KR20140079993A - Blue phophorescene compounds and organic light emitting diode devices using the same - Google Patents

Blue phophorescene compounds and organic light emitting diode devices using the same Download PDF

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KR20140079993A
KR20140079993A KR1020120149289A KR20120149289A KR20140079993A KR 20140079993 A KR20140079993 A KR 20140079993A KR 1020120149289 A KR1020120149289 A KR 1020120149289A KR 20120149289 A KR20120149289 A KR 20120149289A KR 20140079993 A KR20140079993 A KR 20140079993A
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group
substituted
layer
light emitting
blue phosphorescent
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허혜령
신인애
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엘지디스플레이 주식회사
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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/30Coordination compounds
    • H10K85/341Transition metal complexes, e.g. Ru(II)polypyridine complexes
    • H10K85/342Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising iridium
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    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F15/00Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
    • C07F15/0006Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
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    • C09K2211/00Chemical nature of organic luminescent or tenebrescent compounds
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Abstract

A blue phosphorescent compound according to an embodiment of the present invention is represented by chemical formula 1. In chemical formula 1, R1 through R15 are one selected from the group consisting of a hydrogen, a deuterium, a halogen of F, Cl and Br, an alkyl group of C1-C20, an alkoxy group of C1-C20, a cycloalkyl group of C1-C20, a substituted or non-substituted aromatic group pf C6-C20, a substituted or non-substituted heterocyclic group of C5-C20, a cyano group, a trifluoromethyl group, an amine group of C1-C20, an amine group substituted with an aromatic group of C6-C20, an amine group substituted with a heterocyclic group of C5-C20 and a silyl group of C1-C20, independently.

Description

청색 인광 화합물 및 이를 사용한 유기전계발광소자{BLUE PHOPHORESCENE COMPOUNDS AND ORGANIC LIGHT EMITTING DIODE DEVICES USING THE SAME}TECHNICAL FIELD [0001] The present invention relates to a blue phosphorescent compound and an organic electroluminescent device using the blue phosphorescent compound.

본 발명은 청색 인광 화합물 및 이를 사용한 유기전계발광소자에 관한 것으로, 보다 자세하게는, 삼중항 에너지가 높은 고효율 청색 인광 화합물을 유기전계발광소자의 발광층의 도펀트로 사용하는 유기전계발광소자에 관한 것이다.
The present invention relates to a blue phosphorescent compound and an organic electroluminescent device using the same. More particularly, the present invention relates to an organic electroluminescent device using a high-efficiency blue phosphorescent compound having a high triplet energy as a dopant in a light emitting layer of an organic electroluminescent device.

최근, 표시장치(FPD: Flat Panel Display)는 멀티미디어의 발달과 함께 그 중요성이 증대되고 있다. 이에 부응하여 액정표시장치(Liquid Crystal Display : LCD), 플라즈마 디스플레이 패널(Plasma Display Panel: PDP), 전계방출표시장치(Field Emission Display: FED), 유기전계발광소자(Organic Light Emitting Diode Device) 등과 같은 여러 가지의 디스플레이가 실용화되고 있다.2. Description of the Related Art In recent years, the importance of a flat panel display (FPD) has been increasing with the development of multimedia. In accordance with this, a liquid crystal display (LCD), a plasma display panel (PDP), a field emission display (FED), an organic light emitting diode Various displays are put into practical use.

이 중 유기전계발광소자는 플라스틱 같은 유연한 기판 위에도 소자를 형성할 수 있을 뿐 아니라, 플라즈마 디스플레이 패널이나 무기전계발광 디스플레이에 비해 10V 이하의 낮은 전압에서 구동이 가능하고, 전력소모가 비교적 적으며 색감이 뛰어나다는 장점이 있다. 또한, 유기전계발광소자는 적색, 녹색 및 청색의 3가지 색을 나타낼 수 있어 풍부한 색을 표현하는 차세대 디스플레이 소자로 많은 사람들의 관심의 대상이 되고 있다.Among these organic electroluminescent devices, not only devices can be formed on a flexible substrate such as a plastic but also can be driven at a voltage as low as 10 V or less as compared with a plasma display panel or an inorganic electroluminescent display, It has the advantage of being excellent. In addition, organic electroluminescent devices can display three colors of red, green, and blue, which is a next generation display device that expresses rich colors, and has become a target of many people.

유기전계발광소자는 양극, 정공주입층, 정공수송층, 발광층, 전자수송층, 전자주입층 및 음극을 순차적으로 적층하여 형성할 수 있다. 발광 재료의 경우 양쪽 전극에서부터 주입된 전자와 정공의 재결합에 의해 여기자가 형성되며, 일중항 여기자의 경우 형광, 삼중항 여기자의 경우 인광에 관여하게 된다. 최근에는 형광에서 인광으로 발광 재료가 변경되는 추세에 있다. 이는 형광의 경우 발광층에서 형성되는 엑시톤 중에 약 25%의 단일항만이 빛을 만드는데 사용되고 75%의 삼중항은 대부분 열로 소실되는 반면, 인광 재료는 이를 모두 빛으로 전환 시키는 발광 메카니즘을 가지고 있기 때문이다.The organic electroluminescent device can be formed by sequentially laminating an anode, a hole injecting layer, a hole transporting layer, a light emitting layer, an electron transporting layer, an electron injecting layer and a cathode sequentially. In the case of the luminescent material, excitons are formed by recombination of electrons and holes injected from both electrodes. Fluorescence in singlet excitons and phosphorescence in triplet excitons are involved. In recent years, there is a tendency that a light emitting material is changed from fluorescence to phosphorescence. This is because only about 25% of the single excitons in the excitons formed in the light emitting layer are used to make light in the case of fluorescence, and 75% of the triplet is mostly lost to heat, while the phosphorescent material has a luminescent mechanism that converts them into light.

인광 소자의 발광 프로세스를 간단히 살펴 보면, 양극으로부터 주입된 홀과 음극으로부터 주입된 전자가 발광층의 호스트 물질에서 만나게 된다. 물론 도펀트에서 바로 홀과 전자쌍이 만나는 경우도 있지만 일반적으로 호스트의 농도가 높기 때문에 많은 양이 호스트에서 만나게 된다. 이때, 호스트에서 형성된 단일항 엑시톤은 도펀트의 단일항 또는 삼중항으로 에너지 전이가 일어나며, 삼중항 엑시톤은 도펀트의 삼중항으로 에너지 전이가 일어나게 된다. Briefly examining the light emitting process of the phosphorescent device, holes injected from the anode and electrons injected from the cathode are encountered in the host material of the light emitting layer. Of course, there are holes and electrons in the dopant, but in general, the amount of host is high, so a large amount of electrons are encountered in the host. At this time, a single-termed exciton formed in the host is energy-transferred to the single or triplet of the dopant, and the triplet exciton is transferred to the triplet of the dopant.

일단, 도펀트의 단일항으로 전이된 엑시톤은 다시 Inter system crossing을 통하여 도펀트의 삼중항으로 전이됨으로 모든 엑시톤의 1차 종착지는 도펀트의 삼중항 준위이다. 이렇게 형성된 엑시톤은 그라운드 상태(ground state)로 전이되며 빛을 발생한다. 이때 발광층 앞과 뒤에 인접한 정공 수송층 또는 전자 수송층의 삼중항 에너지가 도펀트의 삼중항 에너지보다 작을 경우는 도펀트 또는 호스트에서 이들 층으로 역 에너지 전이가 발생하여 효율을 급격히 떨어뜨린다. 따라서 발광층의 호스트 재료뿐만 아니라 정공/전자 이동층의 삼중항 에너지도 인광 소자에 있어 매우 중요한 역할을 한다. First, the exciton transited to a single term of the dopant is transited to the triplet state of the dopant again through the inter system crossing, so that the primary terminus of all the excitons is the triplet level of the dopant. The excitons thus formed transition to a ground state and emit light. When the triplet energies of the hole transporting layer or the electron transporting layer adjacent to the front and rear of the light emitting layer are smaller than the triplet energy of the dopant, reverse energy transfer occurs between the dopant or the host layer to reduce efficiency. Therefore, the triplet energy of the hole / electron transport layer as well as the host material of the light emitting layer plays an important role in the phosphorescent device.

유기전계발광소자의 고효율화를 위해서는 삼중항 엑시톤까지 모두 발광에 사용할 수 있는 인광 재료들만으로 발광층을 구성하는 것이 바람직하다. 하지만, 청색 인광 재료의 경우 디스플레이 장치에 적합한 수준의 고색순도를 가지는 물질이 개발되어 있지 않기 때문에 고 색순도를 가지는 청색 인광 도펀트 재료의 개발이 요구되고 있다.
In order to increase the efficiency of the organic electroluminescent device, it is preferable to form the luminescent layer only of phosphorescent materials which can be used for luminescence up to triplet excitons. However, in the case of a blue phosphorescent material, since a material having a high color purity suitable for a display device has not been developed, development of a blue phosphorescent dopant material having a high color purity is required.

따라서, 본 발명은 유기전계발광소자의 발광층에 신규한 청색 인광 화합물을 호스토로서 사용하여, 고효율의 유기전계발광소자를 제공하는데 그 목적이 있다.
Accordingly, it is an object of the present invention to provide a high efficiency organic electroluminescent device using a novel blue phosphorescent compound as a host in a light emitting layer of an organic electroluminescent device.

상기한 목적을 달성하기 위해, 본 발명의 일 실시예에 따른 청색 인광 화합물은 하기 화학식 1로 표시되는 것을 특징으로 한다. In order to achieve the above object, the blue phosphorescent compound according to one embodiment of the present invention is represented by the following formula (1).

[화학식 1][Chemical Formula 1]

Figure pat00001
Figure pat00001

상기 화학식 1에서, R1 내지 R15는 각각 독립적으로 수소, 중수소. F, Cl, Br의 할로겐, C1 내지 C20의 알킬기, C1 내지 C20의 알콕시기, C1 내지 C20의 사이클로 알킬기, C6 내지 C20의 치환 또는 비치환된 방향족 그룹, C5 내지 C20의 치환 또는 비치환된 이형고리 그룹, 시아노기, 트리플루오로메틸기, C1 내지 C20의 아민기, C6내지 C20의 방향족 그룹이 치환된 아민기, C5 내지 C20의 이형고리 그룹이 치환된 아민기 및 C1 내지 C20의 실릴기로부터 이루어진 군에서 선택된 어느 하나이다.In Formula 1, R 1 to R 15 each independently represent hydrogen, deuterium, A substituted or unsubstituted aromatic group of C 6 to C 20, a substituted or unsubstituted C 5 to C 20 heteroaromatic group, a substituted or unsubstituted C 6 to C 20 alkyl group, a substituted or unsubstituted C 6 to C 20 cycloalkyl group, a substituted or unsubstituted aromatic group of C 6 to C 20, A cyclic group, a cyano group, a trifluoromethyl group, an amine group of C1 to C20, an amine group substituted with an aromatic group of C6 to C20, an amine group substituted by a aliphatic cyclic group of C5 to C20 and a silyl group of C1 to C20 Or any combination thereof.

상기 청색 인광 화합물은 하기 표시되는 화합물들 중 선택된 어느 하나인 것을 특징으로 한다.The blue phosphorescent compound is characterized by being selected from among the compounds shown below.

Figure pat00002
Figure pat00002

Figure pat00003
Figure pat00003

Figure pat00004
Figure pat00004

Figure pat00005
Figure pat00005

Figure pat00006
Figure pat00006

Figure pat00007
Figure pat00007

상기 청색 인광 화합물은 하기 표시되는 화합물들 중 선택된 어느 하나인 것을 특징으로 한다.The blue phosphorescent compound is characterized by being selected from among the compounds shown below.

Figure pat00008
Figure pat00008

Figure pat00009
Figure pat00009

Figure pat00010
Figure pat00010

Figure pat00011
Figure pat00011

Figure pat00012
Figure pat00012

Figure pat00013
Figure pat00013

Figure pat00014
Figure pat00014

Figure pat00015
Figure pat00015

Figure pat00016
Figure pat00016

Figure pat00017
Figure pat00017

Figure pat00018
Figure pat00018

Figure pat00019
Figure pat00019

Figure pat00020
Figure pat00020

Figure pat00021
Figure pat00021

Figure pat00022
Figure pat00022

Figure pat00023
Figure pat00023

Figure pat00024
Figure pat00024

Figure pat00025
Figure pat00025

Figure pat00026
Figure pat00026

Figure pat00027
Figure pat00027

Figure pat00028
Figure pat00028

Figure pat00029
Figure pat00029

Figure pat00030
Figure pat00030

Figure pat00031
Figure pat00031

Figure pat00032
Figure pat00032

Figure pat00033
Figure pat00033

Figure pat00034
Figure pat00034

Figure pat00035
Figure pat00035

Figure pat00036
Figure pat00036

Figure pat00037
Figure pat00037

Figure pat00038
Figure pat00038

Figure pat00039
Figure pat00039

Figure pat00040
Figure pat00040

Figure pat00041
Figure pat00041

Figure pat00042
Figure pat00042

Figure pat00043
Figure pat00043

Figure pat00044
Figure pat00044

Figure pat00045
Figure pat00045

Figure pat00046
Figure pat00046

Figure pat00047
Figure pat00047

Figure pat00048
Figure pat00048

Figure pat00049
Figure pat00049

Figure pat00050
Figure pat00050

Figure pat00051
Figure pat00051

Figure pat00052
Figure pat00052

Figure pat00053
Figure pat00053

Figure pat00054
Figure pat00054

Figure pat00055
Figure pat00055

Figure pat00056
Figure pat00056

Figure pat00057
Figure pat00057

Figure pat00058
Figure pat00058

Figure pat00059
Figure pat00059

Figure pat00060
Figure pat00060

Figure pat00061
Figure pat00061

Figure pat00062
Figure pat00062

Figure pat00063
Figure pat00063

Figure pat00064
Figure pat00064

Figure pat00065
Figure pat00065

Figure pat00066
Figure pat00066

Figure pat00067
Figure pat00067

Figure pat00068
Figure pat00068

Figure pat00069
Figure pat00069

Figure pat00070
Figure pat00070

Figure pat00071
Figure pat00071

Figure pat00072
Figure pat00072

Figure pat00073
Figure pat00073

Figure pat00074
Figure pat00074

Figure pat00075
Figure pat00075

Figure pat00076
Figure pat00076

Figure pat00077
Figure pat00077

Figure pat00078
Figure pat00078

Figure pat00079
Figure pat00079

Figure pat00080
Figure pat00080

Figure pat00081
Figure pat00081

Figure pat00082
Figure pat00082

Figure pat00083
Figure pat00083

Figure pat00084
Figure pat00084

또한, 본 발명의 일 실시예에 따른 유기전계발광소자는 양극과 음극 사이에 형성된 유기막을 포함하는 유기전계발광소자에 있어서, 상기 유기막이 상기 청색 인광 화합물을 포함하는 것을 특징으로 한다.In addition, an organic electroluminescent device according to an embodiment of the present invention includes an organic layer formed between a cathode and an anode, wherein the organic layer includes the blue phosphorescent compound.

상기 유기막이 발광층인 것을 특징으로 한다.And the organic layer is a light emitting layer.

상기 청색 인광 화합물이 상기 발광층의 도펀트로 사용되는 것을 특징으로 한다.And the blue phosphorescent compound is used as a dopant of the light emitting layer.

상기 양극과 상기 음극 사이에 정공주입층, 정공수송층, 전자수송층 및 전자주입층 중 선택된 어느 하나 이상을 더 포함하는 것을 특징으로 한다.
And at least one selected from the group consisting of a hole injection layer, a hole transport layer, an electron transport layer and an electron injection layer between the anode and the cathode.

본 발명의 청색 인광 화합물 및 이를 사용한 유기전계발광소자는 삼중항 에너지가 높은 신규 청색 인광 화합물을 제조하고, 이를 유기전계발광소자의 발광층의 도펀트로 형성함으로써, 발광층에서의 에너지 전이를 용이하게 하여 청색의 발광효율을 향상시킬 수 있는 이점이 있다.
The blue phosphorescent compound of the present invention and the organic electroluminescent device using the same are prepared by preparing a novel blue phosphorescent compound having high triplet energy and forming it as a dopant of the luminescent layer of the organic electroluminescent device to facilitate energy transfer in the luminescent layer, The light emitting efficiency of the light emitting diode can be improved.

도 1은 본 발명의 일 실시예에 따른 유기전계발광소자를 나타낸 도면.
도 2는 본 발명의 화합물 1의 UV 흡수 스펙트럼과 상온에서의 PL 스펙트럼을 측정하여 나타낸 그래프.
도 3은 본 발명의 화합물 2의 UV 흡수 스펙트럼과 상온에서의 PL 스펙트럼을 측정하여 나타낸 그래프.
도 4는 본 발명의 화합물 3의 UV 흡수 스펙트럼과 상온에서의 PL 스펙트럼을 측정하여 나타낸 그래프.
1 is a view illustrating an organic electroluminescent device according to an embodiment of the present invention.
2 is a graph showing the UV absorption spectrum and the PL spectrum at room temperature of Compound 1 of the present invention.
3 is a graph showing the UV absorption spectrum and the PL spectrum at room temperature of Compound 2 of the present invention.
4 is a graph showing the UV absorption spectrum and the PL spectrum at room temperature of Compound 3 of the present invention.

이하, 첨부된 도면을 참조하여 본 발명의 다양한 실시 예들을 자세하게 설명하면 다음과 같다.Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 유기전계발광소자를 나타낸 도면이다.1 is a view illustrating an organic electroluminescent device according to an embodiment of the present invention.

도 1을 참조하면, 본 발명의 일 실시예에 따른 유기전계발광소자(100)는 양극(110), 정공주입층(120), 정공수송층(130), 발광층(140), 전자수송층(150), 전자주입층(160) 및 음극(170)을 포함할 수 있다.1, an organic electroluminescent device 100 according to an embodiment of the present invention includes an anode 110, a hole injection layer 120, a hole transport layer 130, a light emitting layer 140, an electron transport layer 150, An electron injecting layer 160, and a cathode 170. [0033]

상기 양극(110)은 정공을 주입하는 전극으로 일함수가 높은 ITO(Indium Tin Oxide), IZO(Indium Zinc Oxide) 또는 ZnO(Zinc Oxide) 중 어느 하나일 수 있다. 또한, 상기 양극(110)이 반사 전극일 경우에 양극(110)은 ITO, IZO 또는 ZnO 중 어느 하나로 이루어진 층 하부에 알루미늄(Al), 은(Ag) 또는 니켈(Ni) 중 어느 하나로 이루어진 반사층을 더 포함할 수 있다.The anode 110 may be any one of indium tin oxide (ITO), indium zinc oxide (IZO), and zinc oxide (ZnO). When the anode 110 is a reflective electrode, the anode 110 may have a reflective layer made of any one of aluminum (Al), silver (Ag), and nickel (Ni) under the layer made of any one of ITO, IZO, .

상기 정공주입층(120)은 양극(110)으로부터 발광층(140)으로 정공의 주입을 원활하게 하는 역할을 할 수 있으며, CuPc(cupper phthalocyanine), PEDOT(poly(3,4)-ethylenedioxythiophene), PANI(polyaniline) 및 NPD(N,N-dinaphthyl-N,N'-diphenyl benzidine)로 이루어진 군에서 선택된 어느 하나 이상으로 이루어질 수 있으나 이에 한정되지 않는다. The hole injection layer 120 may function to smoothly inject holes from the anode 110 into the light emitting layer 140. The hole injection layer 120 may be formed of cupper phthalocyanine (CuPc), poly (3,4) -ethylenedioxythiophene (PEDOT) polyaniline and NPD (N, N-dinaphthyl-N, N'-diphenyl benzidine), but the present invention is not limited thereto.

상기 정공주입층(120)의 두께는 1 내지 150nm일 수 있다. 여기서, 상기 정공주입층(120)의 두께가 1nm 이상이면, 정공 주입 특성이 저하되는 것을 방지할 수 있는 이점이 있고, 150nm 이하이면, 정공주입층(120)의 두께가 너무 두꺼워 정공의 이동을 향상시키기 위해 구동전압이 상승되는 것을 방지할 수 있는 이점이 있다.The thickness of the hole injection layer 120 may be 1 to 150 nm. If the thickness of the hole injection layer 120 is 1 nm or more, the hole injection characteristics can be prevented from being degraded. If the thickness is 150 nm or less, the thickness of the hole injection layer 120 is too thick, There is an advantage that it is possible to prevent the drive voltage from rising.

상기 정공수송층(130)은 정공의 수송을 원활하게 하는 역할을 하며, NPD(N,N-dinaphthyl-N,N'-diphenyl benzidine), TPD(N,N'-bis-(3-methylphenyl)-N,N'-bis-(phenyl)-benzidine), s-TAD 및 MTDATA(4,4',4"-Tris(N-3-methylphenyl-N-phenyl-amino)-triphenylamine)로 이루어진 군에서 선택된 어느 하나 이상으로 이루어질 수 있으나 이에 한정되지 않는다.The hole transport layer 130 plays a role of facilitating the transport of holes and may be formed by using NPD (N, N-dinaphthyl-N, N'-diphenyl benzidine), TPD (N, N'- N, N'-bis- (phenyl) -benzidine), s-TAD, and MTDATA (4,4 ', 4 "-tris (N-3-methylphenyl-N-phenylamino) -triphenylamine) But it is not limited thereto.

상기 정공수송층(130)의 두께는 1 내지 150nm일 수 있다. 여기서, 상기 정공수송층(130)의 두께가 5nm 이상이면, 정공 수송 특성이 저하되는 것을 방지할 수 있는 이점이 있고, 150nm 이하이면, 정공수송층(130)의 두께가 너무 두꺼워 정공의 이동을 향상시키기 위해 구동전압이 상승되는 것을 방지할 수 있는 이점이 있다.The thickness of the hole transport layer 130 may be 1 to 150 nm. Here, if the thickness of the hole transport layer 130 is 5 nm or more, the hole transport property can be prevented from being lowered. If the thickness is 150 nm or less, the thickness of the hole transport layer 130 is too thick, There is an advantage that the driving voltage can be prevented from rising.

상기 발광층(140)은 적색, 녹색 및 청색을 발광하는 물질로 이루어질 수 있으며, 인광 또는 형광물질을 이용하여 형성할 수 있다. 본 실시 예에서는 청색을 발광하는 인광 물질에 대해 설명한다.The light emitting layer 140 may be formed of a material that emits red, green, and blue light, and may be formed using phosphorescent or fluorescent materials. In this embodiment, a phosphor that emits blue light will be described.

본 발명의 발광층(140)은 호스트(host)와 도펀트(dopant)로 이루어진다. 보다 자세하게, 본 발명의 도펀트는 하기 화학식 1로 표시되는 청색 인광 화합물로 이루어진다.The light emitting layer 140 of the present invention comprises a host and a dopant. More specifically, the dopant of the present invention is composed of a blue phosphorescent compound represented by the following formula (1).

[화학식 1][Chemical Formula 1]

Figure pat00085
Figure pat00085

상기 화학식 1에서, R1 내지 R15는 각각 독립적으로 수소, 중수소. F, Cl, Br의 할로겐, C1 내지 C20의 알킬기, C1 내지 C20의 알콕시기, C1 내지 C20의 사이클로 알킬기, C6 내지 C20의 치환 또는 비치환된 방향족 그룹, C5 내지 C20의 치환 또는 비치환된 이형고리 그룹, 시아노기, 트리플루오로메틸기, C1 내지 C20의 아민기, C6내지 C20의 방향족 그룹이 치환된 아민기, C5 내지 C20의 이형고리 그룹이 치환된 아민기 및 C1 내지 C20의 실릴기로부터 이루어진 군에서 선택된 어느 하나일 수 있다.In Formula 1, R 1 to R 15 each independently represent hydrogen, deuterium, A substituted or unsubstituted aromatic group of C 6 to C 20, a substituted or unsubstituted C 5 to C 20 heteroaromatic group, a substituted or unsubstituted C 6 to C 20 alkyl group, a substituted or unsubstituted C 6 to C 20 cycloalkyl group, a substituted or unsubstituted aromatic group of C 6 to C 20, A cyclic group, a cyano group, a trifluoromethyl group, an amine group of C1 to C20, an amine group substituted with an aromatic group of C6 to C20, an amine group substituted by a aliphatic cyclic group of C5 to C20 and a silyl group of C1 to C20 May be any one selected from the group consisting of

상기 청색 인광 화합물은 하기 표시되는 화합물들 중 선택된 어느 하나일 수 있다.The blue phosphorescent compound may be selected from any of the compounds shown below.

Figure pat00086
Figure pat00086

Figure pat00087
Figure pat00087

Figure pat00088
Figure pat00088

Figure pat00089
Figure pat00089

Figure pat00090
Figure pat00090

Figure pat00091
Figure pat00091

상기 청색 인광 화합물은 하기 표시되는 화합물들 중 선택된 어느 하나일 수 있다.The blue phosphorescent compound may be selected from any of the compounds shown below.

Figure pat00092
Figure pat00092

Figure pat00093
Figure pat00093

Figure pat00094
Figure pat00094

Figure pat00095
Figure pat00095

Figure pat00096
Figure pat00096

Figure pat00097
Figure pat00097

Figure pat00098
Figure pat00098

Figure pat00099
Figure pat00099

Figure pat00100
Figure pat00100

Figure pat00101
Figure pat00101

Figure pat00102
Figure pat00102

Figure pat00103
Figure pat00103

Figure pat00104
Figure pat00104

Figure pat00105
Figure pat00105

Figure pat00106
Figure pat00106

Figure pat00107
Figure pat00107

Figure pat00108
Figure pat00108

Figure pat00109
Figure pat00109

Figure pat00110
Figure pat00110

Figure pat00111
Figure pat00111

Figure pat00112
Figure pat00112

Figure pat00113
Figure pat00113

Figure pat00114
Figure pat00114

Figure pat00115
Figure pat00115

Figure pat00116
Figure pat00116

Figure pat00117
Figure pat00117

Figure pat00118
Figure pat00118

Figure pat00119
Figure pat00119

Figure pat00120
Figure pat00120

Figure pat00121
Figure pat00121

Figure pat00122
Figure pat00122

Figure pat00123
Figure pat00123

Figure pat00124
Figure pat00124

Figure pat00125
Figure pat00125

Figure pat00126
Figure pat00126

Figure pat00127
Figure pat00127

Figure pat00128
Figure pat00128

Figure pat00129
Figure pat00129

Figure pat00130
Figure pat00130

Figure pat00131
Figure pat00131

Figure pat00132
Figure pat00132

Figure pat00133
Figure pat00133

Figure pat00134
Figure pat00134

Figure pat00135
Figure pat00135

Figure pat00136
Figure pat00136

Figure pat00137
Figure pat00137

Figure pat00138
Figure pat00138

Figure pat00139
Figure pat00139

Figure pat00140
Figure pat00140

Figure pat00141
Figure pat00141

Figure pat00142
Figure pat00142

Figure pat00143
Figure pat00143

Figure pat00144
Figure pat00144

Figure pat00145
Figure pat00145

Figure pat00146
Figure pat00146

Figure pat00147
Figure pat00147

Figure pat00148
Figure pat00148

Figure pat00149
Figure pat00149

Figure pat00150
Figure pat00150

Figure pat00151
Figure pat00151

Figure pat00152
Figure pat00152

Figure pat00153
Figure pat00153

Figure pat00154
Figure pat00154

Figure pat00155
Figure pat00155

Figure pat00156
Figure pat00156

Figure pat00157
Figure pat00157

Figure pat00158
Figure pat00158

Figure pat00159
Figure pat00159

Figure pat00160
Figure pat00160

Figure pat00161
Figure pat00161

Figure pat00162
Figure pat00162

Figure pat00163
Figure pat00163

Figure pat00164
Figure pat00164

Figure pat00165
Figure pat00165

Figure pat00166
Figure pat00166

Figure pat00167
Figure pat00167

Figure pat00168
Figure pat00168

발광층(140)은 호스트 100 중량%에 대해 도펀트가 0.1 내지 50 중량%으로 포함될 수 있다. The light emitting layer 140 may include a dopant in an amount of 0.1 to 50% by weight based on 100% by weight of the host.

상기 전자수송층(150)은 전자의 수송을 원활하게 하는 역할을 하며, Alq3(tris(8-hydroxyquinolino)aluminum), PBD, TAZ, spiro-PBD, BAlq 및 SAlq로 이루어진 군에서 선택된 어느 하나 이상으로 이루어질 수 있으나 이에 한정되지 않는다. The electron transport layer 150 serves to smooth the transport of electrons and is made of at least one selected from the group consisting of Alq3 (tris (8-hydroxyquinolino) aluminum), PBD, TAZ, spiro-PBD, BAlq, But is not limited thereto.

상기 전자수송층(150)의 두께는 1 내지 50nm일 수 있다. 여기서, 상기 전자수송층(150)의 두께가 1nm 이상이면, 전자 수송 특성이 저하되는 것을 방지할 수 있는 이점이 있고, 50nm 이하이면, 전자수송층(150)의 두께가 너무 두꺼워 전자의 이동을 향상시키기 위해 구동전압이 상승되는 것을 방지할 수 있는 이점이 있다.The thickness of the electron transport layer 150 may be 1 to 50 nm. If the thickness of the electron transporting layer 150 is 1 nm or more, the electron transporting property can be prevented from being degraded. If the thickness is 50 nm or less, the thickness of the electron transporting layer 150 is too thick, There is an advantage that the driving voltage can be prevented from rising.

상기 전자주입층(160)은 전자의 주입을 원활하게 하는 역할을 하며, Alq3(tris(8-hydroxyquinolino)aluminum), PBD, TAZ, spiro-PBD, BAlq 또는 SAlq를 사용할 수 있으나 이에 한정되지 않는다.The electron injection layer 160 serves to smooth the injection of electrons and may include Alq3 (tris (8-hydroxyquinolino) aluminum), PBD, TAZ, spiro-PBD, BAlq or SAlq.

상기 전자주입층(160)의 두께는 1 내지 50nm일 수 있다. 여기서, 상기 전자주입층(160)의 두께가 1nm 이상이면, 전자 주입 특성이 저하되는 것을 방지할 수 있는 이점이 있고, 50nm 이하이면, 전자주입층(160)의 두께가 너무 두꺼워 전자의 이동을 향상시키기 위해 구동전압이 상승되는 것을 방지할 수 있는 이점이 있다.The thickness of the electron injection layer 160 may be 1 to 50 nm. If the thickness of the electron injection layer 160 is 1 nm or more, there is an advantage that the electron injection characteristics can be prevented from being degraded. If the thickness is 50 nm or less, the thickness of the electron injection layer 160 is too thick, There is an advantage that it is possible to prevent the drive voltage from rising.

상기 음극(170)은 전자 주입 전극으로, 일함수가 낮은 마그네슘(Mg), 칼슘(Ca), 알루미늄(Al), 은(Ag) 또는 이들의 합금으로 이루어질 수 있다. 여기서, 음극(170)은 유기전계발광소자가 전면 또는 양면발광구조일 경우, 빛을 투과할 수 있을 정도로 얇은 두께로 형성할 수 있으며, 유기전계발광소자가 배면발광구조일 경우, 빛을 반사시킬 수 있을 정도로 두껍게 형성할 수 있다. The cathode 170 is an electron injection electrode and may be made of magnesium (Mg), calcium (Ca), aluminum (Al), silver (Ag), or an alloy thereof having a low work function. Here, when the organic electroluminescent device is a front or both-side light emitting structure, the cathode 170 may be formed to have a thickness thin enough to transmit light, and when the organic electroluminescent device is a back light emitting structure, It can be formed thick enough.

이하, 본 발명의 청색 인광 화합물의 합성예 및 이 화합물의 특성에 관하여 하기 합성예 및 실시예에서 상술하기로 한다. 다만, 하기의 실시예는 본 발명을 예시하는 것일 뿐 본 발명이 하기 실시예에 한정되는 것은 아니다.Hereinafter, the synthesis examples of the blue phosphorescent compound of the present invention and the characteristics of the compounds will be described in detail in Synthesis Examples and Examples below. However, the following examples are illustrative of the present invention, but the present invention is not limited to the following examples.

합성예 1 : 하기 화학식으로 표시되는 화합물 1의 제조Synthesis Example 1: Preparation of Compound 1 represented by the following formula

Figure pat00169
Figure pat00169

1) 리간드 전구체의 합성1) Synthesis of Ligand Precursor

Figure pat00170
Figure pat00170

벤즈이미다졸 5.0g(42mmol), 요오드화톨루엔 6.5ml(51mmol)을 요오드화구리(CuI) 0.80g(4.2mmol), 페난트롤린 1.5g(8.4mmol)의 DMF 용액(100ml)에 넣고 세슘카보네이트 28g(84mmol)을 넣어준 후 18시간 환류시킨다. 용액을 실온으로 식히고 실리카겔 패드를 이용하여 거른 후 여액을 감압하여 휘발물을 제거한다. 남은 잔류물을 컬럼크로마토그래피를 통하여 화합물 A 6.9g(78%)을 얻었다.(42 mmol) of benzimidazole and 6.5 ml (51 mmol) of toluene iodide were placed in a DMF solution (100 ml) of 0.80 g (4.2 mmol) of copper iodide (CuI) and 1.5 g (8.4 mmol) of phenanthroline, 84 mmol) was added thereto and refluxed for 18 hours. The solution is cooled to room temperature, filtered using a pad of silica gel, and the filtrate is reduced in pressure to remove volatiles. The remaining residue was subjected to column chromatography to obtain Compound A (6.9 g, 78%).

Figure pat00171
Figure pat00171

이어, 화합물 A 6.0g(29mmol)의 톨루엔(25ml) 용액에 요오드화메탄 2.0ml(32mmol)를 넣고 실온에서 다섯시간 동안 교반 후 용액을 걸러 5.8g의 침전물 B를 얻었다. 여액은 감압조건에서 휘발물을 제거하여 2.5g의 화합물 A를 얻고 여기에 다시 톨루엔 15ml과 요오드화메탄 0.82ml(13mmol)을 넣어 같은 반응을 반복, 3.1g의 B를 추가로 얻었다(88%). 얻어진 B는 에틸아세테이트로 반복하여 씻고 추가 정제과정 없이 다음 반응에 사용하였다.2.0 ml (32 mmol) of methane was added to a solution of 6.0 g (29 mmol) of Compound A in 25 ml of toluene, stirred at room temperature for 5 hours, and the solution was filtered to obtain 5.8 g of precipitate B. The filtrate was distilled under reduced pressure to obtain 2.5 g of Compound A. 15 ml of toluene and 0.82 ml (13 mmol) of iodomethane were added thereto, and the same reaction was repeated to obtain 3.1 g of B (88%). The resulting B was washed repeatedly with ethyl acetate and used in the next reaction without further purification.

2) 이리듐 화합물의 합성2) Synthesis of iridium compound

Figure pat00172
Figure pat00172

질소 분위기 하에서 화합물 B 5.0g(24 mmol), IrCl3 ·3H2O 1.78g(6.0mmol), Ag2O 4.7g(20mmol)을 2-에톡시에탄올 50ml에 넣고 24시간 동안 환류하여 교반하였다. 반응이 종료된 후, 침전물을 걸러내고 여과액을 감압조건 하에서 농축하였다. 잔류물은 다이클로로메탄/에탄올로 재침전하여 침전물 C를 얻었다. (16%)In an atmosphere of nitrogen compounds B 5.0g (24 mmol), IrCl 3 · 3H 2 O 1.78g (6.0mmol), Ag 2 O 4.7g (20mmol) is put into a 2-ethoxy ethanol 50ml and the mixture was stirred to reflux for 24 hours. After the reaction was completed, the precipitate was filtered off and the filtrate was concentrated under reduced pressure. The residue was redeposited in dichloromethane / ethanol to give a precipitate C. (16%)

Figure pat00173
Figure pat00173

질소 분위기 하에서 화합물 C 2.0g(1.6 mmol), D 0.5g(3.4mmol), K2CO3 0.47g(3.4mmol)을 2-에톡시에탄올 7ml에 넣고 12시간 동안 환류하여 교반하였다. 반응이 종료된 후, 침전물을 걸러내고 여과액을 감압조건 하에서 농축하였다. 잔류물은 컬럼크로마토그래피를 거쳐 화합물 1 0.4g을 얻었다. (32%)2.0 g (1.6 mmol) of the compound C, 0.5 g (3.4 mmol) of D and 0.47 g (3.4 mmol) of K 2 CO 3 were added to 7 ml of 2-ethoxyethanol under nitrogen atmosphere, and the mixture was refluxed for 12 hours and stirred. After the reaction was completed, the precipitate was filtered off and the filtrate was concentrated under reduced pressure. The residue was subjected to column chromatography to obtain 0.4 g of Compound 1. (32%)

합성예 2 : 하기 화학식으로 표시되는 화합물 2의 제조Synthesis Example 2: Preparation of Compound 2 represented by the following formula

Figure pat00174
Figure pat00174

1) 리간드 전구체의 합성1) Synthesis of Ligand Precursor

Figure pat00175
Figure pat00175

벤즈이미다졸 5.0g(42mmol), 4-플루오로아이오도벤젠 6.5ml(51mmol)을 요오드화구리(CuI) 0.80g(4.2mmol), 페난트롤린 1.5g(8.4mmol)의 DMF 용액(100ml)에 넣고 세슘카보네이트 28g(84mmol)을 넣어준 후 18시간 환류시킨다. 용액을 실온으로 식히고 실리카겔 패드를 이용하여 거른 후 여액을 감압하여 휘발물을 제거한다. 남은 잔류물을 컬럼크로마토그래피를 통하여 화합물 A 6.9g(78%)을 얻었다.(42 mmol) of benzimidazole and 6.5 ml (51 mmol) of 4-fluoroiodobenzene were added to a DMF solution (100 ml) of 0.80 g (4.2 mmol) of copper iodide (CuI) and 1.5 g (8.4 mmol) of phenanthroline And 28 g (84 mmol) of cesium carbonate is added thereto, followed by reflux for 18 hours. The solution is cooled to room temperature, filtered using a pad of silica gel, and the filtrate is reduced in pressure to remove volatiles. The remaining residue was subjected to column chromatography to obtain Compound A (6.9 g, 78%).

Figure pat00176
Figure pat00176

이어, 화합물 E 6.0g(29mmol)의 톨루엔(25ml) 용액에 요오드화메탄 2.0ml(32mmol)를 넣고 실온에서 다섯시간 동안 교반 후 용액을 걸러 5.8g의 침전물 F를 얻었다. 여액은 감압조건에서 휘발물을 제거하여 2.5g의 화합물 E를 얻고 여기에 다시 톨루엔 15ml과 요오드화메탄 0.82ml(13mmol)을 넣어 같은 반응을 반복, 3.1g의 F를 추가로 얻었다(88%). 얻어진 F는 에틸아세테이트로 반복하여 씻고 추가 정제과정 없이 다음 반응에 사용하였다.Then, 2.0 ml (32 mmol) of methane iodide was added to a toluene (25 ml) solution of 6.0 g (29 mmol) of Compound E, stirred for 5 hours at room temperature, and the solution was filtered to obtain 5.8 g of precipitate F. The filtrate was evaporated under reduced pressure to obtain 2.5 g of Compound E. 15 ml of toluene and 0.82 ml (13 mmol) of iodinated methane were added thereto, and the same reaction was repeated to obtain 3.1 g of F (88%). The resulting F was washed repeatedly with ethyl acetate and used in the next reaction without further purification.

2) 이리듐 화합물의 합성2) Synthesis of iridium compound

Figure pat00177
Figure pat00177

질소 분위기 하에서 화합물 F 5.0g(24 mmol), IrCl3 ·3H2O 1.78g(6.0mmol), Ag2O 4.7g(20mmol)을 2-에톡시에탄올 50ml에 넣고 24시간 동안 환류하여 교반하였다. 반응이 종료된 후, 침전물을 걸러내고 여과액을 감압조건 하에서 농축하였다. 잔류물은 다이클로로메탄/에탄올로 재침전하여 침전물 G를 얻었다. (16%)Under a nitrogen atmosphere compound F 5.0g (24 mmol), IrCl 3 · 3H 2 O 1.78g (6.0mmol), Ag 2 O 4.7g (20mmol) is put into a 2-ethoxy ethanol 50ml and the mixture was stirred to reflux for 24 hours. After the reaction was completed, the precipitate was filtered off and the filtrate was concentrated under reduced pressure. The residue was redeposited in dichloromethane / ethanol to give a precipitate G. [ (16%)

Figure pat00178
Figure pat00178

질소 분위기 하에서 화합물 G 2.0g(1.6 mmol), D 0.5g(3.4mmol), K2CO3 0.47g(3.4mmol)을 2-에톡시에탄올 7ml에 넣고 12시간 동안 환류하여 교반하였다. 반응이 종료된 후, 침전물을 걸러내고 여과액을 감압조건 하에서 농축하였다. 잔류물은 컬럼크로마토그래피를 거쳐 화합물 2 0.4g을 얻었다. (32%)2.0 g (1.6 mmol) of the compound G, 0.5 g (3.4 mmol) of D and 0.47 g (3.4 mmol) of K 2 CO 3 were added to 7 ml of 2-ethoxyethanol under nitrogen atmosphere, and the mixture was refluxed for 12 hours and stirred. After the reaction was completed, the precipitate was filtered off and the filtrate was concentrated under reduced pressure. The residue was subjected to column chromatography to obtain 0.4 g of Compound 2. (32%)

합성예 3 : 하기 화학식으로 표시되는 화합물 3의 제조Synthesis Example 3: Preparation of Compound 3 represented by the following formula

Figure pat00179
Figure pat00179

1) 리간드 전구체의 합성1) Synthesis of Ligand Precursor

Figure pat00180
Figure pat00180

벤즈이미다졸 5.0g(42mmol), 4-아이오도벤조트리플루오라이드 6.5ml(51mmol)를 요오드화구리(CuI) 0.80g(4.2mmol), 페난트롤린 1.5g(8.4mmol)의 DMF 용액(100ml)에 넣고 세슘카보네이트 28g(84mmol)을 넣어준 후 18시간 환류시킨다. 용액을 실온으로 식히고 실리카겔 패드를 이용하여 거른 후 여액을 감압하여 휘발물을 제거한다. 남은 잔류물을 컬럼크로마토그래피를 통하여 화합물 H 6.9g(78%)을 얻었다.(4.2 mmol) of copper iodide (CuI) and 1.5 g (8.4 mmol) of phenanthroline in 100 ml of DMF was added dropwise to a solution prepared by dissolving 5.0 g (42 mmol) of benzimidazole and 6.5 ml (51 mmol) of 4-iodobenzotrifluoride, , 28 g (84 mmol) of cesium carbonate was added, and the mixture was refluxed for 18 hours. The solution is cooled to room temperature, filtered using a pad of silica gel, and the filtrate is reduced in pressure to remove volatiles. The remaining residue was subjected to column chromatography to obtain 6.9 g (78%) of Compound H.

Figure pat00181
Figure pat00181

이어, 화합물 H 6.0g(29mmol)의 톨루엔(25ml) 용액에 요오드화메탄 2.0ml(32mmol)를 넣고 실온에서 다섯시간 동안 교반 후 용액을 걸러 5.8g의 침전물 I를 얻었다. 여액은 감압조건에서 휘발물을 제거하여 2.5g의 화합물 H를 얻고 여기에 다시 톨루엔 15ml과 요오드화메탄 0.82ml(13mmol)을 넣어 같은 반응을 반복, 3.1g의 I를 추가로 얻었다(88%). 얻어진 I는 에틸아세테이트로 반복하여 씻고 추가 정제과정 없이 다음 반응에 사용하였다.2.0 ml (32 mmol) of methane was added to a solution of 6.0 g (29 mmol) of compound H in 25 ml of toluene, stirred at room temperature for 5 hours, and the solution was filtered to obtain 5.8 g of precipitate I. The filtrate was evaporated under reduced pressure to obtain 2.5 g of Compound H. 15 ml of toluene and 0.82 ml (13 mmol) of iodomethane were added thereto, and the same reaction was repeated to obtain 3.1 g of I further (88%). The resulting I was washed repeatedly with ethyl acetate and used in the next reaction without further purification.

2) 이리듐 화합물의 합성2) Synthesis of iridium compound

Figure pat00182
Figure pat00182

질소 분위기 하에서 화합물 I 5.0g(24 mmol), IrCl3 ·3H2O 1.78g(6.0mmol), Ag2O 4.7g(20mmol)을 2-에톡시에탄올 50ml에 넣고 24시간 동안 환류하여 교반하였다. 반응이 종료된 후, 침전물을 걸러내고 여과액을 감압조건 하에서 농축하였다. 잔류물은 다이클로로메탄/에탄올로 재침전하여 침전물 J를 얻었다. (16%)In an atmosphere of nitrogen compounds I 5.0g (24 mmol), IrCl 3 · 3H 2 O 1.78g (6.0mmol), Ag 2 O 4.7g (20mmol) is put into a 2-ethoxy ethanol 50ml and the mixture was stirred to reflux for 24 hours. After the reaction was completed, the precipitate was filtered off and the filtrate was concentrated under reduced pressure. The residue was redeposited with dichloromethane / ethanol to give a precipitate J. (16%)

Figure pat00183
Figure pat00183

질소 분위기 하에서 화합물 J 2.0g(1.6 mmol), D 0.5g(3.4mmol), K2CO3 0.47g(3.4mmol)을 2-에톡시에탄올 7ml에 넣고 12시간 동안 환류하여 교반하였다. 반응이 종료된 후, 침전물을 걸러내고 여과액을 감압조건 하에서 농축하였다. 잔류물은 컬럼크로마토그래피를 거쳐 화합물 3 0.4g을 얻었다. (32%)
2.0 g (1.6 mmol) of the compound J, 0.5 g (3.4 mmol) of D and 0.47 g (3.4 mmol) of K 2 CO 3 were added to 7 ml of 2-ethoxyethanol under nitrogen atmosphere, and the mixture was refluxed for 12 hours and stirred. After the reaction was completed, the precipitate was filtered off and the filtrate was concentrated under reduced pressure. The residue was subjected to column chromatography to obtain 0.4 g of Compound 3. (32%)

전술한 합성예들에서 제조된 본 발명의 화합물 1 내지 3의 구조, 최대 발광 파장(λmax)을 하기 표 1에 나타내었다. 그리고, 화합물 1 내지 3의 UV 흡수 스펙트럼과 상온에서의 PL 스펙트럼을 측정하여 도 2 내지 4에 각각 나타내었다. The structure and the maximum emission wavelength (? Max) of the compounds 1 to 3 of the present invention prepared in the foregoing synthesis examples are shown in Table 1 below. The UV absorption spectra of the compounds 1 to 3 and the PL spectra at room temperature were measured and shown in Figs. 2 to 4, respectively.

Figure pat00184
Figure pat00184

RR 최대발광파장(λmax)The maximum emission wavelength (? Max) 화합물1Compound 1 HH 482482 화합물2Compound 2 FF 474474 화합물3Compound 3 CF3 CF 3 473473

상기 표 1 및 도 2 내지 도 4를 참조하면, 본 발명의 청색 인광 이리듐 화합물 1 내지 3은 473nm에서 482nm의 최대 발광 파장을 나타내는 것을 확인할 수 있었다.Referring to Table 1 and FIG. 2 to FIG. 4, it was confirmed that the blue phosphorescent iridium compounds 1 to 3 of the present invention exhibited a maximum emission wavelength of 472 nm to 482 nm.

본 발명의 청색 인광 화합물 및 이를 사용한 유기전계발광소자는 삼중항 에너지가 높은 신규 청색 인광 화합물을 제조하고, 이를 유기전계발광소자의 발광층의 도펀트로 형성함으로써, 발광층에서의 에너지 전이를 용이하게 하여 청색의 발광효율을 향상시킬 수 있는 이점이 있다.The blue phosphorescent compound of the present invention and the organic electroluminescent device using the same are prepared by preparing a novel blue phosphorescent compound having high triplet energy and forming it as a dopant of the luminescent layer of the organic electroluminescent device to facilitate energy transfer in the luminescent layer, The light emitting efficiency of the light emitting diode can be improved.

이상 첨부된 도면을 참조하여 본 발명의 실시예를 설명하였지만, 상술한 본 발명의 기술적 구성은 본 발명이 속하는 기술 분야의 당업자가 본 발명의 그 기술적 사상이나 필수적 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시 예들은 모든 면에서 예시적인 것이며 한정적인 것이 아닌 것으로서 이해되어야 한다. 아울러, 본 발명의 범위는 상기 상세한 설명보다는 후술하는 특허청구범위에 의하여 나타내어진다. 또한, 특허청구범위의 의미 및 범위 그리고 그 등가 개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be practiced. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. In addition, the scope of the present invention is indicated by the following claims rather than the detailed description. Also, all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100 : 유기전계발광소자 110 : 양극
120 : 정공주입층 130 : 정공수송층
140 : 발광층 150 : 전자수송층
160 : 전자주입층 170 : 음극
100: organic electroluminescent device 110: anode
120: Hole injection layer 130: Hole transport layer
140: light emitting layer 150: electron transporting layer
160: electron injection layer 170: cathode

Claims (7)

하기 화학식 1로 표시되는 것을 특징으로 하는 청색 인광 화합물.
[화학식 1]
Figure pat00185

상기 화학식 1에서, R1 내지 R15는 각각 독립적으로 수소, 중수소. F, Cl, Br의 할로겐, C1 내지 C20의 알킬기, C1 내지 C20의 알콕시기, C1 내지 C20의 사이클로 알킬기, C6 내지 C20의 치환 또는 비치환된 방향족 그룹, C5 내지 C20의 치환 또는 비치환된 이형고리 그룹, 시아노기, 트리플루오로메틸기, C1 내지 C20의 아민기, C6내지 C20의 방향족 그룹이 치환된 아민기, C5 내지 C20의 이형고리 그룹이 치환된 아민기 및 C1 내지 C20의 실릴기로부터 이루어진 군에서 선택된 어느 하나이다.
A blue phosphorescent compound represented by the following formula (1).
[Chemical Formula 1]
Figure pat00185

In Formula 1, R 1 to R 15 each independently represent hydrogen, deuterium, A substituted or unsubstituted aromatic group of C 6 to C 20, a substituted or unsubstituted C 5 to C 20 heteroaromatic group, a substituted or unsubstituted C 6 to C 20 alkyl group, a substituted or unsubstituted C 6 to C 20 cycloalkyl group, a substituted or unsubstituted aromatic group of C 6 to C 20, A cyclic group, a cyano group, a trifluoromethyl group, an amine group of C1 to C20, an amine group substituted with an aromatic group of C6 to C20, an amine group substituted by a aliphatic cyclic group of C5 to C20 and a silyl group of C1 to C20 Or any combination thereof.
제1 항에 있어서,
상기 청색 인광 화합물은 하기 표시되는 화합물들 중 선택된 어느 하나인 것을 특징으로 하는 청색 인광 화합물.
Figure pat00186

Figure pat00187

Figure pat00188

Figure pat00189

Figure pat00190

Figure pat00191

The method according to claim 1,
Wherein the blue phosphorescent compound is any one selected from the compounds shown below.
Figure pat00186

Figure pat00187

Figure pat00188

Figure pat00189

Figure pat00190

Figure pat00191

제2 항에 있어서,
상기 청색 인광 화합물은 하기 표시되는 화합물들 중 선택된 어느 하나인 것을 특징으로 하는 청색 인광 화합물.
Figure pat00192

Figure pat00193

Figure pat00194

Figure pat00195

Figure pat00196

Figure pat00197

Figure pat00198

Figure pat00199

Figure pat00200

Figure pat00201

Figure pat00202

Figure pat00203

Figure pat00204

Figure pat00205

Figure pat00206

Figure pat00207

Figure pat00208

Figure pat00209

Figure pat00210

Figure pat00211

Figure pat00212

Figure pat00213

Figure pat00214

Figure pat00215

Figure pat00216

Figure pat00217

Figure pat00218

Figure pat00219

Figure pat00220

Figure pat00221

Figure pat00222

Figure pat00223

Figure pat00224

Figure pat00225

Figure pat00226

Figure pat00227

Figure pat00228

Figure pat00229

Figure pat00230

Figure pat00231

Figure pat00232

Figure pat00233

Figure pat00234

Figure pat00235

Figure pat00236

Figure pat00237

Figure pat00238

Figure pat00239

Figure pat00240

Figure pat00241

Figure pat00242

Figure pat00243

Figure pat00244

Figure pat00245

Figure pat00246

Figure pat00247

Figure pat00248

Figure pat00249

Figure pat00250

Figure pat00251

Figure pat00252

Figure pat00253

Figure pat00254

Figure pat00255

Figure pat00256

Figure pat00257

Figure pat00258

Figure pat00259

Figure pat00260

Figure pat00261

Figure pat00262

Figure pat00263

Figure pat00264

Figure pat00265

Figure pat00266

Figure pat00267

Figure pat00268

3. The method of claim 2,
Wherein the blue phosphorescent compound is any one selected from the compounds shown below.
Figure pat00192

Figure pat00193

Figure pat00194

Figure pat00195

Figure pat00196

Figure pat00197

Figure pat00198

Figure pat00199

Figure pat00200

Figure pat00201

Figure pat00202

Figure pat00203

Figure pat00204

Figure pat00205

Figure pat00206

Figure pat00207

Figure pat00208

Figure pat00209

Figure pat00210

Figure pat00211

Figure pat00212

Figure pat00213

Figure pat00214

Figure pat00215

Figure pat00216

Figure pat00217

Figure pat00218

Figure pat00219

Figure pat00220

Figure pat00221

Figure pat00222

Figure pat00223

Figure pat00224

Figure pat00225

Figure pat00226

Figure pat00227

Figure pat00228

Figure pat00229

Figure pat00230

Figure pat00231

Figure pat00232

Figure pat00233

Figure pat00234

Figure pat00235

Figure pat00236

Figure pat00237

Figure pat00238

Figure pat00239

Figure pat00240

Figure pat00241

Figure pat00242

Figure pat00243

Figure pat00244

Figure pat00245

Figure pat00246

Figure pat00247

Figure pat00248

Figure pat00249

Figure pat00250

Figure pat00251

Figure pat00252

Figure pat00253

Figure pat00254

Figure pat00255

Figure pat00256

Figure pat00257

Figure pat00258

Figure pat00259

Figure pat00260

Figure pat00261

Figure pat00262

Figure pat00263

Figure pat00264

Figure pat00265

Figure pat00266

Figure pat00267

Figure pat00268

양극과 음극 사이에 형성된 유기막을 포함하는 유기전계발광소자에 있어서,
상기 유기막이 상기 제1 항 내지 제3 항 중 어느 한 항의 청색 인광 화합물을 포함하는 것을 특징으로 하는 유기전계발광소자.
An organic electroluminescent device comprising an organic film formed between an anode and a cathode,
Wherein the organic layer comprises the blue phosphorescent compound of any one of claims 1 to 3.
제4 항에 있어서,
상기 유기막이 발광층인 것을 특징으로 하는 유기전계발광소자.
5. The method of claim 4,
Wherein the organic layer is a light emitting layer.
제5 항에 있어서,
상기 청색 인광 화합물이 상기 발광층의 도펀트로 사용되는 것을 특징으로 하는 유기전계발광소자.
6. The method of claim 5,
Wherein the blue phosphorescent compound is used as a dopant of the light emitting layer.
제4 항에 있어서,
상기 양극과 상기 음극 사이에 정공주입층, 정공수송층, 전자수송층 및 전자주입층 중 선택된 어느 하나 이상을 더 포함하는 것을 특징으로 하는 유기전계발광소자.
5. The method of claim 4,
Further comprising at least one selected from the group consisting of a hole injecting layer, a hole transporting layer, an electron transporting layer and an electron injecting layer between the anode and the cathode.
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CN108409797A (en) * 2018-04-18 2018-08-17 瑞声光电科技(常州)有限公司 A kind of organometallic complex, preparation method and its application
CN108440603A (en) * 2018-04-23 2018-08-24 浙江工业大学 A kind of organometallic complex, preparation method and its application
US11201298B2 (en) 2017-01-09 2021-12-14 Universal Display Corporation Organic electroluminescent materials and devices
US11780865B2 (en) 2017-01-09 2023-10-10 Universal Display Corporation Organic electroluminescent materials and devices

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Publication number Priority date Publication date Assignee Title
US11201298B2 (en) 2017-01-09 2021-12-14 Universal Display Corporation Organic electroluminescent materials and devices
US11780865B2 (en) 2017-01-09 2023-10-10 Universal Display Corporation Organic electroluminescent materials and devices
CN108409797A (en) * 2018-04-18 2018-08-17 瑞声光电科技(常州)有限公司 A kind of organometallic complex, preparation method and its application
CN108440603A (en) * 2018-04-23 2018-08-24 浙江工业大学 A kind of organometallic complex, preparation method and its application

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