WO2022158758A1 - 유기화합물 및 이를 포함한 유기전계발광소자 - Google Patents
유기화합물 및 이를 포함한 유기전계발광소자 Download PDFInfo
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- WO2022158758A1 WO2022158758A1 PCT/KR2022/000115 KR2022000115W WO2022158758A1 WO 2022158758 A1 WO2022158758 A1 WO 2022158758A1 KR 2022000115 W KR2022000115 W KR 2022000115W WO 2022158758 A1 WO2022158758 A1 WO 2022158758A1
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- BWESROVQGZSBRX-UHFFFAOYSA-N pyrido[3,2-d]pyrimidine Chemical group C1=NC=NC2=CC=CN=C21 BWESROVQGZSBRX-UHFFFAOYSA-N 0.000 description 1
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- 239000004332 silver Substances 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
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- 125000003003 spiro group Chemical group 0.000 description 1
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- 125000004434 sulfur atom Chemical group 0.000 description 1
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- PCCVSPMFGIFTHU-UHFFFAOYSA-N tetracyanoquinodimethane Chemical compound N#CC(C#N)=C1C=CC(=C(C#N)C#N)C=C1 PCCVSPMFGIFTHU-UHFFFAOYSA-N 0.000 description 1
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- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- MXSVLWZRHLXFKH-UHFFFAOYSA-N triphenylborane Chemical group C1=CC=CC=C1B(C=1C=CC=CC=1)C1=CC=CC=C1 MXSVLWZRHLXFKH-UHFFFAOYSA-N 0.000 description 1
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-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
- TYHJXGDMRRJCRY-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) tin(4+) Chemical compound [O-2].[Zn+2].[Sn+4].[In+3] TYHJXGDMRRJCRY-UHFFFAOYSA-N 0.000 description 1
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Definitions
- the present invention relates to an organic compound for an organic electroluminescent device and an organic electroluminescent device including the same, so that the organic electroluminescent device including a capping layer has a low refractive index property by the organic compound.
- LCD Liquid Crystal Display
- OLED Organic Light Emitting Diodes
- the basic structure of an OLED display is generally an anode, a hole injection layer (HIL), a hole transporting layer (HTL), an emission layer (EML), an electron transporting layer (Electron Transporting Layer, ETL) and a multilayer structure of a cathode, and a sandwich structure in which an electron organic multilayer film is formed between both electrodes.
- HIL hole injection layer
- HTL hole transporting layer
- ETL emission layer
- ETL electron transporting layer
- the organic light emitting phenomenon refers to a phenomenon in which electric energy is converted into light energy using an organic material.
- An organic light emitting device using an organic light emitting phenomenon generally has a structure including an anode and a cathode and an organic material layer therebetween.
- the organic material layer is often formed of a multi-layered structure composed of different materials in order to increase the efficiency and stability of the organic light emitting device, and may include, for example, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like.
- Such an organic light emitting device When a voltage is applied between the two electrodes in the structure of the organic light emitting device, holes are injected into the anode and electrons are injected into the organic material layer at the cathode. When the injected holes and electrons meet, an exciton is formed, and when the exciton falls to the ground state, light is emitted.
- Such an organic light emitting device is known to have characteristics such as self-luminescence, high luminance, high efficiency, low driving voltage, wide viewing angle, high contrast, and high-speed response.
- a material used as an organic material layer in an organic light emitting device may be classified into a light emitting material and a charge transport material, such as a hole injection material, a hole transport material, an electron transport material, an electron injection material, and the like, according to functions.
- the light-emitting material includes blue, green, and red light-emitting materials depending on the light-emitting color, and yellow and orange light-emitting materials necessary for realizing better natural colors.
- a host/dopant system may be used as a light emitting material. The principle is that when a small amount of a dopant having a smaller energy band gap and excellent luminous efficiency than the host constituting the light emitting layer is mixed in the light emitting layer in a small amount, excitons generated from the host are transported to the dopant to emit light with good efficiency. At this time, since the wavelength of the host moves to the wavelength band of the dopant, light having a desired wavelength can be obtained according to the type of dopant used.
- materials constituting the organic material layer in the device such as a hole injection material, a hole transport material, a light emitting material, an electron transport material, an electron injection material, etc. have been developed, and for this reason, recently commercialized The performance of organic light emitting diodes is being recognized by these products.
- the organic light emitting diode Since the organic light emitting diode is exposed to an external light source for a large amount of time, it is in an environment exposed to ultraviolet rays having high energy. Accordingly, there is a problem that the organic material constituting the organic light emitting device is continuously affected. In order to prevent exposure to such a high energy light source, the problem can be solved by applying a capping layer having ultraviolet absorption characteristics to the organic light emitting diode.
- the value of the refractive index required for blue is large, and the longer the wavelength, the smaller the value of the required refractive index. Accordingly, it is necessary to develop a material constituting the capping layer that simultaneously satisfies the above-mentioned ultraviolet absorption characteristics and an appropriate refractive index.
- the efficiency of an organic light emitting diode can be generally divided into internal luminescent efficiency and external luminescent efficiency.
- the internal luminous efficiency is related to the efficiency of the formation of excitons in the organic layer for light conversion to take place.
- the external luminous efficiency refers to the efficiency at which light generated in the organic layer is emitted to the outside of the organic light emitting device.
- CPL capping layer
- the top device structure of the resonant structure is compared with the bottom device structure of the non-resonant structure, the formed light is reflected by the anode, which is a reflective film, and comes out toward the cathode, so optical energy loss due to SPP (Surface Plasmon Polariton) is reduced. Big.
- SPP Surface Plasmon Polariton
- one of the important methods for improving the shape and efficiency of the EL spectrum is a method of using a light efficiency improving layer (capping layer) for the top cathode.
- SPP single type of metals are mainly used for electron emission: Al, Pt, Ag, and Au, and surface plasmons are generated on the surface of the metal electrode.
- the cathode is used as Ag
- the emitted light is quenched by SPP (light energy loss due to Ag) and the efficiency is reduced.
- the present invention is a first electrode; an organic material layer disposed on the first electrode; a second electrode disposed on the organic material layer; and a capping layer disposed on the second electrode, wherein the organic material layer or the capping layer provides an organic electroluminescent device including an organic compound represented by Formula 1 below.
- W 1 to W 5 are each independently N or CR a ,
- R a is selected from H, F, CF 3 and Si(CH 3 ) 3 ,
- L 1 and L 2 are each independently selected from a phenylene group, a pyridylene group, and a naphthalene group,
- n 0 or 1
- n is an integer from 1 to 5
- Ar 1 is a phenyl group; F, CF 3 , or a phenyl group substituted with Si(CH 3 ) 3 ; pyridyl group; naphthyl group; quinoline group; isoquinoline group; dibenzofuran group; dibenzothiophene group; benzoxazole group; benzothiazole group; and a benzimidazole group; any one selected from
- the compound described herein may be used as a material for an organic layer of an organic light emitting device.
- An organic light emitting device in which the compound described herein is applied to a low refractive index capping layer may have improved luminous efficiency and remarkably improved color purity due to a reduction in the emission spectrum's full width at half maximum.
- the organic electroluminescent device continuously introduces a thin film of a high refractive organic material and a thin film of low refractive index on an MgAg electrode, thereby improving the viewing angle and luminous efficiency of light extracted into the air due to the waveguide resonance phenomenon.
- FIG. 1 shows a first electrode 110, a hole injection layer 210, a hole transport layer 215, a light emitting layer 220, an electron transport layer 230, and an electron injection layer on a substrate 100 according to an embodiment of the present invention.
- An example of an organic light emitting device in which 235 , the second electrode 120 , and the capping layer 300 are sequentially stacked is shown.
- substituted or unsubstituted is a deuterium atom, a halogen atom, a cyano group, a nitro group, an amino group, a hydroxy group, a silyl group, a boron group, a phosphine oxide group, a phosphine sulfide group, an alkyl group, a halogenated alkyl group, alkoxy It may mean unsubstituted or substituted with one or more substituents selected from the group consisting of a group, an alkenyl group, an aryl group, a heteroaryl group, and a heterocyclic group.
- each of the substituents exemplified above may be substituted or unsubstituted.
- a biphenyl group may be interpreted as an aryl group or a phenyl group substituted with a phenyl group.
- examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom or an iodine atom.
- the alkyl group may be linear, branched or cyclic.
- the number of carbon atoms in the alkyl group is 1 or more and 50 or less, and preferably 1 or more and 6 or less.
- Examples of the alkyl group include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, s-butyl group, t-butyl group, i-butyl group, 2-ethylbutyl group, 3, 3-dimethylbutyl group , n-pentyl group, i-pentyl group, neopentyl group, t-pentyl group, cyclopentyl group, 1-methylpentyl group, 3-methylpentyl group, 2-ethylpentyl group, 4-methyl-2-pentyl group , n-hexyl group, 1-methylhexyl group, 2-ethylhexyl group, 2-buty
- the hydrocarbon ring group means any functional group or substituent derived from an aliphatic hydrocarbon ring.
- the hydrocarbon ring group may be a saturated hydrocarbon ring group having 5 to 20 ring carbon atoms.
- the aryl group means any functional group or substituent derived from an aromatic hydrocarbon ring.
- the aryl group may be a monocyclic aryl group or a polycyclic aryl group.
- the number of ring carbon atoms of the aryl group may be 6 or more and 30 or less, preferably 6 or more and 15 or less.
- aryl group examples include a phenyl group, a naphthyl group, a fluorenyl group, an anthracenyl group, a phenanthryl group, a biphenyl group, a terphenyl group, a quarterphenyl group, a quinkphenyl group, a sexyphenyl group, a triphenylenyl group, a pyrenyl group, a peryleneyl group, a naphtha group
- a cenyl group, a pyrenyl group, a benzo fluoranthenyl group, a chrysenyl group, etc. can be illustrated, it is not limited to these.
- the fluorenyl group may be substituted, and two substituents may be bonded to each other to form a spiro structure.
- the heteroaryl group may be a heteroaryl group including at least one of O, N, P, Si and S as a heterogeneous element.
- the N and S atoms may optionally be oxidized and the N atom(s) may optionally be quaternized.
- the number of ring carbon atoms in the heteroaryl group is 2 or more and 30 or less, or 2 or more and 20 or less.
- the heteroaryl group may be a monocyclic heteroaryl group or a polycyclic heteroaryl group.
- the polycyclic heteroaryl group may have, for example, a bicyclic or tricyclic structure.
- heteroaryl group examples include a thiophene group, a furan group, a pyrrole group, an imidazole group, a pyrazolyl group, a thiazole group, an oxazole group, an oxadiazole group, a triazole group, a pyridine group, a bipyridine group, a pyrimidine group, a triazine group , tetrazine group, triazole group, tetrazole group, acridyl group, pyridazine group, pyrazinyl group, quinoline group, quinazoline group, quinoxaline group, phenoxazine group, phthalazine group, pyridopyrimidine group, pyridopyrazino group Pyrazine group, isoquinoline group, cinnol group, indole group, isoindole group, indazole group, carbazole group, N-
- the N-oxide aryl group corresponding to the monocyclic heteroaryl group or the polycyclic heteroaryl group includes, for example, a quaternary salt such as a pyridyl N-oxide group and a quinolyl N-oxide group, but these include not limited
- the silyl group includes an alkyl silyl group and an aryl silyl group.
- the silyl group include a trimethylsilyl group, a triethylsilyl group, a t-butyldimethylsilyl group, a vinyldimethylsilyl group, a propyldimethylsilyl group, a triphenylsilyl group, a diphenylsilyl group, a phenylsilyl group, and the like. not limited
- the boron group includes an alkyl boron group and an aryl boron group.
- the boron group include, but are not limited to, a trimethylboron group, a triethylboron group, a t-butyldimethylboron group, a triphenylboron group, a diphenylboron group, and a phenylboron group.
- the alkenyl group may be linear or branched. Although carbon number is not specifically limited, 2 or more and 30 or less, Preferably it is 2 or more and 10 or less.
- Examples of the alkenyl group include, but are not limited to, a vinyl group, a 1-butenyl group, a 1-pentenyl group, a 1,3-butadienyl aryl group, a styrenyl group, a styryl vinyl group, and the like.
- adjacent group means a substituent substituted on an atom directly connected to the atom in which the substituent is substituted, another substituent substituted on the atom in which the substituent is substituted, or the substituent most sterically adjacent to the substituent.
- substituents can For example, in 1,2-dimethylbenzene, two methyl groups can be interpreted as “adjacent groups” to each other, and in 1,1-diethylcyclopentene, 2 The two ethyl groups can be interpreted as “adjacent groups” to each other.
- the organic compound according to an embodiment of the present invention is represented by the following formula (1)
- W 1 to W 5 are each independently N or CR a ,
- R a is selected from H, F, CF 3 and Si(CH 3 ) 3 ,
- L 1 and L 2 are each independently selected from a phenylene group, a pyridylene group, and a naphthalene group,
- n 0 or 1
- n is an integer from 1 to 5
- Ar 1 is a phenyl group; F, CF 3 , or a phenyl group substituted with Si(CH 3 ) 3 ; pyridyl group; naphthyl group; quinoline group; isoquinoline group; dibenzofuran group; dibenzothiophene group; benzoxazole group; benzothiazole group; and a benzimidazole group; any one selected from
- Chemical Formula 1 is an organic compound represented by Chemical Formulas 2 to 5 below.
- Z 1 and Z 2 are each independently O or S,
- X 1 and X 2 are each independently CH or N (at least one of X 1 and X 2 is CH),
- X 3 and X 4 are each independently CH or N (at least one of X 3 and X 4 is CH),
- R 1 is selected from H, F, CF 3 and Si(CH 3 ) 3 ,
- p is an integer from 0 to 5
- W 1 to W 5 , L 1 , L 2 , m and n are as defined in Formula 1 above.
- the organic compound of Formula 1 may be any one selected from compounds represented by Formula 6 below, and the following compounds may be further substituted.
- FIGS. 1 and 2 an embodiment of the present invention will be described with reference to FIGS. 1 and 2 .
- an organic electroluminescent device includes a first electrode 110 , a hole injection layer 210 , a hole transport layer 215 , and a light emitting layer 220 sequentially stacked on a substrate 100 . , an electron transport layer 230 , an electron injection layer 235 , a second electrode 120 , and a capping layer 300 .
- the first electrode 110 and the second electrode 120 are disposed to face each other, and the organic material layer 200 may be disposed between the first electrode 110 and the second electrode 120 .
- the organic material layer 200 may include a hole injection layer 210 , a hole transport layer 215 , a light emitting layer 220 , an electron transport layer 230 , and an electron injection layer 235 .
- the capping layer 300 presented in the present invention is a functional layer deposited on the second electrode 120 and includes an organic material according to Chemical Formula 1 of the present invention.
- the first electrode 110 has conductivity.
- the first electrode 110 may be formed of a metal alloy or a conductive compound.
- the first electrode 110 is generally an anode, but the function as an electrode is not limited.
- the first electrode 110 may be formed by depositing an electrode material on the substrate 100 using a deposition method, electron beam evaporation, or sputtering.
- the material of the first electrode 110 may be selected from materials having a high work function to facilitate injection of holes into the organic electroluminescent device.
- the capping layer 300 proposed in the present invention is applied when the emission direction of the organic electroluminescent device is top emission, and thus the first electrode 110 uses a reflective electrode.
- These materials include Mg (magnesium), Al (aluminum), Al-Li (aluminum-lithium), Ca (calcium), Mg-In (magnesium-indium), Mg-Ag (magnesium-silver) and It can also be manufactured using the same metal.
- carbon substrate flexible electrode materials such as CNT (carbon nanotube) and graphene (graphene) may be used.
- the organic material layer 200 may be formed of a plurality of layers.
- the organic material layer 200 includes the hole transport regions 210 to 215 disposed on the first electrode 110 , the light emitting layer 220 disposed on the hole transport region, and the It may include electron transport regions 230 to 235 disposed on the emission layer 220 .
- the capping layer 300 includes an organic compound represented by Chemical Formula 1 to be described later.
- the hole transport regions 210 to 215 are provided on the first electrode 110 .
- the hole transport regions 210 to 215 may include at least one of a hole injection layer 210 , a hole transport layer 215 , a hole buffer layer, and an electron blocking layer (EBL), and smoothly inject and transport holes into the organic electroluminescent device.
- EBL electron blocking layer
- hole mobility is faster than electron mobility, it has a thicker thickness than the electron transport region.
- the hole transport regions 210 to 215 may have a single layer made of a single material, a single layer made of a plurality of different materials, or a multilayer structure having a plurality of layers made of a plurality of different materials.
- the hole transport regions 210 to 215 may have a single-layer structure of the hole injection layer 210 or the hole transport layer 215 , and have a single-layer structure made of a hole injection material and a hole transport material.
- the hole transport regions 210 to 215 have a single layer structure made of a plurality of different materials, or a hole injection layer 210/hole transport layer 215 stacked sequentially from the first electrode 110 , Hole injection layer 210 / hole transport layer 215 / hole buffer layer, hole injection layer 210 / hole buffer layer, hole transport layer 215 / hole buffer layer, or hole injection layer 210 / hole transport layer 215 / electron It may have a structure of the blocking layer EBL, but the embodiment is not limited thereto.
- the hole injection layer 210 may be formed on the anode by various methods such as a vacuum deposition method, a spin coating method, a casting method, and an LB method.
- the deposition conditions are, depending on the compound used as the material for the hole injection layer 210 and the structure and thermal characteristics of the hole injection layer 210 for the purpose, etc.,
- the deposition rate at 100 to 500° C. can be freely adjusted to about 1 ⁇ /s, and is not limited to specific conditions.
- the coating conditions are different depending on the characteristics between the compound used as the hole injection layer 210 material and the layers formed as the interface, but for even film formation Appropriate coating speed, heat treatment to remove solvent after coating, etc. are required.
- the hole transport regions 210 to 215 are, for example, m-MTDATA, TDATA, 2-TNATA, NPB, ⁇ -NPB, TPD, Spiro-TPD, Spiro-NPB, methylated-NPB, TAPC, HMTPD, TCTA.
- Pani/DBSA Polyaniline/Dodecylbenzenesulfonic acid: polyaniline/dodecylbenzene sulfonic acid
- PEDOT/PSS Poly(3,4-ethylenedioxythiophene)/Poly(4-styrene sulfonate):poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate)
- Pani/CSA Polyaniline/Camphor sulfonicacid: polyaniline/camphorsulfonic acid
- Pani/DBSA Polyaniline/Dodecylbenzenesulfonic acid: polyaniline/dodecylbenzene sulfonic acid
- PEDOT/PSS Poly(3,4-ethylened
- the hole transport regions 210 to 215 may have a thickness of 100 to 10,000 ⁇ , and the organic material layers in each of the hole transport regions 210 to 215 are not limited to the same thickness. For example, if the hole injection layer 210 has a thickness of 50 ⁇ , the hole transport layer 215 may have a thickness of 1000 ⁇ and the electron blocking layer may have a thickness of 500 ⁇ .
- the thickness condition of the hole transport regions 210 to 215 may be determined to a degree that satisfies the efficiency and lifespan within a range in which the driving voltage increase of the organic electroluminescent device does not increase.
- the organic material layer 200 includes a hole injection layer 210, a hole transport layer 215, a functional layer having a hole injection function and a hole transport function at the same time, a buffer layer, an electron blocking layer, a light emitting layer 220, a hole blocking layer, an electron transport layer ( 230), the electron injection layer 235, and one or more layers selected from the group consisting of a functional layer having an electron transport function and an electron injection function at the same time.
- the hole transport regions 210 to 215 may be doped to improve properties like the light emitting layer 220 , and the doping of a charge-generating material into the hole transport regions 210 to 215 is the electrical characteristic of the organic electroluminescent device. can be improved
- the charge-generating material is generally made of a material having a very low HOMO and LUMO.
- the LUMO of the charge-generating material has a value similar to the HOMO of the hole transport layer 215 material. Due to the low LUMO, holes are easily transferred to the adjacent hole transport layer 215 by using the electron vacancy characteristic of the LUMO, thereby improving electrical properties.
- the charge-generating material may be, for example, a p-dopant.
- the p-dopant may be one of a quinone derivative, a metal oxide, and a cyano group-containing compound, but is not limited thereto.
- the p-dopant include tetracyanoquinonedimethane (TCNQ) and 2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane quinone derivatives such as phosphorus (F4-TCNQ) and the like; metal oxides such as tungsten oxide and molybdenum oxide; and a cyano group-containing compound, but is not limited thereto.
- the hole transport regions 210 to 215 may further include a charge generating material to improve conductivity.
- the charge generating material may be uniformly or non-uniformly dispersed in the hole transport regions 210 to 215 .
- the charge generating material may be, for example, a p-dopant.
- the p-dopant may be one of a quinone derivative, a metal oxide, and a cyano group-containing compound, but is not limited thereto.
- p-dopants include quinone derivatives such as Tetracyanoquinodimethane (TCNQ) and 2,3,5,6-tetrafluoro-tetracyanoquinodimethane (TCNQ), and metal oxides such as tungsten oxide and molybdenum oxide. may be mentioned, but is not limited thereto.
- the hole transport regions 210 to 215 may further include at least one of a hole buffer layer and an electron blocking layer in addition to the hole injection layer 210 and the hole transport layer 215 .
- the hole buffer layer may increase light emission efficiency by compensating for a resonance distance according to a wavelength of light emitted from the emission layer 220 .
- a material included in the hole buffer layer a material capable of being included in the hole transport regions 210 to 215 may be used.
- the electron blocking layer is a layer serving to prevent electron injection from the electron transport region 230 to 235 to the hole transport region 210 to 215 .
- the electron blocking layer may use a material having a high T1 value so that excitons formed in the emission layer 220 do not diffuse into the hole transport regions 210 to 215 as well as to block electrons moving to the hole transport region.
- a host of the light emitting layer 220 having a generally high T1 value may be used as the electron blocking layer material.
- the emission layer 220 is provided on the hole transport regions 210 to 215 .
- the light emitting layer 220 may have a thickness of, for example, 100 ⁇ to 1000 ⁇ , or 100 ⁇ to 300 ⁇ .
- the light emitting layer 220 may have a single layer made of a single material, a single layer made of a plurality of different materials, or a multilayer structure having a plurality of layers made of a plurality of different materials.
- the light emitting layer 220 is a region where holes and electrons meet to form excitons.
- the material constituting the light emitting layer 220 must have an appropriate energy band gap to exhibit high light emitting characteristics and a desired light emission color.
- two types of a host and a dopant are used. It is made of two materials having a role, but is not limited thereto.
- the host may include at least one of the following TPBi, TBADN, ADN (also referred to as “DNA”), CBP, CDBP, TCP, and mCP, but is not limited thereto.
- the dopant of the light emitting layer 220 may be an organometallic complex.
- the content of the general dopant may be selected from 0.01 to 20%, but is not limited thereto.
- the electron transport regions 230 to 235 are provided on the emission layer 220 .
- the electron transport regions 230 to 235 may include at least one of a hole blocking layer, an electron transport layer 230 , and an electron injection layer 235 , but are not limited thereto.
- the electron transport regions 230 to 235 may have a single layer made of a single material, a single layer made of a plurality of different materials, or a multilayer structure having a plurality of layers made of a plurality of different materials.
- the electron transport regions 230 to 235 may have a single-layer structure of the electron injection layer 235 or the electron transport layer 230 , or may have a single-layer structure made of an electron injection material and an electron transport material. have.
- the electron transport regions 230 to 235 have a single layer structure made of a plurality of different materials, or the electron transport layer 230/electron injection layer 235 and the hole blocking layer are sequentially stacked from the light emitting layer 220 . It may have a layer/electron transport layer 230/electron injection layer 235 structure, but is not limited thereto.
- the thickness of the electron transport regions 230 to 235 may be, for example, 1000 ⁇ to 1500 ⁇ .
- the electron transport regions 230 to 235 may be formed by various methods such as a vacuum deposition method, a spin coating method, a casting method, a Langmuir-Blodgett (LB) method, an inkjet printing method, a laser printing method, and a Laser Induced Thermal Imaging (LITI) method. method can be used.
- a vacuum deposition method such as a vacuum deposition method, a spin coating method, a casting method, a Langmuir-Blodgett (LB) method, an inkjet printing method, a laser printing method, and a Laser Induced Thermal Imaging (LITI) method. method can be used.
- LB Langmuir-Blodgett
- LITI Laser Induced Thermal Imaging
- the electron transport region 230 may include an anthracene-based compound.
- the electron transport region is, for example, Alq3(Tris(8-hydroxyquinolinato)aluminum), 1,3,5-tri[(3-pyridyl)-phen-3-yl]benzene, 2 ,4,6-tris(3'-(pyridin-3-yl)biphenyl-3-yl)-1,3,5-triazine, 2-(4-(N-phenylbenzoimidazolyl-1-ylphenyl)-9,10 -dinaphthylanthracene, TPBi(1,3,5-Tri(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl), BCP(2,9-Dimethyl-4,7-diphenyl-1,10- phenanthroline), Bphen(4,7-
- the electron transport layer 230 is selected as a material having a fast electron mobility or a slow electron mobility according to the structure of the organic light emitting device, various materials need to be selected, and in some cases, Liq or Li may be doped.
- the electron transport layers 230 may have a thickness of 100 ⁇ to 1000 ⁇ , for example, 150 ⁇ to 500 ⁇ . When the thickness of the electron transport layers 230 satisfies the above-described range, a satisfactory electron transport characteristic may be obtained without a substantial increase in driving voltage.
- the electron transport regions 230 to 235 may include a metal material that facilitates electron injection, and includes LiF, LiQ. (Lithium quinolate), Li 2 O, BaO, NaCl, CsF, a lanthanide metal such as Yb, or a metal halide such as RbCl or RbI may be used, but is not limited thereto.
- a metal material that facilitates electron injection includes LiF, LiQ. (Lithium quinolate), Li 2 O, BaO, NaCl, CsF, a lanthanide metal such as Yb, or a metal halide such as RbCl or RbI may be used, but is not limited thereto.
- the electron injection layer 235 may also be made of a material in which an electron transport material and an insulating organometal salt are mixed.
- the organometallic salt may be a material having an energy band gap of about 4 eV or more.
- the organometallic salt may include metal acetate, metal benzoate, metal acetoacetate, metal acetylacetonate or metal stearate.
- the electron injection layer 235 may have a thickness of 1 ⁇ to 100 ⁇ , preferably 3 ⁇ to 90 ⁇ . When the thickness of the electron injection layer 235 satisfies the above-described range, a satisfactory level of electron injection characteristics may be obtained without a substantial increase in driving voltage.
- the electron transport regions 230 to 235 may include a hole blocking layer.
- the hole blocking layer includes, for example, at least one of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), and Balq. can, but is not limited thereto.
- the second electrode 120 is provided on the electron transport regions 230 to 235 .
- the second electrode 120 may be a common electrode or a cathode.
- the second electrode 120 may be a transmissive electrode or a transflective electrode.
- the second electrode 120 may use a combination of a metal, an electrically conductive compound, an alloy, etc. having a relatively low work function.
- the second electrode 120 is a transflective electrode or a reflective electrode.
- the second electrode 120 includes Li (lithium), Mg (magnesium), Al (aluminum), Al-Li (aluminum-lithium), Ca (calcium), Mg-In (magnesium-indium), and Mg-Ag (magnesium).
- -silver or a compound or mixture containing them (eg, a mixture of Ag and Mg).
- a plurality of layer structures including a reflective or semi-transmissive film formed of the above material and a transparent conductive film formed of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO), etc. can be
- the second electrode 120 may be connected to the auxiliary electrode.
- the resistance of the second electrode 120 may be reduced.
- the substrate 100 may use a rigid or flexible material, for example, soda lime glass, alkali-free glass, aluminosilicate glass as the rigid material.
- a rigid or flexible material for example, soda lime glass, alkali-free glass, aluminosilicate glass.
- PC polycarbonate
- PES polyether sulfone
- COC cyclic oliphene copolymer
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- the organic electroluminescent device As a voltage is applied to each of the first electrode 110 and the second electrode 120 , holes injected from the first electrode 110 pass through the hole transport regions 210 to 215 . The electrons are moved to the emission layer 220 , and the electrons injected from the second electrode 120 move to the emission layer 220 through the electron transport regions 230 to 235 . Electrons and holes recombine in the emission layer 220 to generate excitons, and the excitons emit light while falling from the excited state to the ground state.
- the path of light generated in the light emitting layer 220 may exhibit very different tendencies according to refractive indices of organic and inorganic materials constituting the organic electroluminescent device.
- Light passing through the second electrode 120 may pass only light transmitted at an angle smaller than the critical angle of the second electrode 120 .
- Lights contacting the second electrode 120 larger than the other critical angles are totally reflected or reflected, so that they are not emitted to the outside of the organic electroluminescent device.
- the refractive index of the capping layer 300 When the refractive index of the capping layer 300 is high, it contributes to the improvement of luminous efficiency by reducing such total reflection or reflection, and when it has an appropriate thickness, it also contributes to high efficiency improvement and color purity improvement by maximizing the micro-cavity phenomenon.
- the capping layer 300 is located at the outermost part of the organic electroluminescent device, and has a great influence on device characteristics without affecting the driving of the device. Therefore, the capping layer 300 is important both in terms of improving the characteristics of the device as well as serving as an internal protection of the organic electroluminescent device.
- Organic materials absorb light energy in a specific wavelength region, which depends on the energy band gap. When this energy band gap is adjusted for the purpose of absorbing the UV region that can affect the organic materials inside the organic electroluminescent device, the capping layer 300 including the organic materials can improve the optical properties of the organic electroluminescent device. It can also be used for the purpose of protecting a light emitting device.
- the organic light emitting device may be a top emission type, a back emission type, or a double side emission type depending on the material used.
- reaction mixture was purified by silica gel column chromatography (toluene) and solidified with hexane at low temperature to obtain 26.3 g (yield: 70.5%) of the compound as a white solid (intermediate (3)).
- reaction mixture was purified by silica gel column chromatography (CHCl 3 ) and solidified with a mixed solvent (DCM/EtOH) to obtain 52.5 g (yield: 89.6%) of the compound (intermediate (6)) as a white solid.
- 1-bromo-4-chlorobenzene (1-bromo-4-chlorobenzene) 30.0 g (156.7 mmol), 3,5-bistrifluoromethylphenylboronic acid ((3,5-bis ( trifluoromethyl)phenyl)boronic acid) 40.4 g (156.7 mmol), Pd(PPh 3 ) 4 5.4 g (4.7 mmol), K 2 CO 3 65.0 g (470.1 mmol), toluene 500 mL, ethanol 150 mL, and water 150 mL After mixing, the mixture was stirred under reflux for 12 hours.
- reaction mixture was purified by silica gel column chromatography (Hex:CH 2 Cl 2 ) and solidified with methanol/hexane to obtain 10.2 g (yield: 74.4%) of the compound as a white solid (intermediate (21)).
- reaction mixture was purified by silica gel column chromatography (CHCl 3 ) and solidified with a mixed solution (DCM/MeOH) to obtain 19.3 g of a white solid compound (intermediate (22)) (yield: 92.7%).
- reaction mixture was purified by silica gel column chromatography (Hex:EA), solidified with a mixed solution (Hex/EA), and filtered to obtain 59.3 g of a pale yellow solid compound (intermediate (27)) (yield: 68.5%). .
- reaction mixture was purified by column chromatography (CHCl 3 ) and solidified with a mixed solvent (DCM/MeOH) to obtain 10.3 g (yield: 46.3%) of the compound (intermediate (29)) as a white solid.
- 6-bromonaphthalen-2-ol (6-bromonaphthalen-2-ol) 120.0 g (537.9 mmol), bis (pinacolato) diboron ⁇ bis (pinacolato) diboron ⁇ 150.3 g (591.7) mmol), Pd(dppf)Cl 2 17.6 g (21.5 mmol), 211.2 g (1.1 mol) of potassium acetate (KOAc), and 2000 mL of Dioxane were added together, and refluxed at 100° C. under nitrogen all day.
- reaction mixture was dissolved in 300 mL of hot MCB, filtered through silica gel, and solidified with chloroform/methanol to obtain 1.9 g (yield: 30.5%) of compound 6-9 (LT20-30-477) as a white solid.
- reaction mixture was purified by silica gel column chromatography (Hex:CHCl 3 ) and solidified with a mixed solvent (DCM/EA/MeOH), and 2.8 g of compound 6-64 (LT20-30-457) as a white solid (yield: 43.7) %) was obtained.
- Synthesis example 12 Synthesis of compound 6-82 (LT20-30-142)
- reaction mixture was purified by silica gel column chromatography (CHCl 3 ) and solidified with a mixed solution (DCM/MeOH) to obtain 19.3 g (yield: 92.7%) of compound 6-82 (LT20-30-142) as a white solid. .
- intermediate (22) 3.0 g (8.4 mmol), intermediate (21) 3.5 g (10.1 mmol), Pd(dba) 2 485.0 mg (509.0 ⁇ mol), X-Phos 804.0 mg (1.7 mmol), 5.4 g (25.3 mmol) of K 3 PO 4 and 45 mL of xylene were mixed and stirred under reflux for 12 hours. After the reaction was completed, it was cooled to room temperature, the solid was filtered, washed with water and methanol, and dried.
- intermediate (27) 3.5 g (9.9 mmol), intermediate (10) 5.4 g (12.9 mmol), Pd(PPh 3 ) 4 572.0 mg (615.9 ⁇ mol), 2M K 2 CO 3 13.0 mL (24.8) mmol), 30 mL of toluene and 10 mL of ethanol were mixed and stirred under reflux for 12 hours. After the reaction was completed, it was cooled to room temperature, the solid was filtered, washed with water and methanol, and dried.
- reaction mixture was purified by column chromatography (Hex:CHCl 3 ) and solidified with a mixed solvent (DCM/EA) to obtain 1.7 g (yield: 27.3%) of compound 6-230 (LT20-30-443) as a white solid. .
- Synthesis example 24 Synthesis of compound 6-243 (LT20-30-486)
- Synthesis example 25 Synthesis of compound 6-246 (LT20-30-514)
- Synthesis example 26 Synthesis of compound 6-268 (LT20-30-442)
- Synthesis example 27 Synthesis of compound 6-284 (LT20-35-003)
- Synthesis example 28 Synthesis of compound 6-340 (LT20-35-005)
- Synthesis example 29 Synthesis of compound 6-364 (LT20-30-461)
- Synthesis example 30 Synthesis of compound 6-461 (LT18-30-479)
- 1,3-dibromobenzene (1,3-Dibromobenzene) 1.8 g (7.63 mmol), Intermediate (10) 8.6 g (20.6 mmol), Pd (PPh 3 ) 4 0.9 g (0.8 mmol) ), toluene 38 mL, ethanol 19 mL and 2M K 2 CO 3 19 mL (38.2 mmol) are stirred at 80° C. all day. After confirming the reaction, the mixture was extracted with EA, and purified by silica gel column chromatography (MC:HEX) by removing moisture and solvent.
- MC:HEX silica gel column chromatography
- Synthesis example 31 Synthesis of compound 6-463 (LT20-35-987)
- Synthesis example 32 Synthesis of compound 6-471 (LT19-30-167)
- Synthesis example 33 Synthesis of compound 6-491 (LT20-35-985)
- Synthesis example 34 Synthesis of compound 6-505 (LT20-35-988)
- reaction mixture was purified by silica gel column chromatography (CHCl 3 ) and solidified with a mixed solution (DCM/Hex) to obtain 2.0 g (yield: 40.0%) of compound 6-505 (LT20-35-988) as a white solid. .
- Synthesis example 35 Synthesis of compound 6-513 (LT20-35-984)
- 2-bromoquinoline (2-bromoquinoline) 1.9 g (12.3 mmol), intermediate (37) 5.0 g (12.3 mmol), Pd (PPh 3 ) 4 0.5 g (0.5 mmol), potassium carbonate 2.6 g (18.4 mmol), 150 mL of toluene, 30 mL of ethanol, and 30 mL of water were mixed and stirred under reflux for 12 hours. After completion of the reaction, the mixture was cooled to room temperature, added with water, extracted with ethyl acetate, and the solvent was removed under reduced pressure.
- reaction mixture was purified by silica gel column chromatography (CHCl 3 ) and solidified with a mixed solution (DCM/Hex) to obtain 2.1 g (yield: 41.9%) of compound 6-513 (LT20-35-984) as a white solid. .
- J.A. Measure n (refractive index) and k (extinction coefficient) using WOOLLAM's Ellipsometer.
- a glass substrate (0.7T) is washed in Ethanol, DI Water, and Acetone for 10 minutes each, and then 800 ⁇ of the compound is deposited on the glass substrate to prepare a single film.
- the optical characteristic device was manufactured by depositing REF01 (80 nm) on glass. Before depositing the compound, the glass was subjected to oxygen plasma treatment at 2 ⁇ 10 - 2 Torr at 125 W for 2 minutes. The compound was deposited at a vacuum of 9 ⁇ 10 - 7 Torr, and the compound was deposited at a rate of 1 ⁇ /sec to produce a single film.
- Comparative Test Example 2 a single membrane was manufactured in the same manner as in Comparative Test Example, except that each compound shown in Table 1 was used instead of REF01.
- Table 1 shows the optical properties of the compounds prepared in Comparative Test Examples and Test Examples 1 to 35.
- the optical properties are refractive index constants at 460 nm and 620 nm wavelengths.
- n values in the blue region (460 nm) and the red region (620 nm) of Comparative Test Example 1 (Alq 3 ) were 1.808 and 1.690, respectively, whereas most of the compounds according to the present invention It was confirmed that they generally had a lower refractive index (n ⁇ 1.69 @620nm) than the compound (Alq 3 ) of Comparative Test Example 1 in the blue region, the green region, and the red region. This satisfies the low refractive index value required to secure a high viewing angle in the blue region.
- ITO a transparent electrode
- 2-TNATA is a hole injection layer
- NPB is a hole transport layer
- ⁇ -ADN is a host of the light emitting layer
- Pyene-CN is a blue fluorescent dopant
- Alq 3 is an electron transport layer.
- Liq was used as the electron injection layer
- Mg:Ag was used as the cathode.
- Comparative Example 1 (without capping layer): ITO / 2-TNATA (60 nm) / NPB (20 nm) / ⁇ -ADN: 10% Pyrene-CN (30 nm) / Alq 3 (30 nm) / Liq (2) nm) / Mg:Ag (1:9, 10 nm)
- Comparative Example 2 (Capping layer consists of one layer): ITO / 2-TNATA (60 nm) / NPB (20 nm) / ⁇ -ADN: 10% Pyrene-CN (30 nm) / Alq 3 (30 nm) / Liq (2 nm) / Mg:Ag (1:9, 10 nm) / Alq 3 (80 nm)
- Blue fluorescent organic electroluminescent device is ITO (180 nm) / 2-TNATA (60 nm) / NPB (20 nm) / ⁇ -ADN:Pyrene-CN 10% (30 nm) / Alq 3 (30 nm) / Liq ( 2 nm) / Mg:Ag (1:9, 10 nm) / capping layer was deposited in the order to fabricate a device.
- the ITO electrode Before depositing the organic material, the ITO electrode was subjected to oxygen plasma treatment at 2 ⁇ 10 - 2 Torr at 125 W for 2 minutes. Organic materials were deposited at a vacuum degree of 9 ⁇ 10 - 7 Torr, Liq was 0.1 ⁇ /sec, ⁇ -ADN was 0.18 ⁇ /sec, and Pyrene-CN was simultaneously deposited at 0.02 ⁇ /sec, and the remaining organic materials were all 1 Deposited at a rate of ⁇ /sec.
- the device After the device was manufactured, it was encapsulated in a glove box filled with nitrogen gas to prevent the device from contacting air and moisture. After forming the barrier with 3M's adhesive tape, barium oxide, a moisture absorbent that can remove moisture, was added and a glass plate was attached.
- a multilayer having a high refractive layer (60 nm) formed on a low refractive layer (20 nm) as a capping layer, REF01 compound in the high refractive layer, and each compound shown in Table 2 below in the low refractive layer was used except that fabricated the device in the same manner as in the above example.
- Table 2 shows the electroluminescence characteristics of the organic electroluminescent devices prepared in Comparative Example 1, Comparative Example 2, and Examples 1-35.
- a specific organic compound according to the present invention can be used as a material for a low refractive index capping layer of an organic electronic device including an organic light emitting device, and an organic electronic device including an organic light emitting device using the same has efficiency and driving efficiency. It can be seen that excellent characteristics such as voltage and stability are exhibited.
- the capping layer (light efficiency improvement layer)
- a device consisting of only a single layer of a high refractive index (n> 1.69 @ 620 nm) compound, a high refractive index (n > 1.69 @ 620 nm) compound, and a low refractive index (n ⁇ 1.69 @ 620 nm) compound
- the multi-layered capping layer (light efficiency improving layer) can increase the efficiency.
- the efficiency is improved when the material of the present invention is used as a multilayer compared to the device (Comparative Example 2) using Alq 3 for the capping layer (light efficiency improving layer).
- the organic electroluminescent device using the compound of the present invention having a high refractive index (high refractive index) and a low refractive index (low refractive index) as a double layer has higher efficiency than a single layer of REF01 having a high refractive index. It's obvious.
- the compound of Formula 1 has unexpectedly desirable properties for use as a low refractive index capping layer in an OLED.
- the compound of the present invention can be applied to industrial organic electronic device products due to these properties.
- the above-described synthesis example is an example, and the reaction conditions may be changed as needed.
- the compound according to an embodiment of the present invention may be synthesized to have various substituents using methods and materials known in the art. By introducing various substituents into the core structure represented by Formula 1, it may have properties suitable for use in an organic electroluminescent device.
- the organic compound according to the present invention may be used to improve the quality of an organic electroluminescent device by being used in an organic material layer and/or a capping layer of the organic electroluminescent device.
- the organic electroluminescent device When the compound is used in the capping layer, the organic electroluminescent device exhibits original characteristics and at the same time, the lifespan can be improved by the optical characteristics of the compound.
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Abstract
Description
구분 | 화합물 | n(460nm) | n(620nm) |
비교시험예 1 | Alq3 | 1.808 | 1.690 |
비교시험예 2 | REF01 | 1.986 | 1.846 |
시험예 1 | 6-9 (LT20-30-477) |
1.512 | 1.501 |
시험예 2 | 6-10 (LT20-30-445) |
1.469 | 1.458 |
시험예 3 | 6-13 (LT20-30-439) |
1.436 | 1.429 |
시험예 4 | 6-16 (LT20-30-360) |
1.398 | 1.396 |
시험예 5 | 6-24 (LT20-30-454) |
1.587 | 1.545 |
시험예 6 | 6-56 (LT20-30-358) |
1.708 | 1.643 |
시험예 7 | 6-61 (LT20-30-451) |
1.568 | 1.544 |
시험예 8 | 6-64 (LT20-30-457) |
1.469 | 1.447 |
시험예 9 | 6-74 (LT20-30-052) |
1.440 | 1.419 |
시험예 10 | 6-78 (LT20-30-046) |
1.441 | 1.423 |
시험예 11 | 6-80 (LT20-30-072) |
1.497 | 1.468 |
시험예 12 | 6-82 (LT20-30-142) |
1.517 | 1.476 |
시험예 13 | 6-86 (LT20-30-053) |
1.587 | 1.545 |
시험예 14 | 6-88 (LT20-30-129) |
1.464 | 1.439 |
시험예 15 | 6-117 (LT20-30-473) |
1.486 | 1.452 |
시험예 16 | 6-120 (LT20-30-484) |
1.425 | 1.418 |
시험예 17 | 6-141 (LT20-30-435) |
1.538 | 1.513 |
시험예 18 | 6-149 (LT20-30-438) |
1.616 | 1.589 |
시험예 19 | 6-152 (LT20-30-434) |
1.448 | 1.439 |
시험예 20 | 6-192 (LT20-30-466) |
1.466 | 1.450 |
시험예 21 | 6-212 (LT20-30-478) |
1.464 | 1.443 |
시험예 22 | 6-227 (LT20-30-450) |
1.703 | 1.637 |
시험예 23 | 6-230 (LT20-30-443) |
1.512 | 1.479 |
시험예 24 | 6-243 (LT20-30-486) |
1.585 | 1.536 |
시험예 25 | 6-246 (LT20-30-514) |
1.442 | 1.429 |
시험예 26 | 6-268 (LT20-30-442) |
1.514 | 1.483 |
시험예 27 | 6-284 (LT20-35-003) |
1.568 | 1.544 |
시험예 28 | 6-340 (LT20-35-005) |
1.484 | 1.453 |
시험예 29 | 6-364 (LT20-30-461) |
1.475 | 1.450 |
시험예 30 | 6-461 (LT18-30-479) |
1.414 | 1.400 |
시험예 31 | 6-463 (LT20-35-987) |
1.538 | 1.513 |
시험예 32 | 6-471 (LT19-30-167) |
1.616 | 1.589 |
시험예 33 | 6-491 (LT20-35-985) |
1.585 | 1.536 |
시험예 34 | 6-505 (LT20-35-988) |
1.703 | 1.637 |
시험예 35 | 6-513 (LT20-35-984) |
1.616 | 1.589 |
구분 | 화합물 | 구동전압 [V] |
효율 [cd/A] |
수명 [%] |
비교실시예 1 | - | 4.51 | 4.22 | 89.21 |
비교실시예 2 | Alq3 단독 | 4.50 | 4.83 | 88.92 |
실시예 1 | 6-9 (LT20-30-477) |
4.51 | 5.31 | 95.61 |
실시예 2 | 6-10 (LT20-30-445) |
4.49 | 5.53 | 95.61 |
실시예 3 | 6-13 (LT20-30-439) |
4.40 | 5.81 | 97.32 |
실시예 4 | 6-16 (LT20-30-360) |
4.42 | 6.11 | 97.54 |
실시예 5 | 6-24 (LT20-30-454) |
4.49 | 5.43 | 95.55 |
실시예 6 | 6-56 (LT20-30-358) |
4.49 | 5.53 | 95.61 |
실시예 7 | 6-61 (LT20-30-451) |
4.40 | 6.00 | 98.11 |
실시예 8 | 6-64 (LT20-30-457) |
4.42 | 6.11 | 97.54 |
실시예 9 | 6-74 (LT20-30-052) |
4.45 | 6.55 | 97.45 |
실시예 10 | 6-78 (LT20-30-046) |
4.47 | 6.32 | 98.13 |
실시예 11 | 6-80 (LT20-30-072) |
4.42 | 6.11 | 97.54 |
실시예 12 | 6-82 (LT20-30-142) |
4.41 | 6.23 | 97.55 |
실시예 13 | 6-86 (LT20-30-053) |
4.49 | 5.53 | 95.61 |
실시예 14 | 6-88 (LT20-30-129) |
4.50 | 6.22 | 95.67 |
실시예 15 | 6-117 (LT20-30-473) |
4.52 | 6.21 | 95.52 |
실시예 16 | 6-120 (LT20-30-484) |
4.40 | 5.81 | 97.32 |
실시예 17 | 6-141 (LT20-30-435) |
4.41 | 6.23 | 97.55 |
실시예 18 | 6-149 (LT20-30-438) |
4.42 | 6.11 | 97.54 |
실시예 19 | 6-152 (LT20-30-434) |
4.47 | 6.32 | 98.13 |
실시예 20 | 6-192 (LT20-30-466) |
4.42 | 6.11 | 97.00 |
실시예 21 | 6-212 (LT20-30-478) |
4.45 | 6.13 | 97.45 |
실시예 22 | 6-227 (LT20-30-450) |
4.50 | 6.15 | 97.32 |
실시예 23 | 6-230 (LT20-30-443) |
4.41 | 6.20 | 97.75 |
실시예 24 | 6-243 (LT20-30-486) |
4.51 | 5.31 | 95.61 |
실시예 25 | 6-246 (LT20-30-514) |
4.45 | 6.13 | 96.80 |
실시예 26 | 6-268 (LT20-30-442) |
4.38 | 5.53 | 97.40 |
실시예 27 | 6-284 (LT20-35-003) |
4.51 | 5.31 | 95.61 |
실시예 28 | 6-340 (LT20-35-005) |
4.40 | 6.25 | 97.42 |
실시예 29 | 6-364 (LT20-30-461) |
4.41 | 6.23 | 97.55 |
실시예 30 | 6-461 (LT18-30-479) |
4.42 | 6.65 | 98.00 |
실시예 31 | 6-463 (LT20-35-987) |
4.50 | 6.15 | 97.32 |
실시예 32 | 6-471 (LT19-30-167) |
4.52 | 6.21 | 95.52 |
실시예 33 | 6-491 (LT20-35-985) |
4.49 | 5.53 | 95.61 |
실시예 34 | 6-505 (LT20-35-988) |
4.50 | 6.15 | 97.32 |
실시예 35 | 6-513 (LT20-35-984) |
4.52 | 6.21 | 95.52 |
Claims (5)
- 하기 화학식 1로 표시되는, 유기전계발광소자 용 유기화합물.[화학식 1]상기 화학식 1에 있어서,W1 내지 W5는 각각 독립적으로 N 또는 CRa 이고,Ra는 H, F, CF3 및 Si(CH3)3 중에서 선택되고,L1 및 L2는 각각 독립적으로, 페닐렌기, 피리딜렌기 및 나프탈렌기 중에서 선택되며,m은 0 또는 1이고,n은 1 내지 5의 정수이고,Ar1은 페닐기; F, CF3, 또는 Si(CH3)3로 치환된 페닐기; 피리딜기; 나프틸기; 퀴놀린기; 이소퀴놀린기; 디벤조퓨란기; 디벤조티오펜기; 벤조옥사졸기; 벤조티아졸기; 및 벤조이미다졸기; 중에서 선택되는 어느 하나이다.
- 제 1항에 있어서,상기 화학식 1의 화합물은 화학식 2 내지 화학식 5 중 어느 하나로 표시되는 유기전계발광소자 용 유기화합물.[화학식 2][화학식 3][화학식 4][화학식 5]상기 화학식 2 내지 화학식 5에 있어서,Z1 및 Z2는 각각 독립적으로 O 또는 S이며,X1 및 X2는 각각 독립적으로 CH 또는 N이고(X1 및 X2 중 적어도 하나는 CH임),X3 및 X4는 각각 독립적으로 CH 또는 N이고(X3 및 X4 중 적어도 하나는 CH임),R1는 H, F, CF3 및 Si(CH3)3 중에서 선택되고,p는 0 내지 5의 정수이고,W1 내지 W5, L1, L2, m 및 n은 상기 화학식 1에서 정의된 것과 같다.
- 제1 전극;상기 제1 전극 상에 배치된, 복수의 유기물층으로 구성된 유기물층;상기 유기물층 상에 배치된 제2 전극; 및상기 제2 전극 상에 배치된 캡핑층;을 포함하고,상기 유기물층 또는 캡핑층은 상기 제 1항 내지 제 3항 중 어느 한 항에 따른 유기화합물을 포함하는 유기전계발광소자.
- 제 4항에 있어서,상기 유기물층은 발광층과 전자수송층을 포함하고, 상기 전자수송층은 상기 유기화합물을 포함하는 유기전계발광소자.
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US18/271,449 US20240099131A1 (en) | 2021-01-22 | 2022-01-05 | Organic compound and organic electroluminescent device comprising same |
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KR20210141824A (ko) * | 2020-05-13 | 2021-11-23 | 주식회사 랩토 | 벤즈아졸 유도체 및 이를 포함한 유기전계발광소자 |
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- 2022-01-05 CN CN202280009410.5A patent/CN116710432A/zh active Pending
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US20240099131A1 (en) | 2024-03-21 |
CN116710432A (zh) | 2023-09-05 |
KR102612519B1 (ko) | 2023-12-12 |
EP4282861A1 (en) | 2023-11-29 |
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