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Organic electroluminescent device

An electroluminescent device, an organic technology, applied in the direction of electroluminescent light sources, electric solid-state devices, electric light sources, etc., can solve the problems of inability to use in large quantities, poor stability, etc.

Active Publication Date: 2016-10-19
GUANGDONG AGLAIA OPTOELECTRONICS MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the host materials of red and green fluorescent dye-doped devices, there are also a series of commercial materials, among which 8-hydroxyquinoline aluminum (Alq 3 ) type compounds, devices prepared with such compounds have high efficiency, but often these materials are relatively poor in stability, so that they cannot be used in large quantities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074]

[0075] Synthesis of intermediate 1c

[0076] In the reaction flask, add 1a (240.00g, 0.88mol), 1b (496.32g, 1.76mol), Pd (PPh 3 ) 4 (20.35g, 17.60mmol), potassium carbonate (302.52g, 2.20mol), toluene (2400mL), pure water (1200mL). After pumping nitrogen for three times, turn on the heating, wait until the temperature of the reaction solution reaches 95-105°C, keep the temperature for 8-12 hours, take samples for TLC and HPLC, and the reaction of the raw materials is complete. Stop heating, lower the temperature to 20-30°C, filter with suction, separate the organic layer from the filtrate, extract the water layer with ethyl acetate, combine the organic layers, wash with water, dry over anhydrous magnesium sulfate, filter with suction, and concentrate the filtrate to obtain dark yellow Solid crude product. Petroleum ether was recrystallized to obtain an off-white solid product with a yield of 90% and a purity of 95%.

[0077] Synthesis of intermediate 1d

[007...

Embodiment 2

[0089] Synthesis of Compound 3

[0090]

[0091] 1g (9.5g, 16.92mmol), 3a (7.25g, 30.46mmol), Pd (PPh 3 ) 4 (1.5g, 1.3mmol), potassium carbonate (5.84g, 42.3mmol), toluene (150mL), pure water (75mL). The reaction was carried out at 105°C after pumping nitrogen three times. The stop reaction time was detected by the liquid phase, about 12h or so. At the beginning of the reaction, the reaction solution was the khaki color of the catalyst, and then gradually turned into a yellow solution. After the reaction was stopped, the upper layer was clear and light yellow, and the lower layer was water. After stopping the reaction, filter, wash the filter residue with ethyl acetate until there is no product in the filter residue, collect the filtrate, spin dry, a large amount of off-white solid precipitates, collect the filter residue and dry it to obtain the target product with a purity of 98%. The off-white solid powder with a purity of 99.7% was obtained by vacuum sublimation.

...

Embodiment 3

[0094] Synthesis of Compound 89

[0095]

[0096] 1g (10.0g, 17.8mmol), 89a (7.1g, 19.6mmol), Pd (PPh 3 ) 4 (432.2mg, 0.35mmol), K 2 CO 3 (6.14g, 44.5mmol), toluene (300mL) and water (150mL), deoxygenate the device, pass nitrogen protection, and then heat to 100°C to react overnight. Use the ratio of DCM:PE=1:5 to spot the plate, and the product spots will emit strong blue light under the ultraviolet lamp with a wavelength of 365nm, and the Rf value is about 0.2. The reaction solution was filtered with silica gel, then the filter cake was washed twice with ethyl acetate (100mL), separated, the aqueous layer was extracted once with ethyl acetate (100mL), the organic layers were combined, and the organic layer was washed once with water (200mL). Mutually. Spin dry to remove solvent. The crude product was recrystallized with 120ml of DCM / MeOH, and suction filtered to obtain 13.1g of yellow solid powder with a purity of 98.7% and a yield of 92.2%. Vacuum sublimation gave...

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Abstract

The invention relates to an organic electroluminescent device which comprises an anode, a cathode and an organic layer. The organic layer is one or a plurality of layers selected from hole injection layer, hole transmission layer, electron injection layer, electron transmission layer and light emitting layer and at least comprises the light emitting layer. The light emitting layer has a host-guest doped system which is composed of a host material and a guest material. The thickness of the light emitting area of the light emitting layer is 490-750nm. The host material comprises a compound of which the structure is represented by a formula (I). The organic electroluminescent device emits red light or green light and furthermore has advantages of high light emitting efficiency, excellent color purity, and long service life.

Description

technical field [0001] The invention relates to an organic electroluminescence red light and green light device prepared by a novel organic host material, and belongs to the technical field of organic electroluminescence device display. Background technique [0002] As a new type of display technology, organic electroluminescent devices have self-illumination, wide viewing angles, low energy consumption, high efficiency, thinness, rich colors, fast response speed, wide applicable temperature range, low driving voltage, flexible, bendable and Due to the unique advantages of transparent display panels and environmental friendliness, organic electroluminescent device technology can be applied to flat panel displays and new-generation lighting, and can also be used as a backlight source for LCDs. [0003] An organic electroluminescent device is a device prepared by spin coating or depositing a layer of organic materials between two metal electrodes. A classic three-layer organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/00H01L51/54C07C13/567C07C13/72C07C1/32C07D213/06C07D213/127H10K99/00
CPCC07C1/321C07C13/567C07C13/72C07D213/06C07D213/127H10K85/623H10K85/626H10K85/615H10K85/654C09K11/06C07D455/04C07D491/147C07C2603/18C07C2603/24C07C2603/94H05B33/14H05B33/20H10K50/11C09K2211/1011H10K50/12H10K50/14H10K50/17C07C13/573H10K50/171H10K85/653H10K85/6572H10K50/15H10K50/16H10K85/633
Inventor 鲁锦鸿李哲陈金鑫蔡丽菲
Owner GUANGDONG AGLAIA OPTOELECTRONICS MATERIALS
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