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Organic electroluminescent material and application thereof

An organic, selected technology, applied in the fields of light-emitting materials, organic chemistry, circuits, etc., can solve the problems of lack of host materials, high driving voltage, unfavorable carrier injection and transport balance, etc., to achieve high mobility and reduce work. Effects of voltage and high carrier transport

Inactive Publication Date: 2019-05-21
BEIJING ETERNAL MATERIAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high-efficiency red light-emitting devices are rare, mainly due to the lack of suitable host materials.
[0004] At present, the host material widely used in red phosphorescent devices is CBP, but it requires a higher driving voltage, Tg=62°C, and is easy to crystallize
In addition, CBP is a p-type material, and the hole mobility is much higher than the electron mobility, which is not conducive to the balance of carrier injection and transport.
[0005] However, there is still much room for improvement in the luminescence performance of existing organic electroluminescent materials, and the industry urgently needs to develop new organic electroluminescent materials

Method used

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  • Organic electroluminescent material and application thereof
  • Organic electroluminescent material and application thereof
  • Organic electroluminescent material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0060] Synthesis Example 1 is a preparation example of an intermediate of the present invention, and the intermediate is a structure shown in formula M1:

[0061]

[0062] Utilize the M1 intermediate, select appropriate synthetic raw materials as required, and carry out the reaction by known methods to obtain compounds of the present invention with different structures. Other compounds can be obtained by suzuki coupling reaction between M1 and different raw materials.

[0063] Synthesis Example 1: Synthesis of Intermediate M1

[0064]

[0065] In a 250mL three-neck flask, add compound A (1.0g, 3.9mmol), compound B (1.2g, 4.8mmol), Pd 2 (dba) 3 (0.04g, 0.039mmol), sodium tert-butoxide (0.75g.7.8mmol), tri-tert-butylphosphine tetrafluoroborate (0.02g, 0.078mmol) and 30ml of xylene, pump and fill nitrogen 3 times, in nitrogen Under protection, the temperature was raised to reflux temperature. After reacting overnight, the temperature was lowered to room temperature, dilu...

Synthetic example 2

[0066] Synthesis example 2: Synthesis of the shown compound P1

[0067]

[0068] Add compound M1 (1.0g, 2.2mmol), compound C (0.90g, 2.64mmol), potassium carbonate (0.91g, 6.6mmol) and 30ml DMF into a 250mL three-necked flask, pump and charge nitrogen 3 times, and raise the temperature under nitrogen protection After reacting overnight at 130°C, cool down to room temperature, pour the reaction solution into water to precipitate precipitates, filter the precipitates, dissolve the filter cake in toluene, pass through a silica gel column, and then recrystallize with toluene to obtain 1.3 g of a bright yellow solid. rate 80%. MS (m / e): 763, 1 H NMR (300MHz, CDCl 3 ): 9.30(2H), 9.15(2H), 8.56(2H), 8.53(2H), 8.43(2H), 8.16(1H), 8.11(2H), 8.02(2H), 7.95(2H), 7.80(3H ), 7.70(6H), 7.34(2H), 7.26(3H), 7.16(2H), elemental analysis: C(86.5%), N(9.2%), H(4.3%).

Synthetic example 3

[0069] Synthesis example 3: Synthesis of the shown compound P19

[0070]

[0071] The preparation method was the same as that of P1, except that compound C was replaced by compound D to obtain 1.4 g of a bright yellow solid product with a yield of 81%. MS (m / s): 762, 1 H NMR (300MHz, CDCl 3 ): 8.56(2H), 8.43(2H), 8.24(1H), 8.13(3H), 7.95(4H), 7.82(7H), 7.68(4H), 7.52(4H), 7.42(2H), 7.34(2H ), 7.26(2H), 7.24(1H), elemental analysis: C (88.2%), N (7.3%), H (4.5%).

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Abstract

The invention relates to a general formula compound shown as a formula (I) in description, wherein Ar1 is selected from C4-C40 substituted or unsubstituted heterocyclic aromatic hydrocarbons groups, and C8-C30 substituted or unsubstituted thick heterocyclic aromatic hydrocarbon groups; L1 is selected from single bonds, C6-C30 substituted or unsubstituted aromatic hydrocarbon groups or C6-C30 substituted or unsubstituted condensed ring aromatic hydrocarbon groups; substituent groups on the Ar1 and the L1 are independently selected from C1-C30alkyl or naphthenic base, alkenyl and C1-C6 alkoxy orthioalkoxy, or are independently selected from single ring or condensed ring aryls containing 4 to 60 ring carbon atoms, single ring or condensed ring aryl containing heteroatoms selected from N, O,S and Si and having 4 to 60 ring carbon atoms. The invention also relates to an organic electroluminescence device using the general formula compound, and the device has high current efficiency and low driving voltage.

Description

technical field [0001] The invention relates to an organic compound, which can be used as a host material for a light-emitting layer of an organic electroluminescent device; the invention also relates to the application of the compound in an organic electroluminescent device. Background technique [0002] At present, with the continuous advancement of OLED technology in the two major fields of lighting and display, people are paying more attention to the research on its core materials. An organic electroluminescent device with high efficiency and long life is usually the result of an optimized combination of device structure and various organic materials. As a result, this provides great opportunities and challenges for chemists to design and develop functionalized materials with various structures. Common functional organic materials include: hole injection materials, hole transport materials, hole blocking materials, electron injection materials, electron transport materia...

Claims

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Application Information

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IPC IPC(8): C07D487/04C09K11/06H01L51/50H01L51/54
Inventor 高文正张春雨杜倩任雪艳
Owner BEIJING ETERNAL MATERIAL TECH
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