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A benzopyran-based luminescent auxiliary material and its preparation method and organic electroluminescent device

A technology of benzopyrans and auxiliary materials, which is applied in the fields of light-emitting materials, electro-solid devices, organic chemistry, etc., can solve the problems of reducing quantum efficiency, destroying the balance of hole-electron charge, etc., so as to improve the luminous efficiency and not easy to aggregate. , the effect of high hole mobility

Active Publication Date: 2022-05-27
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, since the organic material used in the hole transport region has very high hole mobility, the hole-electron charge balance may be disrupted and the quantum efficiency (cd / A) may decrease

Method used

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  • A benzopyran-based luminescent auxiliary material and its preparation method and organic electroluminescent device
  • A benzopyran-based luminescent auxiliary material and its preparation method and organic electroluminescent device
  • A benzopyran-based luminescent auxiliary material and its preparation method and organic electroluminescent device

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Experimental program
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Effect test

Embodiment 1

[0075] This compound embodiment provides a light-emitting auxiliary material, the chemical structural formula of which is formula 003 in the content of the invention, and the reaction route of the preparation method of the light-emitting auxiliary material is as follows:

[0076]

[0077] Its specific preparation method comprises the following steps:

[0078] 1. Under nitrogen protection, dissolve reactant A-003 (30.00 mmol) in 150.00 mL of THF, cool down to 0°C, add reactant B-003 (90.00 mmol), stir and react for 5 h, add water and dichloride The mixture was extracted with methane. The extracted organic layer was then dried using sodium sulfate, and the solvent was removed using a rotary evaporator to obtain solid organics. Use a small amount of dichloromethane to completely dissolve the solid organic matter, then slowly add it dropwise to the petroleum ether solution, stir evenly, there is precipitation, suction filtration to obtain the solid, rinse with absolute ethanol...

Embodiment 2

[0088] This compound embodiment provides a light-emitting auxiliary material, whose chemical structural formula is formula 035 in the content of the invention, and the reaction route of the preparation method of the light-emitting auxiliary material is as follows:

[0089]

[0090] Its specific preparation method comprises the following steps:

[0091] 1. Under the protection of nitrogen, the reactant A-035 (30.00 mmol) was dissolved in 150.00 mL of THF, cooled to 0 °C, and the reactant B-035 (90.00 mmol) was added. After stirring for 5 h, water was added and dichloromethane was added. The mixture was extracted with methane. The extracted organic layer was then dried using sodium sulfate, and the solvent was removed using a rotary evaporator to obtain solid organics. Use a small amount of dichloromethane to completely dissolve the solid organic matter, then slowly add it dropwise to the petroleum ether solution, stir evenly, there is precipitation, suction filtration to ob...

Embodiment 3

[0101] The compound embodiment provides a luminescent auxiliary material, the chemical structural formula of which is formula 058 in the content of the invention, and the reaction route of the preparation method of the luminescent auxiliary material is as follows:

[0102]

[0103] Its specific preparation method comprises the following steps:

[0104] 1. Under the protection of nitrogen, the reactant A-058 (30.00 mmol) was dissolved in 150.00 mL of THF, cooled to 0 °C, and the reactant B-058 (90.00 mmol) was added. After stirring for 5 hours, add water and dichloride The mixture was extracted with methane. The extracted organic layer was then dried using sodium sulfate, and the solvent was removed using a rotary evaporator to obtain solid organics. Use a small amount of dichloromethane to completely dissolve the solid organic matter, then slowly add it dropwise to the petroleum ether solution, stir evenly, there is precipitation, suction filtration to obtain a solid, rins...

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Abstract

The invention discloses a benzopyran-based luminescent auxiliary material, a preparation method thereof and an organic electroluminescent device, which belong to the technical field of chemistry and luminescent materials. The general structural formula of the luminescent auxiliary material is: in the formula, m and n are respectively are independently natural numbers not greater than 4, and m and n are not 0 at the same time; L 1 , L 2 are each independently at least one of a linking bond, a substituted or unsubstituted C6-C30 arylene group, and a substituted or unsubstituted 3- to 30-membered heteroarylene group. In the benzopyran-based luminescent auxiliary material provided by the embodiment of the present invention, the amine unit on the complex has a lower ionization potential, better electron donating property, and higher hole mobility; at the same time, the symmetry of the molecule is reduced. sex, increasing the conformational isomers of the molecule. After the luminescence auxiliary material is used in an organic electroluminescent device, the luminous efficiency of the device is improved, the lifespan is delayed, and the driving voltage is reduced.

Description

technical field [0001] The invention relates to the technical field of chemistry and light-emitting materials, in particular to a benzopyran-based light-emitting auxiliary material, a preparation method thereof, and an organic electroluminescent device. Background technique [0002] As a new generation of display technology, Organic Light Emitting Diode (OLED) has incomparable advantages over LCD flat panel displays. The advantage is that it provides wider viewing angles, higher contrast ratios, and faster response times. An organic electrical element utilizing an organic light-emitting phenomenon generally has an anode, a cathode, and a structure including an organic layer between them. In order to improve the efficiency and stability of organic electrical components, the organic layer is usually composed of a multi-layer structure composed of various materials, such as a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D491/052C09K11/06H01L51/54H01L51/50
CPCC07D491/052C09K11/06C09K2211/1088C09K2211/1007C09K2211/1014C09K2211/1092H10K85/631H10K85/636H10K85/633H10K85/654H10K85/6574H10K85/6576H10K50/11
Inventor 马晓宇黄悦汪康张雪孙向南金成寿贾宇
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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