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Organic light emitting device

A technology of organic light-emitting devices and organic layers, which is applied in the manufacture of semiconductor devices, electric solid-state devices, and semiconductor/solid-state devices, etc., can solve the problems of inability to display good effects, difficulty in using blue fluorescent light-emitting devices, and large differences in light-emitting systems.

Pending Publication Date: 2022-05-17
BEIJING ETERNAL MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, Chinese patent CN110317139A records that the effects of these compounds on red and green phosphorescent light-emitting devices are very different from the light-emitting systems of blue light-emitting devices. The inventors of the present invention have found that they cannot be displayed in commonly used fluorescent light-emitting devices Good effect, so difficult to use in blue fluorescent light-emitting devices

Method used

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Examples

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Embodiment

[0162] In order to facilitate understanding of the present invention, the present invention enumerates the following examples. It should be clear to those skilled in the art that the embodiments are only for helping to understand the present invention, and should not be regarded as specific limitations on the present invention.

[0163] Synthetic example

Synthetic example 1

[0165] The preparation method of compound A102

[0166]

[0167] Synthesis of Intermediate A102-M1

[0168] The compound 2-bromo-4-phenylaniline (50.0g, 202mmol) synthesized in the previous step, dibenzofuran-4-boronic acid (47.1g, 222mol), and potassium carbonate (36.2g, 262mmol) were placed in a 1000mL three-port In the bottle, stir well, then replace the air on the bottle with nitrogen three times, add tetrakistriphenylphosphine palladium (4.66g, 4.03mmol) into the reaction solution under the protection of nitrogen, then raise the temperature to 100°C, and react for 18h. After cooling down, the reaction solution was poured into a saturated aqueous ammonium chloride solution, extracted with ethyl acetate (500 mL, three times), the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated to obtain a brown-red oil. The crude product was purified by silica gel chromatography (petroleum ether / ethyl acetate, 10 / 1) to obtain a yellow solid....

Synthetic example 2

[0176] The preparation method of compound A148

[0177]

[0178] Take compound A102-M2 (15g, 30.8mmol), 2-(4-bromophenyl)-9,9 dimethylfluorene (11.8g, 33.8mmol) and sodium tert-butoxide (3.55g, 36.9mmol) into Put it into a 500mL three-necked flask filled with 200mL of toluene, stir well to dissolve. The air in the bottle was then fully replaced with nitrogen, followed by the catalyst tris(dibenzylideneacetone)dipalladium (282 mg, 0.308 mmol) and 2-bicyclohexylphosphine-2',6'-dimethoxybiphenyl (505 mg , 1.23mmol) was added to the reaction solution, and the temperature was raised to reflux for 18h. After cooling down, the reaction solution was poured into saturated ammonium chloride aqueous solution, extracted with ethyl acetate (200 mL, three times), the organic phases were combined, dried over anhydrous sodium sulfate, filtered, and concentrated to obtain a brown-black oil. The crude product was purified by a silica gel layer column (petroleum ether / dichloromethane, 15 / 1)...

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Abstract

The invention relates to an organic light-emitting device which comprises a first electrode, a second electrode and an organic layer located between the first electrode and the second electrode, and the organic layer comprises an electron blocking layer and a light-emitting layer; the electron blocking layer comprises a compound with a structure shown in a general formula (A), the light-emitting layer comprises a compound shown in a general formula (3) as a guest material, and the performance and the stability of the device can be improved by using specific matching of the electron blocking layer material with the structure shown in the general formula (A) and the guest material shown in the general formula (3) in the light-emitting device.

Description

technical field [0001] The invention relates to an organic light-emitting device, in particular to an organic light-emitting device with low driving voltage and high luminous efficiency. Background technique [0002] Organic electroluminescent devices (OLEDs) made of organic electroluminescent materials can be used in fields such as solid-state light-emitting full-color displays and solid-state white lighting. Generally, an organic light emitting device contains a light emitting layer and a pair of opposing electrodes sandwiching the layer. When the device applies an electric field between the two electrodes, electrons are injected from the cathode side and holes are injected from the anode side. The electrons recombine with the holes in the light-emitting layer to form an excited state. When the excited state returns to the ground state, energy is emitted in the form of light. With the continuous advancement of OLED technology in the two major fields of lighting and displa...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K85/624H10K85/655H10K85/656H10K85/654H10K50/18H10K71/00
Inventor 王志鹏张艳高文正曾礼昌
Owner BEIJING ETERNAL MATERIAL TECH
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