WO2021075775A1 - 유기 화합물 및 이를 포함하는 유기 전계 발광 소자 - Google Patents
유기 화합물 및 이를 포함하는 유기 전계 발광 소자 Download PDFInfo
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- WO2021075775A1 WO2021075775A1 PCT/KR2020/013567 KR2020013567W WO2021075775A1 WO 2021075775 A1 WO2021075775 A1 WO 2021075775A1 KR 2020013567 W KR2020013567 W KR 2020013567W WO 2021075775 A1 WO2021075775 A1 WO 2021075775A1
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- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
- 125000005557 thiazolylene group Chemical group 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 125000005730 thiophenylene group Chemical group 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 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
- 150000003918 triazines Chemical class 0.000 description 1
- 125000004306 triazinyl group Chemical group 0.000 description 1
- 238000001771 vacuum deposition 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
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 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
Classifications
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- C07D239/24—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
- 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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- 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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Definitions
- the present invention relates to a novel organic light-emitting compound and an organic electroluminescent device using the same, and more particularly, a compound having excellent electron transport ability and light-emitting ability, and by including the same in one or more organic material layers, characteristics such as luminous efficiency, driving voltage, and lifespan are improved. It relates to an improved organic electroluminescent device.
- organic electroluminescent (EL) devices hereinafter simply referred to as'organic EL devices'
- blue electroluminescence using an anthracene single crystal in 1965 starting from Bernanose's observation of organic thin-film emission in the 1950s, was conducted in 1987.
- An organic EL device having a stacked structure divided into a functional layer of a hole layer and a light emitting layer by (Tang) was presented. Since then, in order to make a high-efficiency, high-life organic EL device, it has developed in the form of introducing each characteristic organic material layer in the device, leading to the development of specialized materials used for this.
- the material used as the organic material layer may be classified into a light emitting material, a hole injection material, a hole transport material, an electron transport material, an electron injection material, and the like according to their function.
- Materials for forming a light-emitting layer of an organic EL device may be classified into blue, green, and red light-emitting materials according to light emission colors.
- yellow and orange light emitting materials are also used as light emitting materials to realize better natural colors.
- a host/dopant system may be used as a luminescent material.
- the dopant material can be divided into a fluorescent dopant using an organic material and a phosphorescent dopant using a metal complex compound containing heavy atoms such as Ir and Pt. Development of such a phosphorescent material can theoretically improve luminous efficiency up to four times as compared to fluorescence, and thus, attention is focused on phosphorescent host materials as well as phosphorescent dopants.
- NPB hole blocking layer
- BCP hole blocking layer
- Alq 3 and the like represented by the following formula
- anthracene derivatives are reported as fluorescent dopant/host materials as light emitting materials.
- metal complex compounds containing Ir such as Firpic, Ir(ppy) 3 and (acac)Ir(btp) 2 are blue, green, and red dopant materials. It is being used as.
- CBP has shown excellent properties as a phosphorescent host material.
- the existing materials have an advantage in terms of light emission characteristics, but the glass transition temperature is low and the thermal stability is very poor, so that the lifespan of the organic EL device is not satisfactory.
- An object of the present invention is to provide a novel compound that can be used as an organic material layer material of an organic electroluminescent device, specifically a light emitting layer material, an electron transport layer material, or an electron transport auxiliary layer material, etc., due to improved electron injection and transport ability and excellent luminescence ability. It is done.
- Another object of the present invention is to provide an organic electroluminescent device having a low driving voltage, high luminous efficiency, and a long lifespan, including the above-described novel compound.
- the present invention provides a compound represented by the following formula (1).
- a plurality of X is the same or different from each other, each independently C (R 1 ) or N, provided that at least two of the plurality of X are N,
- R 1 and R 2 are the same as or different from each other, and each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 to C 40 alkyl group, C 2 to C 40 alkenyl group, C 2 to C 40 Of alkynyl group, C 3 to C 40 cycloalkyl group, heterocycloalkyl group of 3 to 40 nuclear atoms, aryl group of C 6 to C 60 , heteroaryl group of 5 to 60 nuclear atoms, C 1 to C 40 Alkyloxy group, C 6 ⁇ C 60 aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 Arylborone group, C 6 ⁇ C 60 arylphosphanyl group, C 6 ⁇ C 60 monoarylphosfinyl group, C 6 ⁇ C 60 diarylphosfinyl group, C 6
- n is an integer from 0 to 4
- L is a single bond, or is selected from the group consisting of an arylene group of C 6 to C 18 and a heteroarylene group having 5 to 18 nuclear atoms,
- o is an integer from 0 to 3
- Ar 1 and Ar 2 are the same as or different from each other, and each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 to C 40 alkyl group, C 2 to C 40 alkenyl group, C 2 to C 40 Alkynyl group, C 3 ⁇ C 40 cycloalkyl group, 3 to 40 nuclear atoms heterocycloalkyl group, C 6 ⁇ C 60 aryl group, 5 to 60 nuclear atoms heteroaryl group, C 1 ⁇ C 40 alkyl Oxy group, C 6 ⁇ C 60 aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl Boron group, C 6 ⁇ C 60 arylphosphanyl group, C 6 ⁇ C 60 monoarylphosfinyl group, C 6 ⁇ C 60 diarylphosphinyl group, C 6 ⁇
- An arylene group and a heteroarylene group of L; Ar 1 to Ar 2 , and R 1 to R 2 of alkyl group, alkenyl group, alkynyl group, cycloalkyl group, heterocycloalkyl group, aryl group, heteroaryl group, alkyloxy group, aryloxy group, alkylsilyl group, arylsilyl group , Alkyl boron group, aryl boron group, arylphosphine group, arylphosphine oxide group, and arylamine group are each independently hydrogen, deuterium (D), halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 cycloalkyl group, heterocycloalkyl group of 3 to 40 nuclear atoms, C 6 ⁇ C 60 aryl group, 5 to nuclear atoms 60 heteroaryl
- n is 1 or more; Or at least one of the substituent of Ar 1 and the substituent of Ar 2 has a cyano group (-CN).
- the compound represented by Formula 1 may be used as a light emitting layer (specifically, a phosphorescent light emitting material), an electron transport layer, or a material for an electron transport auxiliary layer.
- a light emitting layer specifically, a phosphorescent light emitting material
- an electron transport layer or a material for an electron transport auxiliary layer.
- the present invention includes an anode, a cathode, and one or more organic material layers interposed between the anode and the cathode, and at least one of the one or more organic material layers is an organic electric field including a compound represented by the aforementioned formula (1). It provides a light emitting device.
- the compound represented by Formula 1 since the compound represented by Formula 1 has excellent carrier transport ability, luminescence ability, and thermal stability, it can be used as an organic material layer material of an organic electroluminescent device.
- an organic electroluminescent device comprising the compound of the present invention as a phosphorescent host, an electron transport layer, or an electron transport auxiliary layer material is greatly improved in terms of high thermal stability, low driving voltage, fast mobility, high current efficiency, and long life characteristics. As a result, it can be effectively applied to a full-color display panel with improved performance and lifetime.
- the compound represented by Formula 1 adopts a core substituted with an aliphatic cyclic group, such as a hexagonal cyclohexyl group at position 9 of fluorene, and has excellent electron transport ability to the core.
- Two electron withdrawing groups (EWG) for example, a nitrogen-containing heteroaromatic ring (eg, a azine such as pyrimidine and triazine) and a cyano group (-CN) are bonded to form a basic skeleton.
- Such a cyclohexyl fluorene-based core is substituted with a chemically and physically stable cycloalkyl group to increase the stability of the molecular structure, thereby contributing to high efficiency and long life characteristics. Accordingly, it is superior in terms of glass transition temperature (Tg) by securing more structural and thermal stability than a conventional structure in which an alkyl group or an aryl group is substituted at position 9 of fluorene.
- Tg glass transition temperature
- aliphatic cyclic groups such as cyclohexyl groups have a chair foam, they form a uniform morphology and are excellent in device characteristics.
- the compound of Formula 1 is a nitrogen-containing heteroaromatic ring in which a fluorene-based core having an electron donor (EDG) characteristic is an electron withdrawing group (EWG1) having high electron absorption through a linker (L) (e.g., X-containing ring), but with a strong electron attracting group (EWG2), a cyano group (-CN) bonded directly to the phenyl ring on the other side of the fluorene-based core.
- EWG1 electron donor
- L linker
- EWG2 strong electron attracting group
- -CN cyano group
- the compound of Formula 1 When the compound of Formula 1 is applied as a material for the electron transport layer or the electron transport auxiliary layer, electrons can be well received from the cathode, so that electrons can be smoothly transferred to the light emitting layer, lower the driving voltage of the device, and induce high efficiency and long life. It can maximize the performance of a full-color organic light-emitting panel. Accordingly, when the compound of Formula 1 is applied to an organic electroluminescent device, excellent thermal stability and carrier transport capability (especially, electron transport capability and luminescence capability) can be expected, as well as driving voltage, efficiency, and lifetime of the device. It is possible to improve the high triplet energy (T1), as the latest ETL material, can exhibit excellent efficiency increase due to the TTF (triplet-triplet fusion) effect.
- T1 triplet energy
- the compound represented by Formula 1 of the present invention is bonded to a fluorene-based core structure in which at least one cyano group (-CN) having strong electron attracting ability is directly bonded through a linker (L) to provide a wider band gap. It can have a value, and it is easy to adjust the HOMO and LUMO energy levels according to the direction or position of the substituent. High electron transport properties can be exhibited in an organic electroluminescent device using such a compound.
- the compound represented by Formula 1 of the present invention has a high triplet energy (T1), it is possible to prevent the excitons generated in the light emitting layer from diffusing (migrating) to the adjacent electron transport layer or hole transport layer. . Accordingly, the number of excitons contributing to light emission in the light emitting layer is increased, so that the luminous efficiency of the device can be improved, durability and stability of the device are improved, so that the life of the device can be efficiently increased. Most of the developed materials are capable of low voltage driving and thus exhibit physical characteristics that improve the lifespan.
- di As a substituent (eg, Ar 1 to Ar 2 ) introduced into the linker (L) and/or the nitrogen-containing aromatic ring, di It may contain at least one or more benzo-based moieties (eg, fluorene group, carbazolylene group, dibenzofuran (DBF) or dibenzothiophene (DBT), etc.). It can be applied as a green phosphorescent material having excellent luminous efficiency characteristics through a combination of such a dibenzo-based moiety with a nitrogen-containing heteroaromatic ring (eg, pyrimidine, pyrazine, triazine), which is a strong EWG. In addition, it is possible to drive a low voltage, thereby exhibiting an effect of increasing the lifespan, and excellent device characteristics due to thermal stability, high glass transition temperature characteristics, and uniform morphology.
- a substituent eg, Ar 1 to Ar 2
- di may contain at least one or more benzo-based moieties (eg, fluorene group, carb
- the compound represented by Formula 1 of the present invention is an organic material layer material of an organic electroluminescent device, preferably a light-emitting layer material (a blue phosphorescent host material), an electron transport layer/injection layer material, a light-emitting auxiliary layer material, and an electron transport auxiliary material. It can be used as a layer material, more preferably a light-emitting layer material, an electron transport layer material, and an electron transport auxiliary layer material.
- the performance and lifespan characteristics of the organic electroluminescent device including the compound of the above formula can be greatly improved, and the performance of a full-color organic light-emitting panel to which such an organic electroluminescent device is applied can also be maximized.
- two electron withdrawing groups having excellent electron transport ability are introduced into the core structure in which a cyclohexyl group is introduced at position 9 of fluorene.
- a nitrogen-containing heteroaromatic ring e.g., an X-containing ring
- L linker
- a cyano group is connected to the phenyl ring on the other side of the fluorene-based core.
- At least one cyano group (-CN) and R 2 may each be introduced into the fluorene core into which an aliphatic cyclic group, specifically a hexagonal cyclohexyl group is introduced.
- R 2 are the same or different from each other, and each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 to C 40 alkyl group, C 2 to C 40 alkenyl group, C 2 to C 40 alky Nyl group, C 3 ⁇ C 40 cycloalkyl group, 3 to 40 nuclear atoms heterocycloalkyl group, C 6 ⁇ C 60 aryl group, 5 to 60 nuclear atoms heteroaryl group, C 1 ⁇ C 40 alkyl jade Group, C 6 ⁇ C 60 aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron Group, C
- R 2 is the same as or different from each other, and each independently selected from the group consisting of hydrogen, a C 1 to C 40 alkyl group, a C 6 to C 60 aryl group, and a heteroaryl group having 5 to 60 nuclear atoms It is desirable to be.
- n may be an integer from 0 to 4.
- R 2 is hydrogen
- R 2 may have the aforementioned substituents excluding hydrogen.
- the number (m) of cyano groups substituted in the cyclohexyl fluorene-based core is not particularly limited, and is an integer of 0 to 2 as an example, and may be specifically 0 or 1. At this time, when m is 0, at least one of the substituents of Ar 1 and Ar 2 to be described later has a cyano group.
- the cyclohexyl fluorene-based core may be embodied by the following structural formula at the substitution position of the cyano group.
- the cyclohexyl fluorene-based core may be embodied in the following structural formula depending on the bonding position with a linker (eg, L) to be described later.
- a linker eg, L
- the wavy part means a part in which a linker (L) and a bond are formed in Chemical Formula 1.
- at least one or more of the aforementioned R 2 may be introduced, and a polycyclic structure in which fluorene and R 2 are condensed also belong to the scope of the present invention.
- L may be a conventional divalent linker known in the art.
- each L may be independently a single bond, or may be selected from the group consisting of an arylene group of C 6 to C 18 and a heteroarylene group having 5 to 18 nuclear atoms.
- the number of L (eg, o) may be 0 to 3.
- o when o is 0, it may be a single bond, and when o is 1 to 3, a plurality of L may be the same as or different from each other.
- L may be a single bond, or may have at least one of an arylene group moiety represented by Formula 2 below and a dibenzo-based moiety represented by Formula 3.
- Y is selected from the group consisting of C(R 3 ) 2 , NR 3 , O, S and Se,
- R 3 is the same as or different from each other, and each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 to C 40 alkyl group, C 2 to C 40 alkenyl group, C 2 to C 40 alkynyl group , C 3 ⁇ C 40 cycloalkyl group, 3 to 40 nuclear atoms heterocycloalkyl group, C 6 ⁇ C 60 aryl group, 5 to 60 nuclear atoms heteroaryl group, C 1 ⁇ C 40 alkyloxy group , C 6 ⁇ C 60 aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group , C 6 ⁇ C 60 arylphosphanyl group, C 6 ⁇ C 60 monoarylphosfinyl group, C 6 ⁇ C 60 diarylphosfinyl group, C 6
- n is an integer of 1 to 3.
- the moiety of Formula 2 may be an arylene group linker known in the art, and specific examples thereof include a phenylene group, a biphenylene group, a naphthylene group, an anthracenylene group, an indenylene group, a pyrantrenylene group, and a carbazolyl Ethylene group, thiophenylene group, indolylene group, furinylene group, quinolinylene group, pyrrolylene group, imidazolylene group, oxazolylene group, thiazolylene group, pyridinylene group, pyrimidinylene group, and the like.
- the linker (L) represented by Chemical Formula 2 is preferably a phenylene group or a biphenylene group.
- the linker of Formula 2 may be a linker selected from the following structural formulas.
- the linker of Formula 3 may be a dibenzo-based moiety known in the art.
- the dibenzo-based moiety represented by Chemical Formula 3 may be further specified by the following structural formula.
- R 3 is the same as or different from each other, and each independently hydrogen, a C 1 to C 40 alkyl group, a C 6 to C 60 aryl group, a heteroaryl group having 5 to 60 nuclear atoms, and a C 6 to C 60 It is selected from the group consisting of arylamine groups. Specifically, R 3 may be the same as or different from each other, and may each independently be an aryl group of C 6 to C 60 , or a heteroaryl group having 5 to 60 nuclear atoms.
- Linker (L) represented by the above-described Formulas 2 and 3 is not specifically represented in the formula, but at least one or more substituents (eg, R 2) known in the art may be substituted.
- the compound represented by Chemical Formula 1 of the present invention is an electron withdrawing group (EWG) having excellent electron transport capability through a direct bond or linker (L) to the phenyl ring on one side of the fluorene-based core in which a cyclohexyl group is introduced at position 9
- EWG electron withdrawing group
- L linker
- a nitrogen-containing heteroaromatic ring eg, an X-containing ring
- a plurality of Xs are the same as or different from each other, and each independently C(R 1 ) or N, provided that at least two of the plurality of Xs are N.
- the number of nitrogen (N) included in the plurality of X may be 2 to 3.
- These triazines and pyrimidines are a kind of 6-membered heterocycle with excellent electron withdrawing group (EWG) properties, respectively, and thus have strong electron-receiving properties.
- Ar 1 and Ar 2 are the same as or different from each other, and each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 to C 40 alkyl group, C 2 to C 40 alkenyl group, C 2 to C 40 Alkynyl group, C 3 ⁇ C 40 cycloalkyl group, 3 to 40 nuclear atoms heterocycloalkyl group, C 6 ⁇ C 60 aryl group, 5 to 60 nuclear atoms heteroaryl group, C 1 ⁇ C 40 alkyl Oxy group, C 6 ⁇ C 60 aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl Boron group, C 6 ⁇ C 60 arylphosphanyl group, C 6 ⁇ C 60 monoarylphosfinyl group, C 6 ⁇ C 60 diarylphosphinyl group, C 6 ⁇
- Ar 1 and Ar 2 are the same or different from each other, and each independently is preferably selected from the group consisting of an aryl group of C 6 to C 60 and a heteroaryl group having 5 to 60 nuclear atoms. More specifically, at least one of Ar 1 and Ar 2 is a C 6 to C 18 aryl group, and the aryl group may be substituted with a heteroaromatic ring containing at least one nitrogen.
- the number of nitrogen contained in the heteroaromatic ring is not particularly limited, and may be 1 to 3 as an example.
- Such a nitrogen-containing heteroaromatic ring (eg, an X-containing ring) may be embodied in any one of the following formulas A-1 to A-3.
- R 1 , Ar 1 and Ar 2 are each as defined in Formula 1.
- R 1 , Ar 1 and Ar 2 are also within the scope of the present invention.
- Alkylsilyl group, arylsilyl group, alkyl boron group, aryl boron group, arylphosphine group, arylphosphine oxide group, and arylamine group are each independently hydrogen, deuterium (D), halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 to C 40 alkenyl group, C 2 to C 40 alkynyl group, C 3 to C 40 cycloalkyl group, 3 to 40 nuclear atom heterocycloalkyl group, C 6 to C 60 aryl Group, a heteroaryl group having 5 to 60 nuclear atoms, a C 1 to C 40 alkyloxy group
- the compound represented by Formula 1 is any of the following Formulas 4 to 7 depending on the bonding position of the cyano group (-CN) directly connected to the cyclohexyl fluorene-based core.
- -CN cyano group
- X, L, Ar 1 , Ar 2 , L, R 2 , n and o are each as defined in Formula 1.
- the compound represented by Formula 1 is more than any one of the following Formulas 8 to 11, depending on the bonding position of the linker (L) connected to the cyclohexyl fluorene-based core. It can be embodied. However, it is not limited thereto.
- X, L, Ar 1 , Ar 2 , L, R 2 , m, n and o are each as defined in Formula 1.
- L is a single bond or is selected from the group consisting of a C 6 to C 18 arylene group and a heteroarylene group having 5 to 18 nuclear atoms, and o is an integer of 0 to 3.
- R 1 and R 2 are the same as or different from each other, each independently selected from the group consisting of hydrogen, a C 6 ⁇ C 60 aryl group, and a heteroaryl group having 5 to 60 nuclear atoms, m is 0 or 1 , n is an integer of 0 to 4.
- the arylene group of L, the heteroarylene group; And the alkyl group, aryl group, and heteroaryl group of R 1 to R 2 are each independently hydrogen, deuterium (D), halogen, cyano group, nitro group, C 1 to C 40 alkyl group, C 6 to C 60 aryl group, It may be substituted with one or more substituents selected from the group consisting of a heteroaryl group of 5 to 60 nuclear atoms and an arylamine group of C 6 to C 60 , and in this case, when the substituents are plural, they may be the same or different from each other. .
- the compound represented by Formula 1 may include a linker (L); And according to the type of Ar 1 and Ar 2 introduced into the nitrogen-containing aromatic ring may be more specific to any one of Formulas 12 to 15 described later.
- X, Y, Ar 1 , Ar 2 , R 2 , m and n are each as defined in Formula 1.
- the compound represented by any one of Formulas 12 to 15 may include a substituent of a cyclohexyl fluorene-based core; And/or as a substituent of a nitrogen-containing heteroaromatic ring (eg, an X-containing ring), at least one cyano group (-CN) is included.
- X, Y, Ar 1 , Ar 2 and n are each as defined in Formula 1.
- a cyano group is substituted on at least one of Ar 1 and Ar 2 of a nitrogen-containing heteroaromatic ring (eg, an X-containing ring)
- a nitrogen-containing heteroaromatic ring eg, an X-containing ring
- X, Y, Ar 1 , and n are each as defined in Formula 1.
- alkyl group, aryl group and heteroaryl group of R 3 are each independently hydrogen, deuterium (D), halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 6 ⁇ C 60 of the aryl group, an aryl nuclear atoms of 5 to 60 heteroaryl group, may be substituted by one or more substituents selected from the group consisting of an aryl amine of the C 6 ⁇ C 60.
- a structure in which a cyano group is substituted in any one of a cyclohexyl fluorene-based core and a nitrogen-containing heteroaromatic ring has been described in detail.
- the present invention is not limited thereto, and a compound in which a plurality of cyano groups are substituted on both the cyclohexyl fluorene-based core and the nitrogen-containing heteroaromatic ring also belongs to the scope of the present invention.
- the compound represented by Chemical Formula 1 of the present invention described above may be further embodied as a compound exemplified below, for example, a compound represented by A-1 to C-117.
- the compound represented by Chemical Formula 1 of the present invention is not limited by those exemplified below.
- alkyl refers to a monovalent substituent derived from a linear or branched saturated hydrocarbon having 1 to 40 carbon atoms. Examples thereof include, but are not limited to, methyl, ethyl, propyl, isobutyl, sec-butyl, pentyl, iso-amyl, hexyl, and the like.
- alkenyl refers to a monovalent substituent derived from a straight or branched unsaturated hydrocarbon having 2 to 40 carbon atoms having one or more carbon-carbon double bonds. Examples thereof include vinyl (vinyl), allyl (allyl), isopropenyl (isopropenyl), 2-butenyl (2-butenyl), and the like, but is not limited thereto.
- alkynyl refers to a monovalent substituent derived from a straight or branched unsaturated hydrocarbon having 2 to 40 carbon atoms having at least one carbon-carbon triple bond. Examples thereof include, but are not limited to, ethynyl and 2-propynyl.
- aryl refers to a monovalent substituent derived from an aromatic hydrocarbon having 6 to 40 carbon atoms in which a single ring or two or more rings are combined.
- a form in which two or more rings are simply attached to each other or condensed may be included. Examples of such aryl include, but are not limited to, phenyl, naphthyl, phenanthryl, and anthryl.
- heteroaryl refers to a monovalent substituent derived from a monoheterocyclic or polyheterocyclic aromatic hydrocarbon having 5 to 40 nuclear atoms. At this time, at least one carbon, preferably 1 to 3 carbons in the ring is substituted with a heteroatom such as N, O, S or Se.
- a form in which two or more rings are simply attached to each other or condensed may be included, and further, a form condensed with an aryl group may be included.
- heteroaryl examples include 6-membered monocyclic rings such as pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, and triazinyl, phenoxathienyl, indolizinyl, indolyl ( indolyl), purinyl, quinolyl, benzothiazole, polycyclic rings such as carbazolyl and 2-furanyl, N-imidazolyl, 2-isoxazolyl , 2-pyridinyl, 2-pyrimidinyl, and the like, but are not limited thereto.
- aryloxy is a monovalent substituent represented by RO-, and R means an aryl having 5 to 40 carbon atoms. Examples of such aryloxy include, but are not limited to, phenyloxy, naphthyloxy, and diphenyloxy.
- alkyloxy is a monovalent substituent represented by R'O-, wherein R'refers to alkyl having 1 to 40 carbon atoms, and has a linear, branched, or cyclic structure It may include.
- R' refers to alkyl having 1 to 40 carbon atoms, and has a linear, branched, or cyclic structure It may include.
- alkyloxy include, but are not limited to, methoxy, ethoxy, n-propoxy, 1-propoxy, t-butoxy, n-butoxy, pentoxy, and the like.
- arylamine refers to an amine substituted with an aryl group having 6 to 40 carbon atoms, and at this time, there are at least two aryl groups, and may be the same or different from each other.
- heteroarylarylamine refers to an amine substituted with an aryl group having 6 to 40 carbon atoms and a heteroaryl group having 5 to 40 nuclear atoms.
- heteroarylamine refers to an amine substituted with a heteroaryl group having at least two nuclear atoms of 5 to 40, and the heteroaryl groups may be the same or different from each other.
- cycloalkyl refers to a monovalent substituent derived from a monocyclic or polycyclic non-aromatic hydrocarbon having 3 to 40 carbon atoms.
- examples of such cycloalkyl include, but are not limited to, cyclopropyl, cyclopentyl, cyclohexyl, norbornyl, and adamantine.
- heterocycloalkyl refers to a monovalent substituent derived from a non-aromatic hydrocarbon having 3 to 40 nuclear atoms, and at least one carbon in the ring, preferably 1 to 3 carbons, is N, O, S Or a hetero atom such as Se.
- heterocycloalkyl include, but are not limited to, morpholine, piperazine, and the like.
- alkylsilyl refers to silyl substituted with alkyl having 1 to 40 carbon atoms
- arylsilyl refers to silyl substituted with aryl having 5 to 40 carbon atoms.
- condensed ring means a condensed aliphatic ring, a condensed aromatic ring, a condensed heteroaliphatic ring, a condensed heteroaromatic ring, or a combination thereof.
- the present invention provides an electron transport layer comprising the compound represented by Chemical Formula 1.
- the electron transport layer serves to move electrons injected from the cathode to an adjacent layer, specifically a light emitting layer.
- the compound represented by Formula 1 may be used alone as an electron transport layer (ETL) material, or may be mixed with an electron transport layer material known in the art. It is preferably used alone.
- ETL electron transport layer
- the electron transport layer material that can be mixed with the compound of Formula 1 includes an electron transport material commonly known in the art.
- electron transport materials that can be used include oxazole-based compounds, isoxazole-based compounds, triazole-based compounds, isothiazole-based compounds, oxadiazole-based compounds, thiadiazole-based compounds, and perylene ( perylene) compounds, aluminum complexes (e.g. Alq 3 (tris(8-quinolinolato)-aluminium) BAlq, SAlq, Almq3, gallium complexes (e.g. Gaq'2OPiv, Gaq) There are '2OAc, 2(Gaq'2)), etc. These may be used alone or two or more types may be used in combination.
- the mixing ratio thereof is not particularly limited, and may be appropriately adjusted within a range known in the art.
- the present invention provides an auxiliary electron transport layer comprising the compound represented by the formula (1).
- the electron transport layer is disposed between the light emitting layer and the electron transport layer, and serves to prevent diffusion of excitons or holes generated in the light emitting layer into the electron transport layer.
- the compound represented by Formula 1 may be used alone as an electron transport auxiliary layer material, or may be mixed with an electron transport layer material known in the art. It is preferably used alone.
- the electron transport auxiliary layer material that can be mixed with the compound of Formula 1 includes an electron transport material commonly known in the art.
- the electron transport auxiliary layer may include an oxadiazole derivative, a triazole derivative, a phenanthroline derivative (eg, BCP), a heterocyclic derivative containing nitrogen, and the like.
- the mixing ratio thereof is not particularly limited, and may be appropriately adjusted within a range known in the art.
- organic electroluminescent device including the compound represented by Formula 1 according to the present invention.
- the present invention is an organic electroluminescent device comprising an anode, a cathode, and one or more organic material layers interposed between the anode and the cathode, wherein at least one of the one or more organic material layers It includes a compound represented by Formula 1 above.
- the compounds may be used alone or in combination of two or more.
- the one or more organic material layers may be any one or more of a hole injection layer, a hole transport layer, an emission layer, a light emission auxiliary layer, an electron transport layer, an electron transport auxiliary layer, and an electron injection layer, of which at least one organic material layer is represented by Formula 1 above.
- a hole injection layer a hole transport layer, an emission layer, a light emission auxiliary layer, an electron transport layer, an electron transport auxiliary layer, and an electron injection layer, of which at least one organic material layer is represented by Formula 1 above.
- the organic material layer containing the compound of Formula 1 is preferably a light emitting layer (more specifically, a phosphorescent host material), an electron transport layer, and an electron transport auxiliary layer.
- the emission layer of the organic electroluminescent device according to the present invention includes a host material and a dopant material, and in this case, the compound of Formula 1 may be included as a host material.
- the light emitting layer of the present invention may include a compound known in the art other than the compound of Formula 1 as a host.
- the compound represented by Formula 1 is included as a material for an emission layer of an organic electroluminescent device, preferably a phosphorescent host material of blue, green, and red, since the bonding force between holes and electrons in the emission layer is increased, the efficiency of the organic electroluminescent device (Light emission efficiency and power efficiency), lifespan, luminance, and driving voltage can be improved.
- the compound represented by Formula 1 is preferably included in an organic electroluminescent device as a green and/or red phosphorescent host, a fluorescent host, or a dopant material.
- the compound represented by Formula 1 of the present invention is a green phosphorescent exciplex N-type host material of a light emitting layer having high efficiency.
- the structure of the organic electroluminescent device of the present invention is not particularly limited, but may have a structure in which a substrate, an anode, a hole injection layer, a hole transport layer, an auxiliary light emitting layer, a light emitting layer, an electron transport layer, and a cathode are sequentially stacked.
- at least one of the hole injection layer, the hole transport layer, the light emission auxiliary layer, the light emitting layer, the electron transport layer and the electron injection layer may include the compound represented by Formula 1, preferably a light emitting layer, more preferably a phosphorescent host May include a compound represented by Formula 1 above.
- an electron injection layer may be additionally stacked on the electron transport layer.
- the structure of the organic electroluminescent device of the present invention may be a structure in which an insulating layer or an adhesive layer is inserted at an interface between an electrode and an organic material layer.
- the organic electroluminescent device of the present invention can be manufactured by forming an organic material layer and an electrode using materials and methods known in the art, except that at least one of the above-described organic material layers contains the compound represented by Chemical Formula 1. have.
- the organic material layer may be formed by a vacuum deposition method or a solution coating method.
- the solution coating method include, but are not limited to, spin coating, dip coating, doctor blading, inkjet printing, or thermal transfer method.
- the substrate used in manufacturing the organic electroluminescent device of the present invention is not particularly limited, and for example, a silicon wafer, quartz, glass plate, metal plate, plastic film and sheet, and the like may be used.
- a cathode material a cathode material known in the art may be used without limitation.
- metals such as vanadium, chromium, copper, zinc, gold, or alloys thereof;
- Metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), and indium zinc oxide (IZO);
- Combinations of metals and oxides such as ZnO:Al or SnO 2 :Sb;
- Conductive polymers such as polythiophene, poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDT), polypyrrole or polyaniline;
- carbon black but is not limited thereto.
- a negative electrode material a negative electrode material known in the art may be used without limitation.
- metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, or lead, or alloys thereof;
- a multilayered material such as LiF/Al or LiO2/Al, but is not limited thereto.
- the hole injection layer, the hole transport layer, the electron injection layer and the electron transport layer are not particularly limited, and conventional materials known in the art may be used without limitation.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent from the filtered organic layer, the target compound, 2-([1,1'-biphenyl]-4-yl)-4-chloro-6-(dibenzo[b,d]furan-3, was used by column chromatography. -yl)-1,3,5-triazine (71.80 g, yield 72%) was obtained.
- the target compound 2-chloro-4-(dibenzo[b,d]furan-3-yl)-6-(naphthalen-2-yl)-1,3 was used by column chromatography. ,5-triazine (73.86 g, yield 72%) was obtained.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent from the filtered organic layer, the target compound, 2-(4-chlorophenyl)-4-(dibenzo[b,d]furan-3-yl)-6-(naphthalen-2-yl) was used by column chromatography. -1,3,5-triazine (59.33 g, yield 72%) was obtained.
- the target compound 4-(8-chlorodibenzo[b,d]furan-4-yl)-2,6-diphenylpyrimidine (61.04 g, yield 72%) was obtained by column chromatography. .
- the target compound 4-(8-chlorodibenzo[b,d]furan-4-yl)-6-(dibenzo[b,d]furan-3-yl), was used by column chromatography. -2-phenylpyrimidine (73.29 g, yield 72%) was obtained.
- the target compound 2-(8-chlorodibenzo[b,d]furan-4-yl)-4-(dibenzo[b,d]furan-3-yl), was used by column chromatography. -6-phenyl-1,3,5-triazine (73.22 g, yield 72%) was obtained.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound A-2 (13.22g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound A-5 (15.27g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound A-17 (13.44g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound A-18 (15.27g, yield 72%) was obtained by column chromatography.
- the target compound A-19 (15.27g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound A-22 (17.07g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound A-44 (12.84g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound B-17 (13.41g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound B-18 (15.24g, yield 72%) was obtained by column chromatography.
- the target compound B-35 (15.25g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound B-67 (15.60g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound B-362 (22.39g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound B-363 (16.55g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound B-365 (15.91g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound B-370 (15.93g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound C-97 (16.43g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound, C-99 (18.24g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound, C-101 (16.43g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent of the filtered organic layer, the target compound, C-103 (18.24g, yield 72%) was obtained by column chromatography.
- the mixture was extracted with methylene chloride, and MgSO 4 was added thereto, followed by filtering. After removing the solvent in the filtered organic layer, the target compound C-117 (18.57g, yield 72%) was obtained by column chromatography.
- the glass substrate coated with ITO Indium tin oxide
- ITO Indium tin oxide
- a solvent such as isopropyl alcohol, acetone, methanol, etc.
- UV OZONE cleaner Power sonic 405, Hwashin Tech
- a green organic EL device of Comparative Example 1 was manufactured in the same manner as in Example 1, except that CBP was used instead of Compound A-1 as a light emitting host material when forming the emission layer.
- the green organic EL device of Comparative Example 2 was manufactured in the same manner as in Example 1, except that Compound A was used instead of Compound A-1 as the light emitting host material when forming the emission layer.
- the green organic EL device of Comparative Example 3 was manufactured in the same manner as in Example 1, except that Compound B was used instead of Compound A-1 as a light emitting host material when forming the emission layer.
- the green organic EL device of Comparative Example 4 was manufactured in the same manner as in Example 1, except that Compound C was used instead of Compound A-1 as the light emitting host material when forming the emission layer.
- the green organic EL device of Comparative Example 5 was manufactured in the same manner as in Example 1, except that Compound D was used instead of Compound A-1 as the light emitting host material when forming the emission layer.
- the green organic electric field of Examples 1 to 6 using the compounds A-1, A-5, A-17, B-2, B-17, and B-35 according to the present invention as a light emitting layer The light emitting device includes a green organic EL device of Comparative Example 1 using conventional CBP; And when compared with the green organic electroluminescent devices of Comparative Examples 2 to 5 using compounds A to D containing no cyano group as the light emitting layer material, respectively, it can be seen that the device exhibits better performance in terms of efficiency and driving voltage. there was.
- the glass substrate coated with ITO Indium tin oxide
- ITO Indium tin oxide
- a solvent such as isopropyl alcohol, acetone, methanol, etc.
- UV OZONE cleaner Power sonic 405, Hwashin Tech
- a blue organic electroluminescent device of Comparative Example 6 was manufactured in the same manner as in Example 7, except that Alq3 was used instead of Compound A-3 as the electron transport layer material.
- a blue organic electroluminescent device of Comparative Example 7 was manufactured in the same manner as in Example 7 except that Compound A was used instead of Compound A-3 as the electron transport layer material.
- a blue organic electroluminescent device of Comparative Example 8 was manufactured in the same manner as in Example 7 except that Compound B was used instead of Compound A-3 as the electron transport layer material.
- a blue organic electroluminescent device of Comparative Example 9 was manufactured in the same manner as in Example 7 except that Compound C was used instead of Compound A-3 as the electron transport layer material.
- a blue organic electroluminescent device of Comparative Example 10 was manufactured in the same manner as in Example 7 except that Compound D was used instead of Compound A-3 as the electron transport layer material.
- a blue organic electroluminescent device of Comparative Example 11 was manufactured in the same manner as in Example 7 except that Compound A-3 was not included as an electron transport layer material.
- NPB, ADN, Alq 3 and compounds A to D used in Examples 7 to 21 and Comparative Examples 6 to 11 are as follows, respectively.
- the blue organic electroluminescent device of Examples 7 to 21 using the compound of the present invention as an electron transport layer material is the blue organic electroluminescent device of Comparative Example 6 using Alq 3 as an electron transport layer material. ; And blue organic electroluminescent devices of Comparative Examples 7 to 10 each using compounds A to D containing no cyano group as an electron transport layer material; And compared with the blue organic electroluminescent device of Comparative Example 11 that does not include an electron transport layer, it was found that more excellent performance in terms of driving voltage, emission peak, and current efficiency of the device.
- the glass substrate coated with ITO Indium tin oxide
- ITO Indium tin oxide
- a solvent such as isopropyl alcohol, acetone, methanol, etc.
- UV OZONE cleaner Power Sonic 405, Hwashin Tech
- NPB, ADN, Alq 3 and compounds A to D used at this time are as follows, respectively.
- Example 22 In the same manner as in Example 22, except that the compound A-2 used as the electron transport auxiliary layer material in Example 22 was not used, and the electron transport layer material Alq 3 was deposited at 30 nm instead of 25 nm.
- the blue organic electroluminescent device of Comparative Example 12 was manufactured.
- a blue organic electroluminescent device of Comparative Example 13 was manufactured in the same manner as in Example 17, except that Compound A was used instead of Compound A-2 used as the electron transport auxiliary layer material in Example 22.
- a blue organic electroluminescent device of Comparative Example 14 was manufactured in the same manner as in Example 17, except that Compound B was used instead of Compound A-2 used as the electron transport auxiliary layer material in Example 22.
- a blue organic electroluminescent device of Comparative Example 15 was manufactured in the same manner as in Example 17, except that Compound C was used instead of Compound A-2 used as the electron transport auxiliary layer material in Example 22.
- a blue organic electroluminescent device of Comparative Example 16 was manufactured in the same manner as in Example 17, except that Compound D was used instead of Compound A-2 used as the electron transport auxiliary layer material in Example 22.
- the compounds A to D containing cyano groups were used as electron transport auxiliary layer materials, respectively.
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Abstract
Description
샘플 | 호스트 | 구동 전압 (V) |
EL 피크 (nm) |
전류효율 (cd/A) |
실시예 1 | A-1 | 5.43 | 515 | 44.2 |
실시예 2 | A-5 | 5.53 | 516 | 42.3 |
실시예 3 | A-17 | 5.44 | 518 | 49.2 |
실시예 4 | B-2 | 5.53 | 517 | 44.8 |
실시예 5 | B-17 | 5.34 | 516 | 45.2 |
실시예 6 | B-35 | 5.69 | 516 | 43.6 |
비교예 1 | CBP | 6.52 | 516 | 38.2 |
비교예 2 | A | 6.53 | 517 | 37.2 |
비교예 3 | B | 6.51 | 516 | 36.3 |
비교예 4 | C | 6.55 | 515 | 38.2 |
비교예 5 | D | 6.47 | 514 | 37.9 |
샘플 | 전자수송층 재료 |
구동 전압 (V) |
EL 피크 (nm) |
전류효율 (cd/A) |
실시예 7 | A-3 | 3.6 | 456 | 6.6 |
실시예 8 | A-44 | 3.7 | 456 | 6.5 |
실시예 9 | A-57 | 3.7 | 458 | 6.6 |
실시예 10 | B-50 | 4.1 | 453 | 6.5 |
실시예 11 | B-67 | 3.8 | 456 | 6.8 |
실시예 12 | B-82 | 4.0 | 457 | 6.6 |
실시예 13 | B-362 | 3.6 | 455 | 6.6 |
실시예 14 | B-363 | 3.8 | 457 | 6.6 |
실시예 15 | B-365 | 4.0 | 452 | 6.4 |
실시예 16 | B-370 | 3.7 | 456 | 6.8 |
실시예 17 | C-97 | 3.7 | 456 | 6.7 |
실시예 18 | C-99 | 3.9 | 456 | 6.6 |
실시예 19 | C-101 | 3.8 | 456 | 6.5 |
실시예 20 | C-103 | 3.7 | 458 | 6.5 |
실시예 21 | C-117 | 4.0 | 452 | 6.4 |
비교예 6 | Alq3 | 4.7 | 459 | 5.6 |
비교예 7 | A | 4.8 | 458 | 5.4 |
비교예 8 | B | 4.7 | 459 | 5.5 |
비교예 9 | C | 4.9 | 458 | 5.6 |
비교예 10 | D | 4.8 | 457 | 5.5 |
비교예 11 | - | 4.8 | 460 | 6.2 |
샘플 | 전자수송 보조층 |
구동 전압 (V) |
발광 피크 (nm) |
전류효율 (cd/A) |
실시예 22 | A-2 | 3.5 | 450 | 8.5 |
실시예 23 | A-18 | 3.6 | 450 | 8.8 |
실시예 24 | A-19 | 3.2 | 452 | 8.6 |
실시예 25 | A-22 | 3.8 | 451 | 9.0 |
실시예 26 | A-33 | 3.6 | 450 | 9.2 |
실시예 27 | A-35 | 4.0 | 450 | 8.5 |
실시예 28 | A-46 | 3.8 | 452 | 8.3 |
실시예 29 | A-51 | 3.3 | 452 | 8.6 |
실시예 30 | B-1 | 3.8 | 451 | 9.0 |
실시예 31 | B-18 | 3.6 | 450 | 9.2 |
실시예 32 | B-33 | 4.0 | 450 | 8.5 |
실시예 33 | B-34 | 3.8 | 452 | 8.4 |
실시예 34 | B-49 | 3.5 | 450 | 8.6 |
실시예 35 | B-83 | 3.5 | 450 | 8.8 |
실시예 36 | B-88 | 3.3 | 452 | 8.6 |
실시예 37 | B-89 | 3.4 | 452 | 8.9 |
비교예 38 | - | 4.8 | 457 | 5.8 |
비교예 13 | A | 4.7 | 456 | 6.0 |
비교예 14 | B | 4.8 | 455 | 5.9 |
비교예 15 | C | 4.9 | 454 | 5.8 |
비교예 16 | D | 4.6 | 455 | 5.9 |
Claims (17)
- 하기 화학식 1로 표시되는 화합물:상기 화학식 1에서,복수의 X는 서로 동일하거나 또는 상이하며, 각각 독립적으로 C(R1) 또는 N이고, 다만 복수의 X 중 적어도 2개는 N이며,R1 및 R2는 서로 동일하거나 또는 상이하며, 각각 독립적으로 수소, 중수소, 할로겐, 시아노기, 니트로기, C1~C40의 알킬기, C2~C40의 알케닐기, C2~C40의 알키닐기, C3~C40의 시클로알킬기, 핵원자수 3 내지 40개의 헤테로시클로알킬기, C6~C60의 아릴기, 핵원자수 5 내지 60개의 헤테로아릴기, C1~C40의 알킬옥시기, C6~C60의 아릴옥시기, C3~C40의 알킬실릴기, C6~C60의 아릴실릴기, C1~C40의 알킬보론기, C6~C60의 아릴보론기, C6~C60의 아릴포스파닐기, C6~C60의 모노아릴포스피닐기, C6~C60의 디아릴포스피닐기, C6~C60의 아릴아민기, C5~C60의 아릴헤테로아릴아민기 및 핵원자수 5 내지 60개의 헤테로아릴아민기로 이루어진 군에서 선택되며;m은 0 내지 2의 정수이며, n는 0 내지 4의 정수이며,L은 단일결합이거나, 또는 C6~C18의 아릴렌기 및 핵원자수 5 내지 18개의 헤테로아릴렌기로 이루어진 군에서 선택되고,o는 0 내지 3의 정수이며,Ar1 및 Ar2는 서로 동일하거나 상이하며, 각각 독립적으로 수소, 중수소, 할로겐, 시아노기, 니트로기, C1~C40의 알킬기, C2~C40의 알케닐기, C2~C40의 알키닐기, C3~C40의 시클로알킬기, 핵원자수 3 내지 40개의 헤테로시클로알킬기, C6~C60의 아릴기, 핵원자수 5 내지 60개의 헤테로아릴기, C1~C40의 알킬옥시기, C6~C60의 아릴옥시기, C3~C40의 알킬실릴기, C6~C60의 아릴실릴기, C1~C40의 알킬보론기, C6~C60의 아릴보론기, C6~C60의 아릴포스파닐기, C6~C60의 모노아릴포스피닐기, C6~C60의 디아릴포스피닐기, C6~C60의 아릴아민기, C5~C60의 아릴헤테로아릴아민기 및 핵원자수 5 내지 60개의 헤테로아릴아민기로 이루어진 군에서 선택되며,상기 L의 아릴렌기, 헤테로아릴렌기와; Ar1 내지 Ar2, 및 R1 내지 R2의 알킬기, 알케닐기, 알키닐기, 시클로알킬기, 헤테로시클로알킬기, 아릴기, 헤테로아릴기, 알킬옥시기, 아릴옥시기, 알킬실릴기, 아릴실릴기, 알킬보론기, 아릴보론기, 아릴포스핀기, 아릴포스핀옥사이드기 및 아릴아민기는 각각 독립적으로 수소, 중수소(D), 할로겐, 시아노기, 니트로기, C1~C40의 알킬기, C2~C40의 알케닐기, C2~C40의 알키닐기, C3~C40의 시클로알킬기, 핵원자수 3 내지 40의 헤테로시클로알킬기, C6~C60의 아릴기, 핵원자수 5 내지 60의 헤테로아릴기, C1~C40의 알킬옥시기, C6~C60의 아릴옥시기, C1~C40의 알킬실릴기, C6~C60의 아릴실릴기, C1~C40의 알킬보론기, C6~C60의 아릴보론기, C6~C60의 아릴포스핀기, C6~C60의 아릴포스핀옥사이드기, C6~C60의 아릴아민기, C5~C60의 아릴헤테로아릴아민기, 및 핵원자수 5 내지 60개의 헤테로아릴아민기로 이루어진 군에서 선택된 1종 이상의 치환기로 치환될 수 있으며, 이때 상기 치환기가 복수인 경우, 이들은 서로 동일하거나 상이할 수 있으며,다만, 상기 m은 1 이상이거나; 또는 Ar1의 치환기 및 Ar2의 치환기 중 적어도 하나는 시아노기를 갖는다.
- 제1항에 있어서,m은 0 또는 1이며,R2는 수소, C6~C60의 아릴기, 및 핵원자수 5 내지 60의 헤테로아릴기로 이루어진 군에서 선택되는 화합물.
- 제1항에 있어서,상기 L은 단일결합이거나, 또는 하기 화학식 2 및 화학식 3 중 어느 하나로 표시되는 화합물:[화학식 2][화학식 3]상기 화학식 2 또는 3에서,*는 상기 화학식 1과 결합이 이루어지는 부분을 의미하며,Y는 C(R3)2, NR3, O, S 및 Se로 이루어진 군에서 선택되며,R3는 서로 동일하거나 또는 상이하며, 각각 독립적으로 수소, 중수소, 할로겐, 시아노기, 니트로기, C1~C40의 알킬기, C2~C40의 알케닐기, C2~C40의 알키닐기, C3~C40의 시클로알킬기, 핵원자수 3 내지 40개의 헤테로시클로알킬기, C6~C60의 아릴기, 핵원자수 5 내지 60개의 헤테로아릴기, C1~C40의 알킬옥시기, C6~C60의 아릴옥시기, C3~C40의 알킬실릴기, C6~C60의 아릴실릴기, C1~C40의 알킬보론기, C6~C60의 아릴보론기, C6~C60의 아릴포스파닐기, C6~C60의 모노아릴포스피닐기, C6~C60의 디아릴포스피닐기, C6~C60의 아릴아민기, C5~C60의 아릴헤테로아릴아민기, 및 핵원자수 5 내지 60개의 헤테로아릴아민기로 이루어진 군에서 선택되며,n은 1 내지 3의 정수이다.
- 제1항에 있어서,Ar1 및 Ar2는 서로 동일하거나 또는 상이하며, 각각 독립적으로 C6~C60의 아릴기 및 핵원자수 5 내지 60개의 헤테로아릴기로 구성된 군에서 선택되며,상기 Ar1 내지 Ar2의 아릴기 및 헤테로아릴기는, 각각 독립적으로 수소, 중수소(D), 할로겐, 시아노기, 니트로기, C1~C40의 알킬기, C2~C40의 알케닐기, C2~C40의 알키닐기, C3~C40의 시클로알킬기, 핵원자수 3 내지 40의 헤테로시클로알킬기, C6~C60의 아릴기, 핵원자수 5 내지 60의 헤테로아릴기, C1~C40의 알킬옥시기, C6~C60의 아릴옥시기, C1~C40의 알킬실릴기, C6~C60의 아릴실릴기, C1~C40의 알킬보론기, C6~C60의 아릴보론기, C6~C60의 아릴포스핀기, C6~C60의 아릴포스핀옥사이드기, C6~C60의 아릴아민기, C5~C60의 아릴헤테로아릴아민기, 및 핵원자수 5 내지 60개의 헤테로아릴아민기로 이루어진 군에서 선택된 1종 이상의 치환기로 치환될 수 있으며, 이때 상기 치환기가 복수인 경우, 이들은 서로 동일하거나 상이한 것인 화합물.
- 제1항에 있어서,상기 Ar1 및 Ar2 중 적어도 하나는 C6~C18의 아릴기이며,상기 아릴기는 적어도 하나의 질소를 포함하는 함질소 헤테로방향족환으로 치환되는 것인 화합물.
- 제1항에 있어서,상기 화학식 1로 표시되는 화합물은 발광층, 전자수송층 또는 전자수송 보조층 재료인 화합물.
- 양극, 음극 및 상기 양극과 음극 사이에 개재(介在)된 1층 이상의 유기물층을 포함하며, 상기 1층 이상의 유기물층 중 적어도 하나는 제1항 내지 제14항 중 어느 한 항에 기재된 화합물을 포함하는 유기 전계 발광 소자.
- 제15항에 있어서,상기 화합물을 포함하는 유기물층은 발광층, 발광 보조층, 전자수송층, 및 전자수송 보조층으로 구성된 군에서 선택되는 유기 전계 발광 소자.
- 제16항에 있어서,상기 발광층은 호스트 및 도펀트를 포함하며,상기 호스트는 상기 화학식 1의 화합물을 포함하는 유기 전계 발광 소자.
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KR20210043993A (ko) | 2021-04-22 |
EP4046992A1 (en) | 2022-08-24 |
JP2022551723A (ja) | 2022-12-13 |
JP7449376B2 (ja) | 2024-03-13 |
EP4046992A4 (en) | 2023-10-25 |
CN114555566A (zh) | 2022-05-27 |
US20240138173A1 (en) | 2024-04-25 |
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