29 | 2001-03-23 | Derive d'anthracene et dispositifs electroluminescents organiques fabriques avec ceux-ci |
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US (2) | US20020048687A1 (ja) |
EP (1) | EP1182183B1 (ja) |
KR (1) | KR100843819B1 (ja) |
CN (1) | CN1226250C (ja) |
AT (1) | ATE451344T1 (ja) |
DE (1) | DE60140720D1 (ja) |
TW (1) | TW574342B (ja) |
WO (1) | WO2001072673A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
US20040100188A1 (en) | 2004-05-27 |
CN1226250C (zh) | 2005-11-09 |
DE60140720D1 (de) | 2010-01-21 |
KR20020026864A (ko) | 2002-04-12 |
TW574342B (en) | 2004-02-01 |
CN1365347A (zh) | 2002-08-21 |
EP1182183B1 (en) | 2009-12-09 |
US20020048687A1 (en) | 2002-04-25 |
US6797848B2 (en) | 2004-09-28 |
EP1182183A4 (en) | 2002-06-19 |
EP1182183A1 (en) | 2002-02-27 |
KR100843819B1 (ko) | 2008-07-03 |
ATE451344T1 (de) | 2009-12-15 |
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