KR20200092211A - Novel compound and organic light emitting device comprising the same - Google Patents
Novel compound and organic light emitting device comprising the same Download PDFInfo
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- KR20200092211A KR20200092211A KR1020190009487A KR20190009487A KR20200092211A KR 20200092211 A KR20200092211 A KR 20200092211A KR 1020190009487 A KR1020190009487 A KR 1020190009487A KR 20190009487 A KR20190009487 A KR 20190009487A KR 20200092211 A KR20200092211 A KR 20200092211A
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- compound
- light emitting
- layer
- emitting device
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- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 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
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- WXRGABKACDFXMG-UHFFFAOYSA-N trimethylborane Chemical group CB(C)C WXRGABKACDFXMG-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 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
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
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- 229910052720 vanadium Inorganic materials 0.000 description 1
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
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- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- HTPBWAPZAJWXKY-UHFFFAOYSA-L zinc;quinolin-8-olate Chemical compound [Zn+2].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 HTPBWAPZAJWXKY-UHFFFAOYSA-L 0.000 description 1
Images
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D307/91—Dibenzofurans; Hydrogenated dibenzofurans
-
- H01L51/0073—
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- H01L51/5012—
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/649—Aromatic compounds comprising a hetero atom
- H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
- H10K85/6574—Polycyclic condensed heteroaromatic hydrocarbons comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes
Abstract
Description
본 발명은 신규한 화합물 및 이를 포함하는 유기 발광 소자에 관한 것이다. The present invention relates to a novel compound and an organic light emitting device comprising the same.
일반적으로 유기 발광 현상이란 유기 물질을 이용하여 전기에너지를 빛에너지로 전환시켜주는 현상을 말한다. 유기 발광 현상을 이용하는 유기 발광 소자는 넓은 시야각, 우수한 콘트라스트, 빠른 응답 시간을 가지며, 휘도, 구동 전압 및 응답 속도 특성이 우수하여 많은 연구가 진행되고 있다. In general, the organic light emitting phenomenon refers to a phenomenon that converts electrical energy into light energy using an organic material. The organic light emitting device using the organic light emitting phenomenon has a wide viewing angle, excellent contrast, and fast response time, and has excellent luminance, driving voltage, and response speed characteristics, and thus many studies have been conducted.
유기 발광 소자는 일반적으로 양극과 음극 및 상기 양극과 음극 사이에 유기물 층을 포함하는 구조를 가진다. 상기 유기물 층은 유기 발광 소자의 효율과 안정성을 높이기 위하여 각기 다른 물질로 구성된 다층의 구조로 이루어진 경우가 많으며, 예컨대 정공주입층, 정공수송층, 발광층, 전자수송층, 전자주입층 등으로 이루어질 수 있다. 이러한 유기 발광 소자의 구조에서 두 전극 사이에 전압을 걸어주게 되면 양극에서는 정공이, 음극에서는 전자가 유기물층에 주입되게 되고, 주입된 정공과 전자가 만났을 때 엑시톤(exciton)이 형성되며, 이 엑시톤이 다시 바닥상태로 떨어질 때 빛이 나게 된다. The organic light emitting device generally has a structure including an anode and a cathode and an organic material layer between the anode and the cathode. In order to increase the efficiency and stability of the organic light emitting device, the organic material layer is often formed of a multi-layer structure composed of different materials, for example, may be formed of a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like. When a voltage is applied between two electrodes in the structure of the organic light emitting device, holes are injected at the anode and electrons are injected at the cathode, and excitons are formed when the injected holes meet the electrons. When it falls to the ground again, it will shine.
상기와 같은 유기 발광 소자에 사용되는 유기물에 대하여 새로운 재료의 개발이 지속적으로 요구되고 있다.The development of new materials for organic materials used in the organic light emitting device as described above is continuously required.
한편, 최근에는 공정 비용 절감을 위하여 기존의 증착 공정 대신 용액 공정, 특히 잉크젯 공정을 이용한 유기 발광 소자가 개발되고 있다. 초창기에는 모든 유기 발광 소자 층을 용액 공정으로 코팅하여 유기 발광 소자를 개발하려 하였으나 현재 기술로는 한계가 있어, 정구조 형태에서 HIL, HTL, EML만을 용액 공정으로 진행하고 추후 공정은 기존의 증착 공정을 활용하는 하이브리드(hybrid) 공정이 연구 중이다. Meanwhile, in order to reduce process costs, an organic light emitting device using a solution process, particularly an inkjet process, has been developed instead of a conventional deposition process. In the early days, all organic light-emitting device layers were coated with a solution process to develop an organic light-emitting device, but there are limitations in the current technology, so only HIL, HTL, and EML are used as a solution process in the form of a regular structure, and the subsequent process is an existing deposition process. A hybrid process that utilizes is being studied.
이에 본 발명에서는 유기 발광 소자에 사용될 수 있으면서 동시에 용액 공정으로 증착이 가능한 신규한 유기 발광 소자의 소재를 제공한다. Accordingly, the present invention provides a material for a novel organic light-emitting device that can be used in an organic light-emitting device and can be deposited by a solution process at the same time.
본 발명은 신규한 화합물 및 이를 포함하는 유기 발광 소자에 관한 것이다. The present invention relates to a novel compound and an organic light emitting device comprising the same.
본 발명은 하기 화학식 1로 표시되는 화합물을 제공한다:The present invention provides a compound represented by Formula 1:
[화학식 1][Formula 1]
상기 화학식 1에서, In Chemical Formula 1,
R1 및 R2는 각각 독립적으로 수소, 중수소, 치환 또는 비치환된 C1-30 알킬, 또는 치환 또는 비치환된 C6-30 아릴이고,R 1 and R 2 are each independently hydrogen, deuterium, substituted or unsubstituted C 1-30 alkyl, or substituted or unsubstituted C 6-30 aryl,
Ar1은 C10-30 아릴이고, 여기서 상기 Ar1은 1개 또는 2개의 R3, 및 0개 내지 2개의 R4로 치환되고,Ar 1 is C 10-30 aryl, wherein Ar 1 is substituted with 1 or 2 R 3 , and 0 to 2 R 4 ,
Ar2는 C10-30 아릴이고, 여기서 상기 Ar2은 1개 또는 2개의 R3, 및 0개 내지 2개의 R4로 치환되고,Ar 2 is C 10-30 aryl, wherein Ar 2 is substituted with 1 or 2 R 3 , and 0 to 2 R 4 ,
R3는 각각 독립적으로 C4-12 알킬이고,R 3 are each independently C 4-12 alkyl,
R4는 각각 독립적으로 C1-3 알킬이다.R 4 are each independently C 1-3 alkyl.
또한, 본 발명은 제1 전극; 상기 제1 전극과 대향하여 구비된 제2 전극; 및 상기 제1 전극과 상기 제2 전극 사이에 구비된 1층 이상의 유기물층을 포함하는 유기 발광 소자로서, 상기 유기물층 중 1층 이상은 상기 화학식 1로 표시되는 화합물을 포함하는 것인, 유기 발광 소자를 제공한다. In addition, the present invention is a first electrode; A second electrode provided to face the first electrode; And one or more organic material layers provided between the first electrode and the second electrode, wherein at least one layer of the organic material layer includes a compound represented by Chemical Formula 1. to provide.
상술한 화학식 1로 표시되는 화합물은 유기 발광 소자의 유기물 층의 재료로서 사용될 수 있으며, 유기 발광 소자에서 효율의 향상, 낮은 구동전압 및/또는 수명 특성을 향상시킬 수 있다. 특히, 상술한 화학식 1로 표시되는 화합물은 용액 공정에 적용할 수 있으며, 정공주입, 정공수송, 정공주입 및 수송, 발광, 전자수송, 또는 전자주입 재료로 사용될 수 있다.The compound represented by Chemical Formula 1 may be used as a material for the organic material layer of the organic light emitting device, and may improve efficiency, low driving voltage, and/or lifespan characteristics in the organic light emitting device. In particular, the compound represented by Chemical Formula 1 may be applied to a solution process, and may be used as a hole injection, hole transport, hole injection and transport, light emission, electron transport, or electron injection material.
도 1은 기판(1), 양극(2), 발광층(3), 음극(4)으로 이루어진 유기 발광 소자의 예를 도시한 것이다.
도 2는 기판 (1), 양극(2), 정공주입층(5), 정공수송층(6), 발광층(7), 전자수송층(8) 및 음극(4)로 이루어진 유기 발광 소자의 예를 도시한 것이다.FIG. 1 shows an example of an organic light emitting device including a
Figure 2 shows an example of an organic light emitting device consisting of a
이하, 본 발명의 이해를 돕기 위하여 보다 상세히 설명한다.Hereinafter, it will be described in more detail in order to help the understanding of the present invention.
본 명세서에서, 
본 명세서에서 "치환 또는 비치환된" 이라는 용어는 중수소; 할로겐기; 니트릴기; 니트로기; 히드록시기; 카보닐기; 에스테르기; 이미드기; 아미노기; 포스핀옥사이드기; 알콕시기; 아릴옥시기; 알킬티옥시기; 아릴티옥시기; 알킬술폭시기; 아릴술폭시기; 실릴기; 붕소기; 알킬기; 사이클로알킬기; 알케닐기; 아릴기; 아르알킬기; 아르알케닐기; 알킬아릴기; 알킬아민기; 아랄킬아민기; 헤테로아릴아민기; 아릴아민기; 아릴포스핀기; 또는 N, O 및 S 원자 중 1개 이상을 포함하는 헤테로고리기로 이루어진 군에서 선택된 1개 이상의 치환기로 치환 또는 비치환되거나, 상기 예시된 치환기 중 2 이상의 치환기가 연결된 치환 또는 비치환된 것을 의미한다. 예컨대, "2 이상의 치환기가 연결된 치환기"는 비페닐기일 수 있다. 즉, 비페닐기는 아릴기일 수도 있고, 2개의 페닐기가 연결된 치환기로 해석될 수 있다.The term "substituted or unsubstituted" in this specification is deuterium; Halogen group; Nitrile group; Nitro group; Hydroxy group; Carbonyl group; Ester groups; Imide group; Amino group; Phosphine oxide group; Alkoxy groups; Aryloxy group; Alkyl thioxy group; Arylthioxy group; Alkyl sulfoxy group; Aryl sulfoxyl group; Silyl group; Boron group; Alkyl groups; Cycloalkyl group; Alkenyl group; Aryl group; Aralkyl group; An alkenyl group; Alkyl aryl groups; Alkylamine groups; Aralkylamine group; Heteroarylamine group; Arylamine group; Arylphosphine group; Or substituted or unsubstituted with one or more substituents selected from the group consisting of heterocyclic groups containing one or more of N, O and S atoms, or substituted or unsubstituted with two or more substituents among the exemplified substituents above. . For example, "a substituent having two or more substituents" may be a biphenyl group. That is, the biphenyl group may be an aryl group or may be interpreted as a substituent to which two phenyl groups are connected.
본 명세서에서 카보닐기의 탄소수는 특별히 한정되지 않으나, 탄소수 1 내지 40인 것이 바람직하다. 구체적으로 하기와 같은 구조의 화합물이 될 수 있으나, 이에 한정되는 것은 아니다.In this specification, the number of carbon atoms of the carbonyl group is not particularly limited, but is preferably 1 to 40 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.
본 명세서에 있어서, 에스테르기는 에스테르기의 산소가 탄소수 1 내지 25의 직쇄, 분지쇄 또는 고리쇄 알킬기 또는 탄소수 6 내지 25의 아릴기로 치환될 수 있다. 구체적으로, 하기 구조식의 화합물이 될 수 있으나, 이에 한정되는 것은 아니다.In the present specification, the oxygen of the ester group may be substituted with a straight chain, branched or cyclic alkyl group having 1 to 25 carbon atoms or an aryl group having 6 to 25 carbon atoms. Specifically, it may be a compound of the following structural formula, but is not limited thereto.
본 명세서에 있어서, 이미드기의 탄소수는 특별히 한정되지 않으나, 탄소수 1 내지 25인 것이 바람직하다. 구체적으로 하기와 같은 구조의 화합물이 될 수 있으나, 이에 한정되는 것은 아니다.In this specification, the number of carbon atoms of the imide group is not particularly limited, but is preferably 1 to 25 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.
본 명세서에 있어서, 실릴기는 구체적으로 트리메틸실릴기, 트리에틸실릴기, t-부틸디메틸실릴기, 비닐디메틸실릴기, 프로필디메틸실릴기, 트리페닐실릴기, 디페닐실릴기, 페닐실릴기 등이 있으나 이에 한정되지 않는다. In the present specification, the silyl group is specifically trimethylsilyl group, triethylsilyl group, t-butyldimethylsilyl group, vinyldimethylsilyl group, propyldimethylsilyl group, triphenylsilyl group, diphenylsilyl group, phenylsilyl group, etc. However, it is not limited thereto.
본 명세서에 있어서, 붕소기는 구체적으로 트리메틸붕소기, 트리에틸붕소기, t-부틸디메틸붕소기, 트리페닐붕소기, 페닐붕소기 등이 있으나 이에 한정되지 않는다.In the present specification, the boron group is specifically a trimethyl boron group, a triethyl boron group, a t-butyldimethyl boron group, a triphenyl boron group, a phenyl boron group, and the like, but is not limited thereto.
본 명세서에 있어서, 할로겐기의 예로는 불소, 염소, 브롬 또는 요오드가 있다.In the present specification, examples of the halogen group include fluorine, chlorine, bromine or iodine.
본 명세서에 있어서, 상기 알킬기는 직쇄 또는 분지쇄일 수 있고, 탄소수는 특별히 한정되지 않으나 1 내지 40인 것이 바람직하다. 일 실시상태에 따르면, 상기 알킬기의 탄소수는 1 내지 20이다. 또 하나의 실시상태에 따르면, 상기 알킬기의 탄소수는 1 내지 10이다. 또 하나의 실시상태에 따르면, 상기 알킬기의 탄소수는 1 내지 6이다. 알킬기의 구체적인 예로는 메틸, 에틸, 프로필, n-프로필, 이소프로필, 부틸, n-부틸, 이소부틸, tert-부틸, sec-부틸, 1-메틸-부틸, 1-에틸-부틸, 펜틸, n-펜틸, 이소펜틸, 네오펜틸, tert-펜틸, 헥실, n-헥실, 1-메틸펜틸, 2-메틸펜틸, 4-메틸-2-펜틸, 3,3-디메틸부틸, 2-에틸부틸, 헵틸, n-헵틸, 1-메틸헥실, 사이클로펜틸메틸,사이클로헥틸메틸, 옥틸, n-옥틸, tert-옥틸, 1-메틸헵틸, 2-에틸헥실, 2-프로필펜틸, n-노닐, 2,2-디메틸헵틸, 1-에틸-프로필, 1,1-디메틸-프로필, 이소헥실, 2-메틸펜틸, 4-메틸헥실, 5-메틸헥실 등이 있으나, 이들에 한정되지 않는다.In the present specification, the alkyl group may be straight chain or branched chain, and carbon number is not particularly limited, but is preferably 1 to 40. According to an exemplary embodiment, the alkyl group has 1 to 20 carbon atoms. According to another exemplary embodiment, the alkyl group has 1 to 10 carbon atoms. According to another exemplary embodiment, the alkyl group has 1 to 6 carbon atoms. Specific examples of the alkyl group are methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1-ethyl-butyl, pentyl, n -Pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl , n-heptyl, 1-methylhexyl, cyclopentylmethyl, cyclohexylmethyl, octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2 -Dimethylheptyl, 1-ethyl-propyl, 1,1-dimethyl-propyl, isohexyl, 2-methylpentyl, 4-methylhexyl, 5-methylhexyl, and the like, but is not limited thereto.
본 명세서에 있어서, 상기 알케닐기는 직쇄 또는 분지쇄일 수 있고, 탄소수는 특별히 한정되지 않으나, 2 내지 40인 것이 바람직하다. 일 실시상태에 따르면, 상기 알케닐기의 탄소수는 2 내지 20이다. 또 하나의 실시상태에 따르면, 상기 알케닐기의 탄소수는 2 내지 10이다. 또 하나의 실시상태에 따르면, 상기 알케닐기의 탄소수는 2 내지 6이다. 구체적인 예로는 비닐, 1-프로페닐, 이소프로페닐, 1-부테닐, 2-부테닐, 3-부테닐, 1-펜테닐, 2-펜테닐, 3-펜테닐, 3-메틸-1-부테닐, 1,3-부타디에닐, 알릴, 1-페닐비닐-1-일, 2-페닐비닐-1-일, 2,2-디페닐비닐-1-일, 2-페닐-2-(나프틸-1-일)비닐-1-일, 2,2-비스(디페닐-1-일)비닐-1-일, 스틸베닐기, 스티레닐기 등이 있으나 이들에 한정되지 않는다.In the present specification, the alkenyl group may be a straight chain or a branched chain, and the number of carbon atoms is not particularly limited, but is preferably 2 to 40. According to one embodiment, the carbon number of the alkenyl group is 2 to 20. According to another exemplary embodiment, the alkenyl group has 2 to 10 carbon atoms. According to another exemplary embodiment, the alkenyl group has 2 to 6 carbon atoms. Specific examples include vinyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 3-methyl-1- Butenyl, 1,3-butadienyl, allyl, 1-phenylvinyl-1-yl, 2-phenylvinyl-1-yl, 2,2-diphenylvinyl-1-yl, 2-phenyl-2-( Naphthyl-1-yl)vinyl-1-yl, 2,2-bis(diphenyl-1-yl)vinyl-1-yl, steelbenyl group, styrenyl group, and the like, but are not limited thereto.
본 명세서에 있어서, 사이클로알킬기는 특별히 한정되지 않으나, 탄소수 3 내지 60인 것이 바람직하며, 일 실시상태에 따르면, 상기 사이클로알킬기의 탄소수는 3 내지 30이다. 또 하나의 실시상태에 따르면, 상기 사이클로알킬기의 탄소수는 3 내지 20이다. 또 하나의 실시상태에 따르면, 상기 사이클로알킬기의 탄소수는 3 내지 6이다. 구체적으로 사이클로프로필, 사이클로부틸, 사이클로펜틸, 3-메틸사이클로펜틸, 2,3-디메틸사이클로펜틸, 사이클로헥실, 3-메틸사이클로헥실, 4-메틸사이클로헥실, 2,3-디메틸사이클로헥실, 3,4,5-트리메틸사이클로헥실, 4-tert-부틸사이클로헥실, 사이클로헵틸, 사이클로옥틸 등이 있으나, 이에 한정되지 않는다.In the present specification, the cycloalkyl group is not particularly limited, but preferably has 3 to 60 carbon atoms, and according to an exemplary embodiment, the cycloalkyl group has 3 to 30 carbon atoms. According to another exemplary embodiment, the cycloalkyl group has 3 to 20 carbon atoms. According to another exemplary embodiment, the cycloalkyl group has 3 to 6 carbon atoms. Specifically, cyclopropyl, cyclobutyl, cyclopentyl, 3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl, 3, 4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl, cyclooctyl, and the like, but is not limited thereto.
본 명세서에 있어서, 아릴기는 특별히 한정되지 않으나 탄소수 6 내지 60인 것이 바람직하며, 단환식 아릴기 또는 다환식 아릴기일 수 있다. 일 실시상태에 따르면, 상기 아릴기의 탄소수는 6 내지 30이다. 일 실시상태에 따르면, 상기 아릴기의 탄소수는 6 내지 20이다. 상기 아릴기가 단환식 아릴기로는 페닐기, 바이페닐기, 터페닐기 등이 될 수 있으나, 이에 한정되는 것은 아니다. 상기 다환식 아릴기로는 나프틸기, 안트라세닐기, 페난트릴기, 파이레닐기, 페릴레닐기, 크라이세닐기, 플루오레닐기 등이 될 수 있으나, 이에 한정되는 것은 아니다.In the present specification, the aryl group is not particularly limited, but is preferably 6 to 60 carbon atoms, and may be a monocyclic aryl group or a polycyclic aryl group. According to one embodiment, the carbon number of the aryl group is 6 to 30. According to one embodiment, the carbon number of the aryl group is 6 to 20. The aryl group may be a phenyl group, a biphenyl group, a terphenyl group, etc., as a monocyclic aryl group, but is not limited thereto. The polycyclic aryl group may be a naphthyl group, anthracenyl group, phenanthryl group, pyrenyl group, perylenyl group, chrysenyl group, fluorenyl group, and the like, but is not limited thereto.
본 명세서에 있어서, 플루오레닐기는 치환될 수 있고, 치환기 2개가 서로 결합하여 스피로 구조를 형성할 수 있다. 상기 플루오레닐기가 치환되는 경우, 
본 명세서에 있어서, 헤테로고리기는 이종 원소로 O, N, Si 및 S 중 1개 이상을 포함하는 헤테로고리기로서, 탄소수는 특별히 한정되지 않으나, 탄소수 2 내지 60인 것이 바람직하다. 헤테로고리기의 예로는 티오펜기, 퓨란기, 피롤기, 이미다졸기, 티아졸기, 옥사졸기, 옥사디아졸기, 트리아졸기, 피리딜기, 비피리딜기, 피리미딜기, 트리아진기, 아크리딜기, 피리다진기, 피라지닐기, 퀴놀리닐기, 퀴나졸린기, 퀴녹살리닐기, 프탈라지닐기, 피리도 피리미디닐기, 피리도 피라지닐기, 피라지노 피라지닐기, 이소퀴놀린기, 인돌기, 카바졸기, 벤조옥사졸기, 벤조이미다졸기, 벤조티아졸기, 벤조카바졸기, 벤조티오펜기, 디벤조티오펜기, 벤조퓨라닐기, 페난쓰롤린기(phenanthroline), 이소옥사졸릴기, 티아디아졸릴기, 페노티아지닐기 및 디벤조퓨라닐기 등이 있으나, 이들에만 한정되는 것은 아니다.In the present specification, the heterocyclic group is a heterocyclic group containing one or more of O, N, Si and S as heterogeneous elements, and the number of carbon atoms is not particularly limited, but is preferably 2 to 60 carbon atoms. Examples of the heterocyclic group include thiophene group, furan group, pyrrol group, imidazole group, thiazole group, oxazole group, oxadiazole group, triazole group, pyridyl group, bipyridyl group, pyrimidyl group, triazine group, acridil group , Pyridazine group, pyrazinyl group, quinolinyl group, quinazoline group, quinoxalinyl group, phthalazinyl group, pyridopyrimidinyl group, pyrido pyrazinyl group, pyrazino pyrazinyl group, isoquinoline group, indole group , Carbazole group, benzoxazole group, benzoimidazole group, benzothiazole group, benzocarbazole group, benzothiophene group, dibenzothiophene group, benzofuranyl group, phenanthroline group, isooxazolyl group, tiadiia A sleepy group, a phenothiazinyl group, and a dibenzofuranyl group, but are not limited thereto.
본 명세서에 있어서, 아르알킬기, 아르알케닐기, 알킬아릴기, 아릴아민기 중의 아릴기는 전술한 아릴기의 예시와 같다. 본 명세서에 있어서, 아르알킬기, 알킬아릴기, 알킬아민기 중 알킬기는 전술한 알킬기의 예시와 같다. 본 명세서에 있어서, 헤테로아릴아민 중 헤테로아릴은 전술한 헤테로고리기에 관한 설명이 적용될 수 있다. 본 명세서에 있어서, 아르알케닐기 중 알케닐기는 전술한 알케닐기의 예시와 같다. 본 명세서에 있어서, 아릴렌은 2가기인 것을 제외하고는 전술한 아릴기에 관한 설명이 적용될 수 있다. 본 명세서에 있어서, 헤테로아릴렌은 2가기인 것을 제외하고는 전술한 헤테로고리기에 관한 설명이 적용될 수 있다. 본 명세서에 있어서, 탄화수소 고리는 1가기가 아니고, 2개의 치환기가 결합하여 형성한 것을 제외하고는 전술한 아릴기 또는 사이클로알킬기에 관한 설명이 적용될 수 있다. 본 명세서에 있어서, 헤테로고리는 1가기가 아니고, 2개의 치환기가 결합하여 형성한 것을 제외하고는 전술한 헤테로고리기에 관한 설명이 적용될 수 있다.In the present specification, an aryl group in an aralkyl group, an alkenyl group, an alkylaryl group, and an arylamine group is the same as the example of the aryl group described above. In the present specification, the alkyl group among the aralkyl group, alkylaryl group, and alkylamine group is the same as the above-described alkyl group. In the present specification, heteroarylamine among heteroarylamines may be applied to the description of the aforementioned heterocyclic group. In the present specification, the alkenyl group among the alkenyl groups is the same as the exemplified alkenyl group. In the present specification, the description of the aryl group described above may be applied, except that the arylene is a divalent group. In the present specification, the description of the heterocyclic group described above may be applied, except that the heteroarylene is a divalent group. In the present specification, the hydrocarbon ring is not a monovalent group, and a description of the aryl group or cycloalkyl group described above may be applied, except that two substituents are formed by bonding. In the present specification, the heterocycle is not a monovalent group, and the description of the aforementioned heterocyclic group may be applied, except that two substituents are formed by bonding.
본 발명은 상기 화학식 1로 표시되는 화합물을 제공한다. 상기 화학식 1로 표시되는 화합물은 비대칭 구조이며, 알킬기를 가지고 있어 용액 공정에 사용되는 용매에 대한 용해도가 높고, 또한 이를 사용한 유기 발광 소자의 특성을 개선할 수 있다. The present invention provides a compound represented by
상기 화학식 1에서, 바람직하게는, R1 및 R2는 서로 동일하다. 바람직하게는, R1 및 R2는 각각 독립적으로, 메틸 또는 페닐이다. 보다 바람직하게는, R1 및 R2는 서로 동일하며, 메틸 또는 페닐이다.In
바람직하게는, Ar1 및 Ar2는 서로 동일하다. 이때, Ar1 및 Ar2가 서로 동일하다는 것은, Ar1 및 Ar2가 질소에 연결되는 위치 및 각각의 치환기 구조 및 치환기의 치환 위치까지 모두 동일한 것을 의미한다. Preferably, Ar 1 and Ar 2 are the same as each other. At this time, that Ar 1 and Ar 2 are the same as each other means that Ar 1 and Ar 2 are all identical to the position connected to nitrogen and the structure of each substituent and the substitution position of the substituent.
바람직하게는, Ar1은 비페닐릴, 터페닐릴, 쿼터페닐릴, 나프틸페닐, 페닐나프틸, 또는 나프틸이고, 여기서 상기 Ar1은 1개 또는 2개의 R3, 및 0개 내지 2개의 R4로 치환된다. Preferably, Ar 1 is biphenylyl, terphenylyl, quarterphenylyl, naphthylphenyl, phenylnaphthyl, or naphthyl, wherein Ar 1 is 1 or 2 R 3 , and 0 to 2 Dogs R 4 .
바람직하게는, Ar2는 비페닐릴, 터페닐릴, 쿼터페닐릴, 나프틸페닐, 페닐나프틸, 또는 나프틸이고, 여기서 상기 Ar2은 1개 또는 2개의 R3, 및 0개 내지 2개의 R4로 치환된다. Preferably, Ar 2 is biphenylyl, terphenylyl, quarterphenylyl, naphthylphenyl, phenylnaphthyl, or naphthyl, wherein Ar 2 is 1 or 2 R 3 , and 0 to 2 Dogs R 4 .
바람직하게는, Ar1 및 Ar2는 각각 독립적으로 하기로 구성되는 군으로부터 선택되는 어느 하나이다:Preferably, Ar 1 and Ar 2 are each independently any one selected from the group consisting of:
상기에서,In the above,
R3 및 R4는 앞서 정의한 바와 같으며, R 3 and R 4 are as defined above,
n은 1 또는 2이고,n is 1 or 2,
m은 0, 1 또는 2이다. m is 0, 1 or 2.
바람직하게는, R3는 각각 독립적으로 부틸, 이소부틸, 터트-부틸, 펜틸, 이소펜틸, 네오펜틸, 헥실, 옥틸, 또는 2,4,4-트리메틸펜탄-2-일이다. Preferably, R 3 are each independently butyl, isobutyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, octyl, or 2,4,4-trimethylpentan-2-yl.
바람직하게는, R4는 메틸이다. Preferably, R 4 is methyl.
상기 화학식 1로 표시되는 화합물의 대표적인 예는 하기와 같다:Representative examples of the compound represented by
상기 화학식 1로 표시되는 화합물 중 Ar1 및 Ar2가 서로 동일한 경우에는 하기 반응식 1과 같은 제조 방법으로 제조할 수 있으며, 나머지 화합물도 이를 응용하여 제조할 수 있다.When Ar 1 and Ar 2 among the compounds represented by
[반응식 1][Scheme 1]
상기 반응은 아민 치환 반응으로서, 팔라듐 촉매와 염기 존재하에 수행하는 것이 바람직하며, 아민 치환 반응을 위한 반응기는 당업계에 알려진 바에 따라 변경이 가능하다. 상기 제조 방법은 후술할 제조예에서 보다 구체화될 수 있다. The reaction is an amine substitution reaction, and is preferably performed in the presence of a palladium catalyst and a base, and the reactor for the amine substitution reaction can be modified as known in the art. The manufacturing method may be more specific in the manufacturing examples to be described later.
또한, 본 발명은 상기 화학식 1로 표시되는 화합물을 포함하는 유기 발광 소자를 제공한다. 일례로, 본 발명은 제1 전극; 상기 제1 전극과 대향하여 구비된 제2 전극; 및 상기 제1 전극과 상기 제2 전극 사이에 구비된 1층 이상의 유기물 층을 포함하는 유기 발광 소자로서, 상기 유기물층 중 1층 이상은 상기 화학식 1로 표시되는 화합물을 포함하는, 유기 발광 소자를 제공한다. In addition, the present invention provides an organic light emitting device comprising the compound represented by the formula (1). In one example, the present invention is a first electrode; A second electrode provided to face the first electrode; And an organic light emitting device including at least one layer of an organic material provided between the first electrode and the second electrode, wherein at least one layer of the organic material layer includes a compound represented by
본 발명의 유기 발광 소자의 유기물 층은 단층 구조로 이루어질 수도 있으나, 2층 이상의 유기물층이 적층된 다층 구조로 이루어질 수 있다. 예컨대, 본 발명의 유기 발광 소자는 유기물 층으로서 정공주입층, 정공수송층, 발광층, 전자수송층, 전자주입층 등을 포함하는 구조를 가질 수 있다. 그러나 유기 발광 소자의 구조는 이에 한정되지 않고 더 적은 수의 유기층을 포함할 수 있다.The organic material layer of the organic light emitting device of the present invention may have a single-layer structure, but may have a multi-layer structure in which two or more organic material layers are stacked. For example, the organic light emitting device of the present invention may have a structure including a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer as an organic material layer. However, the structure of the organic light emitting device is not limited to this, and may include fewer organic layers.
또한, 상기 유기물 층은 정공주입층, 정공수송층, 또는 정공 주입과 수송을 동시에 하는 층을 포함할 수 있고, 상기 정공주입층, 정공수송층, 또는 정공 주입과 수송을 동시에 하는 층은 상기 화학식 1로 표시되는 화합물을 포함한다. In addition, the organic material layer may include a hole injection layer, a hole transport layer, or a layer simultaneously performing hole injection and transport, and the hole injection layer, a hole transport layer, or a layer simultaneously performing hole injection and transport may be represented by
또한, 상기 유기물 층은 발광층을 포함할 수 있고, 상기 발광층은 상기 화학식 1로 표시되는 화합물을 포함한다. In addition, the organic material layer may include a light emitting layer, and the light emitting layer includes a compound represented by
또한, 상기 유기물 층은 전자수송층, 또는 전자주입층을 포함할 수 있고, 상기 전자수송층, 또는 전자주입층은 상기 화학식 1로 표시되는 화합물을 포함한다. Further, the organic material layer may include an electron transport layer or an electron injection layer, and the electron transport layer or the electron injection layer includes a compound represented by
또한, 상기 전자수송층, 전자주입층, 또는 전자수송 및 전자주입을 동시에 하는 층은 상기 화학식 1로 표시되는 화합물을 포함한다. In addition, the electron transport layer, the electron injection layer, or a layer that simultaneously performs electron transport and electron injection includes a compound represented by
또한, 상기 유기물 층은 발광층 및 전자수송층을 포함하고, 상기 전자수송층은 상기 화학식 1로 표시되는 화합물을 포함할 수 있다. In addition, the organic material layer includes a light emitting layer and an electron transport layer, and the electron transport layer may include a compound represented by
또한, 본 발명에 따른 유기 발광 소자는, 기판 상에 양극, 1층 이상의 유기물 층 및 음극이 순차적으로 적층된 구조(normal type)의 유기 발광 소자일 수 있다. 또한, 본 발명에 따른 유기 발광 소자는 기판 상에 음극, 1층 이상의 유기물 층 및 양극이 순차적으로 적층된 역방향 구조(inverted type)의 유기 발광 소자일 수 있다. 예컨대, 본 발명의 일실시예에 따른 유기 발광 소자의 구조는 도 1 및 2에 예시되어 있다.Further, the organic light emitting device according to the present invention may be an organic light emitting device having a structure (normal type) in which an anode, one or more organic material layers, and a cathode are sequentially stacked on a substrate. Further, the organic light emitting device according to the present invention may be an organic light emitting device of an inverted type in which a cathode, one or more organic material layers, and an anode are sequentially stacked on a substrate. For example, the structure of the organic light emitting device according to an embodiment of the present invention is illustrated in FIGS. 1 and 2.
도 1은 기판(1), 양극(2), 발광층(3), 음극(4)으로 이루어진 유기 발광 소자의 예를 도시한 것이다. 이와 같은 구조에 있어서, 상기 화학식 1로 표시되는 화합물은 상기 발광층에 포함될 수 있다. FIG. 1 shows an example of an organic light emitting device including a
도 2는 기판 (1), 양극(2), 정공주입층(5), 정공수송층(6), 발광층(7), 전자수송층(8) 및 음극(4)로 이루어진 유기 발광 소자의 예를 도시한 것이다. 이와 같은 구조에 있어서, 상기 화학식 1로 표시되는 화합물은 상기 정공주입층, 정공수송층, 발광층 및 전자수송층 중 1층 이상에 포함될 수 있다. FIG. 2 shows an example of an organic light emitting device comprising a
본 발명에 따른 유기 발광 소자는, 상기 유기물 층 중 1층 이상이 상기 화학식 1로 표시되는 화합물을 포함하는 것을 제외하고는 당 기술분야에 알려져 있는 재료와 방법으로 제조될 수 있다. 또한, 상기 유기 발광 소자가 복수개의 유기물층을 포함하는 경우, 상기 유기물층은 동일한 물질 또는 다른 물질로 형성될 수 있다. The organic light emitting device according to the present invention may be manufactured by materials and methods known in the art, except that at least one layer of the organic material layer includes the compound represented by
예컨대, 본 발명에 따른 유기 발광 소자는 기판 상에 제1 전극, 유기물층 및 제2 전극을 순차적으로 적층시켜 제조할 수 있다. 이때, 스퍼터링법(sputtering)이나 전자빔 증발법(e-beam evaporation)과 같은 PVD(physical Vapor Deposition)방법을 이용하여, 기판 상에 금속 또는 전도성을 가지는 금속 산화물 또는 이들의 합금을 증착시켜 양극을 형성하고, 그 위에 정공 주입층, 정공 수송층, 발광층 및 전자 수송층을 포함하는 유기물 층을 형성한 후, 그 위에 음극으로 사용할 수 있는 물질을 증착시켜 제조할 수 있다. 이와 같은 방법 외에도, 기판 상에 음극 물질부터 유기물층, 양극 물질을 차례로 증착시켜 유기 발광 소자를 만들 수 있다. For example, the organic light emitting device according to the present invention may be manufactured by sequentially stacking a first electrode, an organic material layer, and a second electrode on a substrate. At this time, a positive electrode is formed by depositing a metal or conductive metal oxide or an alloy thereof on a substrate using a physical vapor deposition (PVD) method such as sputtering or e-beam evaporation. Then, an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer is formed thereon, and a material that can be used as a cathode is deposited thereon. In addition to this method, an organic light emitting device may be formed by sequentially depositing a cathode material, an organic material layer, and a cathode material on a substrate.
또한, 상기 화학식 1로 표시되는 화합물은 유기 발광 소자의 제조시 진공 증착법 뿐만 아니라 용액 도포법에 의하여 유기물 층으로 형성될 수 있다. 특히, 상기 화학식 1로 표시되는 화합물은 용액 도포법에 사용되는 용매에 대한 용해도가 우수하여, 용액 도포법을 적용하기 용이하다. 여기서, 용액 도포법이라 함은 스핀 코팅, 딥코팅, 닥터 블레이딩, 잉크젯 프린팅, 스크린 프린팅, 스프레이법, 롤 코팅 등을 의미하지만, 이들만으로 한정되는 것은 아니다.In addition, the compound represented by
이에, 본 발명은 상기 화학식 1로 표시되는 화합물 및 용매를 포함하는 코팅 조성물을 제공한다. Accordingly, the present invention provides a coating composition comprising a compound represented by
상기 용매는 본 발명에 따른 화합물을 용해 또는 분산시킬 수 있는 용매이면 특별히 제한되지 않으며, 일례로 클로로포름, 염화메틸렌, 1,2-디클로로에탄, 1,1,2-트리클로로에탄, 클로로벤젠, o-디클로로벤젠 등의 염소계 용매; 테트라하이드로퓨란, 디옥산 등의 에테르계 용매; 톨루엔, 크실렌, 트리메틸벤젠, 메시틸렌 등의 방향족 탄화수소계 용매; 시클로헥산, 메틸시클로헥산, n-펜탄, n-헥산, n-헵탄, n-옥탄, n-노난, n-데칸 등의 지방족 탄화수소계 용매; 아세톤, 메틸에틸케톤, 시클로헥사논 등의 케톤계 용매; 아세트산에틸, 아세트산부틸, 에틸셀로솔브아세테이트 등의 에스테르계 용매; 에틸렌글리콜, 에틸렌글리콜모노부틸에테르, 에틸렌글리콜모노에틸에테르, 에틸렌글리콜모노메틸에테르, 디메톡시에탄, 프로필렌글리콜, 디에톡시메탄, 트리에틸렌글리콜모노에틸에테르, 글리세린, 1,2-헥산디올 등의 다가 알코올 및 그의 유도체; 메탄올, 에탄올, 프로판올, 이소프로판올, 시클로헥산올 등의 알코올계 용매; 디메틸술폭사이드 등의 술폭사이드계 용매; 및 N-메틸-2-피롤리돈, N,N-디메틸포름아미드 등의 아미드계 용매; 부틸벤조에이트, 메틸-2-메톡시벤조에이트 등의 벤조에이트계 용매; 테트랄린; 3-페녹시-톨루엔 등의 용매를 들 수 있다. 또한, 상술한 용매를 1종 단독으로 사용하거나 2종 이상의 용매를 혼합하여 사용할 수 있다. The solvent is not particularly limited as long as it is a solvent capable of dissolving or dispersing the compound according to the present invention, for example, chloroform, methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene, o -Chlorine-based solvents such as dichlorobenzene; Ether-based solvents such as tetrahydrofuran and dioxane; Aromatic hydrocarbon-based solvents such as toluene, xylene, trimethylbenzene, and mesitylene; Aliphatic hydrocarbon-based solvents such as cyclohexane, methylcyclohexane, n-pentane, n-hexane, n-heptane, n-octane, n-nonane, and n-decane; Ketone solvents such as acetone, methyl ethyl ketone, and cyclohexanone; Ester solvents such as ethyl acetate, butyl acetate, and ethyl cellosolve acetate; Polyvalent values of ethylene glycol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, dimethoxyethane, propylene glycol, diethoxymethane, triethylene glycol monoethyl ether, glycerin, 1,2-hexanediol, etc. Alcohols and derivatives thereof; Alcohol solvents such as methanol, ethanol, propanol, isopropanol, and cyclohexanol; Sulfoxide solvents such as dimethyl sulfoxide; And amide solvents such as N-methyl-2-pyrrolidone and N,N-dimethylformamide; Benzoate solvents such as butylbenzoate and methyl-2-methoxybenzoate; Tetralin; And solvents such as 3-phenoxy-toluene. In addition, the above-described solvents may be used alone or in combination of two or more solvents.
또한, 상기 코팅 조성물의 점도는 1 cP 내지 10 cP가 바람직하며, 상기의 범위에서 코팅이 용이하다. 또한, 상기 코팅 조성물 내 본 발명에 따른 화합물의 농도는 0.1 wt/v% 내지 20 wt/v%인 것이 바람직하다. In addition, the viscosity of the coating composition is preferably 1 cP to 10 cP, and the coating is easy in the above range. In addition, the concentration of the compound according to the present invention in the coating composition is preferably 0.1 wt/v% to 20 wt/v%.
또한, 본 발명은 상술한 코팅 조성물을 사용하여 기능층을 형성하는 방법을 제공한다. 구체적으로, 상술한 본 발명에 따른 코팅 조성물을 용액 공정으로 코팅하는 단계; 및 상기 코팅된 코팅 조성물을 열처리하는 단계를 포함한다. In addition, the present invention provides a method of forming a functional layer using the coating composition described above. Specifically, coating the coating composition according to the present invention described above by a solution process; And heat-treating the coated coating composition.
상기 열처리 단계에서 열처리 온도는 150 내지 230℃가 바람직하다. 또한, 상기 열처리 시간은 1분 내지 3시간이고, 보다 바람직하게는 10분 내지 1시간이다. 또한, 상기 열처리는 아르곤, 질소 등의 불활성 기체 분위기에서 수행하는 것이 바람직하다. In the heat treatment step, the heat treatment temperature is preferably 150 to 230°C. Further, the heat treatment time is 1 minute to 3 hours, more preferably 10 minutes to 1 hour. In addition, the heat treatment is preferably performed in an inert gas atmosphere such as argon or nitrogen.
일례로, 상기 제1 전극은 양극이고, 상기 제2 전극은 음극이거나, 또는 상기 제1 전극은 음극이고, 상기 제2 전극은 양극이다.In one example, the first electrode is an anode, the second electrode is a cathode, or the first electrode is a cathode, and the second electrode is an anode.
상기 양극 물질로는 통상 유기물 층으로 정공 주입이 원활할 수 있도록 일함수가 큰 물질이 바람직하다. 상기 양극 물질의 구체적인 예로는 바나듐, 크롬, 구리, 아연, 금과 같은 금속 또는 이들의 합금; 아연 산화물, 인듐 산화물, 인듐주석 산화물(ITO), 인듐아연 산화물(IZO)과 같은 금속 산화물; ZnO:Al 또는 SNO2:Sb와 같은 금속과 산화물의 조합; 폴리(3-메틸티오펜), 폴리[3,4-(에틸렌-1,2-디옥시)티오펜](PEDOT), 폴리피롤 및 폴리아닐린과 같은 전도성 고분자 등이 있으나, 이들에만 한정되는 것은 아니다. The positive electrode material is preferably a material having a large work function so that hole injection into the organic material layer is smooth. Specific examples of the positive electrode material include metals such as vanadium, chromium, copper, zinc and gold or alloys thereof; Metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), and indium zinc oxide (IZO); A combination of metal and oxide such as ZnO:Al or SNO 2 :Sb; Conductive polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDOT), polypyrrole and polyaniline, but are not limited thereto.
상기 음극 물질로는 통상 유기물층으로 전자 주입이 용이하도록 일함수가 작은 물질인 것이 바람직하다. 상기 음극 물질의 구체적인 예로는 마그네슘, 칼슘, 나트륨, 칼륨, 티타늄, 인듐, 이트륨, 리튬, 가돌리늄, 알루미늄, 은, 주석 및 납과 같은 금속 또는 이들의 합금; LiF/Al 또는 LiO2/Al과 같은 다층 구조 물질 등이 있으나, 이들에만 한정되는 것은 아니다. The cathode material is preferably a material having a small work function to facilitate electron injection into an organic material layer. Specific examples of the negative electrode material include metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin and lead, or alloys thereof; There is a multilayer structure material such as LiF/Al or LiO 2 /Al, but is not limited thereto.
상기 정공주입층은 전극으로부터 정공을 주입하는 층으로, 정공 주입 물질로는 정공을 수송하는 능력을 가져 양극에서의 정공 주입효과, 발광층 또는 발광재료에 대하여 우수한 정공 주입 효과를 갖고, 발광층에서 생성된 여기자의 전자주입층 또는 전자주입재료에의 이동을 방지하며, 또한, 박막 형성 능력이 우수한 화합물이 바람직하다. 정공 주입 물질의 HOMO(highest occupied molecular orbital)가 양극 물질의 일함수와 주변 유기물 층의 HOMO 사이인 것이 바람직하다. 정공 주입 물질의 구체적인 예로는 금속 포피린(porphyrin), 올리고티오펜, 아릴아민 계열의 유기물, 헥사니트릴헥사아자트리페닐렌 계열의 유기물, 퀴나크리돈(quinacridone)계열의 유기물, 페릴렌(perylene) 계열의 유기물, 안트라퀴논 및 폴리아닐린과 폴리티오펜 계열의 전도성 고분자 등이 있으나, 이들에만 한정 되는 것은 아니다. The hole injection layer is a layer for injecting holes from an electrode, and has the ability to transport holes as a hole injection material, and thus has a hole injection effect at an anode, an excellent hole injection effect for a light emitting layer or a light emitting material, and is produced in the light emitting layer. A compound which prevents migration of the excitons to the electron injection layer or the electron injection material, and has excellent thin film formation ability is preferable. It is preferable that the highest occupied molecular orbital (HOMO) of the hole injection material is between the work function of the positive electrode material and the HOMO of the surrounding organic material layer. Specific examples of the hole injection material include metal porphyrin, oligothiophene, arylamine-based organic substances, hexanitrile hexaazatriphenylene-based organic substances, quinacridone-based organic substances, and perylene-based substances. Organic materials, anthraquinones, and polyaniline and polythiophene-based conductive polymers, but are not limited thereto.
상기 정공수송층은 정공주입층으로부터 정공을 수취하여 발광층까지 정공을 수송하는 층으로, 정공 수송 물질로 양극이나 정공 주입층으로부터 정공을 수송받아 발광층으로 옮겨줄 수 있는 물질로 정공에 대한 이동성이 큰 물질이 적합하다. 구체적인 예로는 아릴아민 계열의 유기물, 전도성 고분자, 및 공액 부분과 비공액 부분이 함께 있는 블록 공중합체 등이 있으나, 이들에만 한정되는 것은 아니다. The hole transport layer is a layer that receives holes from the hole injection layer and transports holes from the hole injection layer to the light emitting layer. It is a material that transports holes from the anode or the hole injection layer as a hole transport material and transfers them to the light emitting layer. This is suitable. Specific examples include arylamine-based organic materials, conductive polymers, and block copolymers having a conjugated portion and a non-conjugated portion, but are not limited thereto.
상기 발광 물질로는 정공 수송층과 전자 수송층으로부터 정공과 전자를 각각 수송받아 결합시킴으로써 가시광선 영역의 빛을 낼 수 있는 물질로서, 형광이나 인광에 대한 양자 효율이 좋은 물질이 바람직하다. 구체적인 예로 8-히드록시-퀴놀린 알루미늄 착물(Alq3); 카르바졸 계열 화합물; 이량체화 스티릴(dimerized styryl) 화합물; BAlq; 10-히드록시벤조 퀴놀린-금속 화합물; 벤족사졸, 벤즈티아졸 및 벤즈이미다졸 계열의 화합물; 폴리(p-페닐렌비닐렌)(PPV) 계열의 고분자; 스피로(spiro) 화합물; 폴리플루오렌, 루브렌 등이 있으나, 이들에만 한정되는 것은 아니다. As the light-emitting material, a material capable of emitting light in the visible region by receiving and bonding holes and electrons from the hole transport layer and the electron transport layer, respectively, is preferably a material having good quantum efficiency for fluorescence or phosphorescence. Specific examples include 8-hydroxy-quinoline aluminum complex (Alq 3 ); Carbazole-based compounds; Dimerized styryl compounds; BAlq; 10-hydroxybenzo quinoline-metal compound; Benzoxazole, benzthiazole and benzimidazole compounds; Poly(p-phenylenevinylene) (PPV)-based polymers; Spiro compounds; Polyfluorene, rubrene, and the like, but are not limited to these.
상기 발광층은 호스트 재료 및 도펀트 재료를 포함할 수 있다. 호스트 재료는 축합 방향족환 유도체 또는 헤테로환 함유 화합물 등이 있다. 구체적으로 축합 방향족환 유도체로는 안트라센 유도체, 피렌 유도체, 나프탈렌 유도체, 펜타센 유도체, 페난트렌 화합물, 플루오란텐 화합물 등이 있고, 헤테로환 함유 화합물로는 카바졸 유도체, 디벤조퓨란 유도체, 래더형 퓨란 화합물, 피리미딘 유도체 등이 있으나, 이에 한정되지 않는다. 바람직하게는, 상기 호스트 재료로서 본 발명에 따른 화합물을 사용한다. The light emitting layer may include a host material and a dopant material. The host material may be a condensed aromatic ring derivative or a heterocyclic compound. Specifically, condensed aromatic ring derivatives include anthracene derivatives, pyrene derivatives, naphthalene derivatives, pentacene derivatives, phenanthrene compounds, fluoranthene compounds, etc., and heterocyclic compounds include carbazole derivatives, dibenzofuran derivatives, and ladder types Furan compounds, pyrimidine derivatives, and the like, but are not limited thereto. Preferably, a compound according to the present invention is used as the host material.
도펀트 재료로는 방향족 아민 유도체, 스트릴아민 화합물, 붕소 착체, 플루오란텐 화합물, 금속 착체 등이 있다. 구체적으로 방향족 아민 유도체로는 치환 또는 비치환된 아릴아미노기를 갖는 축합 방향족환 유도체로서, 아릴아미노기를 갖는 피렌, 안트라센, 크리센, 페리플란텐 등이 있으며, 스티릴아민 화합물로는 치환 또는 비치환된 아릴아민에 적어도 1개의 아릴비닐기가 치환되어 있는 화합물로, 아릴기, 실릴기, 알킬기, 사이클로알킬기 및 아릴아미노기로 이루어진 군에서 1 또는 2 이상 선택되는 치환기가 치환 또는 비치환된다. 구체적으로 스티릴아민, 스티릴디아민, 스티릴트리아민, 스티릴테트라아민 등이 있으나, 이에 한정되지 않는다. 또한, 금속 착체로는 이리듐 착체, 백금 착체 등이 있으나, 이에 한정되지 않는다.Examples of the dopant material include aromatic amine derivatives, strylamine compounds, boron complexes, fluoranthene compounds, and metal complexes. Specifically, the aromatic amine derivative is a condensed aromatic ring derivative having a substituted or unsubstituted arylamino group, and includes pyrene, anthracene, chrysene, periplanene, etc. having an arylamino group, and substituted or unsubstituted as a styrylamine compound. A compound in which at least one arylvinyl group is substituted with the arylamine, a substituent selected from 1 or 2 or more from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group, and an arylamino group is substituted or unsubstituted. Specifically, styrylamine, styryldiamine, styryltriamine, styryltetraamine, and the like, but are not limited thereto. In addition, metal complexes include, but are not limited to, iridium complexes, platinum complexes, and the like.
상기 전자수송층은 전자주입층으로부터 전자를 수취하여 발광층까지 전자를 수송하는 층으로 전자 수송 물질로는 음극으로부터 전자를 잘 주입 받아 발광층으로 옮겨줄 수 있는 물질로서, 전자에 대한 이동성이 큰 물질이 적합하다. 구체적인 예로는 8-히드록시퀴놀린의 Al 착물; Alq3를 포함한 착물; 유기 라디칼 화합물; 히드록시플라본-금속 착물 등이 있으나, 이들에만 한정되는 것은 아니다. 전자 수송층은 종래기술에 따라 사용된 바와 같이 임의의 원하는 캐소드 물질과 함께 사용할 수 있다. 특히, 적절한 캐소드 물질의 예는 낮은 일함수를 가지고 알루미늄층 또는 실버층이 뒤따르는 통상적인 물질이다. 구체적으로 세슘, 바륨, 칼슘, 이테르븀 및 사마륨이고, 각 경우 알루미늄 층 또는 실버층이 뒤따른다.The electron transport layer is a layer that receives electrons from the electron injection layer and transports electrons to the light emitting layer. As the electron transport material, a material capable of receiving electrons from the cathode and transferring them to the light emitting layer is suitable. Do. Specific examples include Al complexes of 8-hydroxyquinoline; Complexes including Alq 3 ; Organic radical compounds; Hydroxyflavone-metal complexes, and the like, but are not limited thereto. The electron transport layer can be used with any desired cathode material as used according to the prior art. In particular, examples of suitable cathode materials are conventional materials that have a low work function and are followed by an aluminum or silver layer. Specifically, cesium, barium, calcium, ytterbium and samarium, followed by an aluminum layer or a silver layer in each case.
상기 전자주입층은 전극으로부터 전자를 주입하는 층으로, 전자를 수송하는 능력을 갖고, 음극으로부터의 전자 주입 효과, 발광층 또는 발광 재료에 대하여 우수한 전자주입 효과를 가지며, 발광층에서 생성된 여기자의 정공주입층에의 이동을 방지하고, 또한, 박막형성능력이 우수한 화합물이 바람직하다. 구체적으로는 플루오레논, 안트라퀴노다이메탄, 다이페노퀴논, 티오피란 다이옥사이드, 옥사졸, 옥사다이아졸, 트리아졸, 이미다졸, 페릴렌테트라카복실산, 프레오레닐리덴 메탄, 안트론 등과 그들의 유도체, 금속 착체 화합물 및 질소 함유 5원환 유도체 등이 있으나, 이에 한정되지 않는다. The electron injection layer is a layer that injects electrons from an electrode, has the ability to transport electrons, has an electron injection effect from a cathode, an excellent electron injection effect on a light emitting layer or a light emitting material, and injects holes generated in the light emitting layer A compound that prevents migration to the layer and has excellent thin film forming ability is preferred. Specifically, fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, preorenylidene methane, anthrone and the like and their derivatives, metal Complex compounds, nitrogen-containing 5-membered ring derivatives, and the like, but are not limited thereto.
상기 금속 착체 화합물로서는 8-하이드록시퀴놀리나토 리튬, 비스(8-하이드록시퀴놀리나토)아연, 비스(8-하이드록시퀴놀리나토)구리, 비스(8-하이드록시퀴놀리나토)망간, 트리스(8-하이드록시퀴놀리나토)알루미늄, 트리스(2-메틸-8-하이드록시퀴놀리나토)알루미늄, 트리스(8-하이드록시퀴놀리나토)갈륨, 비스(10-하이드록시벤조[h]퀴놀리나토)베릴륨, 비스(10-하이드록시벤조[h]퀴놀리나토)아연, 비스(2-메틸-8-퀴놀리나토)클로로갈륨, 비스(2-메틸-8-퀴놀리나토)(o-크레졸라토)갈륨, 비스(2-메틸-8-퀴놀리나토)(1-나프톨라토)알루미늄, 비스(2-메틸-8-퀴놀리나토)(2-나프톨라토)갈륨 등이 있으나, 이에 한정되지 않는다.Examples of the metal complex compound include 8-hydroxyquinolinato lithium, bis(8-hydroxyquinolinato) zinc, bis(8-hydroxyquinolinato) copper, bis(8-hydroxyquinolinato) manganese, Tris(8-hydroxyquinolinato)aluminum, tris(2-methyl-8-hydroxyquinolinato)aluminum, tris(8-hydroxyquinolinato)gallium, bis(10-hydroxybenzo[h] Quinolinato) beryllium, bis(10-hydroxybenzo[h]quinolinato) zinc, bis(2-methyl-8-quinolinato)chlorogallium, bis(2-methyl-8-quinolinato)( There are o-cresolato) gallium, bis (2-methyl-8-quinolinato) (1-naphtholato) aluminum, bis (2-methyl-8-quinolinato) (2-naphtholato) gallium, It is not limited to this.
본 발명에 따른 유기 발광 소자는 사용되는 재료에 따라 전면 발광형, 후면 발광형 또는 양면 발광형일 수 있다.The organic light emitting device according to the present invention may be a front emission type, a back emission type, or a double-sided emission type, depending on the material used.
또한, 상기 화학식 1로 표시되는 화합물은 유기 발광 소자 외에도 유기 태양 전지 또는 유기 트랜지스터에 포함될 수 있다.In addition, the compound represented by
상기 화학식 1로 표시되는 화합물 및 이를 포함하는 유기 발광 소자의 제조는 이하 실시예에서 구체적으로 설명한다. 그러나 하기 실시예는 본 발명을 예시하기 위한 것이며, 본 발명의 범위가 이들에 의하여 한정되는 것은 아니다.The preparation of the compound represented by
[[ 실시예Example ]]
실시예Example 1: 화합물 BD1의 제조 1: Preparation of compound BD1
(1) 중간체 1-1의 제조(1) Preparation of intermediate 1-1
질소 분위기에서 250 mL 플라스크에 1-브로모-4-아이오도벤젠(2.83 g, 10 mmol), 4-(터트-부틸)페닐보론산(2.14 g, 12 mmol), 테트라키스트라이페닐포스핀 팔라듐(0)(0.25 g, 0.3 mmol), 탄산 칼슘(2.07 g, 15 mmol), THF(60 mL) 및 물(20 mL)을 넣고 80℃에서 8시간 동안 교반하였다. 반응이 종료되면 상온으로 식힌 다음 다이클로로메탄과 물을 이용하여 물질을 추출하고, 무수황산마그네슘으로 처리해 물을 제거한 후 여과하고 감압 농축하였다. 생성물은 노르말헥산과 다이클로로메탄을 이용하여 컬럼크로마토그래피 분리법으로 정제한 후 용매를 제거하였다. 다이클로로메탄과 메탄올으로 재결정하여 중간체 1-1(2.4 g, 수율 83%)을 얻었다.1-bromo-4-iodobenzene (2.83 g, 10 mmol), 4-(tert-butyl)phenylboronic acid (2.14 g, 12 mmol), tetrakistriphenylphosphine palladium in a 250 mL flask in a nitrogen atmosphere. (0) (0.25 g, 0.3 mmol), calcium carbonate (2.07 g, 15 mmol), THF (60 mL) and water (20 mL) were added and stirred at 80° C. for 8 hours. Upon completion of the reaction, the mixture was cooled to room temperature, extracted with dichloromethane and water, treated with anhydrous magnesium sulfate to remove water, filtered and concentrated under reduced pressure. The product was purified by column chromatography separation using normal hexane and dichloromethane, and then the solvent was removed. Recrystallization from dichloromethane and methanol gave intermediate 1-1 (2.4 g, yield 83%).
(2) 중간체 1-2의 제조(2) Preparation of Intermediate 1-2
질소 분위기에서 250 mL 플라스크에 중간체 1-1(2.4 g, 8.3 mmol), 4-아미노다이벤조[b,d]퓨란(1.52 g, 8.3 mmol), 비스(트리-터트-뷰틸포스핀) 팔라듐(0)(0.09 g, 0.17 mmol), 소듐터트뷰톡사이드(1.2 g, 12.5 mmol) 및 톨루엔(50 mL)을 넣고 100℃에서 5시간 동안 교반하였다. 반응이 종료되면 상온으로 식힌 다음 다이클로로메탄과 물을 이용하여 물질을 추출하고, 무수황산마그네슘으로 처리해 물을 제거한 후 여과하고 감압 농축하였다. 생성물은 노르말헥산과 다이클로로메탄을 이용하여 컬럼크로마토그래피 분리법으로 정제한 후 용매를 제거하였다. 다이클로로메탄과 메탄올으로 재결정하여 중간체 1-2(2.3 g, 수율 71%)을 얻었다.In a nitrogen atmosphere, in a 250 mL flask, intermediate 1-1 (2.4 g, 8.3 mmol), 4-aminodibenzo[b,d]furan (1.52 g, 8.3 mmol), bis(tri-tert-butylphosphine) palladium ( 0) (0.09 g, 0.17 mmol), sodium terbutoxide (1.2 g, 12.5 mmol) and toluene (50 mL) were added and stirred at 100° C. for 5 hours. Upon completion of the reaction, the mixture was cooled to room temperature, extracted with dichloromethane and water, treated with anhydrous magnesium sulfate to remove water, filtered and concentrated under reduced pressure. The product was purified by column chromatography separation using normal hexane and dichloromethane, and then the solvent was removed. Recrystallization with dichloromethane and methanol gave intermediate 1-2 (2.3 g, yield 71%).
(3) 화합물 BD1의 제조(3) Preparation of compound BD1
질소 분위기에서 250 mL 플라스크에 중간체 1-2(2.3 g, 5.9 mmol), 5,9-다이브로모-7,7-다이메틸-7H-벤조[c]플루오렌(1.17 g, 2.9 mmol), 비스(트리-터트-뷰틸포스핀)팔라듐(0)(0.03 g, 0.06 mmol), 소듐터트뷰톡사이드(0.7 g, 7.3 mmol) 및 톨루엔(50 mL)을 넣고 100℃에서 5시간 동안 교반하였다. 반응이 종료되면 상온으로 식힌 다음 다이클로로메탄과 물을 이용하여 물질을 추출하고, 무수황산마그네슘으로 처리해 물을 제거한 후 여과하고 감압 농축하였다. 생성물은 노르말헥산과 다이클로로메탄을 이용하여 컬럼크로마토그래피 분리법으로 정제한 후 용매를 제거해 화합물 BD1(1.5 g, 수율 51%)을 얻었다.Intermediate 1-2 (2.3 g, 5.9 mmol), 5,9-dibromo-7,7-dimethyl-7H-benzo[c]fluorene (1.17 g, 2.9 mmol), bis in a 250 mL flask in a nitrogen atmosphere. (Tri-tert-butylphosphine) palladium (0) (0.03 g, 0.06 mmol), sodium terbutoxide (0.7 g, 7.3 mmol) and toluene (50 mL) were added and stirred at 100° C. for 5 hours. Upon completion of the reaction, the mixture was cooled to room temperature, extracted with dichloromethane and water, treated with anhydrous magnesium sulfate to remove water, filtered and concentrated under reduced pressure. The product was purified by column chromatography separation using normal hexane and dichloromethane to remove the solvent to obtain compound BD1 (1.5 g, yield 51%).
MS[M+H]+= 1023.48MS[M+H] + = 1023.48
실시예Example 2: 화합물 BD2의 제조 2: Preparation of compound BD2
1-브로모-4-아이오도벤젠 대신 1-브로모-2,5-다이메틸-4-아이오도벤젠을 사용한 것을 제외하고는, 상기 화합물 BD1의 제조 방법과 동일한 방법으로 화합물 BD2(1.64 g, 수율 59%)를 얻었다.Compound BD2 (1.64 g) in the same manner as in the preparation method of Compound BD1, except that 1-bromo-2,5-dimethyl-4-iodobenzene was used instead of 1-bromo-4-iodobenzene. , Yield 59%).
MS[M+H]+= 1079.55MS[M+H] + = 1079.55
실시예Example 3: 화합물 BD7의 제조 3: Preparation of compound BD7
4-(터트-부틸)페닐보론산 대신 4-헥실페닐보론산을 사용한 것을 제외하고는, 상기 화합물 BD1의 제조 방법과 동일한 방법으로 화합물 BD7(1.71 g, 수율 55%)를 얻었다.Compound BD7 (1.71 g, yield 55%) was obtained by the same method as the method for preparing compound BD1, except that 4-hexylphenylboronic acid was used instead of 4-(tert-butyl)phenylboronic acid.
MS[M+H]+= 1079.55MS[M+H] + = 1079.55
실시예Example 4: 화합물 BD14의 제조 4: Preparation of compound BD14
4-(터트-부틸)페닐보론산 대신 4-이소부틸페닐보론산을 사용한 것을 제외하고는, 상기 화합물 BD1의 제조 방법과 동일한 방법으로 화합물 BD14(1.94 g, 수율 64%)를 얻었다.Compound BD14 (1.94 g, yield 64%) was obtained by the same method as the method for preparing compound BD1, except that 4-isobutylphenylboronic acid was used instead of 4-(tert-butyl)phenylboronic acid.
MS[M+H]+= 1023.48MS[M+H] + = 1023.48
실시예Example 5: 화합물 BD18의 제조 5: Preparation of compound BD18
4-(터트-부틸)페닐보론산 대신 (3,5-디-터트-부틸페닐)보론산을 사용한 것을 제외하고는, 상기 화합물 BD1의 제조 방법과 동일한 방법으로 화합물 BD18(2.01 g, 수율 63%)를 얻었다.Compound BD18 (2.01 g, yield 63) in the same manner as in the preparation method of Compound BD1, except that (3,5-di-tert-butylphenyl)boronic acid was used instead of 4-(tert-butyl)phenylboronic acid %).
MS[M+H]+= 1135.61MS[M+H] + = 1135.61
실시예Example 6: 화합물 BD26의 제조 6: Preparation of compound BD26
1-브로모-4-아이오도벤젠 대신 4-브로모-4'-아이오도비페닐을 사용한 것을 제외하고는, 상기 화합물 BD1의 제조 방법과 동일한 방법으로 화합물 BD26(2.24 g, 수율 57%)를 얻었다.Compound BD26 (2.24 g, yield 57%) was prepared in the same manner as in the preparation method of Compound BD1, except that 4-bromo-4'-iodobiphenyl was used instead of 1-bromo-4-iodobenzene. Got.
MS[M+H]+= 1175.55MS[M+H] + = 1175.55
실시예Example 7: 화합물 BD43의 제조 7: Preparation of compound BD43
5,9-다이브로모-7,7-다이메틸-7H-벤조[c]플루오렌 대신 5,9-다이브로모-7,7-다이페닐-7H-벤조[c]플루오렌을 사용한 것을 제외하고는, 상기 화합물 BD1의 제조 방법과 동일한 방법으로 화합물 BD43(2.33 g, 수율 60%)를 얻었다.5,9-dibromo-7,7-diphenyl-7H-benzo[c]fluorene instead of 5,9-dibromo-7,7-dimethyl-7H-benzo[c]fluorene In the same manner as in the production method of Compound BD1, Compound BD43 (2.33 g, yield 60%) was obtained.
MS[M+H]+= 1147.52MS[M+H] + = 1147.52
[[ 실험예Experimental Example ]]
실험예Experimental Example 1 One
ITO(indium tin oxide)가 1,500 Å의 두께로 박막 증착된 유리 기판을, 세제를 녹인 증류수에 넣고, 초음파로 세척하였다. ITO를 30분간 세척하였다. 이후, 증류수로 2회 반복하여 초음파 세척을 10분간 진행하였다. 증류수 세척이 끝난 후, 이소프로필알콜 및 아세톤의 용제로 초음파 세척을 각각 30분씩 하고 건조시킨 후, 상기 기판을 글러브박스로 수송시켰다. A glass substrate on which ITO (indium tin oxide) was thin-film-deposited to a thickness of 1,500 Å was placed in distilled water in which detergent was dissolved and washed with ultrasonic waves. ITO was washed for 30 minutes. Subsequently, ultrasonic washing was repeated for 10 minutes with distilled water twice. After washing with distilled water, ultrasonic cleaning was performed with a solvent of isopropyl alcohol and acetone for 30 minutes each, and after drying, the substrate was transferred to a glove box.
이렇게 준비된 ITO 투명 전극 위에 하기 화합물 A 및 화합물 IB(p-도판트)를 8:2의 중량비로 시클로헥사논(용매)에 2 wt%로 용해시킨 코팅 조성물을 스핀 코팅하여 300 Å 두께의 정공주입층을 형성하고, 질소 분위기 하에 핫플레이트에서 220℃ 및 30분 조건으로 코팅 조성물을 경화시켰다. 상기 정공주입층 상에, 하기 화합물 A를 톨루엔에 1 wt%로 녹인 조성물을 스핀 코팅하여 400 Å 두께의 정공수송층을 형성하였다. 이후, 질소 분위기 하에 핫플레이트에서 230℃ 및 30분 조건으로 코팅 조성물을 경화시켰다. 상기 정공수송층 상에, 하기 화합물 B와 앞서 제조한 화합물 BD2을 톨루엔에 0.6 wt%로 용해시킨 조성물(화합물 B: 화합물 BD2의 중량비 = 94:6)을 스핀 코팅하여 200 Å 두께의 발광층을 형성하고, 질소 분위기 하에 핫플레이트에서 120℃ 및 10분 조건으로 코팅 조성물을 경화시켰다. 이후, 진공증착기로 옮겨 상기 발광층 위에 하기 화합물 G(200 Å), LiF(12 Å) 및 Al(2000 Å)를 순차적으로 증착하여 유기 발광 소자를 제조하였다. On the ITO transparent electrode thus prepared, a coating composition obtained by dissolving 2 wt% of Compound A and Compound IB (p-dopant) in cyclohexanone (solvent) in a weight ratio of 8:2 was spin coated to inject holes of 300 mm thick. A layer was formed and the coating composition was cured on a hot plate under nitrogen atmosphere at 220° C. and 30 minutes. On the hole injection layer, a composition in which the following compound A was dissolved in toluene at 1 wt% was spin-coated to form a hole transport layer having a thickness of 400
상기의 과정에서 유기물의 증착 속도는 0.4 내지 0.7 Å/sec를 유지하였고, 캐소드의 LiF는 0.3 Å/ sec, 알루미늄은 2 Å/sec의 증착 속도를 유지하였으며, 증착시 진공도는 2×10-7 내지 5×10-8 torr를 유지하였다.In the above process, the deposition rate of the organic material was maintained at 0.4 to 0.7 Å/sec, the LiF of the cathode was maintained at 0.3 Å/sec, and the deposition rate of 2 2/sec for aluminum, and the vacuum degree during deposition was 2×10-7. To 5×10-8 torr.
실험예Experimental Example 2 내지 6 2 to 6
화합물 BD2 대신 하기 표 1에 기재된 화합물을 사용한 것을 제외하고는, 실험예 1과 동일한 방법으로 유기 발광 소자를 제조하였다.An organic light-emitting device was manufactured in the same manner as in Experimental Example 1, except that the compound shown in Table 1 below was used instead of the compound BD2.
비교실험예Comparative Experimental Example 1 내지 4 1 to 4
화합물 BD2 대신 하기 표 1에 기재된 화합물을 사용한 것을 제외하고는, 실험예 1과 동일한 방법으로 유기 발광 소자를 제조하였다. 하기 표 1에서 화합물 C, D, E 및 F는 각각 하기와 같다. An organic light-emitting device was manufactured in the same manner as in Experimental Example 1, except that the compound shown in Table 1 below was used instead of the compound BD2. In Table 1, compounds C, D, E and F are as follows.
상기 실험예 및 비교실험예에서 제조한 유기 발광 소자에 대하여, 10 mA/cm2의 전류 밀도에서 구동 전압, 최대 발광파장, 전류 효율, 및 전력 효율을 측정하여 그 결과를 하기 표 1에 나타내었다. For the organic light-emitting device manufactured in the Experimental Example and Comparative Experimental Example, the driving voltage, the maximum emission wavelength, the current efficiency, and the power efficiency were measured at a current density of 10 mA/cm 2 , and the results are shown in Table 1 below. .
(V)Driving voltage
(V)
(nm)Maximum emission wavelength
(nm)
(cd/A)Current efficiency
(cd/A)
(lm/W)Power efficiency
(lm/W)
상기 표 1에 나타난 바와 같이, 본 발명에 따른 화학식 1로 표시되는 화합물을 사용한 실험예 1 내지 6의 유기 발광 소자는 비교실험예 1 내지 4에 비하여, 저전압 및 고효율의 특성을 보이며, 유기 발광 소자에 적용 가능함을 확인할 수 있었다. As shown in Table 1, the organic light emitting devices of Experimental Examples 1 to 6 using the compound represented by
1: 기판
2: 양극
3: 발광층
4: 음극
5: 정공주입층
6: 정공수송층
7: 발광층
8: 전자수송층1: substrate 2: anode
3: light emitting layer 4: cathode
5: hole injection layer 6: hole transport layer
7: light emitting layer 8: electron transport layer
Claims (12)
[화학식 1]
상기 화학식 1에서,
R1 및 R2는 각각 독립적으로 수소, 중수소, 치환 또는 비치환된 C1-30 알킬, 또는 치환 또는 비치환된 C6-30 아릴이고,
Ar1은 C10-30 아릴이고, 여기서 상기 Ar1은 1개 또는 2개의 R3, 및 0개 내지 2개의 R4로 치환되고,
Ar2는 C10-30 아릴이고, 여기서 상기 Ar2은 1개 또는 2개의 R3, 및 0개 내지 2개의 R4로 치환되고,
R3는 각각 독립적으로 C4-12 알킬이고,
R4는 각각 독립적으로 C1-3 알킬이다.
Compound represented by the formula (1):
[Formula 1]
In Chemical Formula 1,
R 1 and R 2 are each independently hydrogen, deuterium, substituted or unsubstituted C 1-30 alkyl, or substituted or unsubstituted C 6-30 aryl,
Ar 1 is C 10-30 aryl, wherein Ar 1 is substituted with 1 or 2 R 3 , and 0 to 2 R 4 ,
Ar 2 is C 10-30 aryl, wherein Ar 2 is substituted with 1 or 2 R 3 , and 0 to 2 R 4 ,
R 3 are each independently C 4-12 alkyl,
R 4 are each independently C 1-3 alkyl.
R1 및 R2는 서로 동일한,
화합물.
According to claim 1,
R 1 and R 2 are the same as each other,
compound.
R1 및 R2는 각각 독립적으로, 메틸 또는 페닐인,
화합물.
According to claim 1,
R 1 and R 2 are each independently methyl or phenyl,
compound.
Ar1 및 Ar2는 서로 동일한,
화합물.
According to claim 1,
Ar 1 and Ar 2 are the same as each other,
compound.
Ar1은 비페닐릴, 터페닐릴, 쿼터페닐릴, 나프틸페닐, 페닐나프틸, 또는 나프틸이고,
여기서 상기 Ar1은 1개 또는 2개의 R3, 및 0개 내지 2개의 R4로 치환되는,
화합물.
According to claim 1,
Ar 1 is biphenylyl, terphenylyl, quarterphenylyl, naphthylphenyl, phenylnaphthyl, or naphthyl,
Wherein Ar 1 is substituted with 1 or 2 R 3 , and 0 to 2 R 4 ,
compound.
Ar2는 비페닐릴, 터페닐릴, 쿼터페닐릴, 나프틸페닐, 페닐나프틸, 또는 나프틸이고,
여기서, 상기 Ar2은 1개 또는 2개의 R3, 및 0개 내지 2개의 R4로 치환되는,
화합물.
According to claim 1,
Ar 2 is biphenylyl, terphenylyl, quarterphenylyl, naphthylphenyl, phenylnaphthyl, or naphthyl,
Here, Ar 2 is substituted with 1 or 2 R 3 , and 0 to 2 R 4 ,
compound.
Ar1 및 Ar2는 각각 독립적으로 하기로 구성되는 군으로부터 선택되는 어느 하나인,
화합물:
상기에서,
R3 및 R4는 제1항에서 정의한 바와 같으며,
n은 1 또는 2이고,
m은 0, 1 또는 2이다.
According to claim 1,
Ar 1 and Ar 2 are each independently any one selected from the group consisting of,
compound:
In the above,
R 3 and R 4 are as defined in claim 1,
n is 1 or 2,
m is 0, 1 or 2.
R3는 각각 독립적으로 부틸, 이소부틸, 터트-부틸, 펜틸, 이소펜틸, 네오펜틸, 헥실, 옥틸, 또는 2,4,4-트리메틸펜탄-2-일인,
화합물.
According to claim 1,
R 3 are each independently butyl, isobutyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, octyl, or 2,4,4-trimethylpentane-2-yl,
compound.
R4는 메틸인,
화합물.
According to claim 1,
R 4 is methyl,
compound.
상기 화학식 1로 표시되는 화합물은 하기로 구성되는 군으로부터 선택되는 어느 하나인,
화합물:
According to claim 1,
The compound represented by Formula 1 is any one selected from the group consisting of,
compound:
A first electrode; A second electrode provided to face the first electrode; And one or more organic material layers provided between the first electrode and the second electrode, wherein at least one layer of the organic material layer includes the compound according to any one of claims 1 to 10. That is, an organic light emitting device.
상기 화합물을 포함하는 유기물층은 발광층인,
유기 발광 소자.The method of claim 11,
The organic material layer containing the compound is a light emitting layer,
Organic light emitting device.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000051826A (en) | 1999-01-27 | 2000-08-16 | 성재갑 | New organomattalic complex molecule for the fabrication of organic light emitting diodes |
| KR20150079664A (en) * | 2012-11-02 | 2015-07-08 | 이데미쓰 고산 가부시키가이샤 | Organic electroluminescence element |
| KR20170023388A (en) * | 2015-08-21 | 2017-03-03 | 삼성디스플레이 주식회사 | Organic light emitting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000051826A (en) | 1999-01-27 | 2000-08-16 | 성재갑 | New organomattalic complex molecule for the fabrication of organic light emitting diodes |
| KR20150079664A (en) * | 2012-11-02 | 2015-07-08 | 이데미쓰 고산 가부시키가이샤 | Organic electroluminescence element |
| KR20170023388A (en) * | 2015-08-21 | 2017-03-03 | 삼성디스플레이 주식회사 | Organic light emitting device |
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