WO2014034795A1 - 芳香族アミン誘導体およびこれを用いた有機エレクトロルミネッセンス素子 - Google Patents
芳香族アミン誘導体およびこれを用いた有機エレクトロルミネッセンス素子 Download PDFInfo
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- WO2014034795A1 WO2014034795A1 PCT/JP2013/073187 JP2013073187W WO2014034795A1 WO 2014034795 A1 WO2014034795 A1 WO 2014034795A1 JP 2013073187 W JP2013073187 W JP 2013073187W WO 2014034795 A1 WO2014034795 A1 WO 2014034795A1
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- 0 *C1C=CC23SC4C=CC=CC4C2C3C1 Chemical compound *C1C=CC23SC4C=CC=CC4C2C3C1 0.000 description 1
- XVPQMCDSHPKACU-UHFFFAOYSA-N NC1CC(C2C(C3)CCCC2)=C3CC1 Chemical compound NC1CC(C2C(C3)CCCC2)=C3CC1 XVPQMCDSHPKACU-UHFFFAOYSA-N 0.000 description 1
- ZJZFUXMNUZSPFL-UHFFFAOYSA-N c1ccc(C2(c(cc(cc3)N(c(cc4)ccc4-c(cc4)cc5c4[o]c4c5cccc4)c(cc4)ccc4-c4c5[o]c(cccc6)c6c5ccc4)c3-c3ccccc23)c2ccccc2)cc1 Chemical compound c1ccc(C2(c(cc(cc3)N(c(cc4)ccc4-c(cc4)cc5c4[o]c4c5cccc4)c(cc4)ccc4-c4c5[o]c(cccc6)c6c5ccc4)c3-c3ccccc23)c2ccccc2)cc1 ZJZFUXMNUZSPFL-UHFFFAOYSA-N 0.000 description 1
- ZCGXAVSUHOFGKX-UHFFFAOYSA-N c1ccc(C2(c(cc(cc3)N(c(cc4)ccc4-c(cc4)cc5c4[o]c4ccccc54)c(cc4)ccc4-c(cc4)cc5c4[o]c4c5cccc4)c3-c3ccccc23)c2ccccc2)cc1 Chemical compound c1ccc(C2(c(cc(cc3)N(c(cc4)ccc4-c(cc4)cc5c4[o]c4ccccc54)c(cc4)ccc4-c(cc4)cc5c4[o]c4c5cccc4)c3-c3ccccc23)c2ccccc2)cc1 ZCGXAVSUHOFGKX-UHFFFAOYSA-N 0.000 description 1
- KRVDXAIKEWTASG-UHFFFAOYSA-N c1ccc(C2(c(cc(cc3)N(c(cc4)ccc4-c4cccc5c4[s]c4c5cccc4)c(cc4)ccc4-c4c5[s]c(cccc6)c6c5ccc4)c3-c3ccccc23)c2ccccc2)cc1 Chemical compound c1ccc(C2(c(cc(cc3)N(c(cc4)ccc4-c4cccc5c4[s]c4c5cccc4)c(cc4)ccc4-c4c5[s]c(cccc6)c6c5ccc4)c3-c3ccccc23)c2ccccc2)cc1 KRVDXAIKEWTASG-UHFFFAOYSA-N 0.000 description 1
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- C07C211/57—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton
- C07C211/61—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton with at least one of the condensed ring systems formed by three or more rings
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- C07C217/80—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of non-condensed six-membered aromatic rings
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- C07C217/84—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of non-condensed six-membered aromatic rings of the same non-condensed six-membered aromatic ring the oxygen atom of at least one of the etherified hydroxy groups being further bound to an acyclic carbon atom
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- C07C217/82—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of non-condensed six-membered aromatic rings of the same non-condensed six-membered aromatic ring
- C07C217/92—Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton having amino groups and etherified hydroxy groups bound to carbon atoms of non-condensed six-membered aromatic rings of the same non-condensed six-membered aromatic ring the nitrogen atom of at least one of the amino groups being further bound to a carbon atom of a six-membered aromatic ring
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Definitions
- the present invention relates to an aromatic amine derivative and an organic electroluminescence device using the same.
- the present invention relates to an aromatic amine derivative having a substituted or unsubstituted 9,9-diphenylfluorene skeleton and an organic electroluminescence device using the same.
- an organic electroluminescence (EL) element is composed of an anode, a cathode, and one or more organic thin film layers sandwiched between the anode and the cathode.
- EL organic electroluminescence
- a voltage is applied between both electrodes, electrons from the cathode side and holes from the anode side are injected into the light emitting region, and the injected electrons and holes recombine in the light emitting region to generate an excited state, which is excited.
- Light is emitted when the state returns to the ground state. Therefore, the development of a compound that efficiently transports electrons or holes to the light emitting region and facilitates recombination of electrons and holes is important in obtaining a high-efficiency organic EL device.
- Patent Document 1 discloses an aromatic amine derivative having a structure in which an N-carbazolyl group is directly bonded to a 9,9-diphenylfluorene skeleton
- Patent Document 2 discloses a 3-carbazolyl group.
- Patent Document 4 discloses an aromatic amine derivative having a structure in which a 3-carbazolyl group is bonded to a 9,9-diphenylfluorene skeleton via a nitrogen atom.
- Patent Documents 1 to 4 cannot be said to be sufficiently improved in terms of lowering the driving voltage and extending the life, and further improvements have been demanded.
- Patent Document 5 proposes an aromatic amine derivative having a skeleton selected from a fluorene skeleton, a carbazole skeleton, a dibenzofuran skeleton, and a dibenzothiophene skeleton, and uses the aromatic amine derivative as an organic EL device material, particularly as a hole transport material.
- the described organic EL element can be driven at a low voltage and has a long lifetime.
- Patent Document 5 discloses a compound in which a diarylamino group is bonded to the 2-position of a 9,9-diphenylfluorene skeleton.
- the present invention has been made to solve the above-described problems, and can be driven at a low voltage, has a long life and high efficiency, and a material for an organic EL element that can realize the organic EL element, for example, holes.
- the object is to provide a transport material.
- a compound in which a disubstituted amino group is bonded directly or indirectly to the 2-position of the 9,9-diphenylfluorene skeleton A compound in which at least one group of a di-substituted amino group is bonded to a nitrogen atom directly or via a phenylene group has good hole injecting property and hole transporting property, can be driven at a low voltage, has a long life and high It discovered that an organic EL element of efficiency was implement
- the present invention provides an aromatic amine derivative represented by the following formula (1).
- Ar 1 represents a group selected from the following formulas (2) to (4).
- Ar 2 represents a group selected from the following formulas (6) to (15).
- L represents a single bond or a divalent group represented by the following formula (16), and the aromatic amine derivative of the formula (1) is When having a plurality of L, the plurality of L may be the same as or different from each other.
- R 1 represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted ring carbon number of 6 to 50 Aryl groups, halogen atoms, substituted or unsubstituted fluoroalkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted alkoxy groups having 1 to 20 carbon atoms, substituted or unsubstituted fluoroalkoxy groups having 1 to 20 carbon atoms , or represents a cyano group, if R 1 there are a plurality, R 1 of the plurality of may be the same or different.
- R 2 and R 3 may be the same or different, and each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted ring carbon number of 6 to 50 aryl groups, substituted or unsubstituted heterocyclic groups with 3 to 50 ring atoms, halogen atoms, substituted or unsubstituted fluoroalkyl groups with 1 to 20 carbon atoms, substituted or unsubstituted 1 to 20 carbon atoms An alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted fluoroalkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, or a cyano group, and a plurality of R 2 are present , R 2 of the plurality of may be the same or different, if R 3 there are
- two R 4 s may be the same or different and each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted ring.
- Aryl group having 6 to 50 carbon atoms, substituted or unsubstituted heterocyclic group having 3 to 50 ring atoms, halogen atom, substituted or unsubstituted fluoroalkyl group having 1 to 20 carbon atoms, substituted or unsubstituted carbon number Represents an alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted fluoroalkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 50 ring carbon atoms, or a cyano group;
- R 2 , R 3 and R 4 may be the same or different.
- k is an integer of 1 to 5.
- m is an integer of 1 to 4.
- n is an integer of 1 to 3.
- the present invention is an organic electroluminescence device comprising an anode, a cathode, and one or more organic thin film layers between the anode and the cathode, wherein the one or more organic thin film layers include a light emitting layer,
- an organic electroluminescence device characterized in that at least one organic thin film layer contains an aromatic amine derivative represented by the above formula (1).
- carbon number ab in the expression “substituted or unsubstituted X group having carbon number ab” represents the carbon number when X group is unsubstituted, and X group The number of carbon atoms of the substituent when is substituted is not included.
- hydroxide atom includes isotopes having different neutron numbers, that is, light hydrogen (protium), deuterium (deuterium) and tritium (tritium).
- an optional substituent when referred to as “substituted or unsubstituted” is an alkyl group having 1 to 50 carbon atoms (preferably 1 to 10, more preferably 1 to 5); 3 to 50 ring carbon atoms (preferably 3 carbon atoms).
- aryl group having 6 to 50 ring carbon atoms (preferably 6 to 24, more preferably 6 to 12); ring carbon number 6 to 50 (preferably 6 to 6) 24, more preferably 6 to 12) aryl group having 1 to 50 carbon atoms (preferably 1 to 10 and more preferably 1 to 5) having an aryl group; amino group; 1 to 50 carbon atoms (preferably 1 to A mono- or dialkylamino group having an alkyl group of 10, more preferably 1 to 5); a mono- or diaryl having an aryl group having a ring carbon number of 6 to 50 (preferably 6 to 24, more preferably 6 to 12) Ami Group: an alkoxy group having an alkyl group having 1 to 50 carbon atoms (preferably 1 to 10, more preferably 1 to 5); a ring carbon number 6 to 50 (preferably 6 to 24, more preferably 6 to 12) An aryloxy group having an aryl group; an alkyl group having 1 to 50 carbon atoms (preferably 6 to 24, more preferably 6 to 12) An aryloxy group
- the aromatic amine derivative of the present invention is represented by the following formula (1).
- Ar 1 represents a group selected from the following formulas (2) to (4).
- Ar 2 represents a group selected from the following formulas (6) to (15).
- L represents a single bond or a divalent group represented by the following formula (16).
- L in formula (1) preferably represents a single bond or a phenylene group, more preferably a single bond.
- L in the formulas (2) to (4) and (10) to (14) is preferably a single bond or a phenylene group, more preferably a phenylene group, and is a 2- or 4-position of a dibenzofuran skeleton and a dibenzothiophene skeleton, fluorene It is preferable to bond to the 2-position of the skeleton.
- the aromatic amine derivative of the formula (1) has a plurality of L, the plurality of L may be the same or different.
- R 1 is a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20, preferably 1 to 5, more preferably 1 to 4 carbon atoms.
- 1 to 4 fluoroalkyl group substituted or unsubstituted carbon number 1 to 20, preferably 1 to 5, more preferably 1 to 4 alkoxy group, substituted or unsubstituted carbon number 1 to 20, preferably It represents 1 to 5, more preferably 1 to 4, a fluoroalkoxy group or a cyano group.
- the aromatic amine derivative of the formula (1) has a plurality of R 1 , the plurality of R 1 may be the same or different.
- alkyl group having 1 to 20 carbon atoms examples include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, t-butyl group, pentyl group (isomer) ), Hexyl group (including isomer), heptyl group (including isomer), octyl group (including isomer), nonyl group (including isomer), decyl group (including isomer), undecyl Groups (including isomers), dodecyl groups (including isomers), and the like, such as methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s-butyl group, t -Butyl group and pentyl group (including isomers) are preferable, and methyl group, ethyl group
- aryl group having 6 to 50 ring carbon atoms examples include phenyl, naphthylphenyl, biphenylyl, terphenylyl, biphenylenyl, naphthyl, phenylnaphthyl, acenaphthylenyl, anthryl, benzoanthryl.
- the halogen atom is a fluorine atom, a chlorine atom, a bromine atom or an iodine atom, and a fluorine atom is particularly preferred.
- the fluoroalkyl group having 1 to 20 carbon atoms is obtained, for example, by substituting at least one hydrogen atom, preferably 1 to 7 hydrogen atoms, in the above alkyl group having 1 to 20 carbon atoms with a fluorine atom.
- a trifluoromethyl group is more preferable, and a trifluoromethyl group is particularly preferable.
- the alkoxy group having 1 to 20 carbon atoms is represented by —OR 10 , and R 10 represents the above alkyl group having 1 to 20 carbon atoms.
- the alkoxy group is preferably a t-butoxy group, a propoxy group, an ethoxy group or a methoxy group, more preferably an ethoxy group or a methoxy group, and particularly preferably a methoxy group.
- the C 1-20 fluoroalkoxy group is represented by —OR 11 , and R 11 represents the above-described fluoroalkyl group having 1-20 carbon atoms.
- the fluoroalkoxy group is preferably a heptafluoropropoxy group, a pentafluoroethoxy group, a 2,2,2-trifluoroethoxy group, or a trifluoromethoxy group, preferably a pentafluoroethoxy group or a 2,2,2-trifluoroethoxy group.
- a trifluoromethoxy group is more preferable, and a trifluoromethoxy group is particularly preferable.
- R 1 bonded to the fluorene skeleton of the formula (1) is a hydrogen atom, the halogen atom (fluorine atom), the alkyl group (methyl group, t-butyl group), the aryl group ( Phenyl group), and preferably bonded to the 7-position of the fluorene skeleton.
- R 1 is particularly preferably a hydrogen atom.
- R 1 in formulas (2), (3), (12) and (13) is preferably a hydrogen atom, the alkyl group (methyl group), or the aryl group (phenyl group).
- R 1 is particularly preferably a hydrogen atom.
- R 1 in the formulas (4), (14) and (15) is preferably a hydrogen atom, a methyl group, a t-butyl group, or a phenyl group, and the 7th position of the fluorene skeleton, It is preferably bonded to the 3rd or 6th position of the carbazole skeleton.
- R 1 is particularly preferably a hydrogen atom.
- R 1 in the formulas (6) to (9) is a hydrogen atom, the alkyl group (methyl group, t-butyl group), the halogen atom (fluorine atom), the fluoroalkyl group (trifluoro). It is preferably a group selected from a methyl group), the alkoxy group (methoxy group), the fluoroalkoxy group (trifluoromethoxy group), and a cyano group.
- R 1 is preferably bonded to the ortho position and / or the para position of the terminal phenyl group and the ortho position and / or the meta position of the phenylene group.
- R 1 is particularly preferably a hydrogen atom.
- R 1 in formulas (10) and (11) is preferably a hydrogen atom, a methyl group, a t-butyl group, or a phenyl group, and R 1 is at the 6-position or 7-position of the naphthalene skeleton. Bonding is preferred.
- R 1 is particularly preferably a hydrogen atom.
- R 2 and R 3 may be the same or different, and each independently represents a hydrogen atom, a substituted or unsubstituted carbon number of 1 to 20, preferably 1 to 5, more preferably 1 to 4.
- it is a 3-12 heterocyclic group, a halogen atom, a substituted or unsubstituted C 1-20, preferably 1-5, more preferably 1-4 C fluoroalkyl group, a substituted or unsubstituted C 1 -C.
- the aromatic amine derivative of formula (1) has a plurality of R 2 s , the plurality of R 2 s may be the same or different, and when they have a plurality of R 3 s , the plurality of R 3 s are the same or different. May be.
- R 2 and R 3 represent an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 50 ring carbon atoms, a halogen atom, a fluoroalkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a carbon number
- the 1-20 fluoroalkoxy groups are the same as the respective groups described for R 1 .
- the heterocyclic group having 3 to 50 ring atoms contains at least 1, preferably 1 to 3 heteroatoms such as nitrogen atom, sulfur atom and oxygen atom.
- the heterocyclic group include a pyrrolyl group, a furyl group, a thienyl group, a pyridyl group, a pyridazinyl group, a pyrimidinyl group, a pyrazinyl group, a triazinyl group, an imidazolyl group, an oxazolyl group, a thiazolyl group, an isoxazolyl group, an isothiazolyl group.
- a pyrazinyl group, a triazinyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, and a dibenzothiophenyl group are preferable, and a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, and a dibenzothiophenyl group are more preferable.
- the aryloxy group having 6 to 50 ring carbon atoms is represented by —OR 12 , and R 12 represents the aryl group having 6 to 50 ring carbon atoms described for R 1 .
- R 12 is preferably a terphenyl group, a biphenyl group, or a phenyl group, more preferably a biphenyl group or a phenyl group, and particularly preferably a phenyl group.
- examples of R 2 and R 3 a hydrogen atom, the alkyl group (methyl group, t- butyl group), the aryl group (phenyl group), or a cyano group is preferable, also, R 2 and Each R 3 is preferably bonded to the para position of the phenyl group.
- R 2 and R 3 are particularly preferably a hydrogen atom.
- two R 4 s may be the same or different and are each independently a hydrogen atom, a substituted or unsubstituted carbon number of 1 to 20, preferably 1 to 5, more preferably An alkyl group having 1 to 4 carbon atoms, a substituted or unsubstituted carbon group having 6 to 50 carbon atoms, preferably 6 to 24, more preferably 6 to 12 aryl groups, and a substituted or unsubstituted ring atom number 3 to 50, preferably 3 To 24, more preferably 3 to 12 heterocyclic group, halogen atom, substituted or unsubstituted C 1-20, preferably 1 to 5, more preferably 1 to 4 fluoroalkyl group, substituted or unsubstituted An alkoxy group having 1 to 20, preferably 1 to 5, more preferably 1 to 4 carbon atoms, or a substituted or unsubstituted fluoroalkoxy group having 1 to 20, preferably 1 to 5, more preferably 1 to 4 carbon atoms
- Substituted or unsubstituted C 6 to 50 preferably a 6-24, more preferably 6-12 aryloxy group, or a cyano group.
- R 2 , R 3 and R 4 may be the same or different. Good.
- the groups represented by two R 4 are defined in the same manner as the groups represented by R 2 and R 3 .
- two R 4 s are each selected from the alkyl group (methyl group) and the aryl group (phenyl group).
- k is an integer of 1 to 5, preferably an integer of 1 to 3, and more preferably 1.
- m is an integer of 1 to 4, preferably an integer of 1 to 3, and more preferably 1.
- n is an integer of 1 to 3, preferably an integer of 1 to 2, more preferably 1.
- the aromatic amine derivative of the formula (1) is preferably represented by the following formula (20).
- Ar 1 is preferably a group selected from the following formulas (21) to (25).
- Ar 1 is more preferably a group selected from the following formulas (26) to (30).
- the groups represented by the above formulas (26) to (30) partially include a parabiphenyl structure.
- the para-position of the benzene ring directly bonded to the central nitrogen atom is a highly electrochemically fragile site with high electron density.
- the parabiphenyl structure protects the compound with a phenyl group instead of being unsubstituted. As a result, the deterioration of the material is suppressed, and as a result, the lifetime of the organic EL element is extended.
- Formulas (7), (8) and (9) represented by Ar 2 can be represented by the following formulas (7-1), (7-2), (8-1) and (9-1), respectively. preferable.
- R 1 , k, m, and n are as defined in formulas (7), (8), and (9), respectively).
- Formulas (12), (13) and (14) represented by Ar 2 are represented by the following formulas (31) to (35): (In formulas (31) to (35), R 1 , R 4 , L and m are as defined in formulas (12) to (14), respectively.) It is preferable that the following formulas (36) to (40): (In formulas (36) to (40), R 1 , R 4 and m are as defined in formulas (2) to (4), respectively) are more preferable.
- aromatic amine derivative of the present invention represented by the formula (1) are shown below, but are not limited to the following compounds.
- the aromatic amine derivative represented by the formula (1) of the present invention is useful as a material for an organic EL device, particularly as a hole injection layer material or a hole transport layer material.
- the method for producing the aromatic amine derivative of the present invention is not particularly limited, and those skilled in the art can easily produce the aromatic amine derivative by utilizing and modifying known synthetic reactions while referring to the examples of the present specification.
- the structure of the organic EL element of the present invention will be described.
- the following (1) to (13) may be mentioned, but the invention is not particularly limited thereto.
- the element configuration (8) is preferably used.
- Anode / light emitting layer / cathode (2) Anode / hole injection layer / light emitting layer / cathode (3) Anode / light emitting layer / electron injection layer / cathode (4) Anode / hole injection layer / light emitting layer / electron Injection layer / cathode (5) anode / organic semiconductor layer / light emitting layer / cathode (6) anode / organic semiconductor layer / electron barrier layer / light emitting layer / cathode (7) anode / organic semiconductor layer / light emitting layer / adhesion improving layer / Cathode (8) Anode / hole injection layer / hole transport layer / light emitting layer / (electron transport layer /) electron injection layer / cathode (9) anode / insulating layer / light emitting layer / insulating layer / cathode (10) anode / Inorganic semiconductor layer / insulating layer / light
- the aromatic amine derivative of the present invention is hardly crystallized and may be used for any of the above organic thin film layers, but from the viewpoint of driving at a lower voltage, hole injection It is preferably contained in the layer or the hole transport layer, and more preferably contained in the hole transport layer.
- the organic EL device using the aromatic amine derivative of the present invention is not only capable of being driven at a low voltage, but also has high luminous efficiency and a long lifetime.
- the amount of the aromatic amine derivative of the present invention contained in the organic thin film layer is preferably 30 to 100 mol% with respect to all components of the organic thin film layer, More preferably, it is 50 to 100 mol%, further preferably 80 to 100 mol%, and particularly preferably substantially 100 mol%.
- each layer of the organic EL device having a structure in which the aromatic amine derivative of the present invention is contained in a hole transport layer will be described.
- the organic EL element is usually produced on a translucent substrate.
- This translucent substrate is a substrate that supports the organic EL element, and preferably has a visible light transmittance of 50% or more in the wavelength range of 400 to 700 nm, and more preferably a smooth substrate is used.
- Examples of such a translucent substrate include a glass plate and a synthetic resin plate.
- Examples of the glass plate include soda-lime glass, barium / strontium-containing glass, lead glass, aluminosilicate glass, borosilicate glass, barium borosilicate glass, quartz, and the like.
- the synthetic resin plate include plates made of polycarbonate resin, acrylic resin, polyethylene terephthalate resin, polyether sulfide resin, polysulfone resin, and the like.
- Anode plays a role of injecting holes into the hole transport layer or the light emitting layer, and it is effective to have a work function of 4 eV or more (preferably 4.5 eV or more).
- Specific examples of anode materials include carbon, aluminum, vanadium, iron, cobalt, nickel, tungsten, silver, gold, platinum, palladium and their alloys, ITO substrate, tin oxide used for NESA substrate, indium oxide, etc. And organic conductive resins such as polythiophene and polypyrrole.
- the anode is obtained by forming a thin film from these anode materials by a method such as vapor deposition or sputtering.
- the transmittance of the anode for light emission is greater than 10%.
- the sheet resistance of the anode is preferably several hundred ⁇ / ⁇ or less.
- the film thickness of the anode varies depending on the material, but is usually 10 nm to 1 ⁇ m, preferably 10 nm to 200 nm.
- Cathode As the cathode, a material having a work function (less than 4 eV) metal, alloy, electrically conductive compound, and a mixture thereof is used.
- electrode materials include magnesium, calcium, tin, lead, titanium, yttrium, lithium, ruthenium, manganese, aluminum, lithium fluoride and the like, and alloys thereof, but are not particularly limited thereto. It is not a thing.
- the alloy include magnesium / silver, magnesium / indium, lithium / aluminum, and the like, but are not particularly limited thereto.
- the ratio of the alloy is controlled by the temperature of the vapor deposition source, the atmosphere, the degree of vacuum, etc., and is selected to an appropriate ratio.
- the anode and the cathode may be formed of two or more layers.
- This cathode is obtained by forming a thin film of these electrode materials by a method such as vapor deposition or sputtering.
- the transmittance of the cathode for light emission is preferably greater than 10%.
- the sheet resistance as a cathode is preferably several hundred ⁇ / ⁇ or less, and the thickness of the cathode is usually 10 nm to 1 ⁇ m, preferably 50 nm to 200 nm.
- an insulating layer made of an insulating thin film layer may be inserted between the pair of electrodes.
- the material used for the insulating layer include aluminum oxide, lithium fluoride, lithium oxide, cesium fluoride, cesium oxide, magnesium oxide, magnesium fluoride, calcium oxide, calcium fluoride, aluminum nitride, titanium oxide, and silicon oxide. Germanium oxide, silicon nitride, boron nitride, molybdenum oxide, ruthenium oxide, vanadium oxide, and the like. A mixture or laminate of these may be used.
- Light emitting layer The light emitting layer of the organic EL device has the following functions (1) to (3).
- Injection function A function capable of injecting holes from the anode or the hole injection layer and applying electrons from the cathode or the electron injection layer when an electric field is applied.
- Transport function A function of moving injected charges (electrons and holes) by the force of an electric field.
- Light emission function A function that provides a field for recombination of electrons and holes and connects it to light emission. There may be a difference in the ease of injecting holes into the light emitting layer and the ease of injecting electrons, and the hole transport ability and electron transport of the light emitting layer expressed by hole mobility and electron mobility. Although the performance may be different, it is preferable to move one of the charges.
- the host material or doping material that can be used for the light emitting layer is not particularly limited.
- the hole injection layer / hole transport layer is a layer that assists hole injection into the light emitting layer and transports holes to the light emitting region, and has a high hole mobility.
- the ionization energy is usually as small as 5.7 eV or less.
- a hole injection layer / hole transport layer a material that transports holes to the light emitting layer with lower electric field strength is preferable, and the hole mobility is, for example, 10 4 to 10 6 V / cm. It is preferably 10 ⁇ 4 cm 2 / V ⁇ second or more when an electric field is applied.
- the aromatic amine derivative of the present invention is preferably used as a hole injection layer material, particularly as a hole transport layer material.
- the hole transport layer may be formed of the aromatic amine derivative of the present invention alone or may be formed of a mixture with other materials.
- Other materials for forming the hole transport layer by mixing with the aromatic amine derivative of the present invention are not particularly limited as long as they have the above-mentioned preferable properties.
- a hole transport material in an optical transmission material Arbitrary things can be selected and used from what is conventionally used and the well-known thing used for the positive hole transport layer of an organic EL element.
- a material that has a hole transporting ability and can be used in the hole transporting zone is referred to as a hole transporting material.
- phthalocyanine derivatives examples include phthalocyanine derivatives, naphthalocyanine derivatives, porphyrin derivatives, oxazoles, oxadiazoles, triazoles, imidazoles, imidazolones, imidazolethiones, pyrazolines.
- Pyrazolone tetrahydroimidazole, oxazole, oxadiazole, hydrazone, acylhydrazone, polyarylalkane, stilbene, butadiene, benzidine type triphenylamine, styrylamine type triphenylamine, diamine type triphenylamine, etc.
- polymer materials such as polyvinyl carbazole, polysilane, and conductive polymer, but are not particularly limited thereto.
- the material for the hole injection layer is not particularly limited as long as it has the above-mentioned preferable properties, and conventionally used as a hole injection material in a photoconductive material, or hole transport of an organic EL element. Any of known materials used for the layer can be selected and used. In the present invention, a material that has a hole injection capability and can be used in a hole injection zone is referred to as a hole injection material. Sensitization can also be performed by adding an electron accepting substance to the hole injection material.
- a hexaazatriphenylene compound represented by the following formula (A) is preferable to use as a hole injection material.
- R 111 to R 116 each independently represents a cyano group, —CONH 2 , a carboxyl group, or —COOR 117 (R 117 is an alkyl group having 1 to 20 carbon atoms).
- R 111 and R 112 , R 113 and R 114 , or R 115 and R 116 together represent a group represented by —CO—O—CO—.
- R 111 to R 116 are the same and each represents a cyano group, —CONH 2 , a carboxyl group, or —COOR 117 .
- R 111 and R 112 , R 113 and R 114 , and R 115 and R 116 together represent a group represented by —CO—O—CO—.
- Examples of other hole injection materials that can be used in the organic EL device of the present invention include aromatic tertiary amine derivatives and phthalocyanine derivatives.
- aromatic tertiary amine derivative examples include triphenylamine, tolylamine, tolyldiphenylamine, N, N′-diphenyl-N, N ′-(3-methylphenyl) -1,1′-biphenylyl-4, 4′-diamine, N, N, N ′, N ′-(4-methylphenyl) -1,1′-phenyl-4,4′-diamine, N, N, N ′, N ′-(4-methyl Phenyl) -1,1′-biphenylyl-4,4′-diamine, N, N′-diphenyl-N, N′-dinaphthyl-1,1′-biphenylyl-4,4′-diamine, N, N '-(Methylphenyl) -N, N'-(4-n-butylphenyl) -phenanthrene-9,10-diamine, N, N-bis (4-d
- phthalocyanine (Pc) derivative examples include H 2 Pc, CuPc, CoPc, NiPc, ZnPc, PdPc, FePc, MnPc, ClAlPc, ClGaPc, ClInPc, ClSnPc, Cl 2 SiPc, (HO) AlPc, (HO) GaPc, Examples include, but are not limited to, phthalocyanine derivatives and naphthalocyanine derivatives such as VOPc, TiOPc, MoOPc, and GaPc—O—GaPc.
- the organic EL device of the present invention includes a layer containing these aromatic tertiary amine derivatives and / or phthalocyanine derivatives, for example, the hole transport layer or the hole injection layer, between the light emitting layer and the anode. It is preferable to have.
- Sensitization can also be performed by adding an electron acceptor to the hole injection material.
- Electron injection layer / electron transport layer is a layer that assists the injection of electrons into the light emitting layer and transports electrons to the light emitting region, and has a high electron mobility.
- the adhesion improving layer is an electron injection layer made of a material with particularly good adhesion to the cathode. Since the emitted light is reflected by an electrode (in this case, a cathode), it is known that light emitted directly from the anode interferes with light emitted from the anode via reflection by the electrode. In order to efficiently use this interference effect, the electron transport layer is appropriately selected with a film thickness of several nanometers to several micrometers.
- the electron mobility is at least 10 ⁇ 5 cm 2 / Vs or more when an electric field of cm is applied.
- materials used for the electron injection layer include fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, fluorenylidenemethane, anthra.
- quinodimethane, anthrone, etc. and derivatives thereof are mentioned, it is not particularly limited to these. Further, it can be sensitized by adding an electron donating substance to the electron injection material.
- metal complex compounds examples include 8-hydroxyquinolinate lithium, tris (8-hydroxyquinolinate) aluminum, bis (2-methyl-8-quinolinato) (1-naphtholato) aluminum, and the like. It is not limited to these.
- the nitrogen-containing five-membered derivative for example, oxazole, thiazole, oxadiazole, thiadiazole, and triazole derivatives are preferable.
- the nitrogen-containing five-membered derivative is preferably a benzimidazole derivative represented by any of the following formulas (1) to (3).
- Z 1 , Z 2 and Z 3 are each independently a nitrogen atom or a carbon atom.
- R 11 and R 12 are each independently a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 60 ring carbon atoms, or an alkyl group having 1 to 20 carbon atoms.
- m is an integer of 0 to 5, and when m is an integer of 2 or more, the plurality of R 11 may be the same as or different from each other.
- R 11 's may be bonded to each other to form a substituted or unsubstituted aromatic hydrocarbon ring.
- the substituted or unsubstituted aromatic hydrocarbon ring include a benzene ring, a naphthalene ring, and an anthracene ring.
- Ar 1 is a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 3 to 60 ring carbon atoms.
- Ar 2 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a haloalkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms, or a substituted group. Alternatively, it is an unsubstituted heteroaryl group having 3 to 60 ring carbon atoms.
- Ar 3 is a substituted or unsubstituted arylene group having 6 to 60 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 3 to 60 ring carbon atoms.
- L 1 , L 2 and L 3 are each independently a single bond, a substituted or unsubstituted arylene group having 6 to 60 ring carbon atoms, a substituted or unsubstituted hetero condensed ring group having 9 to 60 ring atoms, or a substituted group. Or it is an unsubstituted fluorenylene group.
- the layer containing the aromatic amine derivative of the present invention may contain a light emitting material, a doping material, a hole injection material, or an electron injection material.
- a known light-emitting material, doping material, hole injecting material, and electron injecting material can be used as necessary. It can also be used as a doping material.
- An organic EL element can prevent the brightness
- the hole transport layer of the organic EL device of the present invention may have a two-layer structure of a first hole transport layer (anode side) and a second hole transport layer (cathode side).
- the aromatic amine derivative of the present invention may be contained in either the first hole transport layer or the second hole transport layer.
- a protective layer is provided on the surface of the device, or the entire device is protected by silicon oil, resin, or the like. It is also possible.
- each layer of the organic EL device of the present invention any of dry deposition methods such as vacuum deposition, sputtering, plasma and ion plating, and wet deposition methods such as spin coating, dipping and flow coating should be used. Can do.
- a thin film is formed using a solution or dispersion obtained by dissolving or dispersing a material for forming each layer in an appropriate solvent such as ethanol, chloroform, tetrahydrofuran, or dioxane.
- the solution or dispersion may contain a resin or an additive for improving film formability, preventing pinholes in the film, and the like.
- the resin include insulating resins such as polystyrene, polycarbonate, polyarylate, polyester, polyamide, polyurethane, polysulfone, polymethyl methacrylate, polymethyl acrylate, and cellulose, and copolymers thereof, poly-N-vinylcarbazole, polysilane.
- photoconductive resins such as polythiophene and polypyrrole.
- the additive include an antioxidant, an ultraviolet absorber, and a plasticizer.
- the film thickness of each layer is not particularly limited, and may be a film thickness that provides good device performance. If the film thickness is too thick, a large applied voltage is required to obtain a constant light output, resulting in poor efficiency. If the film thickness is too thin, pinholes and the like are generated, and sufficient light emission luminance cannot be obtained even when an electric field is applied.
- the normal film thickness is suitably in the range of 5 nm to 10 ⁇ m, but more preferably in the range of 10 nm to 0.2 ⁇ m.
- Synthesis Example 4 (Production of aromatic amine derivative (H4)) A reaction was conducted in the same manner as in Synthesis Example 1 except that 2.3 g of 4-bromobiphenyl was used instead of the intermediate 1-1. As a result, 3.6 g of white crystals were obtained. The following aromatic amine derivative (H4) was identified by analysis of FD-MS. (Yield 50%)
- Synthesis Example 6 (Production of aromatic amine derivative (H6)) A reaction was conducted in the same manner as in Synthesis Example 5 except that 2.3 g of 4-bromobiphenyl was used instead of 2-bromobiphenyl, to obtain 2.7 g of white crystals. The following aromatic amine derivative (H6) was identified by analysis of FD-MS. (Yield 40%)
- Synthesis Example 7 (Production of aromatic amine derivative (H7)) In Synthesis Example 1, the reaction was performed in the same manner except that 3.4 g of Intermediate 1-9 was used instead of Intermediate 1-1, and 5.9 g of Intermediate 2-4 was used instead of Intermediate 2-1. As a result, 4.7 g of white crystals were obtained.
- the following aromatic amine derivative (H7) was identified by analysis of FD-MS. (Yield 55%)
- Synthesis Example 8 (Production of aromatic amine derivative (H8)) In Synthesis Example 1, the reaction was performed in the same manner except that 3.4 g of intermediate 1-13 was used instead of intermediate 1-1 and 5.9 g of intermediate 2-5 was used instead of intermediate 2-1. As a result, 5.1 g of white crystals was obtained. The following aromatic amine derivative (H8) was identified by analysis of FD-MS. (Yield 55%) Example
- Example 1-1 Production of Organic EL Element
- a glass substrate with a transparent electrode line of 25 mm ⁇ 75 mm ⁇ 1.1 mm (manufactured by Geomatic Co., Ltd.) was ultrasonically cleaned in isopropyl alcohol for 5 minutes and further UV-cleaned with UV (Ultraviolet) for 30 minutes.
- a glass substrate with a transparent electrode line after washing is mounted on a substrate holder of a vacuum deposition apparatus, and first the following electron-accepting compound (A) is deposited so as to cover the transparent electrode on the surface where the transparent electrode line is formed. Then, a film A having a thickness of 5 nm was formed.
- the following aromatic amine derivative (X1) was vapor-deposited as a first hole transport material to form a first hole transport layer having a thickness of 160 nm.
- the following aromatic amine derivative (H1) was deposited as a second hole transport material to form a second hole transport layer having a thickness of 10 nm.
- a host compound (BH) and a dopant compound (BD) were co-evaporated with a thickness of 25 nm to form a light emitting layer.
- the concentration of the dopant compound (BD) was 4% by mass.
- the following compound (ET1) was co-deposited with a thickness of 20 nm, followed by the following compound (ET2) with a thickness of 10 nm, and Li with a thickness of 25 nm to form an electron transport / injection layer. did.
- the concentration of Li was 4% by mass.
- metal Al was laminated to a thickness of 80 nm to form a cathode, and an organic EL element was manufactured.
- Examples 1-2 to 1-6 Organic EL devices of Examples 1-2 to 1-6 were produced in the same manner as Example 1-1 except that the following aromatic amine derivatives listed in Table 1 were used as the second hole transport material.
- Comparative Examples 1-1 and 1-2 Organic EL devices of Comparative Examples 1-1 and 1-2 were produced in the same manner as Example 1-1 except that the following aromatic amine derivatives listed in Table 1 were used as the second hole transport material.
- the organic EL element produced as described above is caused to emit light by direct current drive, and the luminance (L) and current density are measured. From the measurement result, the current efficiency (L) at a current density of 10 mA / cm 2 is measured. / J) and driving voltage (V) were obtained. Further, the device lifetime at a current density of 50 mA / cm 2 was determined.
- the 80% life means the time until the luminance is attenuated to 80% of the initial luminance in constant current driving. The results are shown in Table 1.
- Example 2-1 Production of Organic EL Element
- a glass substrate with a transparent electrode line of 25 mm ⁇ 75 mm ⁇ 1.1 mm (manufactured by Geomatic Co., Ltd.) was ultrasonically cleaned in isopropyl alcohol for 5 minutes and further UV-cleaned with UV (Ultraviolet) for 30 minutes.
- a glass substrate with a transparent electrode line after washing is mounted on a substrate holder of a vacuum deposition apparatus, and first the following electron-accepting compound (A) is deposited so as to cover the transparent electrode on the surface where the transparent electrode line is formed. Then, a film A having a thickness of 5 nm was formed.
- the following aromatic amine derivative (H5) was deposited as a first hole transport material to form a first hole transport layer having a thickness of 160 nm.
- the following aromatic amine derivative (Y1) was deposited as a second hole transport material to form a second hole transport layer having a thickness of 10 nm.
- a host compound (BH) and a dopant compound (BD) were co-evaporated with a thickness of 25 nm to form a light emitting layer.
- the concentration of the dopant compound (BD) was 4% by mass.
- the following compound (ET1) was co-deposited with a thickness of 20 nm, followed by the following compound (ET2) with a thickness of 10 nm, and Li with a thickness of 25 nm to form an electron transport / injection layer. did.
- the concentration of Li was 4% by mass.
- metal Al was laminated at a thickness of 80 nm to form a cathode, and an organic EL element was manufactured.
- Examples 2-2 to 2-4 Each organic of Examples 2-2 to 2-4 was the same as Example 2-1 except that the following aromatic amine derivatives listed in Table 2 were used as the first hole transport material and the second hole transport material. An EL element was produced.
- Comparative Examples 2-1 and 2-2 Organic EL elements of Comparative Examples 2-1 and 2-2 were produced in the same manner as in Examples 2-1 and 2-2, respectively, except that NPD was used as the first hole transport material.
- the organic EL element produced as described above is caused to emit light by direct current drive, and the luminance (L) and current density are measured. From the measurement result, the current efficiency (L) at a current density of 10 mA / cm 2 is measured. / J) and driving voltage (V) were obtained. Further, the device lifetime at a current density of 50 mA / cm 2 was determined.
- the 80% life means the time until the luminance is attenuated to 80% of the initial luminance in constant current driving. The results are shown in Table 2.
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Abstract
Description
mは、1~4の整数である。
nは、1~3の整数である。)
mは1~4の整数、好ましくは1~3の整数、より好ましくは1である。
nは1~3の整数、好ましくは1~2の整数、より好ましくは1である。
で表されることが好ましく、下記式(36)~(40):
本発明の有機EL素子の代表的な素子構成としては、以下の(1)~(13)を挙げることができるが、特にこれらに限定されるものではない。なお、(8)の素子構成が好ましく用いられる。
(1)陽極/発光層/陰極
(2)陽極/正孔注入層/発光層/陰極
(3)陽極/発光層/電子注入層/陰極
(4)陽極/正孔注入層/発光層/電子注入層/陰極
(5)陽極/有機半導体層/発光層/陰極
(6)陽極/有機半導体層/電子障壁層/発光層/陰極
(7)陽極/有機半導体層/発光層/付着改善層/陰極
(8)陽極/正孔注入層/正孔輸送層/発光層/(電子輸送層/)電子注入層/陰極
(9)陽極/絶縁層/発光層/絶縁層/陰極
(10)陽極/無機半導体層/絶縁層/発光層/絶縁層/陰極
(11)陽極/有機半導体層/絶縁層/発光層/絶縁層/陰極
(12)陽極/絶縁層/正孔注入層/正孔輸送層/発光層/絶縁層/陰極
(13)陽極/絶縁層/正孔注入層/正孔輸送層/発光層/(電子輸送層/)電子注入層/陰極
本発明の芳香族アミン誘導体を有機薄膜層、好ましくは正孔注入層又は正孔輸送層に含有させる量は、その有機薄膜層の全成分に対して、好ましくは30~100モル%であり、より好ましくは50~100モル%であり、さらに好ましくは80~100モル%であり、特に好ましくは実質100モル%である。
以下、好ましい形態として、本発明の前記芳香族アミン誘導体を正孔輸送層に含有させた構成の有機EL素子の各層について説明する。
有機EL素子は、通常、透光性基板上に作製する。この透光性基板は有機EL素子を支持する基板であり、波長400~700nmの可視領域の光の透過率が50%以上であるものが好ましく、さらに平滑な基板を用いるのが好ましい。
このような透光性基板としては、例えば、ガラス板、合成樹脂板等が挙げられる。ガラス板としては、ソーダ石灰ガラス、バリウム・ストロンチウム含有ガラス、鉛ガラス、アルミノケイ酸ガラス、ホウケイ酸ガラス、バリウムホウケイ酸ガラス、石英等で成形された板が挙げられる。また、合成樹脂板としては、ポリカーボネート樹脂、アクリル樹脂、ポリエチレンテレフタレート樹脂、ポリエーテルスルフィド樹脂、ポリスルホン樹脂等の板が挙げられる。
陽極は、正孔を正孔輸送層又は発光層に注入する役割を担うものであり、4eV以上(好ましくは4.5eV以上)の仕事関数を有することが効果的である。陽極材料の具体例としては、炭素、アルミニウム、バナジウム、鉄、コバルト、ニッケル、タングステン、銀、金、白金、パラジウム等及びそれらの合金、ITO基板、NESA基板に使用される酸化スズ、酸化インジウム等の金属酸化物、ポリチオフェンやポリピロール等の有機導電性樹脂が挙げられる。
陽極は、これらの陽極材料を蒸着法やスパッタリング法等の方法で薄膜を形成することにより得られる。
発光層からの発光を陽極から取り出す場合、陽極の発光に対する透過率が10%より大きいことが好ましい。また陽極のシート抵抗は、数百Ω/□以下が好ましい。陽極の膜厚は、材料によっても異なるが、通常10nm~1μm、好ましくは10nm~200nmである。
陰極としては、仕事関数の小さい(4eV未満)金属、合金、電気伝導性化合物及びこれらの混合物を電極物質とするものが用いられる。このような電極物質の具体例としては、マグネシウム、カルシウム、錫、鉛、チタニウム、イットリウム、リチウム、ルテニウム、マンガン、アルミニウム、フッ化リチウム等及びそれらの合金が用いられるが、特にこれらに限定されるものではない。該合金としては、マグネシウム/銀、マグネシウム/インジウム、リチウム/アルミニウム等が代表例として挙げられるが、特にこれらに限定されるものではない。合金の比率は、蒸着源の温度、雰囲気、真空度等により制御され、適切な比率に選択される。陽極及び陰極は、必要があれば二層以上の層構成により形成されていてもよい。
この陰極は、これらの電極物質を蒸着やスパッタリング等の方法により薄膜を形成することにより得られる。
ここで、発光層からの発光を陰極から取り出す場合、陰極の発光に対する透過率は10%より大きくすることが好ましい。また、陰極としてのシート抵抗は数百Ω/□以下が好ましく、さらに、陰極の膜厚は、通常10nm~1μm、好ましくは50nm~200nmである。
有機EL素子は、超薄膜に電界を印加するために、リークやショートによる画素欠陥が生じやすい。これを防止するために、一対の電極間に絶縁性の薄膜層からなる絶縁層を挿入してもよい。
絶縁層に用いられる材料としては、例えば、酸化アルミニウム、弗化リチウム、酸化リチウム、弗化セシウム、酸化セシウム、酸化マグネシウム、弗化マグネシウム、酸化カルシウム、弗化カルシウム、窒化アルミニウム、酸化チタン、酸化珪素、酸化ゲルマニウム、窒化珪素、窒化ホウ素、酸化モリブデン、酸化ルテニウム、酸化バナジウム等が挙げられる。なお、これらの混合物や積層物を用いてもよい。
有機EL素子の発光層は下記(1)~(3)の機能を併せ持つ。
(1)注入機能:電界印加時に陽極又は正孔注入層より正孔を注入することができ、陰極又は電子注入層より電子を注入することができる機能。
(2)輸送機能:注入された電荷(電子と正孔)を電界の力で移動させる機能。
(3)発光機能:電子と正孔の再結合の場を提供し、これを発光につなげる機能。
発光層への正孔の注入し易さと電子の注入し易さに違いがあってもよく、また、正孔移動度と電子移動度で表される、発光層の正孔輸送能及び電子輸送能が異なっていてもよいが、どちらか一方の電荷を移動させることが好ましい。
正孔注入層/正孔輸送層は、発光層への正孔注入を助け、正孔を発光領域まで輸送する層であって、正孔移動度が大きく、イオン化エネルギーが通常5.7eV以下と小さい。このような正孔注入層/正孔輸送層としては、より低い電界強度で正孔を発光層に輸送する材料が好ましく、さらに正孔の移動度が、例えば104~106V/cmの電界印加時に、10-4cm2/V・秒以上であることが好ましい。
前記のように、本発明の芳香族アミン誘導体は、正孔注入層材料、特に正孔輸送層材料として好ましく用いられる。正孔輸送層は本発明の芳香族アミン誘導体単独で形成してもよく、他の材料との混合物で形成してもよい。本発明の芳香族アミン誘導体と混合して正孔輸送層を形成する他の材料としては、前記の好ましい性質を有するものであれば特に制限はなく、従来、光導伝材料において正孔輸送材料として慣用されているものや、有機EL素子の正孔輸送層に使用される公知のものの中から任意のものを選択して用いることができる。本発明においては、正孔輸送能を有し、正孔輸送帯域に用いることが可能な材料を正孔輸送材料と呼ぶ。
なお、R111~R116が同一で、シアノ基、-CONH2、カルボキシル基、又は-COOR117を表すことが好ましい。また、R111及びR112、R113及びR114、及びR115及びR116のすべてが一緒になって-CO-O-CO-で示される基を表すことが好ましい。
電子注入層/電子輸送層は、発光層への電子の注入を助け、電子を発光領域まで輸送する層であって、電子移動度が大きい。付着改善層は陰極との付着が特に良い材料からなる電子注入層である。
発光した光が電極(この場合は陰極)により反射するため、直接陽極から取り出される発光と、電極による反射を経由して陽極から取り出される発光とが干渉することが知られている。この干渉効果を効率的に利用するため、電子輸送層は数nm~数μmの膜厚で適宜選ばれるが、特に膜厚が厚いとき、電圧上昇を避けるために、104~106V/cmの電界印加時に電子移動度が少なくとも10-5cm2/Vs以上であることが好ましい。
電子注入層に用いられる材料としては、具体的には、フルオレノン、アントラキノジメタン、ジフェノキノン、チオピランジオキシド、オキサゾール、オキサジアゾール、トリアゾール、イミダゾール、ペリレンテトラカルボン酸、フレオレニリデンメタン、アントラキノジメタン、アントロン等とそれらの誘導体が挙げられるが、特にこれらに限定されるものではない。また、電子注入材料に電子供与性物質を添加することにより増感させることもできる。
前記金属錯体化合物としては、例えば、8-ヒドロキシキノリナートリチウム、トリス(8-ヒドロキシキノリナート)アルミニウム、ビス(2-メチル-8-キノリナート)(1-ナフトラート)アルミニウム等が挙げられるが、特にこれらに限定されるものではない。
前記含窒素五員誘導体としては、例えば、オキサゾール、チアゾール、オキサジアゾール、チアジアゾール、トリアゾール誘導体が好ましい。
特に、本発明においては、前記含窒素五員誘導体として、下記式(1)~(3)のいずれかで表されるベンゾイミダゾール誘導体が好ましい。
R11及びR12は、それぞれ独立に、置換もしくは無置換の環炭素数6~60のアリール基、置換もしくは無置換の環炭素数3~60のヘテロアリール基、炭素数1~20のアルキル基、炭素数1~20のハロアルキル基又は炭素数1~20のアルコキシ基である。
mは、0~5の整数であり、mが2以上の整数であるとき、複数のR11は互いに同一でも異なっていてもよい。また、隣接する2個のR11同士が互いに結合して置換もしくは無置換の芳香族炭化水素環を形成していてもよい。該置換もしくは無置換の芳香族炭化水素環としては、例えばベンゼン環、ナフタレン環、アントラセン環等が挙げられる。
Ar1は、置換もしくは無置換の環炭素数6~60のアリール基又は置換もしくは無置換の環炭素数3~60のヘテロアリール基である。
Ar2は、水素原子、炭素数1~20のアルキル基、炭素数1~20のハロアルキル基、炭素数1~20のアルコキシ基、置換もしくは無置換の環炭素数6~60のアリール基又は置換もしくは無置換の環炭素数3~60のヘテロアリール基である。
Ar3は、置換もしくは無置換の環炭素数6~60のアリーレン基又は置換もしくは無置換の環炭素数3~60のヘテロアリーレン基である。
L1、L2及びL3は、それぞれ独立に、単結合、置換もしくは無置換の環炭素数6~60のアリーレン基、置換もしくは無置換の環原子数9~60のヘテロ縮合環基又は置換もしくは無置換のフルオレニレン基である。
有機EL素子は、複数の有機薄膜層を形成することにより、クエンチングによる輝度や寿命の低下を防ぐことができる。必要があれば、発光材料、ドーピング材料、正孔注入材料、電子注入材料を組み合わせて使用することができる。また、ドーピング材料により、発光輝度や発光効率を向上させ、発光色を変化させることもできる。
アルゴン雰囲気下、4-ヨードブロモベンゼン28.3g(100.0mmol)、ジベンゾフラン-4-ボロン酸22.3g(105.0mmol)、Pd[PPh3]4 2.31g(2.00mmol)にトルエン150ml、ジメトキシエタン150ml、2M Na2CO3水溶液150ml(300.0mmol)を加え、10時間加熱還流攪拌した。
反応終了後、室温に冷却し、試料を分液ロートに移しジクロロメタンにて抽出した。有機層をMgSO4で乾燥後、ろ過、濃縮した。濃縮残渣をシリカゲルカラムクロマトグラフィーにて精製し、26.2gの白色固体を得た。FD-MS分析(電界脱離質量分析)により、下記中間体1-1と同定した。(収率81%)
アルゴン雰囲気下、4'-ブロモアセトアニリド24.0g(112.0mmol)、ジベンゾフラン-4-ボロン酸28.6g(135.0mmol)、Pd[PPh3]4 2.6g(2.24mmol)にトルエン450ml、ジメトキシエタン100ml、2M Na2CO3水溶液110ml(220.0mmol)を加え、10時間加熱還流攪拌した。
反応終了後、室温に冷却し、析出した結晶をろ過した。得られた結晶をテトラヒドロフランに溶解させ、セライト/シリカゲルを通して濾過し、濾液を減圧下で濃縮した。得られた残渣をメタノール/ヘキサンで洗浄、乾燥し、18.0gの白色固体を得た。FD-MSの分析により、下記中間体1-2と同定した。(収率53%)
中間体1-2 18.0g(59.7mmol)にキシレン120ml、水1200ml、エタノール60mlを加え、攪拌した。水酸化カリウム20.0g(360.0mmol)を加え、10時間加熱還流攪拌した。
反応終了後、室温に冷却し、試料を分液ロートに移しトルエンにて抽出した。有機層をMgSO4で乾燥後、ろ過、濃縮した。得られた残渣をキシレンで再結晶し、それを濾取した後、乾燥し、14.7gの白色固体を得た。FD-MSの分析により、下記中間体1-3と同定した。(収率95%)
窒素雰囲気下、ジベンゾフラン150g(0.89mol)に酢酸1000mlを加え加熱溶解させた。さらに、臭素188g(1.18mol)を滴下して加えた後、室温で20時間撹拌した。析出した結晶を濾取し、酢酸、水で順次洗浄した。粗生成物をメタノールにより数回再結晶を繰り返し、66.8gの白色結晶を得た。FD-MSの分析により、下記中間体1-4と同定した。(収率30%)
アルゴン雰囲気下、中間体1-4 24.7g(100.0mmol)に脱水テトラヒドロフラン400mlを加え、-40℃に冷却した。さらに、1.6M濃度のn-ブチルリチウムのヘキサン溶液63ml(100.0mmol)を徐々に加えた。反応溶液を0℃まで加温しながら1時間攪拌した後、反応溶液を再び-78℃まで冷却し、ホウ酸トリメチル26.0g(250.0mmol)の50ml脱水テトラヒドロフラン溶液を滴下して加えた。滴下後、反応溶液を室温で5時間攪拌した。1N塩酸200mlを加え、1時間攪拌後、水層を除去した。有機層をMgSO4で乾燥させ、溶媒を減圧留去した。得られた固体をトルエンで洗浄し、15.2gの白色結晶を得た。(収率72%)
アルゴン雰囲気下、4-ヨードブロモベンゼン28.3g(100.0mmol)、中間体1-5 22.3g(105.0mmol)、Pd[PPh3]4 2.31g(2.00mmol)にトルエン150ml、ジメトキシエタン150ml、2M Na2CO3水溶液150ml(300.0mmol)を加え、10時間加熱還流攪拌した。
反応終了後、試料を分液ロートに移しジクロロメタンにて抽出した。有機層をMgSO4で乾燥後、ろ過、濃縮した。濃縮残渣をシリカゲルカラムクロマトグラフィーにて精製し、24.2gの白色固体を得た。FD-MSの分析により、下記中間体1-6と同定した。(収率75%)
中間体合成例1-2において、ジベンゾフラン-4-ボロン酸の代わりに中間体1-5を28.6g用いた以外は同様に反応を行ったところ、19.1gの白色固体を得た。FD-MSの分析により、下記中間体1-7と同定した。(収率56%)
中間体合成例1-3において、中間体1-2の代わりに中間体1-7を18.0g用いた以外は同様に反応を行ったところ、14.5gの白色固体を得た。FD-MSの分析により、下記中間体1-8と同定した。(収率93%)
アルゴン雰囲気下、4-ヨードブロモベンゼン28.3g(100.0mmol)、ジベンゾチオフェン-4-ボロン酸23.9g(105.0mmol)、Pd[PPh3]4 2.31g(2.00mmol)にトルエン150ml、ジメトキシエタン150ml、2M Na2CO3水溶液150ml(300.0mmol)を加え、10時間加熱還流攪拌した。
反応終了後、室温に冷却し、試料を分液ロートに移しジクロロメタンにて抽出した。有機層をMgSO4で乾燥後、ろ過、濃縮した。濃縮残渣をシリカゲルカラムクロマトグラフィーにて精製し、27.1gの白色固体を得た。FD-MS分析(電界脱離質量分析)により、下記中間体1-9と同定した。(収率80%)
アルゴン雰囲気下、4'-ブロモアセトアニリド24.0g(112.0mmol)、ジベンゾチオフェン-4-ボロン酸30.8g(135.0mmol)、Pd[PPh3]4 2.6g(2.24mmol)にトルエン450ml、ジメトキシエタン100ml、2M Na2CO3水溶液110ml(220.0mmol)を加え、10時間加熱還流攪拌した。
反応終了後、室温に冷却し、析出した結晶をろ過した。得られた結晶をテトラヒドロフランに溶解させ、セライト/シリカゲルを通して濾過し、濾液を減圧下で濃縮した。得られた残渣をメタノール/ヘキサンで洗浄、乾燥し、17.8gの白色固体を得た。FD-MSの分析により、下記中間体1-10と同定した。(収率50%)
中間体1-10 18.0g(56.1mmol)にキシレン120ml、水1200ml、エタノール60mlを加え、攪拌した。水酸化カリウム20.0g(360.0mmol)を加え、10時間加熱還流攪拌した。
反応終了後、室温に冷却し、試料を分液ロートに移しトルエンにて抽出した。有機層をMgSO4で乾燥後、ろ過、濃縮した。得られた残渣をキシレンで再結晶し、それを濾取した後、乾燥し、14.7gの白色固体を得た。FD-MSの分析により、下記中間体1-11と同定した。(収率95%)
中間体合成例1-5において、中間体1-4の代わりに2-ブロモジベンゾチオフェンを26.3g用いた以外は同様に反応を行ったところ、15.0gの白色固体を得た。(収率66%)
中間体合成例1-6において、中間体1-5の代わりに中間体1-12を23.9g用いた以外は同様に反応を行ったところ、25.4gの白色固体を得た。FD-MSの分析により、下記中間体1-13と同定した。(収率75%)
中間体合成例1-2において、ジベンゾフラン-4-ボロン酸の代わりに中間体1-12を30.8g用いた以外は同様に反応を行ったところ、18.1gの白色固体を得た。FD-MSの分析により、下記中間体1-14と同定した。(収率51%)
中間体合成例1-3において、中間体1-2の代わりに中間体1-14を18.0g用いた以外は同様に反応を行ったところ、13.9gの白色固体を得た。FD-MSの分析により、下記中間体1-15と同定した。(収率90%)
アルゴン雰囲気下、2-ブロモ-9,9-ジフェニルフルオレンを19.9g(50.0mmol)、中間体1-3 13.0g(50.0mmol)、t-ブトキシナトリウム9.6g(100.0mmol)に脱水トルエン250mlを加え、撹拌した。酢酸パラジウム225mg(1.0mmol)、トリ-t-ブチルホスフィン202mg(1.0mmol)を加え、80℃にて8時間反応した。
冷却後、反応混合物をセライト/シリカゲルを通して濾過し、濾液を減圧下で濃縮した。得られた残渣をトルエンで再結晶し、それを濾取した後、乾燥し、23.0gの白色固体を得た。FD-MSの分析により、下記中間体2-1と同定した。(収率80%)
中間体合成例2-1において、中間体1-3の代わりに中間体1-8を13.0g用いた以外は同様に反応を行ったところ、23.2gの白色固体を得た。FD-MSの分析により、下記中間体2-2と同定した。(収率81%)
中間体合成例2-1において、中間体1-3の代わりに2-アミノ-9,9-ジメチルフルオレンを10.5g用いた以外は同様に反応を行ったところ、19.7gの白色固体を得た。FD-MSの分析により、下記中間体2-3と同定した。(収率75%)
中間体合成例2-1において、中間体1-3の代わりに中間体1-11を13.8g用いた以外は同様に反応を行ったところ、23.7gの白色固体を得た。FD-MSの分析により、下記中間体2-4と同定した。(収率80%)
中間体合成例2-1において、中間体1-3の代わりに中間体1-15を13.8g用いた以外は同様に反応を行ったところ、22.2gの白色固体を得た。FD-MSの分析により、下記中間体2-5と同定した。(収率75%)
アルゴン雰囲気下、中間体1-1 3.2g(10.0mmol)、中間体2-1 5.8g(10.0mmol)、Pd2(dba)3 0.14g(0.15mmol)、P(tBu)3HBF4 0.087g(0.3mmol)、t-ブトキシナトリウム1.9g(20.0mmol)に、無水キシレン50mlを加えて8時間加熱還流した。
反応終了後、反応液を50℃に冷却し、セライト/シリカゲルを通して濾過を行い、濾液を濃縮した。得られた濃縮残渣をシリカゲルカラムクロマトグラフィーにて精製し白色固体を得た。粗生成物をトルエンにて再結晶し、3.7gの白色結晶を得た。FD-MSの分析により、下記芳香族アミン誘導体(H1)と同定した。(収率45%)
合成実施例1において、中間体1-1の代わりに中間体1-6を3.2g用い、中間体2-1の代わりに中間体2-2を5.8g用いた以外は同様に反応を行ったところ、5.2gの白色結晶を得た。FD-MSの分析により、下記芳香族アミン誘導体(H2)と同定した。(収率63%)
合成実施例1において、中間体1-1の代わりに中間体1-6を3.2g用いた以外は同様に反応を行ったところ、4.5gの白色結晶を得た。FD-MSの分析により、下記芳香族アミン誘導体(H3)と同定した。(収率55%)
合成実施例1において、中間体1-1の代わりに4-ブロモビフェニルを2.3g用いた以外は同様に反応を行ったところ、3.6gの白色結晶を得た。FD-MSの分析により、下記芳香族アミン誘導体(H4)と同定した。(収率50%)
アルゴン雰囲気下、2-ブロモビフェニル 2.3g(10.0mmol)、中間体2-3 5.3g(10.0mmol)、Pd2(dba)3 0.14g(0.15mmol)、P(tBu)3HBF4 0.087g(0.3mmol)、t-ブトキシナトリウム1.9g(20.0mmol)に、無水キシレン50mlを加えて8時間加熱還流した。
反応終了後、反応液を50℃に冷却し、セライト/シリカゲルを通して濾過を行い、濾液を濃縮した。得られた濃縮残渣をシリカゲルカラムクロマトグラフィーにて精製し白色固体を得た。粗生成物をトルエンにて再結晶し、3.1gの白色結晶を得た。FD-MSの分析により、下記芳香族アミン誘導体(H5)と同定した。(収率45%)
合成実施例5において、2-ブロモビフェニルの代わりに4-ブロモビフェニルを2.3g用いた以外は同様に反応を行ったところ、2.7gの白色結晶を得た。FD-MSの分析により、下記芳香族アミン誘導体(H6)と同定した。(収率40%)
合成実施例1において、中間体1-1の代わりに中間体1-9を3.4g用い、中間体2-1の代わりに中間体2-4を5.9g用いた以外は同様に反応を行ったところ、4.7gの白色結晶を得た。FD-MSの分析により、下記芳香族アミン誘導体(H7)と同定した。(収率55%)
合成実施例1において、中間体1-1の代わりに中間体1-13を3.4g用い、中間体2-1の代わりに中間体2-5を5.9g用いた以外は同様に反応を行ったところ、5.1gの白色結晶を得た。FD-MSの分析により、下記芳香族アミン誘導体(H8)と同定した。(収率55%)
有機EL素子の作製
25mm×75mm×1.1mmのITO透明電極ライン付きガラス基板(ジオマティック社製)をイソプロピルアルコール中で5分間超音波洗浄し、さらに、30分間UV(Ultraviolet)オゾン洗浄した。
洗浄後の透明電極ライン付きガラス基板を真空蒸着装置の基板ホルダーに装着し、まず透明電極ラインが形成されている面上に前記透明電極を覆うようにして下記電子受容性化合物(A)を蒸着し、膜厚5nmの膜Aを成膜した。
この膜A上に、第1正孔輸送材料として下記芳香族アミン誘導体(X1)を蒸着し、膜厚160nmの第1正孔輸送層を成膜した。第1正孔輸送層の成膜に続けて、第2正孔輸送材料として下記芳香族アミン誘導体(H1)を蒸着し、膜厚10nmの第2正孔輸送層を成膜した。
この正孔輸送層上に、ホスト化合物(BH)とドーパント化合物(BD)とを厚さ25nmで共蒸着し、発光層を成膜した。ドーパント化合物(BD)の濃度は4質量%であった。
続いて、この発光層上に、下記化合物(ET1)を厚さ20nm、続いて下記化合物(ET2)を厚さ10nm、及びLiを厚さ25nmで共蒸着し、電子輸送/注入層を成膜した。Liの濃度は4質量%であった。
さらに、金属Alを厚さ80nmに積層して陰極を形成し、有機EL素子を製造した。
第2正孔輸送材料として表1に記載の下記芳香族アミン誘導体を用いた以外は実施例1-1と同様にして実施例1-2~1-6の各有機EL素子を作製した。
第2正孔輸送材料として表1に記載の下記芳香族アミン誘導体を用いた以外は実施例1-1と同様にして比較例1-1及び1-2の各有機EL素子を作製した。
以上のようにして作製した有機EL素子を直流電流駆動により発光させ、輝度(L)、電流密度を測定し、測定結果から電流密度10mA/cm2における電流効率(L/J)、駆動電圧(V)を求めた。さらに電流密度50mA/cm2における素子寿命を求めた。ここで、80%寿命とは、定電流駆動時において、輝度が初期輝度の80%に減衰するまでの時間をいう。結果を表1に示す。
有機EL素子の作製
25mm×75mm×1.1mmのITO透明電極ライン付きガラス基板(ジオマティック社製)をイソプロピルアルコール中で5分間超音波洗浄し、さらに、30分間UV(Ultraviolet)オゾン洗浄した。
洗浄後の透明電極ライン付きガラス基板を真空蒸着装置の基板ホルダーに装着し、まず透明電極ラインが形成されている面上に前記透明電極を覆うようにして下記電子受容性化合物(A)を蒸着し、膜厚5nmの膜Aを成膜した。
この膜A上に、第1正孔輸送材料として下記芳香族アミン誘導体(H5)を蒸着し、膜厚160nmの第1正孔輸送層を成膜した。第1正孔輸送層の成膜に続けて、第2正孔輸送材料として下記芳香族アミン誘導体(Y1)を蒸着し、膜厚10nmの第2正孔輸送層を成膜した。
この正孔輸送層上に、ホスト化合物(BH)とドーパント化合物(BD)とを厚さ25nmで共蒸着し発光層を成膜した。ドーパント化合物(BD)の濃度は4質量%であった。
続いて、この発光層上に、下記化合物(ET1)を厚さ20nm、続いて下記化合物(ET2)を厚さ10nm、及びLiを厚さ25nmで共蒸着し、電子輸送/注入層を成膜した。Liの濃度は4質量%であった。
さらに、金属Alを厚さ80nmで積層して陰極を形成し、有機EL素子を製造した。
第1正孔輸送材料及び第2正孔輸送材料として表2に記載の下記芳香族アミン誘導体を用いた以外は実施例2-1と同様にして実施例2-2~2-4の各有機EL素子を作製した。
第1正孔輸送材料としてNPDを用いた以外はそれぞれ実施例2-1及び2-2と同様にして比較例2-1及び2-2の各有機EL素子を作製した。
以上のようにして作製した有機EL素子を直流電流駆動により発光させ、輝度(L)、電流密度を測定し、測定結果から電流密度10mA/cm2における電流効率(L/J)、駆動電圧(V)を求めた。さらに電流密度50mA/cm2における素子寿命を求めた。ここで、80%寿命とは、定電流駆動時において、輝度が初期輝度の80%に減衰するまでの時間をいう。結果を表2に示す。
Claims (7)
- 下記式(1)で表される芳香族アミン誘導体。
(式(1)において、Ar1は、下記式(2)~(4)から選ばれる基を表す。
Ar2は、下記式(6)~(15)から選ばれる基を表す。
式(1)~(4)及び(10)~(14)において、Lは、単結合又は下記式(16)で表される2価の基を表わし、式(1)の芳香族アミン誘導体が複数のLを有する場合、該複数のLは互いに同一でも異なっていてもよい。
式(1)~(4)及び(6)~(16)において、R1は水素原子、置換もしくは無置換の炭素数1~20のアルキル基、置換もしくは無置換の環炭素数6~50のアリール基、ハロゲン原子、置換もしくは無置換の炭素数1~20のフルオロアルキル基、置換もしくは無置換の炭素数1~20のアルコキシ基、置換もしくは無置換の炭素数1~20のフルオロアルコキシ基、又はシアノ基を表わし、式(1)の芳香族アミン誘導体が複数のR1を有する場合、該複数のR1は互いに同一でも異なっていてもよい。
式(1)において、R2及びR3は同一でも異なっていてもよく、それぞれ独立に水素原子、置換もしくは無置換の炭素数1~20のアルキル基、置換もしくは無置換の環炭素数6~50のアリール基、置換もしくは無置換の環形成原子数3~50の複素環基、ハロゲン原子、置換もしくは無置換の炭素数1~20のフルオロアルキル基、置換もしくは無置換の炭素数1~20のアルコキシ基、置換もしくは無置換の炭素数1~20のフルオロアルコキシ基、置換もしくは無置換の環炭素数6~50のアリールオキシ基、又はシアノ基を表し、また、R2が複数存在する場合、該複数のR2は同一でも異なっていてもよく、R3が複数存在する場合、該複数のR3は同一でも異なっていてもよい。
式(4)及び(14)において、2個のR4は同一でも異なっていてもよく、それぞれ独立に水素原子、置換もしくは無置換の炭素数1~20のアルキル基、置換もしくは無置換の環炭素数6~50のアリール基、置換もしくは無置換の環原子数3~50の複素環基、ハロゲン原子、置換もしくは無置換の炭素数1~20のフルオロアルキル基、置換もしくは無置換の炭素数1~20のアルコキシ基、置換もしくは無置換の炭素数1~20のフルオロアルコキシ基、置換もしくは無置換の環炭素数6~50のアリールオキシ基、又はシアノ基を表し、式(1)の芳香族アミン誘導体が式(4)で表される基及び/又は式(14)で表される基を有する場合、R2、R3及びR4は同一でも異なっていてもよい。
kは、1~5の整数である。
mは、1~4の整数である。
nは、1~3の整数である。) - 陽極、陰極、及び該陽極と陰極の間に1層以上の有機薄膜層を有し、該1層以上の有機薄膜層が発光層を含む有機エレクトロルミネッセンス素子であって、該有機薄膜層の少なくとも1層が請求項1~5のいずれかに記載の芳香族アミン誘導体を含有することを特徴とする有機エレクトロルミネッセンス素子。
- 前記有機薄膜層が正孔注入層または正孔輸送層を有し、該正孔注入層または正孔輸送層が前記芳香族アミン誘導体を含有する請求項6に記載の有機エレクトロルミネッセンス素子。
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13833783.7A EP2891648B1 (en) | 2012-08-31 | 2013-08-29 | Aromatic amine derivative, and organic electroluminescent element using the same |
| JP2014533089A JP5849160B2 (ja) | 2012-08-31 | 2013-08-29 | 芳香族アミン誘導体およびこれを用いた有機エレクトロルミネッセンス素子 |
| CN201380045022.3A CN104583176B (zh) | 2012-08-31 | 2013-08-29 | 芳香族胺衍生物和使用了其的有机电致发光元件 |
| KR1020177014653A KR101974757B1 (ko) | 2012-08-31 | 2013-08-29 | 방향족 아민 유도체 및 이것을 이용한 유기 전기발광 소자 |
| US14/424,656 US10014477B2 (en) | 2012-08-31 | 2013-08-29 | Aromatic amine derivative, and organic electroluminescent element using same |
| KR1020157005242A KR101730275B1 (ko) | 2012-08-31 | 2013-08-29 | 방향족 아민 유도체 및 이것을 이용한 유기 전기발광 소자 |
| KR1020167013080A KR101843669B1 (ko) | 2012-08-31 | 2013-08-29 | 방향족 아민 유도체 및 이것을 이용한 유기 전기발광 소자 |
| US15/854,404 US20180123043A1 (en) | 2012-08-31 | 2017-12-26 | Aromatic amine derivative, and organic electroluminescent element using same |
| US16/901,610 US11362279B2 (en) | 2012-08-31 | 2020-06-15 | Aromatic amine derivative, and organic electroluminescent element using same |
| US16/903,952 US11444246B2 (en) | 2012-08-31 | 2020-06-17 | Aromatic amine derivative, and organic electroluminescent element using same |
| US17/750,433 US20220285620A1 (en) | 2012-08-31 | 2022-05-23 | Aromatic amine derivative, and organic electroluminescent element using same |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101730275B1 (ko) | 2017-04-25 |
| US20180123043A1 (en) | 2018-05-03 |
| US10014477B2 (en) | 2018-07-03 |
| KR20160060787A (ko) | 2016-05-30 |
| EP2891648B1 (en) | 2022-02-16 |
| US11444246B2 (en) | 2022-09-13 |
| US20220285620A1 (en) | 2022-09-08 |
| JP2015212299A (ja) | 2015-11-26 |
| TW201412688A (zh) | 2014-04-01 |
| DE202013012834U1 (de) | 2020-03-19 |
| JP5919427B2 (ja) | 2016-05-18 |
| KR20170061727A (ko) | 2017-06-05 |
| CN104583176B (zh) | 2017-09-08 |
| TW201630868A (zh) | 2016-09-01 |
| CN105439999B (zh) | 2020-11-27 |
| US11362279B2 (en) | 2022-06-14 |
| CN107445930A (zh) | 2017-12-08 |
| KR101843669B1 (ko) | 2018-03-29 |
| US20200321526A1 (en) | 2020-10-08 |
| KR101974757B1 (ko) | 2019-05-02 |
| JPWO2014034795A1 (ja) | 2016-08-08 |
| TWI552980B (zh) | 2016-10-11 |
| CN104583176A (zh) | 2015-04-29 |
| EP2891648A4 (en) | 2016-05-11 |
| KR20150048137A (ko) | 2015-05-06 |
| US20200313090A1 (en) | 2020-10-01 |
| EP2891648A1 (en) | 2015-07-08 |
| US20150243891A1 (en) | 2015-08-27 |
| JP5849160B2 (ja) | 2016-01-27 |
| CN105439999A (zh) | 2016-03-30 |
| TWI568711B (zh) | 2017-02-01 |
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