WO2023219399A1 - 화합물, 이를 포함하는 코팅 조성물, 이를 이용한 유기 발광 소자 및 이의 제조방법 - Google Patents
화합물, 이를 포함하는 코팅 조성물, 이를 이용한 유기 발광 소자 및 이의 제조방법 Download PDFInfo
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- WO2023219399A1 WO2023219399A1 PCT/KR2023/006302 KR2023006302W WO2023219399A1 WO 2023219399 A1 WO2023219399 A1 WO 2023219399A1 KR 2023006302 W KR2023006302 W KR 2023006302W WO 2023219399 A1 WO2023219399 A1 WO 2023219399A1
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- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 1
- KWQNQSDKCINQQP-UHFFFAOYSA-K tri(quinolin-8-yloxy)gallane Chemical compound C1=CN=C2C(O[Ga](OC=3C4=NC=CC=C4C=CC=3)OC=3C4=NC=CC=C4C=CC=3)=CC=CC2=C1 KWQNQSDKCINQQP-UHFFFAOYSA-K 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 125000005580 triphenylene group Chemical group 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- HTPBWAPZAJWXKY-UHFFFAOYSA-L zinc;quinolin-8-olate Chemical compound [Zn+2].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 HTPBWAPZAJWXKY-UHFFFAOYSA-L 0.000 description 1
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- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D307/91—Dibenzofurans; Hydrogenated dibenzofurans
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- C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
- C07D333/50—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom condensed with carbocyclic rings or ring systems
- C07D333/76—Dibenzothiophenes
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- C07D407/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00
- C07D407/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings
- C07D407/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
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- C07D407/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having oxygen atoms as the only ring hetero atoms, not provided for by group C07D405/00 containing three or more hetero rings
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/60—Additives non-macromolecular
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H10K85/622—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing four rings, e.g. pyrene
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- H10K85/636—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
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Definitions
- This specification relates to a compound, a coating composition containing the compound, an organic light emitting device formed using the coating composition, and a method of manufacturing the same.
- the organic luminescence phenomenon is an example of an electric current being converted into visible light by an internal process of a specific organic molecule.
- the principle of organic luminescence phenomenon is as follows. When an organic layer is placed between an anode and a cathode and an electric current is applied between the two electrodes, electrons and holes are injected into the organic layer from the cathode and anode, respectively. Electrons and holes injected into the organic layer recombine to form excitons, and when these excitons fall back to the ground state, they emit light.
- Organic light-emitting devices using this principle can generally be composed of a cathode, an anode, and an organic material layer located between them, such as a hole injection layer, a hole transport layer, a light-emitting layer, an electron injection layer, and an electron transport layer.
- the purpose of this specification is to provide novel compounds and organic light-emitting devices containing them.
- An exemplary embodiment of the present specification provides a compound represented by the following formula (1).
- Cy1 to Cy4 are the same or different from each other and are each independently a substituted or unsubstituted hydrocarbon ring group,
- Y1 and Y2 are the same or different from each other and are each independently O, S, Se or NR,
- L is a substituted or unsubstituted divalent hydrocarbon ring group; Or a substituted or unsubstituted divalent heterocyclic group,
- L1 to L4 are the same or different from each other and are each independently directly bonded; Substituted or unsubstituted arylene group; Or a substituted or unsubstituted heteroarylene group,
- L10 and L11 are the same or different from each other and are each independently a substituted or unsubstituted arylene group
- X1 and X2 are the same or different from each other and are each independently a curable group
- R and R1 to R4 are the same or different from each other, and are each independently hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted alkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group,
- n1 and n2 are each integers from 0 to 4, and when n1 and n2 are each 2 or more, 2 or more substituents in parentheses are the same or different from each other,
- n1 and m2 are each integers from 1 to 5, n1+m1 is 5 or less, n2+m2 is 5 or less,
- n3 and n4 are each integers of 1 to 7, and when n3 and n4 are each 2 or more, 2 or more substituents in parentheses are the same or different from each other.
- Another embodiment of the present specification provides a coating composition containing the above compound.
- Another embodiment of the present specification includes a first electrode; second electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one layer of the organic material layer includes the above-described coating composition or a cured product thereof.
- Another embodiment of the present specification includes preparing a first electrode; Forming one or more organic layers on the first electrode; And forming a second electrode on the organic layer, wherein forming the organic layer includes forming one or more organic layers using the coating composition.
- forming the organic layer includes forming one or more organic layers using the coating composition.
- the compound according to an exemplary embodiment of the present specification has a heteroaryl group introduced near N, making it easy to control the energy level. Accordingly, when applied to an organic material layer, the interface characteristics with other layers are improved and hole movement is facilitated. . In addition, the compound has excellent hole mobility by containing a fluoro group (-F) at a specific position.
- the compound according to an exemplary embodiment of the present specification can be used as a material for the organic material layer of an organic light-emitting device, and when applied to an organic light-emitting device, a device having low driving voltage, excellent luminous efficiency, and/or long lifespan characteristics can be obtained.
- the compound according to an exemplary embodiment of the present specification has the advantage of forming a stable thin film that is not damaged in the next solution process by forming a completely cured thin film through heat treatment or light treatment.
- the compound according to an exemplary embodiment of the present specification exhibits resistance to a specific solvent after curing, so a solution process is possible when manufacturing the device, and thus a larger area of the device is possible.
- FIG. 1 is a diagram illustrating the structure of an organic light-emitting device according to an exemplary embodiment of the present specification.
- An exemplary embodiment of the present specification provides a compound of Formula 1 below.
- Cy1 to Cy4 are the same or different from each other and are each independently a substituted or unsubstituted hydrocarbon ring group,
- Y1 and Y2 are the same or different from each other and are each independently O, S, Se or NR,
- L is a substituted or unsubstituted divalent hydrocarbon ring group; Or a substituted or unsubstituted divalent heterocyclic group,
- L1 to L4 are the same or different from each other and are each independently directly bonded; Substituted or unsubstituted arylene group; Or a substituted or unsubstituted heteroarylene group,
- L10 and L11 are the same or different from each other and are each independently a substituted or unsubstituted arylene group
- X1 and X2 are the same or different from each other and are each independently a curable group
- R and R1 to R4 are the same or different from each other, and are each independently hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted alkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group,
- n1 and n2 are each integers from 0 to 4, and when n1 and n2 are each 2 or more, 2 or more substituents in parentheses are the same or different from each other,
- n1 and m2 are each integers from 1 to 5, n1+m1 is 5 or less, n2+m2 is 5 or less,
- n3 and n4 are each integers of 1 to 7, and when n3 and n4 are each 2 or more, 2 or more substituents in parentheses are the same or different from each other.
- the compound of Formula 1 has high stability and a high HOMO (highest occupied molecular orbital) energy level because the fluorenyl group includes at least one fluoro group (-F).
- the compound has a high HOMO (highest occupied molecular orbital) energy level value by introducing a heteroaryl group near N.
- the compound when the compound is introduced into the hole injection layer or hole transport layer in an organic light emitting device, the interface characteristics with adjacent layers are improved and hole movement is facilitated.
- the compound of Formula 1 when the compound of Formula 1 is included in the hole injection layer in an organic light emitting device, it has a major effect on improving the lifespan of the device by facilitating hole injection from the hole injection layer to the hole transport layer.
- the compound since the compound has excellent solubility, it has the advantage of being able to select a variety of solvents when manufacturing the coating composition.
- the compound has the advantage of forming a stable thin film that is not damaged in the next solution process by forming a completely cured thin film through heat treatment or light treatment.
- the compound exhibits resistance to specific solvents after curing, a solution process is possible when manufacturing the device, and thus a larger area of the device is possible.
- energy level means energy level. Therefore, the energy level is interpreted to mean the absolute value of the corresponding energy value. For example, a deeper energy level means that the absolute value increases in the minus direction from the vacuum level.
- curable group may refer to a reactive substituent that crosslinks compounds by exposing them to heat and/or light. Crosslinking may be created by heat treatment or light irradiation, where radicals generated when carbon-carbon multiple bonds or cyclic structures are decomposed are connected.
- C x1 -x2 means “carbon number x1 to x2.”
- an “adjacent” group may mean a substituent substituted on an atom directly connected to the atom on which the substituent is substituted, a substituent located closest to the substituent in terms of structure, or another substituent substituted on the atom on which the substituent is substituted. You can. For example, two substituents substituted at ortho positions in a benzene ring and two substituents substituted on the same carbon in an aliphatic ring can be interpreted as “adjacent” groups.
- ring refers to a substituted or unsubstituted hydrocarbon ring; Or it means a substituted or unsubstituted heterocycle.
- substitution means changing a hydrogen atom bonded to a carbon atom of a compound to another substituent, and the position to be substituted is not limited as long as it is the position where the hydrogen atom is substituted, that is, a position where the substituent can be substituted, When two or more substituents are substituted, the two or more substituents may be the same or different from each other.
- substituted or unsubstituted refers to deuterium; halogen group; Alkyl group; Cycloalkyl group; Alkoxy group; Aryloxy group; Amine group; Aryl group; It means that it is substituted with one or two or more substituents selected from the group consisting of heteroaryl groups, or is substituted with a substituent in which two or more of the above-exemplified substituents are linked, or does not have any substituents.
- a substituent group in which two or more substituents are connected may be a biphenyl group. That is, the biphenyl group may be an aryl group, or it may be interpreted as a substituent in which two phenyl groups are connected.
- halogen groups include fluorine (F), chlorine (Cl), bromine (Br), or iodine (I).
- the alkyl group may be straight chain or branched, and the number of carbon atoms is not particularly limited, but is preferably 1 to 60. According to one embodiment, the carbon number of the alkyl group is 1 to 30. Specific examples of the alkyl group include, but are not limited to, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, hexyl, heptyl, and octyl groups.
- an alkylene group refers to an alkyl group having two bonding positions, that is, a bivalent group.
- the description of the alkyl group described above can be applied except that these are divalent groups.
- the number of carbon atoms in the cycloalkyl group is not particularly limited, but is preferably 3 to 60. According to one embodiment, the carbon number of the cycloalkyl group is 3 to 30. Specific examples of the cycloalkyl group include, but are not limited to, cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, and cyclooctyl group.
- the alkoxy group may be straight chain, branched chain, or ring chain.
- the number of carbon atoms of the alkoxy group is not particularly limited, but is preferably 1 to 30 carbon atoms.
- Specific examples of the alkoxy group include methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, tert-butoxy, sec-butoxy, n-pentyloxy, neopentyloxy, iso It may be pentyloxy, n-hexyloxy, 3,3-dimethylbutyloxy, 2-ethylbutyloxy, n-octyloxy, n-nonyloxy, n-decyloxy, etc., but is not limited thereto.
- the aryl group is not particularly limited, but may have 6 to 60 carbon atoms and may be a monocyclic aryl group or a polycyclic aryl group. According to one embodiment, the aryl group has 6 to 30 carbon atoms. According to one embodiment, the aryl group has 6 to 20 carbon atoms.
- the monocyclic aryl group includes, but is not limited to, phenyl group, biphenyl group, and terphenyl group.
- the polycyclic aryl group includes, but is not limited to, naphthyl group, anthracenyl group, phenanthrenyl group, pyrenyl group, perylenyl group, triphenylenyl group, chrysenyl group, and fluorenyl group.
- the fluorenyl group may be substituted, and two substituents may be combined with each other to form a spiro structure.
- the heterocyclic group is an aromatic, aliphatic, or condensed ring group of aromatic and aliphatic containing one or more of N, O, P, and S as heteroatoms.
- the number of carbon atoms of the heterocyclic group is not particularly limited, but may have 2 to 60 carbon atoms.
- the heteroaryl group is an aromatic ring group containing one or more of N, O, P, and S as heteroatoms, and the number of carbon atoms is not particularly limited, but may have 2 to 60 carbon atoms. According to one embodiment, the heteroaryl group has 2 to 30 carbon atoms.
- the heteroaryl group include pyridine group, pyrrole group, pyrimidine group, pyridazine group, furan group, thiophene group, benzothiophene group, benzofuran group, dibenzothiophene group, dibenzofuran group, and carbazole group. etc., but is not limited to these.
- the hydrocarbon ring group may be an aromatic ring, an aliphatic ring, or a ring in which an aromatic ring and an aliphatic ring are condensed.
- an arylene group refers to an aryl group having two bonding positions, that is, a bivalent group.
- the description of the aryl group described above can be applied except that these are divalent groups.
- a heteroarylene group refers to a heteroaryl group having two bonding positions, that is, a bivalent group.
- the description of the heteroaryl group described above can be applied, except that these are divalent groups.
- F in Formula 1 means fluorine.
- X1 and X2 are the same or different from each other and are each independently a curable group.
- the curable group has any one of the following structures.
- L51 to L56 are the same or different from each other and are each independently directly bonded; -O-; Substituted or unsubstituted alkylene group; And any one or two or more selected from the group consisting of substituted or unsubstituted arylene groups are connected,
- X1 and X2 are the same or different from each other, and each independently has one of the following structures.
- X1 and X2 are the same or different from each other, and each independently has one of the following structures.
- Formula 1 is Formula 2 below.
- Cy1 to Cy4, Y1, Y2, L, L1 to L4, L10, L11, X1, X2, R1 to R4, n1 to n4, m1 and m2 are as in Formula 1.
- L10 and L11 are the same or different from each other, and each independently represents a substituted or unsubstituted C 6-60 arylene group.
- L10 and L11 are the same or different from each other, and each independently represents a substituted or unsubstituted C 6-30 arylene group.
- L10 and L11 are the same as or different from each other, and are each independently a substituted or unsubstituted phenylene group; Substituted or unsubstituted biphenylene group; Substituted or unsubstituted terphenylene group; Or a substituted or unsubstituted naphthylene group.
- L10 and L11 are the same or different from each other, and each independently represents a substituted or unsubstituted phenylene group.
- Formula 1 is the following Formula 2-1.
- R5 and R6 are the same or different from each other and are each independently hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted alkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group,
- n5 and n6 are each integers from 0 to 4, and when n5 and n6 are each 2 or more, 2 or more substituents in parentheses are the same or different from each other.
- R5 and R6 are the same as or different from each other, and are each independently hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted C 1-20 alkyl group; Substituted or unsubstituted C 1-20 alkoxy group; Substituted or unsubstituted C 6-30 aryl group; Or a substituted or unsubstituted C 2-30 heteroaryl group.
- R5 and R6 are the same as or different from each other, and are each independently hydrogen; heavy hydrogen; halogen group; C 1-20 alkyl group; Alkoxy group of C 1-20 ; Aryl group of C 6-30 ; Or it is a C 2-30 heteroaryl group.
- R5 and R6 are each hydrogen; Or deuterium.
- Cy1 to Cy4 are the same or different from each other and are each independently a substituted or unsubstituted aromatic ring.
- Cy1 to Cy4 are the same or different from each other and are each independently an aromatic ring.
- Cy1 to Cy4 are the same or different from each other, and are each independently a substituted or unsubstituted benzene ring; Or a substituted or unsubstituted naphthalene ring.
- Cy1 to Cy4 are each a benzene ring.
- Formula 1 is Formula 3 below.
- Y1, Y2, L, L1 to L4, L10, L11, X1, X2, R1 to R4, n1 to n4, m1 and m2 are as in Formula 1,
- R50 and R51 are the same or different from each other and are each independently hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted alkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryl group; Or it is a substituted or unsubstituted heteroaryl group, or combines with an adjacent group to form a substituted or unsubstituted ring,
- n50 and n51 are each integers of 1 to 7, and when n50 and n51 are each 2 or more, two or more substituents in parentheses are the same or different from each other.
- Formula 3 is the following Formula 3-1 or 3-2.
- Y1, Y2, L, L1 to L4, L10, L11, X1, X2, R1 to R4, n1 to n4, m1 and m2 are as in Formula 1,
- R60 to R63 are the same or different from each other, and are each independently hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted alkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group,
- n60 and n61 are each integers of 1 to 7
- n62 and n63 are each integers of 1 to 9
- Formula 3 is any one of the following Formulas 3-11 to 3-18.
- Y1, Y2, L, L1 to L4, L10, L11, X1, X2, R1 to R4, n1 to n4, m1 and m2 are as in Formula 1,
- R60 to R63 are the same or different from each other, and are each independently hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted alkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group,
- n60 and n61 are each integers of 1 to 7
- n62 and n63 are each integers of 1 to 9
- R60 to R63 are each hydrogen; Or deuterium.
- L is substituted or unsubstituted C 6-60 divalent hydrocarbon ring group; Or it is a substituted or unsubstituted C 2-60 divalent heterocyclic group.
- L is substituted or unsubstituted C 6-30 divalent hydrocarbon ring group; Or it is a substituted or unsubstituted C 2-30 divalent heterocyclic group.
- L is a substituted or unsubstituted C 6-30 divalent hydrocarbon ring group.
- L is a divalent hydrocarbon ring group unsubstituted or substituted with an alkyl group or an aryl group.
- L is any one of the following structures.
- R10 to R31 are the same or different from each other, and are each independently hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted alkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group,
- n10 to n21 are each integers from 1 to 4
- n22, n23, n28 and n29 are each integers from 1 to 3
- n24 and n25 are each integers from 1 to 7
- n26 is an integer from 1 to 8
- n27 is an integer from 1 to 6, and when n10 to n29 are each 2 or more, 2 or more substituents in parentheses are the same or different from each other,
- R10 to R29 are the same as or different from each other, and are each independently hydrogen; heavy hydrogen; Or it is a substituted or unsubstituted alkyl group.
- R10 to R29 are the same as or different from each other, and are each independently hydrogen; heavy hydrogen; Or it is a substituted or unsubstituted C 1-20 alkyl group.
- R10 to R29 are the same as or different from each other, and are each independently hydrogen; heavy hydrogen; Or it is a C 1-20 alkyl group.
- R30 and R31 are the same or different from each other, and each independently represents a substituted or unsubstituted alkyl group.
- R30 and R31 are the same or different from each other, and each independently represents a substituted or unsubstituted C 1-20 alkyl group.
- R30 and R31 are the same as or different from each other, and are each independently a C 1-20 alkyl group.
- L1 to L4 are the same or different from each other and are each independently directly bonded; Substituted or unsubstituted C 6-60 arylene group; Or a substituted or unsubstituted C 2-60 heteroarylene group.
- L1 to L4 are the same or different from each other and are each independently directly bonded; Or it is a substituted or unsubstituted C 6-30 arylene group.
- L1 to L4 are the same or different from each other and are each independently directly bonded; Or it is a C 6-30 arylene group substituted or unsubstituted by a halogen group or an alkyl group.
- L1 to L4 are the same or different from each other and are each independently directly bonded; Substituted or unsubstituted phenylene group; Substituted or unsubstituted biphenylene group; Substituted or unsubstituted terphenylene group; Or a substituted or unsubstituted naphthylene group.
- L1 to L4 are the same or different from each other and are each independently directly bonded; Substituted or unsubstituted phenylene group; Or a substituted or unsubstituted biphenylene group.
- L1 to L4 are the same or different from each other and are each independently directly bonded; Phenylene group substituted or unsubstituted with deuterium, halogen group, or alkyl group; Or it is a biphenylene group substituted or unsubstituted with deuterium, halogen group, or alkyl group.
- L1 to L4 are the same or different from each other and are each independently directly bonded; Phenylene group substituted or unsubstituted with deuterium, F or C 1-20 alkyl group; Or it is a biphenylene group substituted or unsubstituted with deuterium, F or C 1-20 alkyl group.
- R1 to R4 are the same as or different from each other, and are each independently hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted C 1-20 alkyl group; Substituted or unsubstituted C 1-20 alkoxy group; Substituted or unsubstituted C 6-30 aryl group; Or a substituted or unsubstituted C 2-30 heteroaryl group.
- R1 to R4 are the same as or different from each other, and are each independently hydrogen; heavy hydrogen; Or it is a substituted or unsubstituted C 1-30 alkyl group.
- R1 to R4 are the same as or different from each other, and are each independently hydrogen; heavy hydrogen; Or it is an alkyl group.
- Y1 and Y2 are the same or different from each other and are each independently O or S.
- n1 and m2 are each integers of 1 to 5.
- m1 is 1.
- m1 is 2.
- m1 is 3.
- m1 is 4.
- m1 is 5.
- m2 is 1.
- m2 is 2.
- m2 is 3.
- m2 is 4.
- m2 is 5.
- the compound of Formula 1 has any one of the following structures.
- the compound of Formula 1 may have a core structure prepared as shown in the following reaction scheme.
- the substituents may be combined by methods known in the art, and the type, position, or number of substituents may be changed according to techniques known in the art.
- Cy1 to Cy4, Y1, Y2, L, L1 to L4, L10, L11, X1, X2, R1 to R4, n1 to n4, m1 and m2 are as defined in Formula 1.
- An exemplary embodiment of the present specification provides a coating composition containing the compound of Formula 1 described above.
- the coating composition further includes a solvent. In one embodiment of the present specification, the coating composition includes the compound of Formula 1 and a solvent.
- the coating composition may be in a liquid form.
- the “liquid phase” means that it is in a liquid state at room temperature and pressure.
- the coating composition when the coating composition is applied to the organic material layer, a solvent that does not dissolve the material in the lower layer is used. Accordingly, there is an advantage that the organic layer can be introduced through a solution process.
- the compound contains a curable group, solvent resistance is improved during heat treatment after coating. That is, the compound is crosslinked after coating and therefore does not dissolve in a specific solvent.
- the coating composition is prepared using a solvent that dissolves the compound and the layer is prepared through a solution process, it may be resistant to the same solvent when cured through heat treatment.
- the curing process may be photocuring or thermal curing.
- the curing process may be photocuring or thermal curing.
- it is cured through heat treatment or light treatment, so it is possible to introduce the upper layer through a solution process.
- the advantage is that the upper layer can be introduced through a solution process by using a specific solvent to which the cured coating composition is resistant when manufacturing the upper layer (hole transport layer, etc.). there is.
- the solvent included in the coating composition is a solvent that dissolves the compound.
- solvents include chlorine-based solvents such as chloroform, methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene, and o-dichlorobenzene; Ether-based solvents such as tetrahydrofuran and dioxane; Aromatic hydrocarbon solvents such as toluene, xylene, trimethylbenzene, and mesitylene; Ketone-based solvents such as acetone, methyl ethyl ketone, and cyclohexanone; Ester solvents such as ethyl acetate, butyl acetate, and ethyl cellosolve acetate; Polyhydric acids such as ethylene glycol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, dimethoxy
- Alcohol-based solvents such as methanol, ethanol, propanol, isopropanol, and cyclohexanol
- Sulfoxide-based solvents such as dimethyl sulfoxide
- Amide-based solvents such as N-methyl-2-pyrrolidone and N,N-dimethylformamide
- Benzoate-based solvents such as methyl benzoate, butyl benzoate, and 3-phenoxy benzoate
- tetralin any solvent that can dissolve or disperse the compound according to an exemplary embodiment of the present specification can be used, and is not limited to these.
- one type of solvent may be used alone, or two or more types of solvent may be mixed.
- the coating composition does not further include a p-doping material.
- the coating composition further includes a p-doping material.
- the p-doping material refers to a material that causes the host material to have p-semiconductor characteristics.
- the p semiconductor characteristic refers to the characteristic of injecting or transporting holes at the HOMO (highest occupied molecular orbital) energy level, that is, the characteristic of a material with high hole conductivity.
- the p-doping material may have any one of the structures below, but is not limited thereto.
- the p-doping material is sufficient as long as it has p-semiconductor properties, and one type or two or more types can be used, and the type is not limited.
- the content of the p-doping material is 0% by weight to 500% by weight based on the compound of Formula 1. Specifically, the content of the p-doping material is 100% by weight to 400% by weight based on the compound of Formula 1.
- the p-doping material is contained in an amount of 0 to 50% by weight based on the total solid content of the coating composition. In one embodiment of the present specification, the p-doping material preferably contains 1 to 50% by weight based on the total solids content of the coating composition, and 10 to 30% by weight based on the total solids content of the coating composition. It is more preferable to include %.
- the coating composition is a single molecule containing a functional group that can be crosslinked by heat or light; Or, it further includes a single molecule containing a terminal group capable of forming a polymer by heat.
- a single molecule containing a functional group that can be crosslinked by heat or light may be a compound with a molecular weight of 3,000 g/mol or less.
- a single molecule containing a functional group that can be crosslinked by heat or light includes aryl such as phenyl, biphenyl, fluorene, and naphthalene; Arylamine; Alternatively, it may be a single molecule in which fluorene is substituted with a functional group that can be crosslinked by heat or light or a terminal group that can form a polymer by heat.
- the viscosity of the coating composition at room temperature is 2 cP to 15 cP. Specifically, the viscosity of the coating composition is 2 cP to 10 cP. If the above viscosity is satisfied, it is easy to manufacture a device.
- One embodiment of the present specification provides an organic light-emitting device formed using the coating composition.
- An exemplary embodiment of the present specification includes a first electrode; second electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one layer of the organic material layer includes the coating composition or a cured product thereof.
- the cured product of the coating composition is in a state in which the coating composition has been cured by heat treatment or light treatment.
- the organic material layer containing the coating composition or a cured product thereof is a hole transport layer, a hole injection layer, or a layer that performs hole transport and hole injection simultaneously.
- the organic material layer containing the coating composition or a cured product thereof is an electron transport layer, an electron injection layer, or a layer that performs electron transport and electron injection simultaneously.
- the organic layer containing the coating composition or a cured product thereof is a light-emitting layer.
- the organic layer containing the coating composition or a cured product thereof is a light-emitting layer
- the light-emitting layer includes the compound of the present invention as a host of the light-emitting layer.
- the organic material layer containing the coating composition or a cured product thereof is a light-emitting layer
- the light-emitting layer includes the compound of the present invention as a dopant of the light-emitting layer.
- the organic light emitting device is a hole injection layer or a hole transport layer. It includes one or two or more layers selected from the group consisting of an electron transport layer, an electron injection layer, an electron blocking layer, a hole blocking layer, a layer that performs both hole injection and hole transport, and a layer that performs both electron transport and electron injection. .
- the first electrode is an anode and the second electrode is a cathode.
- the first electrode is a cathode
- the second electrode is an anode
- the organic light emitting device may be a normal type organic light emitting device in which an anode, one or more organic material layers, and a cathode are sequentially stacked on a substrate.
- the organic light emitting device may be an inverted type organic light emitting device in which a cathode, one or more organic material layers, and an anode are sequentially stacked on a substrate.
- the organic material layer of the organic light emitting device of the present specification may have a single-layer structure, or may have a multi-layer structure in which two or more organic material layers are stacked.
- the organic light-emitting device of the present invention includes at least two of the organic material layers: a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, a layer that simultaneously performs hole injection and hole transport, and a layer that performs both electron transport and electron injection. It may have a structure containing layers.
- the structure of the organic light emitting device is not limited to this and may include fewer organic layers.
- FIG. 1 the structure of an organic light-emitting device according to an exemplary embodiment of the present specification is illustrated in FIG. 1.
- a first electrode 201, a hole injection layer 301, a hole transport layer 401, a light emitting layer 501, an electron transport and injection layer 601, and a second electrode 701 are provided on the substrate 101.
- the structure of sequentially stacked organic light emitting devices is illustrated.
- FIG. 1 illustrates an organic light-emitting device, and the structure of the organic light-emitting device of the present invention is not limited thereto.
- the organic material layers may be formed of the same material or different materials.
- the organic light emitting device of the present invention may be stacked in a structure as shown in the example below.
- electroctron transport layer/electron injection layer can be replaced with “electron transport and injection layer” or “layer that simultaneously performs electron transport and electron injection.”
- hole injection layer/hole transport layer can be replaced with “hole injection and transport layer” or “layer that simultaneously performs hole transport and hole injection.”
- the organic light emitting device of the present specification can be manufactured using materials and methods known in the art, except that at least one organic layer is formed using a coating composition containing the compound of Formula 1 above.
- the organic light emitting device of the present specification can be manufactured by sequentially stacking an anode, an organic material layer, and a cathode on a substrate.
- a PVD (physical vapor deposition) method such as sputtering or e-beam evaporation is used to deposit a metal or a conductive metal oxide or an alloy thereof on the substrate to form an anode.
- a material layer including a hole injection layer, a hole transport layer, a light emitting layer, and a layer that simultaneously performs electron transport and electron injection through a solution process, a deposition process, etc., and then depositing a material that can be used as a cathode on it. It can be.
- an organic light-emitting device can be made by sequentially depositing a cathode material, an organic material layer, and an anode material on a substrate.
- This specification also provides a method of manufacturing an organic light-emitting device formed using the coating composition.
- one embodiment of the present specification includes preparing a first electrode; Forming one or more organic layers on the first electrode; and forming a second electrode on the organic layer, wherein forming the organic layer includes forming one or more organic layers using the coating composition.
- the step of forming one or more organic layers using the coating composition uses a spin coating method.
- the step of forming one or more organic layers using the coating composition uses a printing method.
- the printing method includes, for example, inkjet printing, nozzle printing, offset printing, transfer printing, or screen printing, but is not limited thereto.
- the coating composition according to an exemplary embodiment of the present specification is suitable for a solution process due to its structural characteristics and can be formed by a printing method, so it is economical in terms of time and cost when manufacturing a device.
- forming one or more organic layers using the coating composition includes coating the coating composition on the first electrode; and heat-treating or light-treating the coated coating composition.
- the heat treatment step may be performed through heat treatment.
- the heat treatment temperature in the heat treatment step is 85°C to 250°C. Specifically, it may be 100°C to 250°C, and more specifically, it may be 150°C to 250°C.
- the heat treatment time in the heat treatment step is 1 minute to 2 hours, according to one embodiment, it may be 1 minute to 1 hour, and in another embodiment, 30 minutes. It may be from 1 hour to 1 hour.
- the light treatment step may be performed through UV irradiation.
- the light treatment step may be performed for 30 minutes to 5 hours.
- the step of coating the coating composition on the first electrode includes coating the coating composition on the first electrode and coating the coating composition on another organic layer provided on the first electrode. Includes.
- the other organic material layer refers to an organic material layer formed of another material without including a coating composition or a cured product thereof.
- a solvent that does not dissolve the material of the lower layer is used.
- the coating composition when the coating composition is applied to the hole transport layer, the coating composition includes a solvent that does not dissolve the materials of the lower layer (first electrode, hole injection layer, etc.).
- a plurality of the compounds included in the coating composition may form crosslinks to provide an organic material layer including a thin film structure.
- it can be prevented from being dissolved by a solvent, morphologically affected, or decomposed.
- the organic material layer formed using the coating composition is formed including a heat treatment or light treatment step, the resistance to solvent increases, so that a multilayer can be formed by repeatedly performing the solution deposition and crosslinking methods, and the stability increases, thereby improving the device's stability. Lifespan characteristics can be increased.
- the anode material is generally preferably a material with a large work function to ensure smooth hole injection into the organic layer.
- anode materials include metals such as vanadium, chromium, copper, zinc, and gold, or alloys thereof; metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), and indium zinc oxide (IZO); ZnO:Al or SnO 2 : A combination of a metal such as Sb and an oxide; Conductive polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene](PEDOT), polypyrrole, and polyaniline are included, but are not limited to these.
- the cathode material is preferably a material with a small work function to facilitate electron injection into the organic layer.
- cathode materials include metals such as barium, magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin and lead, or alloys thereof; There are, but are not limited to, multi-layered materials such as LiF/Al or LiO 2 /Al.
- the hole injection layer is a layer that injects holes from an electrode, and the hole injection material has the ability to transport holes and has an excellent hole injection effect at the anode, a light emitting layer, or a light emitting material.
- a compound that has an injection effect, prevents movement of excitons generated in the light-emitting layer to the electron injection layer or electron injection material, and has excellent thin film forming ability is preferred.
- the highest occupied molecular orbital (HOMO) of the hole injection material is between the work function of the anode material and the HOMO of the surrounding organic material layer.
- hole injection materials include the compounds of Chemical Formula 1, metal porphyrins, oligothiophenes, arylamine-based organic substances, hexanitrilehexaazatriphenylene-based organic substances, and quinacridone-based organic substances. , perylene-based organic materials, anthraquinone, and polyaniline- and polythiophene-based conductive polymers, etc., but are not limited to these.
- the hole injection layer includes the compound of the present invention described above. Additionally, in one embodiment of the present specification, the hole injection layer further includes a p-doping material. The p-doping material included in the hole injection layer is as described above in the description related to the coating composition.
- the hole transport layer is a layer that receives holes from the hole injection layer and transports holes to the light-emitting layer, and the hole transport material can receive holes from the anode or the hole injection layer and transfer them to the light-emitting layer.
- a material with high mobility for holes is suitable.
- hole transport materials include, but are not limited to, arylamine-based organic materials, conductive polymers, and block copolymers having both conjugated and non-conjugated portions. More specifically, the hole transport layer may be a compound containing an arylamine group.
- the hole transport layer includes a compound of the following formula HT-1.
- L201 is a substituted or unsubstituted arylene group
- R201 to R204 are the same or different from each other, and are each independently hydrogen; heavy hydrogen; Substituted or unsubstituted alkyl group; Substituted or unsubstituted cycloalkyl group; Substituted or unsubstituted aryl group; Or it is a substituted or unsubstituted heterocyclic group.
- L201 is a substituted or unsubstituted arylene group having 6 to 30 carbon atoms.
- L201 is an arylene group.
- L201 is a substituted or unsubstituted phenylene group; Substituted or unsubstituted biphenylene group; Or a substituted or unsubstituted naphthylene group.
- L201 is a phenylene group; Biphenylene group; Or it is a naphthylene group.
- L201 is a biphenylene group.
- R201 to R204 are the same or different from each other, and are each independently hydrogen; heavy hydrogen; A substituted or unsubstituted alkyl group having 1 to 30 carbon atoms; A substituted or unsubstituted cycloalkyl group having 3 to 30 carbon atoms; A substituted or unsubstituted aryl group having 6 to 30 carbon atoms; Or it is a substituted or unsubstituted heterocyclic group having 2 to 30 carbon atoms.
- R201 to R204 are the same as or different from each other, and each independently represents a substituted or unsubstituted aryl group having 6 to 30 carbon atoms.
- R201 to R204 are the same as or different from each other, and each independently represents an aryl group.
- R201 to R204 are the same as or different from each other, and are each independently a substituted or unsubstituted phenyl group; Substituted or unsubstituted biphenyl group; Or a substituted or unsubstituted naphthyl group.
- R201 to R204 are the same as or different from each other, and are each independently a phenyl group; Biphenyl group; Or it is a naphthyl group.
- the chemical formula HT-1 has the following structure.
- the light-emitting material included in the light-emitting layer is a material that can emit light in the visible light range by receiving holes and electrons from the hole transport layer and the electron transport layer, respectively, and combining them.
- Materials with good quantum efficiency are desirable.
- Specific examples include 8-hydroxy-quinoline aluminum complex (Alq 3 ); Carbazole-based compounds; dimerized styryl compounds; BAlq; 10-hydroxybenzoquinoline-metal compound; Compounds of the benzoxazole, benzthiazole and benzimidazole series; Poly(p-phenylenevinylene) (PPV) series polymer; Spiro compounds; Polyfluorene, rubrene, etc., but are not limited to these.
- Alq 3 8-hydroxy-quinoline aluminum complex
- Carbazole-based compounds dimerized styryl compounds
- BAlq 10-hydroxybenzoquinoline-metal compound
- the light emitting layer may include a host and a dopant.
- a condensed aromatic ring derivative or a heterocyclic ring-containing compound may be used.
- condensed aromatic ring derivatives include anthracene derivatives, pyrene derivatives, naphthalene derivatives, pentacene derivatives, phenanthrene compounds, and fluoranthene compounds
- heterocycle-containing compounds include carbazole derivatives, dibenzofuran derivatives, and ladder-type compounds. These include, but are not limited to, furan compounds and pyrimidine derivatives. More specifically, an anthracene derivative may be used as the host.
- the host of the light-emitting layer includes a compound of the following formula EH-1.
- L301 and L302 are the same or different from each other and are each independently directly bonded; Substituted or unsubstituted arylene group; Or a substituted or unsubstituted heterocyclic group,
- Ar301 and Ar302 are the same or different from each other and are each independently hydrogen; heavy hydrogen; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heterocyclic group,
- R301 is hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted alkyl group; Substituted or unsubstituted cycloalkyl group; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heterocyclic group,
- r301 is an integer from 1 to 8, and when r301 is 2 or more, 2 or more R301 are the same or different from each other.
- L301 and L302 are the same or different from each other and are each independently directly bonded; A substituted or unsubstituted monocyclic arylene group; Or it is a substituted or unsubstituted polycyclic arylene group.
- L301 and L302 are the same or different from each other and are each independently directly bonded; Substituted or unsubstituted phenylene group; Substituted or unsubstituted biphenylene group; Or a substituted or unsubstituted naphthylene group.
- L301 and L302 are each a direct bond.
- Ar301 and Ar302 are the same or different from each other, and each independently represents a substituted or unsubstituted aryl group.
- Ar301 and Ar302 are the same or different from each other, and are each independently a substituted or unsubstituted monocyclic aryl group; Or it is a substituted or unsubstituted polycyclic aryl group.
- Ar301 and Ar302 are the same or different from each other, and are each independently a substituted or unsubstituted phenyl group; Substituted or unsubstituted biphenyl group; Substituted or unsubstituted terphenyl group; Substituted or unsubstituted naphthyl group; Substituted or unsubstituted anthracenyl group; Substituted or unsubstituted phenanthrene group; Substituted or unsubstituted triphenylene group; Substituted or unsubstituted pyrene group; Or a substituted or unsubstituted fluorenyl group.
- Ar301 and Ar302 are the same or different from each other, and are each independently a substituted or unsubstituted phenyl group; Or a substituted or unsubstituted naphthyl group.
- Ar301 and Ar302 are each a naphthyl group.
- R301 is hydrogen; Or deuterium.
- the formula EH-1 is one of the following structures.
- the dopant may be an aromatic amine derivative, a strylamine compound, a boron complex, a fluoranthene compound, a metal complex, etc.
- aromatic amine derivatives are condensed aromatic ring derivatives having a substituted or unsubstituted arylamino group, and include pyrene, anthracene, chrysene, and periplanthene having an arylamino group
- styrylamine compounds are substituted or unsubstituted arylamino groups.
- Arylamine is a compound in which at least one arylvinyl group is substituted, and is substituted or unsubstituted with one or two or more substituents selected from the group consisting of aryl group, silyl group, alkyl group, cycloalkyl group, and arylamino group.
- substituents selected from the group consisting of aryl group, silyl group, alkyl group, cycloalkyl group, and arylamino group.
- styrylamine, styryldiamine, styryltriamine, styryltetraamine, etc. are included, but are not limited thereto.
- metal complexes include, but are not limited to, iridium complexes and platinum complexes. More specifically, a compound containing an arylamine group may be used as the dopant.
- the dopant of the light-emitting layer includes a compound of the following formula ED-1.
- Ar501 to Ar504 are the same as or different from each other, and are each independently hydrogen; heavy hydrogen; Substituted or unsubstituted alkyl group; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group.
- the formula ED-1 is the formula ED-2 below.
- Ar501 to Ar504 are as defined in Chemical Formula ED-1 above.
- Ar501 to Ar504 are the same or different from each other, and each independently represents a substituted or unsubstituted aryl group.
- Ar501 to Ar504 are the same as or different from each other, and are each independently a substituted or unsubstituted phenyl group; Substituted or unsubstituted biphenyl group; Substituted or unsubstituted terphenyl group; Or a substituted or unsubstituted naphthyl group.
- Ar501 to Ar504 are the same as or different from each other, and are each independently a phenyl group substituted or unsubstituted by a silyl group; Biphenyl group substituted or unsubstituted with a silyl group; Terphenyl group substituted or unsubstituted with a silyl group; Or it is a naphthyl group substituted or unsubstituted with a silyl group.
- Ar501 to Ar504 are the same or different from each other, and each independently represents a phenyl group substituted or unsubstituted by a silyl group.
- the silyl group is a group represented by -SiRcRd, where Rc and Rd are the same or different from each other, and are each independently hydrogen; heavy hydrogen; Substituted or unsubstituted alkyl group; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heteroaryl group.
- the number of carbon atoms in the silyl group is not particularly limited, but is preferably 1 to 60.
- the formula ED-1 has the following structure.
- the electron transport layer is a layer that receives electrons from the electron injection layer and transports the electrons to the light emitting layer.
- the electron transport material is a material that can easily receive electrons from the cathode and transfer them to the light-emitting layer, and a material with high mobility for electrons is suitable. Specific examples include Al complex of 8-hydroxyquinoline; Complex containing Alq 3 ; organic radical compounds; Hydroxyflavone-metal complexes, etc., but are not limited to these.
- the electron transport layer can be used with any desired cathode material as used according to the prior art.
- suitable cathode materials are conventional materials with a low work function followed by an aluminum or silver layer. Specifically, cesium, barium, calcium, ytterbium and samarium, in each case followed by an aluminum layer or a silver layer.
- the electron injection layer is a layer that injects electrons from an electrode.
- the electron injection material has the ability to transport electrons, has an excellent electron injection effect from the cathode, a light emitting layer or a light emitting material, prevents movement of excitons generated in the light emitting layer to the hole injection layer, and thin film Compounds with excellent forming ability are preferred.
- the metal complex compound includes 8-hydroxyquinolinato lithium, bis(8-hydroxyquinolinato)zinc, bis(8-hydroxyquinolinato)copper, and bis(8).
- -Hydroxyquinolinato)manganese tris(8-hydroxyquinolinato)aluminum, tris(2-methyl-8-hydroxyquinolinato)aluminum, tris(8-hydroxyquinolinato)gallium, bis.
- the electron transport layer and the electron injection layer may be formed as a layer that simultaneously performs electron transport and electron injection, and may be expressed as an electron transport and injection layer.
- the materials applied to the electron transport and injection layer can be all of the electron transport materials and electron injection materials described above.
- a benzimidazole-based compound may be used in the electron transport and injection layer.
- the electron transport and injection layer includes a compound of the following formula ET-1.
- L601 and L602 are the same or different from each other and are each independently directly bonded; Substituted or unsubstituted arylene group; Or a substituted or unsubstituted heterocyclic group,
- Ar601 and Ar602 are the same or different from each other and are each independently hydrogen; heavy hydrogen; Substituted or unsubstituted aryl group; Or a substituted or unsubstituted heterocyclic group,
- R601 is hydrogen; heavy hydrogen; halogen group; Substituted or unsubstituted alkyl group; Substituted or unsubstituted cycloalkyl group; Substituted or unsubstituted aryl group; Or it is a substituted or unsubstituted heterocyclic group.
- L601 and L602 are the same or different from each other and are each independently directly bonded; A substituted or unsubstituted monocyclic arylene group; Or it is a substituted or unsubstituted polycyclic arylene group.
- L601 and L602 are the same or different from each other and are each independently directly bonded; Substituted or unsubstituted phenylene group; Substituted or unsubstituted biphenylylene group; Or a substituted or unsubstituted naphthylene group.
- L601 and L602 are each a direct bond.
- Ar601 and Ar602 are the same or different from each other, and each independently represents a substituted or unsubstituted aryl group.
- Ar601 and Ar602 are the same or different from each other, and are each independently a substituted or unsubstituted monocyclic aryl group; Or it is a substituted or unsubstituted polycyclic aryl group.
- Ar601 and Ar602 are the same or different from each other, and are each independently a substituted or unsubstituted phenyl group; Substituted or unsubstituted biphenyl group; Substituted or unsubstituted terphenyl group; Substituted or unsubstituted naphthyl group; Substituted or unsubstituted anthracenyl group; Substituted or unsubstituted phenanthrenyl group; Substituted or unsubstituted triphenylenyl group; Substituted or unsubstituted pyrenyl group; Or a substituted or unsubstituted fluorenyl group.
- Ar601 and Ar602 are the same or different from each other, and are each independently a substituted or unsubstituted phenyl group; Or a substituted or unsubstituted naphthyl group.
- Ar601 and Ar602 are each a naphthyl group.
- R601 is a substituted or unsubstituted aryl group.
- R601 is a substituted or unsubstituted phenyl group.
- the formula ET-1 has the following structure.
- the hole blocking layer is a layer that prevents holes from reaching the cathode, and can generally be formed under the same conditions as the hole injection layer.
- hole blocking materials include, but are not limited to, oxadiazole derivatives, triazole derivatives, phenanthroline derivatives, BCP, and aluminum complexes.
- the electron blocking layer is a layer that prevents electrons from reaching the anode, and materials known in the art may be used.
- the organic light emitting device may be a front emitting type, a back emitting type, or a double-sided emitting type depending on the material used.
- a glass substrate coated with a thin film of ITO (indium tin oxide) with a thickness of 1,500 ⁇ was placed in distilled water with a detergent dissolved in it and washed ultrasonically.
- a detergent from Fischer Co. was used, and distilled water filtered secondarily using a filter from Millipore Co. was used as distilled water.
- ultrasonic cleaning was repeated twice with distilled water for 10 minutes.
- ultrasonic cleaning was performed with isopropyl and acetone solvents and drying, the substrate was washed for 5 minutes and then transported to a glove box.
- 2 wt% toluene ink of Compound A below was spin coated on the hole injection layer and heat treated at 120°C for 10 minutes to form a hole transport layer with a thickness of 200 ⁇ .
- Compound B and Compound C below were vacuum deposited on the hole transport layer at a weight ratio of 92:8 to form a 200 ⁇ thick light emitting layer.
- Compound D below was vacuum deposited on the emitting layer to form an electron transport and injection layer with a thickness of 350 ⁇ .
- a cathode was formed by sequentially depositing LiF to a thickness of 10 ⁇ and aluminum to a thickness of 1000 ⁇ on the electron transport and injection layer.
- the deposition rate of organic materials was maintained at 0.4 ⁇ /sec to 0.7 ⁇ /sec
- the deposition rate of lithium fluoride on the cathode was maintained at 0.3 ⁇ /sec
- aluminum was maintained at 2 ⁇ /sec
- the vacuum level during deposition was 2 x 10 -7 torr to 5 x 10 -8 torr was maintained.
- HIL hole injection layer
- An organic light-emitting device was manufactured in the same manner as in Experimental Example 1, except that the compounds listed in Table 1 below were used instead of Compound 1 when manufacturing the hole injection layer.
- Compounds CE1 to CE15 used in Comparative Examples 1 to 15 are as follows.
- the results of measuring the driving voltage, external quantum efficiency, luminance, and lifespan of the organic light-emitting devices manufactured in the experimental examples and comparative examples at a current density of 10 mA/cm 2 are shown in Table 1 below.
- the external quantum efficiency was calculated as (number of photons emitted)/(number of injected charge carriers).
- T95 refers to the time (hr) required for the luminance to decrease from the initial luminance (500 nit) to 95%.
- Experimental Examples 1 to 9 used the compound represented by Formula 1 according to the present invention as a host of the hole injection layer, and Comparative Examples 1 to 15 used compounds CE1, CE2, CE11 to CE11 to which a fluoro group (-F) was not bonded.
- CE15 (Comparative Examples 1, 2, 11 to 15), compound CE3 (Comparative Example 3) containing four or more curing groups, CE4 (Comparative Example 4) containing no curing groups, or a compound containing an aryl group instead of a heteroaryl group.
- Compounds CE5 to CE10 (Comparative Examples 5 to 10) were used.
- the organic light-emitting devices (Experimental Examples 1 to 9) using the compound represented by Formula 1 according to the present invention as a host of the hole injection layer have a driving voltage compared to the organic light-emitting devices of Comparative Examples 1 to 15. It can be seen that this is greatly reduced and the lifespan is greatly improved. In addition, it can be confirmed that the efficiency and luminance of the organic light-emitting devices of Experimental Examples 1 to 9 are increased compared to the organic light-emitting devices of Comparative Examples 1 to 15.
- the membrane and interface properties are improved by the heteroaryl group (dibenzofuran group, etc.) and fluoro group (-F) introduced into the molecule, and the hole mobility and hole/electron balance are improved due to changes in the HOMO level, thereby improving organic It was confirmed that the performance of the light emitting device was improved. Meanwhile, in the case of Comparative Example 3 using a compound having four or more curing groups, the driving voltage appears to increase and the lifespan decreases due to the curing groups remaining uncured even after heat treatment.
- Comparative Example 4 which uses a compound without a hardening group, it does not have solvent resistance even after heat treatment, so it can be seen that most of the material is washed away when forming the hole transport layer (HTL), and the device does not operate properly.
- HTL hole transport layer
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Abstract
Description
HIL host | 구동전압 (V) |
외부양자효율 (%) |
휘도 (cd/m2) |
T95(hr) @500 nit |
|
실험예 1 | 화합물 1 | 4.71 | 5.6 | 597 | 193 |
실험예 2 | 화합물 2 | 4.53 | 5.5 | 603 | 191 |
실험예 3 | 화합물 3 | 4.55 | 5.6 | 610 | 153 |
실험예 4 | 화합물 4 | 4.49 | 5.8 | 624 | 188 |
실험예 5 | 화합물 5 | 4.86 | 5.1 | 547 | 159 |
실험예 6 | 화합물 6 | 4.73 | 5.3 | 573 | 182 |
실험예 7 | 화합물 7 | 4.74 | 5.4 | 585 | 151 |
실험예 8 | 화합물 8 | 4.90 | 5.2 | 553 | 164 |
실험예 9 | 화합물 9 | 4.81 | 5.2 | 561 | 175 |
비교예 1 | CE1 | 5.47 | 4.9 | 462 | 92 |
비교예 2 | CE2 | 5.51 | 4.7 | 425 | 88 |
비교예 3 | CE3 | 6.13 | 5.2 | 514 | 51 |
비교예 4 | CE4 | 8.50 | 1.3 | 100 | 30 |
비교예 5 | CE5 | 5.22 | 4.7 | 428 | 134 |
비교예 6 | CE6 | 5.31 | 4.9 | 459 | 141 |
비교예 7 | CE7 | 5.28 | 4.6 | 420 | 137 |
비교예 8 | CE8 | 5.38 | 4.8 | 447 | 121 |
비교예 9 | CE9 | 5.56 | 4.7 | 441 | 127 |
비교예 10 | CE10 | 5.63 | 4.1 | 395 | 115 |
비교예 11 | CE11 | 5.47 | 5.0 | 465 | 101 |
비교예 12 | CE12 | 5.50 | 5.1 | 522 | 123 |
비교예 13 | CE13 | 5.61 | 4.9 | 476 | 115 |
비교예 14 | CE14 | 5.32 | 4.7 | 441 | 102 |
비교예 15 | CE15 | 5.44 | 4.1 | 395 | 95 |
Claims (14)
- 하기 화학식 1로 표시되는 화합물:[화학식 1]상기 화학식 1에 있어서,Cy1 내지 Cy4는 서로 같거나 상이하고, 각각 독립적으로 치환 또는 비치환된 탄화수소고리기이고,Y1 및 Y2는 서로 같거나 상이하고, 각각 독립적으로 O, S, Se 또는 NR이며,L은 치환 또는 비치환된 2가의 탄화수소고리기; 또는 치환 또는 비치환된 2가의 헤테로고리기이고,L1 내지 L4는 서로 같거나 상이하고, 각각 독립적으로 직접결합; 치환 또는 비치환된 아릴렌기; 또는 치환 또는 비치환된 헤테로아릴렌기이며,L10 및 L11은 서로 같거나 상이하고, 각각 독립적으로 치환 또는 비치환된 아릴렌기이고,X1 및 X2는 서로 같거나 상이하고, 각각 독립적으로 경화성기이며,R 및 R1 내지 R4는 서로 같거나 상이하고, 각각 독립적으로 수소; 중수소; 할로겐기; 치환 또는 비치환된 알킬기; 치환 또는 비치환된 알콕시기; 치환 또는 비치환된 아릴기; 또는 치환 또는 비치환된 헤테로아릴기이고,n1 및 n2는 각각 0 내지 4의 정수이고, n1 및 n2가 각각 2 이상인 경우 2 이상의 괄호 내의 치환기는 서로 같거나 상이하며,m1 및 m2는 각각 1 내지 5의 정수이고, n1+m1은 5 이하이며, n2+m2는 5 이하이고,n3 및 n4는 각각 1 내지 7의 정수이고, n3 및 n4가 각각 2 이상인 경우 2 이상의 괄호 내의 치환기는 서로 같거나 상이하다.
- 청구항 1에 있어서,상기 화학식 1은 하기 화학식 3인 것인 화합물:[화학식 3]상기 화학식 3에 있어서,Y1, Y2, L, L1 내지 L4, L10, L11, X1, X2, R1 내지 R4, n1 내지 n4, m1 및 m2의 정의는 화학식 1에서와 같고,R50 및 R51은 서로 같거나 상이하고, 각각 독립적으로 수소; 중수소; 할로겐기; 치환 또는 비치환된 알킬기; 치환 또는 비치환된 알콕시기; 치환 또는 비치환된 아릴기; 또는 치환 또는 비치환된 헤테로아릴기이거나, 인접하는 기와 결합하여 치환 또는 비치환된 고리를 형성하며,n50 및 n51은 각각 1 내지 7의 정수이고, n50 및 n51이 각각 2 이상인 경우 2 이상의 괄호 내의 치환기는 서로 같거나 상이하다.
- 청구항 1에 있어서,상기 L은 하기 구조 중 어느 하나인 것인 화합물:상기 구조에 있어서,R10 내지 R31은 서로 같거나 상이하고, 각각 독립적으로 수소; 중수소; 할로겐기; 치환 또는 비치환된 알킬기; 치환 또는 비치환된 알콕시기; 치환 또는 비치환된 아릴기; 또는 치환 또는 비치환된 헤테로아릴기이며,n10 내지 n21은 각각 1 내지 4의 정수이고, n22, n23, n28 및 n29는 각각 1 내지 3의 정수이며, n24 및 n25는 각각 1 내지 7의 정수이고, n26은 1 내지 8의 정수이며, n27은 1 내지 6의 정수이고, n10 내지 n29가 각각 2 이상인 경우 2 이상의 괄호 내의 치환기는 서로 같거나 상이하고,
- 청구항 1에 있어서,상기 L1 내지 L4는 서로 같거나 상이하고, 각각 독립적으로 직접결합; 또는 치환 또는 비치환된 C6-30의 아릴렌기인 것인 화합물.
- 청구항 1에 있어서,상기 R1 내지 R4는 서로 같거나 상이하고, 각각 독립적으로 수소; 중수소; 또는 치환 또는 비치환된 C1-30의 알킬기인 것인 화합물.
- 청구항 1에 있어서,상기 L10 및 L11은 서로 같거나 상이하고, 각각 독립적으로 치환 또는 비치환된 페닐렌기; 치환 또는 비치환된 바이페닐렌기; 치환 또는 비치환된 터페닐렌기; 또는 치환 또는 비치환된 나프틸렌기인 것인 화합물.
- 청구항 1 내지 9 중 어느 한 항에 따른 화합물을 포함하는 코팅 조성물.
- 제1 전극;제2 전극; 및상기 제1 전극과 상기 제2 전극 사이에 구비되는 1층 이상의 유기물층을 포함하고,상기 유기물층 중 1층 이상은 청구항 10의 코팅 조성물 또는 이의 경화물을 포함하는 것인 유기 발광 소자.
- 청구항 11에 있어서,상기 코팅 조성물 또는 이의 경화물을 포함하는 유기물층은 정공수송층, 정공주입층, 또는 정공수송 및 정공주입을 동시에 하는 층인 것인 유기 발광 소자.
- 제1 전극을 준비하는 단계;상기 제1 전극 상에 1층 이상의 유기물층을 형성하는 단계; 및상기 유기물층 상에 제2 전극을 형성하는 단계를 포함하고,상기 유기물층을 형성하는 단계는 청구항 10의 코팅 조성물을 이용하여 1층 이상의 유기물층을 형성하는 단계를 포함하는 것인 유기 발광 소자의 제조방법.
- 청구항 13에 있어서,상기 코팅 조성물을 이용하여 유기물층을 형성하는 단계는상기 코팅 조성물을 코팅하는 단계; 및상기 코팅된 코팅 조성물을 열처리 또는 광처리하는 단계를 포함하는 것인 유기 발광 소자의 제조 방법.
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WO2021154041A1 (ko) * | 2020-01-31 | 2021-08-05 | 주식회사 엘지화학 | 화합물, 이를 포함하는 코팅 조성물, 이를 이용한 유기 발광 소자 및 이의 제조방법 |
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CN106478566A (zh) * | 2016-09-27 | 2017-03-08 | 上海道亦化工科技有限公司 | 基于二苯并呋喃的有机电致发光化合物及其有机电致发光器件 |
KR20180092270A (ko) * | 2017-02-08 | 2018-08-17 | 주식회사 엘지화학 | 플루오렌계 화합물, 이를 이용한 유기 발광 소자 및 이의 제조방법 |
KR20190052258A (ko) * | 2017-11-08 | 2019-05-16 | 덕산네오룩스 주식회사 | 유기전기소자용 화합물을 이용한 유기전기소자 및 그 전자 장치 |
WO2021154041A1 (ko) * | 2020-01-31 | 2021-08-05 | 주식회사 엘지화학 | 화합물, 이를 포함하는 코팅 조성물, 이를 이용한 유기 발광 소자 및 이의 제조방법 |
CN111635384A (zh) * | 2020-07-03 | 2020-09-08 | 长春海谱润斯科技有限公司 | 一种芳胺类有机化合物及其有机发光器件 |
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