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A blue fluorescent doped material and organic electroluminescent device with good thermal stability and high efficiency

A technology of blue fluorescent and doped materials, which is applied in the field of blue fluorescent doped materials and organic electroluminescent devices, which can solve the problems of reducing the working stability of materials, poor matching of electron orbital energy levels, and difficulties in light-emitting devices. , to achieve the effects of improving thermal stability and luminous efficiency, good conjugation effect, and improving luminous efficiency

Active Publication Date: 2022-07-12
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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  • A blue fluorescent doped material and organic electroluminescent device with good thermal stability and high efficiency
  • A blue fluorescent doped material and organic electroluminescent device with good thermal stability and high efficiency
  • A blue fluorescent doped material and organic electroluminescent device with good thermal stability and high efficiency

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]

[0038] The synthesis method of the blue fluorescent doping material (1) is as follows:

(1)

[0039]

[0040] 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) and toluene (50ml) were added to the reaction flask, the temperature was raised to reflux for 5h after the addition of materials, and after the reaction was completed, the temperature was lowered to room temperature, 50ml of water was added and stirred for 15min to obtain a filtrate. The filtrate was filtered through diatomaceous earth. The organic phase was obtained by liquid separation. The organic phase was dried with anhydrous magnesium sulfate and then spin-dried. After purification by column chromatography, compound 1-c (4.72 g, yie...

Embodiment 2

[0046]

[0047] The synthesis method of the blue fluorescent doping material (6) is as follows:

[0048] Step (1) is the same as Example 1

(2)

[0049]

[0050] 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) were combined , 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) and toluene (20ml) were added to the reaction flask, the temperature was raised to reflux for 5h after the addition of materials, and after the reaction was completed, the temperature was lowered to room temperature, and 20ml of water was added to stir for 15min to obtain a filtrate. The organic phase was obtained from the liquid. The organic phase was dried over anhydrous magnesium sulfate and then spin-dried. After purification by column chromatography, compound 2-c (1.94 g, yield ...

Embodiment 3

[0054]

[0055] The synthesis method of the blue fluorescent doping material (11) is as follows:

[0056] Step (1) is the same as Example 1

(2)

[0057]

[0058] 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) and toluene (20ml) were added to the reaction flask, the temperature was raised to reflux for 5h after the addition of materials, and after the reaction was completed, the temperature was lowered to room temperature, and 20ml of water was added to stir for 15min to obtain a filtrate. The organic phase was obtained from the liquid. The organic phase was dried with anhydrous magnesium sulfate and then spin-dried. After purification by column chromatography, compound 3-c (2.3 g, yield 71.2%) was obt...

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Abstract

The invention discloses a blue fluorescent doped material and an organic electroluminescence device with good thermal stability and high efficiency, and the structural formula is as follows: Under the same current density, the luminous efficiency has been improved to a certain extent, and the startup voltage of the device has decreased, and the power consumption of the device is relatively reduced, so that the life of the device is correspondingly increased.

Description

technical field [0001] The present invention relates to the technical field of organic electroluminescence, in particular 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 of 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, thin and light devices, and flexible display. Widespread attention from the world and industry. To achieve full-color display of OLEDs, red, green, and blue light-emitting materials are essential. Among them, blue light materials are particularly important, which can not only provide the necessary blue emission light, but also obtain green and red light through energy transfer. Moreover, blue light materials are also the key to effectively reducing the energy consumption of full-color OLEDs. Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(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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