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Electron transporting-injection material and organic electroluminescent device using the same

An electron transport, organic light-emitting layer technology, applied in the field of OELD, can solve the problems of difficult to obtain high light-emitting efficiency, lower relative spectral sensitivity of images, etc.

Active Publication Date: 2010-06-23
LG DISPLAY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In particular, if figure 1 As shown, as the blue purity of the OELD increases (i.e., as the Y index on the CIE chromaticity coordinates decreases), the relative spectral sensitivity of the image from the OELD will decrease
Therefore, it is difficult to obtain OELD with high luminous efficiency

Method used

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  • Electron transporting-injection material and organic electroluminescent device using the same
  • Electron transporting-injection material and organic electroluminescent device using the same
  • Electron transporting-injection material and organic electroluminescent device using the same

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no. 1 approach -

[0023] The electron transport-injection compound of the first embodiment of the present invention contains an asymmetric anthracene structure. In more detail, one side position of anthracene is substituted with an ammonium salt substituted with a substituted or unsubstituted aromatic group, a substituted or unsubstituted heterocyclic group, or a One of substituents or unsubstituted aliphatic groups, the other side of anthracene is substituted with substituted or unsubstituted aromatic groups, substituted or unsubstituted heterocycles A group or a substituted or unsubstituted aliphatic group. As a result, the organic electroluminescence diode including the electron transport-injection compound of the first embodiment of the present invention can have high luminous efficiency, low driving voltage, and long lifetime.

[0024] The electron transport-injection compound of the first embodiment of the present invention is represented by Formula 1 below.

[0025] [Formula 1]

[002...

Embodiment 1

[0068] The indium tin oxide (ITO) layer is patterned and cleaned on the substrate, so that the light emitting area of ​​the ITO layer is 3mm*3mm. Put the substrate into the vacuum chamber and adjust the processing pressure to 1*10 -6 support. On the ITO layer, CuPC (approximately 650 angstroms) represented by the following formula 3-1 and 4,4'-bis[N-(1-naphthyl)-N-phenylamino represented by the following formula 3-2 are sequentially formed ]-biphenyl (NPD) (about 400 angstroms), a light-emitting layer (about 200 angstroms), an electron transport-injecting compound represented by A-01 in the above formula 2 (about 350 angstroms), lithium fluoride (LiF) (about 5 angstroms), and aluminum (Al) (about 1000 angstroms), whereby Manufacturing OELDs.

[0069] OELD produced 779cd / m at 0.9mA and 5.4V 2 brightness. At this time, the X index and Y index of the CIE chromaticity coordinates are 0.136 and 0.189, respectively.

Embodiment 2

[0071] The indium tin oxide (ITO) layer is patterned and cleaned on the substrate, so that the light emitting area of ​​the ITO layer is 3mm*3mm. Put the substrate into the vacuum chamber and adjust the processing pressure to 1*10 -6 support. On the ITO layer, CuPC (approximately 650 angstroms) represented by the following formula 3-1 and 4,4'-bis[N-(1-naphthyl)-N-phenylamino represented by the following formula 3-2 are sequentially formed ]-biphenyl (NPD) (about 400 angstroms), a light-emitting layer (about 200 angstroms), an electron transport-injecting compound represented by A-10 in the above formula 2 (about 350 angstroms), potassium fluoride (LiF) (about 5 angstroms), and aluminum (Al) (about 1000 angstroms), whereby Manufacturing OELDs.

[0072] OELD produced 765cd / m at 0.9mA and 5.5V 2 brightness. At this time, the X index and Y index of the CIE chromaticity coordinates are 0.132 and 0.180, respectively.

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Abstract

An electron transporting-injection compound, represented by following Formula 1: wherein each of the R1, the R2 and the R3 is selected from substituted or non-substituted aromatic group, substituted or non-substituted heterocyclic group, or of substituted or non-substituted aliphatic group, and at least one of the R2 and the R3 is selected from substituted or non-substituted heterocyclic group.

Description

[0001] This application claims the benefit of Korean Patent Application No. 10-2008-0128026 filed in Korea on Dec. 16, 2008, which is hereby incorporated by reference. technical field [0002] The present invention relates to an electron transport-injection compound and an organic electroluminescent device (OELD), and more particularly, to an electron transport-injection compound having high luminous efficiency and an OELD using the red phosphorescent compound. Background technique [0003] Recently, demand for flat panel display devices having a larger display area and a smaller footprint has been increasing. In flat panel display devices, OELD has many advantages compared with inorganic electroluminescent devices, liquid crystal display devices and plasma display panels. OELD devices have characteristics such as excellent viewing angle and contrast. In addition, since the OELD device does not require a backlight assembly, the OELD device is light in weight and low in powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D213/74C07D215/38C07D217/22C09K11/06H01L51/50H01L51/54
CPCC07F7/0814H01L51/0067H01L51/0061H01L51/006C07D215/38H01L51/0058C07D217/22C07D213/74H10K85/636H10K85/626H10K85/633H10K85/654C09K11/06
Inventor 郑贤哲柳东熙朴钟贤朴泰翰李敬勋
Owner LG DISPLAY CO LTD
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