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Organic Electroluminescent Device

An electroluminescent device, organic technology, applied in the direction of electric solid devices, electrical components, luminescent materials, etc., can solve the problem of undisclosed organic electroluminescent devices, etc., and achieve the effects of improved lifespan, improved power efficiency, and low driving voltage

Inactive Publication Date: 2015-08-12
ROHM & HAAS ELECTRONICS MATERIALS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these patents do not disclose an organic electroluminescent device comprising a combination of a specific host compound and a specific dopant compound in the light-emitting layer, and a nitrogen-containing aromatic heterocycle between the light-emitting layer and the cathode. derivative

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Embodiment 1: the preparation of compound H-33

[0087]

[0088] Preparation of compound 1-1

[0089] After adding 2-bromonaphthalene (819 g, 3.96 mol) to tetrahydrofuran (THF) (5 L), the mixture was stirred at room temperature for 10 minutes to completely dissolve 2-bromonaphthalene, followed by cooling to -72°C. To this mixture was slowly added n-butyllithium (1.6M in n-hexane) (2.68 L, 4.285 mol) dropwise. After 1 hour, 2-chloroanthraquinone (400 g, 1.648 mol) was added to the mixture, and then the mixture was stirred for 26 hours while slowly warming to room temperature. After addition of saturated ammonium chloride solution, the mixture was stirred for 1 hour and then filtered under reduced pressure. The separated organic layer was evaporated to obtain compound 1-1 (brown solid, 551 g, 67%).

[0090] Preparation of compound 1-2

[0091] Compound 1-1 (551g, 1.104mol), potassium iodide (733g, 4.42mol), sodium dihydrogenphosphate monohydrate (NaH 2 PO 2 ...

Embodiment 2

[0096] Embodiment 2: the preparation of compound D-7

[0097]

[0098] Preparation of compound 2-1

[0099] After dissolving 2-bromofluorene (74 g, 270.7 mmol) in anhydrous tetrahydrofuran solvent (500 mL), 2.5 M n-butyllithium (2.5 M in hexane) was slowly added dropwise to the mixture at -78 °C ( 130.0 mL, 324.9 mmol). After stirring for 1 hour, 2,6-dibromoanthracene-9,10-dione (30.0 g, 108.3 mmol) was added to the mixture. The mixture was stirred while warming slowly to room temperature. After 17 hours, water was added to the mixture. The mixture was stirred for 30 minutes, extracted with ethyl acetate (EA) (500 mL), and washed with water (500 mL). Magnesium sulfate was added to the obtained organic layer to remove water. The obtained substance was distilled under reduced pressure and dried to obtain compound 2-1 (150.8 g, 200 mmol).

[0100] Preparation of compound 2-2

[0101] After dissolving compound 2-1 (11 g, 14.51 mmol), potassium iodate (KI) (9.64 g, ...

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Abstract

The invention relates to an organic electroluminescent device; in the device, a luminescent layer comprises a substrate compound and a doped compound; a nitrogen-containing aromatic heterocyclic derivative is set between the luminescent layer and a cathode. The organic electroluminescent device has a low driving pressure, and is improved in luminous efficiency, power efficiency and service life.

Description

technical field [0001] The present invention relates to an organic electroluminescent device in which a host compound and a dopant compound are contained in a light-emitting layer, and a nitrogen-containing aromatic heterocyclic derivative is contained between the light-emitting layer and a cathode. Background technique [0002] An electroluminescence (EL) device is a self-luminous device, which has the advantage of providing a wider viewing angle, higher contrast ratio and faster response time. Eastman Kodak first developed an organic EL device [Appl. Phys. Lett. 51, 913, 1987] by using aromatic diamine small molecules and aluminum complexes as materials for forming a light-emitting layer. [0003] The organic EL device converts electrical energy into light when electricity is applied to the organic light emitting material. Generally, the organic EL device has a structure including an anode, a cathode, and an organic layer disposed between the anode and the cathode. The o...

Claims

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Application Information

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IPC IPC(8): H01L51/54C09K11/06
CPCC09K11/06
Inventor 李暻周赵英俊金南均慎孝壬金承爱
Owner ROHM & HAAS ELECTRONICS MATERIALS LLC
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