WO2020054977A1 - Pluralité de matériaux hôtes et dispositif électroluminescent organique les comprenant - Google Patents

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

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Publication number
WO2020054977A1
WO2020054977A1 PCT/KR2019/009860 KR2019009860W WO2020054977A1 WO 2020054977 A1 WO2020054977 A1 WO 2020054977A1 KR 2019009860 W KR2019009860 W KR 2019009860W WO 2020054977 A1 WO2020054977 A1 WO 2020054977A1
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Prior art keywords
substituted
unsubstituted
alkyl
membered
arylsilyl
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PCT/KR2019/009860
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English (en)
Inventor
Bitnari Kim
Su-Hyun Lee
Hong-Se OH
So-Young Jung
Sang-Hee Cho
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DuPont Specialty Materials Korea Ltd
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Rohm and Haas Electronic Materials Korea Ltd
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Priority claimed from KR1020190082470A external-priority patent/KR102828052B1/ko
Application filed by Rohm and Haas Electronic Materials Korea Ltd filed Critical Rohm and Haas Electronic Materials Korea Ltd
Priority to DE112019003812.5T priority Critical patent/DE112019003812T5/de
Priority to US17/274,758 priority patent/US20220052271A1/en
Priority to CN201980059485.2A priority patent/CN112689911B/zh
Priority to JP2021513235A priority patent/JP7394121B2/ja
Publication of WO2020054977A1 publication Critical patent/WO2020054977A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C07D209/56—Ring systems containing three or more rings
    • C07D209/80—[b, c]- or [b, d]-condensed
    • C07D209/82—Carbazoles; Hydrogenated carbazoles
    • C07D209/86—Carbazoles; Hydrogenated carbazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
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    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
    • C07D213/16—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom containing only one pyridine ring
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    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
    • C07D213/22—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom containing two or more pyridine rings directly linked together, e.g. bipyridyl
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    • C07D215/06—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to the ring carbon atoms having only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, attached to the ring nitrogen atom
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    • C07D239/26—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
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    • C07D239/72—Quinazolines; Hydrogenated quinazolines
    • C07D239/74—Quinazolines; Hydrogenated quinazolines with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, attached to ring carbon atoms of the hetero ring
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    • C07D241/36—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems
    • C07D241/38—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems with only hydrogen or carbon atoms directly attached to the ring nitrogen atoms
    • C07D241/40—Benzopyrazines
    • C07D241/42—Benzopyrazines with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the hetero ring
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    • C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
    • C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
    • C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
    • C07D251/14—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with hydrogen or carbon atoms directly attached to at least one ring carbon atom
    • C07D251/24—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with hydrogen or carbon atoms directly attached to at least one ring carbon atom to three ring carbon atoms
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    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
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    • C07D401/10—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a carbon chain containing aromatic rings
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    • C07D403/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
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    • C07D405/04—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
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    • C07D405/12—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links
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    • C07D491/04—Ortho-condensed systems
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    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
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    • H10K85/342—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising iridium

Definitions

  • the present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same.
  • the first organic electroluminescent device was developed by Eastman Kodak in 1987, by using small aromatic diamine molecules and aluminum complexes as materials for forming a light-emitting layer [Appl. Phys. Lett. 51, 913, 1987].
  • OLED organic electroluminescent device
  • a light-emitting material is classified into a host material and a dopant material in a functional aspect and can be used as a combination of a host and a dopant to improve color purity, luminous efficiency, and stability.
  • a device having EL (electroluminescent) excellent characteristics has a structure comprising a light-emitting layer formed by doping a dopant to a host.
  • EL electroluminescent
  • KR 2015-0117173 A and KR 2015-0042603 A disclose a composition used for an organic electroluminescent device comprising a plurality of host compounds and an organic electroluminescent device; however, it is still necessary to be improved in terms of driving voltage, luminous efficiency, and lifespan.
  • the object of the present disclosure is firstly, to provide a plurality of host materials which is able to produce an organic electroluminescent device having low driving voltage and/or high luminous efficiency, and/or long lifespan, and secondly, to provide an organic electroluminescent device comprising the host materials.
  • the present inventors found that the aforementioned objective can be achieved by a plurality of host materials comprising at least one first host compound represented by the following formula 1 and at least one second host compound represented by the following formula 2, so that the present invention was completed.
  • L 1 to L 3 each independently represent a single bond, a substituted or unsubstituted (C1-C30)alkylene, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, or a substituted or unsubstituted (C3-C30)cycloalkylene; and
  • Ar 1 to Ar 3 each independently represent hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)aryl
  • HAr represents a substituted or unsubstituted nitrogen-containing (3- to 10-membered)heteroaryl
  • L represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;
  • Ar represents a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
  • a’ represents an integer of 1 to 3, when a’ is 2 or more, each of (L-Ar) may be the same or different.
  • an organic electroluminescent device having low driving voltage and/or high luminous efficiency and/or long lifespan can be prepared.
  • the present disclosure relates to a plurality of host materials comprising at least one first host compound represented by the above formula 1 and at least one second host compound represented by the above formula 2, and an organic electroluminescent device comprising the host materials.
  • organic electroluminescent material means a material that may be used in an organic electroluminescent device, and may comprise at least one compound.
  • the organic electroluminescent material may be comprised in any layer constituting an organic electroluminescent device, as necessary.
  • the organic electroluminescent material may be a hole injection material, a hole transport material, a hole auxiliary material, a light-emitting auxiliary material, an electron blocking material, a light-emitting material (containing host and dopant materials), an electron buffer material, a hole blocking material, an electron transport material, or an electron injection material, etc.
  • a plurality of host materials means a host material comprising a combination of at least two compounds, which may be comprised in any light-emitting layer constituting an organic electroluminescent device. It may mean both a material before being comprised in an organic electroluminescent device (e.g., before vapor deposition) and a material after being comprised in an organic electroluminescent device (e.g., after vapor deposition).
  • a plurality of host materials of the present disclosure may be a combination of at least two host materials, and selectively, conventional materials comprised in organic electroluminescent materials may be additionally comprised.
  • the at least two compounds comprised in the plurality of host materials of the present disclosure may be comprised together in one light-emitting layer, or may each be comprised in separate light-emitting layers by a method known in the field.
  • the at least two compounds may be mixture-evaporated or co-evaporated, or may be individually evaporated.
  • (C1-C30)alkyl(ene) is meant to be a linear or branched alkyl having 1 to 30 carbon atoms constituting the chain, in which the number of carbon atoms is preferably 1 to 20, and more preferably 1 to 10.
  • the above alkyl may include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert -butyl, etc.
  • “(C3-C30)cycloalkyl(ene)” is a mono- or polycyclic hydrocarbon having 3 to 30 ring backbone carbon atoms, in which the number of carbon atoms is preferably 3 to 20, and more preferably 3 to 7.
  • cycloalkyl may include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, etc.
  • (C6-C30)aryl(ene) is a monocyclic or fused ring radical derived from an aromatic hydrocarbon having 6 to 30 ring backbone carbon atoms, in which the number of the ring backbone carbon atoms is preferably 6 to 20, more preferably 6 to 15, may be partially saturated, and may comprise a spiro structure.
  • aryl specifically include phenyl, biphenyl, terphenyl, quaterphenyl, naphthyl, binaphthyl, phenylnaphthyl, naphthylphenyl, fluorenyl, phenylfluorenyl, dimethylfluorenyl, diphenylfluorenyl, benzofluorenyl, diphenylbenzofluorenyl, dibenzofluorenyl, phenanthrenyl, benzophenanthrenyl, phenylphenanthrenyl, anthracenyl, benzanthracenyl, indenyl, triphenylenyl, pyrenyl, tetracenyl, perylenyl, chrysenyl, benzochrysenyl, naphthacenyl, fluoranthenyl, benzofluoranthenyl, tolyl, xylyl, me
  • the aryl may be o-tolyl, m-tolyl, p-tolyl, 2,3-xylyl, 3,4-xylyl, 2,5-xylyl, mesityl, o-cumenyl, m-cumenyl, p-cumenyl, p-t-butylphenyl, p-(2-phenylpropyl)phenyl, 4'-methylbiphenyl, 4"-t-butyl-p-terphenyl-4-yl, o-biphenyl, m-biphenyl, p-biphenyl, o-terphenyl, m-terphenyl-4-yl, m-terphenyl-3-yl, m-terphenyl-2-yl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-terphenyl-2-yl, p-terphenyl-4-
  • (3- to 30-membered)heteroaryl(ene) is an aryl having 3 to 30 ring backbone atoms, in which the number of ring backbone atoms is preferably 5 to 25, including at least one, preferably 1 to 4 heteroatoms selected from the group consisting of B, N, O, S, Si, P, and Ge.
  • the above heteroatom may be linked with at least one substituent selected from the group consisting of hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (5- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstit
  • the above heteroaryl may be one formed by linking at least one heteroaryl or aryl group to a heteroaryl group via a single bond(s); and may comprise a spiro structure.
  • the heteroaryl specifically may include a monocyclic ring-type heteroaryl including furyl, thiophenyl, pyrrolyl, imidazolyl, pyrazolyl, thiazolyl, thiadiazolyl, isothiazolyl, isoxazolyl, oxazolyl, oxadiazolyl, triazinyl, tetrazinyl, triazolyl, tetrazolyl, furazanyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, etc., and a fused ring-type heteroaryl including benzofuranyl, benzothiophenyl, isobenzofuranyl, dibenzofuranyl, dibenzothioph
  • the heteroaryl may be 1-pyrrolyl, 2-pyrrolyl, 3-pyrrolyl, 2-pyridinyl, 3-pyridinyl, 4-pyridinyl, 2-pyrimidinyl, 4-pyrimidinyl, 5-pyrimidinyl, 6-pyrimidinyl, 1,2,3-triazin-4-yl, 1,2,4-triazin-3-yl, 1,3,5-triazin-2-yl, 1-imidazolyl, 2-imidazolyl, 1-pyrazolyl, 1-indolizidinyl, 2-indolizidinyl, 3-indolizidinyl, 5-indolizidinyl, 6-indolizidinyl, 7-indolizidinyl, 8-indolizidinyl, 2-imidazopyridinyl, 3-imidazopyridinyl, 5-imidazopyridinyl, 6-imidazopyridinyl, 7-imidazopyridinyl, 8-imidazopyridiny
  • Ortho position is a compound with substituents, which are adjacent to each other, e.g., at the 1 and 2 positions on benzene.
  • Meta position is the next substitution position of the immediately adjacent substitution position, e.g., a compound with substituents at the 1 and 3 positions on benzene.
  • Para position is the next substitution position of the meta position, e.g., a compound with substituents at the 1 and 4 positions on benzene.
  • a substituted or unsubstituted ring formed in linking to an adjacent substituent means a substituted or unsubstituted (3- to 30-membered) mono- or polycyclic, alicyclic, aromatic ring, or a combination thereof, formed by linking or fusing two or more adjacent substituents; preferably, may be a substituted or unsubstituted (3- to 26-membered) mono- or polycyclic, alicyclic, aromatic ring, or a combination thereof.
  • at least one of the carbon atoms in the formed ring may be replaced with at least one heteroatom selected from the group consisting of B, N, O, S, Si, and P, preferably, N, O, and S.
  • the number of ring backbone atoms is (5- to 20-membered), and according to another embodiment the present disclosure, the number of ring backbone atoms is (5- to 15-membered).
  • substituted in the expression “substituted or unsubstituted” means that a hydrogen atom in a certain functional group is replaced with another atom or functional group, i.e., a substituent.
  • Host materials according to one embodiment comprise at least one first host compound represented by the above formula 1 and at least one second host compound represented by the above formula 2; and the host materials may be contained in the light-emitting layer of an organic electroluminescent device according to one embodiment.
  • the first host compound as the host material according to one embodiment may be represented by the following formula 1.
  • L 1 to L 3 each independently represent a single bond, a substituted or unsubstituted (C1-C30)alkylene, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, or a substituted or unsubstituted (C3-C30)cycloalkylene; and
  • Ar 1 to Ar 3 each independently represent hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)aryl
  • L 1 to L 3 each independently may be a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene, preferably, a single bond, a substituted or unsubstituted (C6-C25)arylene, or a substituted or unsubstituted (5- to 25-membered)heteroarylene, more preferably, a single bond or a substituted or unsubstituted (C6-C18)arylene.
  • L 1 to L 3 each independently may be a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted o-biphenylene, a substituted or unsubstituted m-biphenylene, a substituted or unsubstituted p-biphenylene, a substituted or unsubstituted naphthylene, or a substituted or unsubstituted fluorenylene.
  • Ar 1 to Ar 3 each independently may be hydrogen, deuterium, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl, preferably, a substituted or unsubstituted (C6-C25)aryl or a substituted or unsubstituted (5- to 30-membered)heteroaryl, more preferably, a substituted or unsubstituted (C6-C20)aryl or a substituted or unsubstituted (5- to 25-membered)heteroaryl.
  • Ar 1 to Ar 3 each independently may be a substituted or unsubstituted phenyl, a substituted or unsubstituted o-biphenyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted m-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 dibenzothiophenyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted benzocarbazolyl, a substituted substituted
  • the compound represented by the formula 1 may be represented by any one of the following formulae 1-1 to 1-6.
  • Y represents CR 6 R 7 , NR 8 , O, or S;
  • R 1 to R 8 each independently represent hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)aryl
  • L 4 represents a single bond, a substituted or unsubstituted (C1-C30)alkylene, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, or a substituted or unsubstituted (C3-C30)cycloalkylene;
  • Ar 4 represents hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, or a substituted or unsubstituted (C3-C30)cycloalkyl;
  • each of R 1 to R 5 may be the same or different;
  • Ar 2 , Ar 3 , and L 1 to L 3 are as defined in formula 1.
  • Y may be NR 8 , O, or S.
  • R 1 to R 5 each independently may be hydrogen, deuterium, halogen, cyano, or may be linked to adjacent substituents to form a ring, preferably, hydrogen, deuterium, or may be linked to adjacent substituents to form a substituted or unsubstituted (3- to 18-membered) mono- or polycyclic ring, more preferably, hydrogen or may be linked to adjacent substituents to form an unsubstituted (3- to 10-membered) mono- or polycyclic aromatic ring.
  • adjacent R 1 or adjacent R 2 may be linked to each other to form a benzene ring.
  • R 6 to R 8 each independently may be hydrogen, deuterium, halogen, cyano, or a substituted or unsubstituted (C6-C30)aryl, preferably, a substituted or unsubstituted (C6-C25)aryl, more preferably, a substituted or unsubstituted (C6-C18)aryl.
  • R 6 to R 8 each independently may be a substituted or unsubstituted phenyl or a substituted or unsubstituted biphenyl.
  • L 4 may be a single bond or a substituted or unsubstituted (C6-C30)arylene, preferably, a single bond or a substituted or unsubstituted (C6-C25)arylene, more preferably, a single bond or a substituted or unsubstituted (C6-C18)arylene.
  • L 4 may be a single bond or a substituted or unsubstituted phenylene.
  • Ar 4 may be hydrogen, deuterium, or a substituted or unsubstituted (C6-C30)aryl, preferably, a substituted or unsubstituted (C6-C25)aryl, more preferably, a substituted or unsubstituted (C6-C18)aryl.
  • Ar 4 may be a substituted or unsubstituted phenyl, a substituted or unsubstituted o-biphenyl, a substituted or unsubstituted m-biphenyl, or a substituted or unsubstituted p-biphenyl.
  • the first host compound represented by formula 1 may be illustrated by the following compounds, but is not limited thereto.
  • the compound of formula 1 according to the present disclosure may be produced by a synthetic method known to a person skilled in the art, for example, may be synthesized by the methods disclosed in KR 2013-0106255 A (2013.9.27.), KR 2012-0042633 A (2012.5.3.), and KR 2015-0066202 A (2015.6.16.), but are not limited thereto.
  • the second host compound as another host material may be represented by the following formula 2.
  • HAr represents a substituted or unsubstituted nitrogen-containing (3- to 10-membered)heteroaryl
  • L represents a single bond, a substituted or unsubstituted (C6-C30)arylene, or a substituted or unsubstituted (3- to 30-membered)heteroarylene;
  • Ar represents a substituted or unsubstituted (C6-C30)aryl or a substituted or unsubstituted (3- to 30-membered)heteroaryl;
  • a’ represents an integer of 1 to 3, when a’ is 2 or more, each of (L-Ar) may be the same or different.
  • HAr may be a substituted or unsubstituted nitrogen-containing (5- to 10-membered)heteroaryl, preferably, an unsubstituted nitrogen-containing (6- to 10-membered)heteroaryl.
  • HAr may be pyridinyl, pyrimidinyl, triazinyl, quinolinyl, quinoxalinyl, or quinazolinyl.
  • L may be a single bond, a substituted or unsubstituted (C6-C25)arylene, or a substituted or unsubstituted (5- to 25-membered)heteroarylene, preferably, a single bond, an unsubstituted (C6-C20)arylene, or a substituted or unsubstituted (5- to 18-membered)heteroarylene.
  • L may be a single bond, naphthyl-substituted or unsubstituted phenylene, a substituted or unsubstituted m-biphenylene, a substituted or unsubstituted p-biphenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted fluorenylene, or a substituted or unsubstituted pyridinylene.
  • Ar may be a substituted or unsubstituted (C6-C25)aryl or a substituted or unsubstituted (5- to 25-membered)heteroaryl, preferably, (C6-C18)aryl or a substituted or unsubstituted (5- to 18-membered)heteroaryl.
  • Ar may be a naphthyl- or fluorenyl-substituted or unsubstituted phenyl, a substituted or unsubstituted m-biphenyl, a substituted or unsubstituted p-biphenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted m-terphenyl, a substituted or unsubstituted p-terphenyl, a substituted or unsubstituted triphenylenyl, a substituted or unsubstituted phenanthrenyl, at least one phenyl- or at least one methyl-substituted fluorenyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted dibenzofuranyl, phenyl-substituted or unsubstituted carbazolyl
  • a’ may be an integer of 2 or 3, wherein each of (L-Ar) may be the same or different.
  • the compound represented by the formula 2 may be represented by the following formula 2-1 or 2-2.
  • X 1 to X 6 and Z 1 to Z 4 each independently represent CR a or N, wherein at least one of X 1 to X 6 is N, and at least one of Z 1 to Z 4 is N;
  • R a represents each independently represent hydrogen, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, or a substituted or unsubstituted (C6-C30)aryl;
  • At least one of X 1 to X 6 is N, preferably, at least two of X 1 to X 6 may be N, more preferably, at least three of X 1 to X 6 may be N.
  • the compound represented by the formula 2-1 may be (L-Ar) a’ -substituted, pyridine, pyrimidine, or triazine.
  • At least one of Z 1 to Z 4 is N, preferably, at least two of Z 1 to Z 4 may be N.
  • the compound represented by the formula 2-2 may be (L-Ar) a’ -substituted, quinoline, quinoxaline, or quinazoline.
  • R a may be all hydrogen.
  • the second host compound represented by formula 2 may be more specifically illustrated by the following compounds, but is not limited thereto.
  • the compound of formula 2 according to the present disclosure may be produced by a synthetic method known to a person skilled in the art, for example, the compound represented by formula 2-1 or 2-2 may be synthesized by referring to the following reaction scheme 1 or 2, but is not limited thereto:
  • the organic electroluminescent device includes a first electrode; a second electrode; and at least one organic layer interposed between the first electrode and the second electrode.
  • the organic layer may include a light-emitting layer, and the light-emitting layer may comprise host materials comprising at least one first host compound represented by formula 1 and at least one second host compound represented by formula 2.
  • the first host compound represented by formula 1 and the second host compound represented by formula 2 may be included in the same organic layer or may be included in the different organic layers, respectively.
  • 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.
  • the doping concentration of the dopant compound based on the host compound may be less than 20 wt%, preferably, 17 wt%.
  • One of the first electrode and the second electrode may be an anode and the other may be a cathode; wherein, the first electrode and the second electrode may each be formed as a transmissive conductive material, a transflective conductive material, or a reflective conductive material.
  • the organic electroluminescent device may be a top emission type, a bottom emission type, or a both-sides emission type according to the kinds of the material forming the first electrode and the second electrode.
  • the organic layer may comprise a light-emitting layer, and may further comprise at least one layer selected from a hole injection layer, a hole transport layer, a hole auxiliary layer, a light-emitting auxiliary layer, an electron transport layer, an electron injection layer, an interlayer, a hole blocking layer, an electron blocking layer, and an electron buffer layer.
  • the organic layer may further comprise an amine-based compound and/or an azine-based compound other than the light-emitting material of the present disclosure.
  • the hole injection layer, the hole transport layer, the hole auxiliary layer, the light-emitting layer, the light-emitting auxiliary layer, or the electron blocking layer may contain the amine-based compound, e.g., an arylamine-based compound and a styrylarylamine-based compound, etc., as a hole injection material, a hole transport material, a hole auxiliary material, a light-emitting material, a light-emitting auxiliary material, or an electron blocking material.
  • the electron transport layer, the electron injection layer, the electron buffer layer, or the hole blocking layer may contain the azine-based compound as an electron transport material, an electron injection material, an electron buffer material, or a hole blocking material.
  • 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 the d-transition elements of the Periodic Table, or at least one complex compound comprising such a metal.
  • An organic electroluminescent material may be used as light-emitting materials for a white organic light-emitting device.
  • the white organic light-emitting device has suggested various structures such as a parallel side-by-side arrangement method, a stacking arrangement method, or CCM (color conversion material) method, etc., according to the arrangement of R (Red), G (Green), B (blue), or YG (yellowish green) light-emitting units.
  • the organic electroluminescent material according to one embodiment may also be applied to the organic electroluminescent device comprising a QD (quantum dot).
  • a hole injection layer, a hole transport layer, an electron blocking layer, or a combination thereof can be used between the anode and the light-emitting layer.
  • the hole injection layer may be multi-layers 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, wherein each of the multi-layers may use two compounds simultaneously.
  • the hole injection layer may be doped as a p-dopant.
  • the electron blocking layer may be placed between the hole transport layer (or hole injection layer) and the light-emitting layer, and can confine the excitons within the light-emitting layer by blocking the overflow of electrons from the light-emitting layer to prevent a light-emitting leakage.
  • the hole transport layer or the electron blocking layer may be multi-layers, and wherein each layer may use a plurality of compounds.
  • An electron buffer layer, a hole blocking layer, an electron transport layer, an electron injection layer, or a combination thereof can be used between the light-emitting layer and the cathode.
  • the electron buffer layer may be multi-layers in order to control the injection of the electron and improve the interfacial properties between the light-emitting layer and the electron injection layer, wherein each of the multi-layers may use two compounds simultaneously.
  • the hole blocking layer or the electron transport layer may also be multi-layers, wherein each layer may use a plurality of compounds.
  • the electron injection layer may be doped as an n-dopant.
  • the light-emitting auxiliary layer may be placed between the anode and the light-emitting layer, or between the cathode and the light-emitting layer.
  • the light-emitting auxiliary layer When the light-emitting auxiliary layer is placed between the anode and the light-emitting layer, it can be used for promoting the hole injection and/or the hole transport, or for preventing the overflow of electrons.
  • the light-emitting auxiliary layer is placed between the cathode and the light-emitting layer, it can be used for promoting the electron injection and/or the electron transport, or for preventing the overflow of holes.
  • the hole auxiliary layer may be placed between the hole transport layer (or hole injection layer) and the light-emitting layer, and may be effective to promote or block the hole transport rate (or the hole injection rate), thereby enabling the charge balance to be controlled.
  • the hole transport layer which is further included, may be used as the hole auxiliary layer or the electron blocking layer.
  • the light-emitting auxiliary layer, the hole auxiliary layer, or the electron blocking layer may have an effect of improving the efficiency and/or the lifespan of the organic electroluminescent device.
  • a surface layer selected from a chalcogenide layer, a halogenated metal layer, and a metal oxide layer
  • a surface layer selected from a chalcogenide layer, a halogenated metal layer, and a metal oxide layer
  • a chalcogenide (including oxides) layer of silicon and aluminum is preferably placed on an anode surface of an electroluminescent medium layer
  • a halogenated metal layer or a metal oxide layer is preferably placed on a cathode surface of an electroluminescent medium layer.
  • the operation stability for the organic electroluminescent device may be obtained by the surface layer.
  • the chalcogenide includes SiO X (1 ⁇ X ⁇ 2), AlO X (1 ⁇ X ⁇ 1.5), SiON, SiAlON, etc.;
  • the halogenated metal includes LiF, MgF 2 , CaF 2 , a rare earth metal fluoride, etc.; and the metal oxide includes Cs 2 O, Li 2 O, MgO, SrO, BaO, CaO, etc.
  • 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 may be 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
  • 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 organic electroluminescent device having two or more light-emitting layers and emitting white light.
  • An organic electroluminescent device may further comprise at least one dopant in the light-emitting layer.
  • the dopant comprised in the organic electroluminescent material of the present disclosure may be at least one phosphorescent or fluorescent dopant, preferably a phosphorescent dopant.
  • the phosphorescent dopant material applied to the organic electroluminescent device of the present disclosure is not particulary limited, but may be preferably a metallated complex compound(s) of a metal atom(s) selected from iridium (Ir), osmium (Os), copper (Cu), and platinum (Pt), more preferably an ortho-metallated complex compound(s) of a metal atom(s) selected from iridium (Ir), osmium (Os), copper (Cu), and platinum (Pt), and even more preferably ortho-metallated iridium complex compound(s).
  • the dopant comprised in the organic electroluminescent device may use the compound represented by the following formula 101, but is not limited thereto:
  • L is selected from the following structure 1 or 2:
  • R 100 to R 103 each independently represent hydrogen, deuterium, halogen, halogen-substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C30)aryl, cyano, a substituted or unsubstituted (3- to 30-membered)heteroaryl, or a substituted or unsubstituted (C1-C30)alkoxy; or may be linked to an adjacent substituent(s) to form a substituted or unsubstituted fused ring, e.g., a substituted or unsubstituted quinoline, a substituted or unsubstituted benzofuropyridine, a substituted or unsubstituted benzothienopyridine, a substituted or unsubstituted indenopyridine, a substituted or un
  • R 104 to R 107 each independently represent hydrogen, deuterium, halogen, halogen-substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, cyano, or a substituted or unsubstituted (C1-C30)alkoxy; or may be linked to an adjacent substituent(s) to form a substituted or unsubstituted fused ring, e.g., a substituted or unsubstituted naphthyl, a substituted or unsubstituted fluorene, a substituted or unsubstituted dibenzothiophene, a substituted or unsubstituted dibenzofuran, a substituted or
  • R 201 to R 211 each independently represent hydrogen, deuterium, halogen, halogen-substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, or a substituted or unsubstituted (C6-C30)aryl; or may be linked to an adjacent substituent(s) to form a substituted or unsubstituted fused ring; and
  • s represents an integer of 1 to 3.
  • the specific examples of the dopant compound include the following, but are not limited thereto.
  • dry film-forming methods such as vacuum evaporation, sputtering, plasma, ion plating methods, etc., or wet film-forming methods such as ink jet printing, nozzle printing, slot coating, spin coating, dip coating, flow coating methods, etc.
  • wet film-forming methods such as ink jet printing, nozzle printing, slot coating, spin coating, dip coating, flow coating methods, etc.
  • a thin film may be formed by dissolving or diffusing materials forming each layer into any suitable solvent such as ethanol, chloroform, tetrahydrofuran, dioxane, etc.
  • the solvent may be any solvent where the materials forming each layer can be dissolved or diffused, and where there are no problems in film-formation capability.
  • the above methods may be used, preferably, co-evaporation or mixture-evaporation may be used.
  • the co-deposition is a mixed deposition method in which two or more isomer materials are put into respective individual crucible sources and a current is applied to both cells simultaneously to evaporate the materials and to perform mixed deposition; and the mixed deposition is a mixed deposition method in which two or more isomer materials are mixed in one crucible source before deposition, and then a current is applied to one cell to evaporate the materials.
  • first host compound and the second host compound according to one embodiment are present in the same layer or another layer in the organic electroluminescent device, two host compounds may be individually deposited. For example, the first host compound is deposited, thereafter the second host compound may be deposited.
  • the present disclosure can provide display devices such as smartphones, tablets, notebooks, PCs, TVs, or display devices for vehicles, or lighting devices such as outdoor or indoor lighting, by using a plurality of host materials comprising the compound represented by the formula 1 and the compound represented by the formula 2.
  • OLEDs comprising the compound of the present disclosure were produced.
  • a transparent electrode indium tin oxide (ITO) thin film (10 ⁇ /sq) on a glass substrate for an OLED device (GEOMATEC CO., LTD., Japan) was subject to an ultrasonic washing with acetone, trichloroethylene, 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 deposition apparatus.
  • Compound HI-1 was introduced into a cell of the vacuum vapor deposition apparatus, and then the pressure in the chamber of the apparatus was controlled to 10 -6 torr.
  • compound HI-2 was introduced into another cell of the vacuum vapor deposition 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.
  • Compound HT-1 was then introduced into another cell of the vacuum vapor deposition 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.
  • Compound HT-2 was then introduced into another cell of the vacuum vapor deposition 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 light-emitting layer was formed thereon as follows: The first host compound and the second host compound of the following Table 1 were introduced into one cell of the vacuum vapor depositing apparatus as a host, and compound D-39 was introduced into another cell as a dopant.
  • the two host materials were evaporated at a rate of 1:1 and simultaneously, the dopant was deposited in a doping amount of 3 wt% to form a light-emitting layer having a thickness of 40 nm on the hole transport layer.
  • compounds ET-1 and EI-1 were evaporated at a rate of 1:1, and were deposited to form an electron transport layer having a thickness of 35 nm on the light-emitting layer.
  • an Al cathode having a thickness of 80 nm was deposited on the electron injection layer by another vacuum vapor deposition apparatus.
  • OLEDs were produced.
  • OLEDs were produced in the same manner as in Device Example 1-1, except that the compounds of the following Table 1 were used as the host of the light-emitting layer.
  • OLEDs were produced in the same manner as in Device Example 1-1, except that the compounds of the following Table 2 were used as the host of the light-emitting layer.
  • An OLED was produced in the same manner as in Device Example 1-1, except that the compounds of the following Table 2 were used as the host of the light-emitting layer.
  • the organic electroluminescent device comprising the specific combination compounds according to one embodiment as host materials can significantly lower the driving voltage and has improved characteristics in view of efficiency and lifespan than the conventional organic electroluminescent device.

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  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention concerne une pluralité de matériaux hôtes et un dispositif électroluminescent organique les comprenant. En intégrant les matériaux hôtes selon la présente invention, un dispositif électroluminescent organique ayant une faible tension de commande et/ou une efficacité élevée et/ou une longue durée de vie peut être obtenu.
PCT/KR2019/009860 2018-09-10 2019-08-07 Pluralité de matériaux hôtes et dispositif électroluminescent organique les comprenant Ceased WO2020054977A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE112019003812.5T DE112019003812T5 (de) 2018-09-10 2019-08-07 Mehrere wirtsmaterialien und diese umfassende organische elektrolumineszierende vorrichtung
US17/274,758 US20220052271A1 (en) 2018-09-10 2019-08-07 A plurality of host materials and organic electroluminescent device comprising the same
CN201980059485.2A CN112689911B (zh) 2018-09-10 2019-08-07 多种主体材料和包含其的有机电致发光装置
JP2021513235A JP7394121B2 (ja) 2018-09-10 2019-08-07 複数のホスト材料及びこれを含む有機エレクトロルミネセントデバイス

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KR10-2018-0107679 2018-09-10
KR20180107679 2018-09-10
KR10-2019-0082470 2019-07-09
KR1020190082470A KR102828052B1 (ko) 2018-09-10 2019-07-09 복수 종의 호스트 재료 및 이를 포함하는 유기 전계 발광 소자

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WO2020054977A1 true WO2020054977A1 (fr) 2020-03-19

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120235123A1 (en) * 2009-08-10 2012-09-20 Rohm And Haas Electronic Materials Korea Ltd. Novel organic electroluminescent compounds and organic electroluminescent device using the same
JP2017197478A (ja) * 2016-04-27 2017-11-02 東京応化工業株式会社 化合物及びその製造方法
KR20180094349A (ko) * 2017-02-15 2018-08-23 롬엔드하스전자재료코리아유한회사 유기 전계 발광 화합물 및 이를 포함하는 유기 전계 발광 소자
KR20180099547A (ko) * 2017-02-28 2018-09-05 롬엔드하스전자재료코리아유한회사 유기 전계 발광 소자
KR20190034074A (ko) * 2017-09-22 2019-04-01 롬엔드하스전자재료코리아유한회사 복수 종의 호스트 재료 및 이를 포함하는 유기 전계 발광 소자

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120235123A1 (en) * 2009-08-10 2012-09-20 Rohm And Haas Electronic Materials Korea Ltd. Novel organic electroluminescent compounds and organic electroluminescent device using the same
JP2017197478A (ja) * 2016-04-27 2017-11-02 東京応化工業株式会社 化合物及びその製造方法
KR20180094349A (ko) * 2017-02-15 2018-08-23 롬엔드하스전자재료코리아유한회사 유기 전계 발광 화합물 및 이를 포함하는 유기 전계 발광 소자
KR20180099547A (ko) * 2017-02-28 2018-09-05 롬엔드하스전자재료코리아유한회사 유기 전계 발광 소자
KR20190034074A (ko) * 2017-09-22 2019-04-01 롬엔드하스전자재료코리아유한회사 복수 종의 호스트 재료 및 이를 포함하는 유기 전계 발광 소자

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