WO2016028110A1 - Pluralité de matériaux hôtes et dispositif électroluminescent organique comprenant ces matériaux - Google Patents

Pluralité de matériaux hôtes et dispositif électroluminescent organique comprenant ces matériaux Download PDF

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Publication number
WO2016028110A1
WO2016028110A1 PCT/KR2015/008727 KR2015008727W WO2016028110A1 WO 2016028110 A1 WO2016028110 A1 WO 2016028110A1 KR 2015008727 W KR2015008727 W KR 2015008727W WO 2016028110 A1 WO2016028110 A1 WO 2016028110A1
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Prior art keywords
substituted
unsubstituted
alkyl
arylsilyl
aryl
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PCT/KR2015/008727
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English (en)
Inventor
Bitnari Kim
Nam-Kyun Kim
Hong-Yeop NA
Tae-Jin Lee
Kyung-Hoon Choi
Jae-Hoon Shim
Young-Jun Cho
Hee-Ryong Kang
Young-Mook Lim
Hyun-Ju Kang
Doo-Hyeon Moon
Ji-Song JUN
Hee-Choon Ahn
Young-Kwang Kim
Jin-Ri HONG
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Rohm And Haas Electronic Materials Korea Ltd.
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Priority claimed from KR1020150116757A external-priority patent/KR102445503B1/ko
Application filed by Rohm And Haas Electronic Materials Korea Ltd. filed Critical Rohm And Haas Electronic Materials Korea Ltd.
Priority to US15/503,742 priority Critical patent/US10069086B2/en
Priority to CN202310013122.3A priority patent/CN116056544A/zh
Priority to CN201580043992.9A priority patent/CN106604911A/zh
Priority to JP2017506861A priority patent/JP6700251B2/ja
Priority to EP15833468.0A priority patent/EP3183234B1/fr
Publication of WO2016028110A1 publication Critical patent/WO2016028110A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/0803—Compounds with Si-C or Si-Si linkages
    • C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
    • C07F7/0812—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te comprising a heterocyclic ring
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
    • H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2101/00—Properties of the organic materials covered by group H10K85/00
    • H10K2101/10—Triplet emission
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2101/00—Properties of the organic materials covered by group H10K85/00
    • H10K2101/90—Multiple hosts in the emissive layer
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/30—Coordination compounds
    • H10K85/341—Transition metal complexes, e.g. Ru(II)polypyridine complexes
    • H10K85/342—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising iridium
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
    • H10K85/6574—Polycyclic condensed heteroaromatic hydrocarbons comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
    • H10K85/6576—Polycyclic condensed heteroaromatic hydrocarbons comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Definitions

  • the present invention relates to a plurality of host materials and an organic electroluminescence device comprising the same.
  • An electroluminescence device is a self-light-emitting device which has advantages in that it provides a wider viewing angle, a greater contrast ratio, and a faster response time.
  • the first organic EL device was developed by Eastman Kodak, by using small aromatic diamine molecules, and aluminum complexes as materials for forming a light-emitting layer [Appl. Phys. Lett. 51, 913, 1987].
  • An organic EL device is a device changing electrical energy to light by applying electricity to an organic electroluminescent material, and generally has a structure comprising an anode, a cathode, and an organic layer between the anode and the cathode.
  • the organic layer of an organic EL device may be comprised of a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer (which comprises host and dopant materials), an electron buffer layer, a hole blocking layer, an electron transport layer, an electron injection layer, etc., and the materials used for the organic layer are categorized by their functions in hole injection material, hole transport material, electron blocking material, light-emitting material, electron buffer material, hole blocking material, electron transport material, electron injection material, etc.
  • the organic EL device due to an application of a voltage, holes are injected from the anode to the light-emitting layer, electrons are injected from the cathode to the light-emitting layer, and excitons of high energies are formed by a recombination of the holes and the electrons.
  • excitons of high energies are formed by a recombination of the holes and the electrons.
  • luminescent organic compounds reach an excited state, and light emission occurs by emitting light from energy due to the excited state of the luminescent organic compounds returning to a ground state.
  • a light-emitting material must have high quantum efficiency, high electron and hole mobility, and the formed light-emitting material layer must be uniform and stable.
  • Light-emitting materials are categorized into blue, green, and red light-emitting materials dependent on the color of the light emission, and additionally yellow or orange light-emitting materials.
  • light-emitting materials can also be categorized into host and dopant materials according to their functions.
  • the host material which acts as a solvent in a solid state and transfers energy, needs to have high purity and a molecular weight appropriate for vacuum deposition. Furthermore, the host material needs to have high glass transition temperature and high thermal degradation temperature to achieve thermal stability, high electro-chemical stability to achieve a long lifespan, ease of forming an amorphous thin film, good adhesion to materials of adjacent layers, and non-migration to other layers.
  • a light-emitting material can be used as a combination of a host and a dopant to improve color purity, luminous efficiency, and stability.
  • an EL device having excellent characteristics has a structure comprising a light-emitting layer formed by doping a dopant to a host. Since host materials greatly influence the efficiency and lifespan of the EL device when using a dopant/host material system as a light-emitting material, their selection is important.
  • Korean Patent Appln. Laid-Open No.10-2008-0080306 discloses an organic electroluminescent device using a compound wherein two carbazoles are linked via an arylene as a host material
  • International Publication No. WO 2013/112557 A1 discloses an organic electroluminescent device using a compound wherein a biscarbazole is linked to a carbazole directly or via an arylene as a host material.
  • the references fail to disclose an organic electroluminescent device using a compound wherein a biscarbazole compound comprising an aryl and a compound wherein a dibenzocarbazole is linked to a nitrogen-containing heteroaryl directly or via an arylene as plural host materials.
  • the objective of the present invention is to provide an organic electroluminescent device having a long lifespan while maintaining high luminous efficiency.
  • an organic electroluminescent device comprising at least one light-emitting layer between an anode and a cathode, wherein the light-emitting layer comprises a host and a phosphorescent dopant, the host comprises plural host compounds, at least a first host compound of the plural host compounds is represented by the following formula 1, and a second host compound is represented by the following formula 2:
  • a 1 and A 2 each independently represent a substituted or unsubstituted (C6-C30)aryl, provided that the substituents of A 1 and A 2 are not nitrogen-containing heteroaryls;
  • L 1 represents a single bond, or a substituted or unsubstituted (C6-C30)arylene
  • X 1 to X 16 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsub
  • L represents a single bond, or a substituted or unsubstituted (C6-C30)arylene
  • X and Y each independently represent N or CR 17 ;
  • R 1 to R 17 each independently represent hydrogen, deuterium, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted mono- or di- (C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, or a substituted or unsubstituted di(C1-C30)alkyl(C6-
  • the heteroaryl contains at least one hetero atom selected from B, N, O, S, Si, and P.
  • an organic electroluminescent device having high efficiency and long lifespan is provided, and a display device or a lighting device using the organic electroluminescent device can be manufactured.
  • organic electroluminescent device comprising the organic electroluminescent compounds of formulas 1 and 2 will be described in detail.
  • the compound represented by formula 1 can be represented by formula 3, 4, 5, or 6:
  • a 1 , A 2 , L 1 , and X 1 to X 16 are as defined in formula 1.
  • a 1 and A 2 each independently represent a substituted or unsubstituted (C6-C30)aryl, preferably each independently represent a substituted or unsubstituted (C6-C18)aryl, and more preferably each independently represent a (C6-C18)aryl unsubstituted or substituted with a cyano, a halogen, a (C1-C6)alkyl, a (C6-C12)aryl, or a tri(C6-C12)arylsilyl.
  • a 1 and A 2 each independently may be selected from a group consisting of a substituted or unsubstituted phenyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted fluorenyl, a substituted or unsubstituted benzofluorenyl, a substituted or unsubstituted phenanthrenyl, a substituted or unsubstituted anthracenyl, a substituted or unsubstituted indenyl, a substituted or unsubstituted triphenylenyl, a substituted or unsubstituted pyrenyl, a substituted or unsubstituted tetracenyl, a substituted or unsubstituted perylenyl, a substituted or unsubstituted
  • the substituent of the substituted phenyl, etc. may be a cyano, a halogen, a (C1-C6)alkyl, a (C6-C12)aryl, or a tri(C6-C12)arylsilyl.
  • X 1 to X 16 each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsub
  • X 1 to X 16 may each independently represent hydrogen; a cyano; a (C1-C6)alkyl; a phenyl, a biphenyl, a terphenyl, or a naphthyl, unsubstituted or substituted with a cyano, a (C1-C6)alkyl, or a triphenylsilyl; a dibenzothiophene or a dibenzofuran, unsubstituted or substituted with a (C1-C6)alkyl, a phenyl, a biphenyl, a naphthyl, or a triphenylsilyl; or a triphenylsilyl unsubstituted or substituted with a (C1-C6)alkyl.
  • L 1 represents a single bond, or a substituted or unsubstituted (C6-C30)arylene, preferably represents a single bond, or a substituted or unsubstituted (C6-C15)arylene, and more preferably represents a single bond; or a (C6-C15)arylene unsubstituted or substituted with a cyano, a (C1-C6)alkyl, or a tri(C6-C12)arylsilyl.
  • L 1 can be represented by one of the following formulas 7 to 19:
  • Xi to Xp each independently represent hydrogen, deuterium, a halogen, a cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C2-C30)alkynyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C60)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsub
  • Xi to Xp may each independently represent hydrogen, a halogen, a cyano, a (C1-C10)alkyl, a (C3-C20)cycloalkyl, a (C6-C12)aryl, a (C1-C6)alkyldi(C6-C12)arylsilyl, or a tri(C6-C12)arylsilyl, and more preferably, each independently represent hydrogen, a cyano, a (C1-C6)alkyl, or a tri(C6-C12)arylsilyl.
  • the compound represented by formula 2 can be represented by formula 20 or 21:
  • R 1 to R 17 are as defined in formula 2.
  • L represents a single bond, or a substituted or unsubstituted (C6-C30)arylene, preferably represents a single bond, or a substituted or unsubstituted (C6-C15)arylene, and more preferably represents a single bond, or an unsubstituted (C6-C15)arylene.
  • X and Y each independently represent N or CR 17 .
  • R 1 to R 17 each independently represent hydrogen, deuterium, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted 3- to 30-membered heteroaryl, a substituted or unsubstituted mono- or di- (C6-C30)arylamino, a substituted or unsubstituted (C1-C30)alkyl(C6-C30)arylamino, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, or a substituted or unsubstituted (C1-C30)alkyldilyl, or
  • R 1 to R 12 each independently represent hydrogen, a substituted or unsubstituted (C6-C15)aryl, or a substituted or unsubstituted 5- to 15-membered heteroaryl; or are linked to an adjacent substituent(s) to form a substituted or unsubstituted, mono- or polycyclic, (C6-C15) aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur.
  • R 1 to R 12 each independently represent hydrogen, an unsubstituted (C6-C15)aryl, or a 5- to 15-membered heteroaryl unsubstituted or substituted with a (C6-C12)aryl; or are linked to an adjacent substituent(s) to form a benzofuran, a benzothiophene, or an indole substituted with a phenyl.
  • R 13 to R 16 each independently represent hydrogen, a substituted or unsubstituted (C6-C15)aryl, or a substituted or unsubstituted 5- to 15-membered heteroaryl. More preferably, R 13 to R 16 each independently represent hydrogen, an unsubstituted (C6-C15)aryl, or an unsubstituted 5- to 15-membered heteroaryl.
  • R 17 represents a substituted or unsubstituted (C6-C25)aryl, or a substituted or unsubstituted 5- to 15-membered heteroaryl. More preferably, R 17 represents a (C6-C25)aryl unsubstituted or substituted with a (C6-C20)aryl, or a 5- to 15-membered heteroaryl unsubstituted or substituted with a (C6-C12)aryl.
  • (C1-C30)alkyl is meant to be a linear or branched alkyl having 1 to 30 carbon atoms consisting the chain, in which the number of carbon atoms is preferably 1 to 20, more preferably 1 to 10, and includes methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, etc.;
  • (C2-C30)alkenyl is meant to be a linear or branched alkenyl having 2 to 30 carbon atoms consisting the chain, in which the number of carbon atoms is preferably 2 to 20, more preferably 2 to 10, and includes vinyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 2-methylbut-2-enyl, etc.
  • (C2-C30)alkynyl is meant to be a linear or branched alkynyl having 2 to 30 carbon atoms
  • substituted in the expression “substituted or unsubstituted” means that a hydrogen atom in a certain functional group is replaced with another atom or group, i.e. a substituent.
  • the triarylsilyl of X 1 to X 16 is preferably a triphenylsilyl.
  • the first host compound represented by formula 1 includes the following compounds, but is not limited thereto:
  • the second host compound represented by formula 2 includes the following compounds, but is not limited thereto:
  • the organic electroluminescent device comprises an anode, a cathode, and at least one organic layer between the anode and the cathode.
  • the organic layer comprises a light-emitting layer, and the light-emitting layer comprises a host and a phosphorescent dopant.
  • the host material comprises plural host compounds, at least a first host compound of the plural host compounds is represented by formula 1, and a second host compound is represented by formula 2.
  • the light-emitting layer is a layer from which light is emitted, and can be a single layer or a multi-layer of which two or more layers are stacked. In the light-emitting layer, it is preferable that the doping concentration of the dopant compound based on the host compound is less than 20 wt%.
  • the organic layer comprises a light-emitting layer, and may further comprise at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer, an interlayer, a hole blocking layer, and an electron blocking layer.
  • the weight ratio of the first host material to the second host material is in the range of 1:99 to 99:1.
  • the dopant is preferably at least one phosphorescent dopant.
  • the dopant materials applied to the organic electroluminescent device according to the present invention are not limited, but may be preferably selected from metallated complex compounds of iridium, osmium, copper, and platinum, more preferably selected from ortho-metallated complex compounds of iridium, osmium, copper and platinum, and even more preferably ortho-metallated iridium complex compounds.
  • the phosphorescent dopant is preferably selected from compounds represented by the following formulas 101 to 103.
  • L is selected from the following structures:
  • R 100 represents hydrogen, a substituted or unsubstituted (C1-C30)alkyl, or a substituted or unsubstituted (C3-C30)cycloalkyl;
  • R 101 to R 109 , and R 111 to R 123 each independently represent hydrogen, deuterium, a halogen, a (C1-C30)alkyl unsubstituted or substituted with a halogen(s), a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a cyano, or a substituted or unsubstituted (C1-C30)alkoxy; adjacent substituents of R 106 to R 109 may be linked to each other to form a substituted or unsubstituted fused ring, e.g., fluorene unsubstituted or substituted with alkyl, dibenzothiophene unsubstituted or substituted with alkyl, or dibenzofuran unsubstituted or substituted with alkyl; and adjacent substituents of R 120 to R 123 may be linked to each other
  • R 124 to R 127 each independently represent hydrogen, deuterium, a halogen, a substituted or unsubstituted (C1-C30)alkyl, or a substituted or unsubstituted (C6-C30)aryl; and adjacent substituents of R 124 to R 127 may be linked to each other to form a substituted or unsubstituted fused ring, e.g., fluorene unsubstituted or substituted with alkyl, dibenzothiophene unsubstituted or substituted with alkyl, or dibenzofuran unsubstituted or substituted with alkyl;
  • R 201 to R 211 each independently represent hydrogen, deuterium, a halogen, a (C1-C30)alkyl unsubstituted or substituted with a halogen(s), a substituted or unsubstituted (C3-C30)cycloalkyl, or a substituted or unsubstituted (C6-C30)aryl; and adjacent substituents of R 208 to R 211 may be linked to each other to form a substituted or unsubstituted fused ring, e.g., fluorene unsubstituted or substituted with alkyl, dibenzothiophene unsubstituted or substituted with alkyl, or dibenzofuran unsubstituted or substituted with alkyl;
  • f and g each independently represent an integer of 1 to 3; where f or g is an integer of 2 or more, each of R 100 may be the same or different; and
  • n an integer of 1 to 3.
  • the phosphorescent dopant materials include the following:
  • the organic electroluminescent device according to the present invention may further comprise at least one compound selected from the group consisting of arylamine-based compounds and styrylarylamine-based compounds in the organic layer.
  • the organic layer may further comprise at least one metal selected from the group consisting of metals of Group 1, metals of Group 2, transition metals of the 4 th period, transition metals of the 5 th period, lanthanides and organic metals of d-transition elements of the Periodic Table, or at least one complex compound comprising said metal.
  • At least one layer is preferably placed on an inner surface(s) of one or both electrodes; selected from a chalcogenide layer, a metal halide layer and a metal oxide layer.
  • a chalcogenide (including oxides) layer of silicon or aluminum is preferably placed on an anode surface of an electroluminescent medium layer
  • a metal halide layer or a metal oxide layer is preferably placed on a cathode surface of an electroluminescent medium layer.
  • said chalcogenide includes SiO X (1 ⁇ X ⁇ 2), AlO X (1 ⁇ X ⁇ 1.5), SiON, SiAlON, etc.; said metal halide includes LiF, MgF 2 , CaF 2 , a rare earth metal fluoride, etc.; and said metal oxide includes Cs 2 O, Li 2 O, MgO, SrO, BaO, CaO, etc.
  • a layer selected from a hole injection layer, a hole transport layer, or an electron blocking layer, or formed by a combination thereof can be used.
  • Multi-layers can be used for the hole injection layer in order to lower the hole injection barrier (or hole injection voltage) from the anode to the hole transport layer or the electron blocking layer. Two compounds can be simultaneously used in each layer.
  • the hole transport layer and the electron blocking layer can also be formed of multi-layers.
  • a layer selected from an electron buffer layer, a hole blocking layer, an electron transport layer, or an electron injection layer, or formed by a combination thereof can be used.
  • Multi-layers can be used for the electron buffer layer in order to control the injection of the electrons and enhance the interfacial characteristics between the light-emitting layer and the electron injection layer.
  • Two compounds can be simultaneously used in each layer.
  • the hole blocking layer and the electron transport layer can also be formed of multi-layers, and each layer can comprise two or more compounds.
  • a mixed region of an electron transport compound and a reductive dopant, or a mixed region of a hole transport compound and an oxidative dopant is preferably placed on at least one surface of a pair of electrodes.
  • the electron transport compound is reduced to an anion, and thus it becomes easier to inject and transport electrons from the mixed region to an electroluminescent medium.
  • the hole transport compound is oxidized to a cation, and thus it becomes easier to inject and transport holes from the mixed region to the electroluminescent medium.
  • the oxidative dopant includes various Lewis acids and acceptor compounds; and the reductive dopant includes alkali metals, alkali metal compounds, alkaline earth metals, rare-earth metals, and mixtures thereof.
  • a reductive dopant layer may be employed as a charge-generating layer to prepare an electroluminescent device having two or more electroluminescent layers and emitting white light.
  • each layer of the organic electroluminescent device of the present invention dry film-forming methods such as vacuum evaporation, sputtering, plasma and ion plating methods, or wet film-forming methods such as ink jet printing, nozzle printing, slot coating, spin coating, dip coating, and flow coating methods can be used.
  • the first and second host compounds of the present invention may be co-evaporated or mixture-evaporated.
  • a thin film can be formed by dissolving or diffusing materials forming each layer into any suitable solvent such as ethanol, chloroform, tetrahydrofuran, dioxane, etc.
  • the solvent can be any solvent where the materials forming each layer can be dissolved or diffused, and where there are no problems in film-formation capability.
  • a co-evaporation indicates a process for two or more materials to be deposited as a mixture, by introducing each of the two or more materials into respective crucible cells, and applying an electric current to the cells for each of the materials to be evaporated.
  • a mixture-evaporation indicates a process for two or more materials to be deposited as a mixture, by mixing the two or more materials in one crucible cell before the deposition, and applying an electric current to the cell for the mixture to be evaporated.
  • a display system or a lighting system can be produced.
  • An OLED device was produced using the organic electroluminescent compound according to the present invention.
  • a transparent electrode indium tin oxide (ITO) thin film (10 ⁇ /sq) on a glass substrate for an organic light-emitting diode (OLED) device (Geomatec) was subjected to an ultrasonic washing with acetone, ethanol, and distilled water, sequentially, and then was stored in isopropanol.
  • the ITO substrate was then mounted on a substrate holder of a vacuum vapor depositing apparatus.
  • HI-1 was introduced into a cell of said vacuum vapor depositing apparatus, and then the pressure in the chamber of said apparatus was controlled to 10 -6 torr.
  • HI-2 was introduced into another cell of said vacuum vapor depositing apparatus, and was evaporated by applying an electric current to the cell, thereby forming a second hole injection layer having a thickness of 5 nm on the first hole injection layer.
  • HT-1 was then introduced into another cell of said vacuum vapor depositing apparatus, and was evaporated by applying an electric current to the cell, thereby forming a first hole transport layer having a thickness of 10 nm on the second hole injection layer.
  • HT-2 or HT-3 was then introduced into another cell of said vacuum vapor depositing apparatus, and was evaporated by applying an electric current to the cell, thereby forming a second hole transport layer having a thickness of 60 nm on the first hole transport layer.
  • a host material a first host compound and a second host compound listed in Table 1 were introduced into two cells of the vacuum vapor depositing apparatus, respectively.
  • Compound D-96 was introduced into another cell.
  • the two host materials were evaporated at 1:1 rate, while the dopant was evaporated at a different rate from the host materials, so that the dopant was deposited in a doping amount of 3 wt% based on the total amount of the host and dopant to form a light-emitting layer having a thickness of 40 nm on the second hole transport layer.
  • ET-1 and EI-1 were then introduced into two cells of the vacuum vapor depositing apparatus, respectively, and evaporated at 1:1 rate to form an electron transport layer having a thickness of 30 nm on the light-emitting layer.
  • an Al cathode having a thickness of 80 nm was deposited by another vacuum vapor deposition apparatus.
  • an OLED device was produced.
  • OLED device was produced in the same manner as in Device Examples 1-1 to 1-11, except for using only the second host compound listed in Table 1 as a host of the light-emitting layer.
  • An OLED device was produced in the same manner as in Device Examples 1-1 to 1-11, except for using only the first host compound listed in Table 1 as a host of the light-emitting layer.
  • Table 1 shows the evaluation results of the organic electroluminescent devices produced as in Device Examples 1-1 to 1-11, Comparative Examples 1-1 to 1-5, and Comparative Examples 2-1 and 2-2.
  • the organic electroluminescent device of the present invention Compared to conventional devices using a single host, the organic electroluminescent device of the present invention provides long lifespan while maintaining high luminous efficiency by using plural host compounds.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

L'invention concerne une pluralité de matériaux hôtes et un dispositif électroluminescent organique comprenant ces matériaux. Par le fait qu'il comprend une combinaison spécifique d'une pluralité de composés hôtes, le dispositif électroluminescent organique selon la présente invention présente d'excellentes caractéristiques de durée de vie tout en conservant une efficacité lumineuse élevée.
PCT/KR2015/008727 2014-08-20 2015-08-20 Pluralité de matériaux hôtes et dispositif électroluminescent organique comprenant ces matériaux WO2016028110A1 (fr)

Priority Applications (5)

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US15/503,742 US10069086B2 (en) 2014-08-20 2015-08-20 Plurality of host materials and an organic electroluminescence device comprising the same
CN202310013122.3A CN116056544A (zh) 2014-08-20 2015-08-20 多种主体材料和包含所述主体材料的有机电致发光器件
CN201580043992.9A CN106604911A (zh) 2014-08-20 2015-08-20 多种主体材料和包含所述主体材料的有机电致发光器件
JP2017506861A JP6700251B2 (ja) 2014-08-20 2015-08-20 複数のホスト材料及びそれを含む有機電界発光デバイス
EP15833468.0A EP3183234B1 (fr) 2014-08-20 2015-08-20 Pluralité de matériaux hôtes et dispositif électroluminescent organique comprenant ces matériaux

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KR1020150116757A KR102445503B1 (ko) 2014-08-20 2015-08-19 복수종의 호스트 재료 및 이를 포함하는 유기 전계 발광 소자

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US9530971B1 (en) * 2015-08-28 2016-12-27 Duk San Neolux Co., Ltd. Compound for organic electric element, organic electric element comprising the same and electronic device thereof
JP2019512887A (ja) * 2016-11-29 2019-05-16 エルジー・ケム・リミテッド 有機発光素子
CN110462866A (zh) * 2017-04-03 2019-11-15 罗门哈斯电子材料韩国有限公司 有机电致发光装置
KR20200007195A (ko) * 2018-07-12 2020-01-22 엘티소재주식회사 헤테로고리 화합물 및 이를 포함하는 유기 발광 소자
JP2020526026A (ja) * 2017-07-05 2020-08-27 メルク パテント ゲーエムベーハー 有機電子デバイスのための組成物

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9530971B1 (en) * 2015-08-28 2016-12-27 Duk San Neolux Co., Ltd. Compound for organic electric element, organic electric element comprising the same and electronic device thereof
JP2019512887A (ja) * 2016-11-29 2019-05-16 エルジー・ケム・リミテッド 有機発光素子
CN110462866A (zh) * 2017-04-03 2019-11-15 罗门哈斯电子材料韩国有限公司 有机电致发光装置
JP2020516064A (ja) * 2017-04-03 2020-05-28 ローム・アンド・ハース・エレクトロニック・マテリアルズ・コリア・リミテッド 有機エレクトロルミネセントデバイス
JP2020526026A (ja) * 2017-07-05 2020-08-27 メルク パテント ゲーエムベーハー 有機電子デバイスのための組成物
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KR20200007195A (ko) * 2018-07-12 2020-01-22 엘티소재주식회사 헤테로고리 화합물 및 이를 포함하는 유기 발광 소자
KR102169327B1 (ko) 2018-07-12 2020-10-23 엘티소재주식회사 헤테로고리 화합물 및 이를 포함하는 유기 발광 소자

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