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Organic electroluminescent element

A technology of organic light-emitting devices and organic material layers, applied in electrical components, luminescent materials, organic chemistry, etc., can solve the problems of low overall light efficiency of organic light-emitting devices, improve luminous efficiency and color purity, enhance life characteristics, low The effect of drive voltage

Active Publication Date: 2017-12-01
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Meanwhile, the external luminous efficiency (hereinafter also referred to as "light coupling efficiency") means the efficiency of light generated in the organic layer and extracted outside the organic light emitting device, and even when high light conversion efficiency is obtained in the organic layer (That is, even when the internal luminous efficiency is high), when the external luminous efficiency is low, the overall light efficiency of the organic light-emitting device is still low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example A

[0225] Synthesis of the following chemical formula A

[0226] [chemical formula A]

[0227]

[0228] In the 2-(4-bromophenyl)-benzo Azole (5g, 18.2mmol), bis(pinacol)diboron (5.1g, 20.1mmol) and potassium acetate (5.4g, 54.7mmol) were introduced into 1,4-dioxane (182ml, 0.1M) and after suspending and stirring the resultant, Pd(dppf)Cl was added thereto 2 (260 mg, 0.36 mmol), and the resultant was heated and stirred at 100° C. for 8 hours. After cooling the reaction solution to room temperature, H was added thereto 2 O (100ml), the resultant was stirred for 10 minutes, then extracted with THF. Remove the aqueous layer and wash with magnesium sulfate (MgSO 4 ) to treat the organic layer, then concentrate. The resultant was crystallized with ethanol (150ml), and then filtered to obtain the compound of chemical formula A (5.3g, yield 90%).

[0229] MS: [M+H] + =322

preparation example B

[0230] Synthesis of the following chemical formula B

[0231] [chemical formula B]

[0232]

[0233] The compound of formula B was synthesized in the same manner as the compound of formula A except that 2-(4-bromophenyl)-benzothiazole was used instead of 2-(4-bromophenyl)-benzo azole.

[0234] MS: [M+H] + =338

preparation example 1

[0235] Synthesis of Chemical Formula 1-4

[0236]

[0237] After the compound of chemical formula A (10g, 31.1mmol) and 1-bromo-3,5-diphenylbenzene (9.6g, 31.1mmol) were dissolved in THF (310ml), dissolved in H 2 K in O (100ml) 2 CO 3 (8.6 g, 62.3 mmol) was suspended and stirred, then tetrakis(triphenylphosphine)palladium(0) (720 mg, 0.62 mmol) was added thereto, and the resultant was refluxed for 8 hours. After the reaction was completed, the temperature was lowered to room temperature, the aqueous layer was removed, and the solution was washed with magnesium sulfate (MgSO 4 ) to treat the organic layer, then filter. The solution was concentrated in vacuo under reduced pressure, and subjected to column purification at a ratio of THF / hexane=1 / 3 to obtain the compound of Chemical Formula 1-4 (10 g, yield: 76%).

[0238] MS: [M+H] + =424

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Abstract

The present specification provides an organic electroluminescent element comprising a capping layer on one surface of an electrode.

Description

technical field [0001] This specification claims priority and benefit from Korean Patent Application No. 10-2015-0127783 filed with the Korean Intellectual Property Office on September 9, 2015, the entire contents of which are incorporated herein by reference. [0002] This specification relates to organic light emitting devices. Background technique [0003] The organic light emitting phenomenon generally refers to a phenomenon in which electrical energy is converted into light energy using an organic material. An organic light emitting device utilizing the organic light emitting phenomenon generally has a structure including an anode, a cathode, and an organic material layer therebetween. Herein, the organic material layer is usually formed into a multilayer structure formed of different materials to improve the efficiency and stability of the organic light-emitting device, for example, the organic material layer can be composed of a hole injection layer, a hole transport...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56C09K11/06
CPCC09K11/06H10K85/656H10K85/615H10K50/858C09K2211/1029C09K2211/1044C09K2211/1092C09K2211/185C07D263/57C07D277/66C07D413/10C07D413/14C07D417/10C09K11/025C09K2211/1007H10K85/631H10K50/11H01L2924/12044H10K85/649H10K85/657H10K50/00H10K50/80H10K85/624H10K85/626H10K85/633H10K85/636H10K85/654H10K85/6572H10K99/00H10K50/121H10K85/622H10K2101/10C09K2211/1011C09K2211/1014
Inventor 李大雄赵然镐全相映金炯锡徐尚德
Owner LG CHEM LTD
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