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Blue fluorescence doped material with good thermal stability and high efficiency and organic electroluminescent device

A technology with thermal stability and blue fluorescence, which is applied in luminescent materials, electric solid-state devices, organic chemistry, etc., can solve the problems of light-emitting devices, poor matching of electron orbital energy levels and energy levels, and reduce the working stability of materials, etc., to achieve Improve luminous efficiency, good conjugation effect, improve thermal stability and luminous efficiency

Active Publication Date: 2021-03-05
NANJING TOPTO MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the wide energy gap of the blue light material, the matching between the energy level of its electron orbit and the energy level of the carrier injection / transport material is poor, and the high energy level of the excited state will also reduce the working stability of the material, making the development of high-performance It is very difficult to luminescent device with blue light material

Method used

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  • Blue fluorescence doped material with good thermal stability and high efficiency and organic electroluminescent device
  • Blue fluorescence doped material with good thermal stability and high efficiency and organic electroluminescent device
  • Blue fluorescence doped material with good thermal stability and high efficiency and organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]

[0038] The synthetic method of blue fluorescent dopant material (1) is as follows:

[0039] (1)

[0040]

[0041] Under nitrogen protection, compound 1-a (5.0g, 438.95g / mol, 11.39mmol), compound 1-b (1eq, 2.32g, 203.94g / mol, 11.39mmol), sodium tert-butoxide (1.1eq, 1.2 g, 96.1g / mol, 12.53mmol), tris(dibenzylideneacetone)dipalladium (0.05eq, 0.52g, 915g / mol, 0.57mmol), tri-tert-butylphosphine (0.05eq, 0.12g, 202.32g / mol, 0.57mol), toluene (50ml) were added in the reaction flask, after the addition was completed, the temperature was raised to reflux for 5 hours, after the reaction was completed, it was cooled to room temperature, and then 50ml of water was added and stirred for 15 minutes to obtain the filtrate, which was filtered through diatomaceous earth The organic phase was obtained by liquid separation, and the organic phase was dried with anhydrous magnesium sulfate and then spin-dried, and purified by column chromatography to obtain compound 1-c (4.72g, ...

Embodiment 2

[0049]

[0050] The synthetic method of blue fluorescent dopant material (6) is as follows:

[0051] Step (1) is identical with embodiment 1

[0052] (2)

[0053]

[0054] Under nitrogen protection, compound 2-a (2g, 514.98g / mol, 3.88mmol), compound 2-b (1eq, 0.87g, 225.15g / mol, 3.88mmol), sodium tert-butoxide (1.1eq, 0.41g , 96.1g / mol, 4.27mmol), tris(dibenzylideneacetone) dipalladium (0.05eq, 0.178g, 915g / mol, 0.19mmol), tri-tert-butylphosphine (0.05eq, 0.039g, 202.32g / mol, 0.19mol), toluene (20ml) was added to the reaction flask, after the addition was completed, the temperature was raised to reflux for 5 hours, after the reaction was completed, the room temperature was lowered to room temperature, and 20ml of water was added to stir for 15 minutes, and then filtered to obtain the filtrate, which was filtered through diatomaceous earth. The organic phase was obtained from the liquid, and the organic phase was dried with anhydrous magnesium sulfate and then spin-dri...

Embodiment 3

[0058]

[0059] The synthetic method of blue fluorescent dopant material (11) is as follows:

[0060] Step (1) is identical with embodiment 1

[0061] (2)

[0062]

[0063] Under nitrogen protection, compound 3-a (2g, 514.98g / mol, 3.88mmol), compound 3-b (1eq, 1.54g, 397.18g / mol, 3.88mmol), sodium tert-butoxide (1.1eq, 0.41g , 96.1g / mol, 4.27mmol), tris(dibenzylideneacetone) dipalladium (0.05eq, 0.178g, 915g / mol, 0.19mmol), tri-tert-butylphosphine (0.05eq, 0.039g, 202.32g / mol, 0.19mol), toluene (20ml) was added to the reaction flask, after the addition was completed, the temperature was raised to reflux for 5 hours, after the reaction was completed, the room temperature was lowered to room temperature, and 20ml of water was added to stir for 15 minutes, and then filtered to obtain the filtrate, which was filtered through diatomaceous earth. The organic phase was obtained from the liquid, and the organic phase was dried with anhydrous magnesium sulfate and then spin-dr...

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Abstract

The invention discloses a blue fluorescence doped material with good thermal stability and high efficiency and an organic light-emitting device. The structural formula of the blue fluorescence doped material is shown in the specifications. When the blue fluorescence doped material is applied to the organic light-emitting device, the light-emitting efficiency is improved to a certain extent under the same current density, and the starting voltage of the device is reduced to a certain extent; the power consumption of the device is relatively reduced, and the service life of the device is correspondingly prolonged.

Description

technical field [0001] The technical field of organic electroluminescence of the present invention specifically relates to a blue fluorescent doped material with good thermal stability and high efficiency and an organic electroluminescence device. Background technique [0002] As the next-generation flat-panel display technology, organic light-emitting diodes (OLEDs) have the advantages of active light emission, low driving voltage, fast response speed, wide viewing angle, light and thin devices, and flexible display. wide attention from the world and industry. To realize the full-color display of OLEDs, red, green, and blue primary color light-emitting materials are essential. Among them, the blue light material is particularly important, it can not only provide the necessary blue emission light, but also obtain green light and red light through energy transfer. Moreover, blue light materials are also the key to effectively reducing the energy consumption of full-color OL...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C09K11/06H01L51/50H01L51/54
CPCC07F5/02C09K11/06C09K2211/1011C09K2211/1029C09K2211/1044C09K2211/1055H10K85/624H10K85/615H10K85/654H10K85/6576H10K85/657H10K85/6572H10K50/12Y02E10/549
Inventor 钱超许军
Owner NANJING TOPTO MATERIALS CO LTD
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