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Compound and application thereof, and organic electroluminescent device containing compound

A compound and independent technology, applied in the field of organic electroluminescent devices, can solve the problems of large energy level difference between singlet state and triplet state, deep unoccupied orbital energy level, slow crossing between inverse systems, etc., to reduce quenching , the effect of reducing the non-radiative transition and reducing the efficiency roll-off

Pending Publication Date: 2021-06-04
BEIJING ETERNAL MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large energy level difference between the singlet state and the triplet state, the reverse intersystem crossing is slow, and the lowest unoccupied orbital energy level is deep, and the excitons are easy to recombine directly on the dye, resulting in serious efficiency roll-off. shorter lifespan

Method used

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  • Compound and application thereof, and organic electroluminescent device containing compound
  • Compound and application thereof, and organic electroluminescent device containing compound
  • Compound and application thereof, and organic electroluminescent device containing compound

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0103] Synthesis of Compound M1:

[0104]

[0105] (1) Preparation of Compound M1-1:

[0106] At room temperature, 1,3-dibromo-5 (isopropyl-2-D) benzene (27.7 g, 100 mmol), diphenylamine (41.7 g, 250 mmol), tris (di苄yl-Base acetone) dual palladium PD 2 (DBA) 3 (0.92 g, 1 mmol), 2-dicyclohexylphosphine-2,6-dimethoxybiphenyl (S-PhOS) (0.82 g, 2 mmol), tert-butoxide (24 g, 250 mmol), xylene ( 500ml) Add to 1L single-mouth bottle, nitrogen replacement three times, heating to 130 ° C to react overnight. The reaction liquid decreased to room temperature, extracted with ethyl acetate, washed with a large amount of water, and concentrated in the organic phase to concentrate (PE: DCM = 25: 1) to obtain 38 g of crude material, and n-hexane hexane was boiled and washed. 36.4 g of white solid, yield 79.9%. Molecular ion mass determined by mass spectrometry: 455.28 (Theoretical value: 455.25).

[0107] (2) Preparation of Compound M1

[0108] M1-1 (4.6 g, 10 mmol) was added to 250 ml of three...

preparation example 2

[0110] The difference from Preparation Example 1 is only to replace dipheniline to the same molar amount of two (4- (meth-D3)) aniline to obtain product M3. Molecular Ion Quality Determined by Mass Spectrometry: 531.35 (Theoretical Value: 531.37).

preparation example 3

[0112] Product M11.

[0113] The difference from the preparation example 1 is only to replace dipheniline to the equomolar amount of dijeiine to give the product M11. Molecular ion mass of mass spectrometry: 767.35 (Theoretical value: 767.36).

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Abstract

The invention provides a compound and application thereof, and an organic electroluminescent device comprising the same, the compound has a structure of formula (I), and the compound is used as a material of a luminescent layer in the organic electroluminescent device; and the organic electroluminescent device comprises a first electrode, a second electrode and an organic layer between the first electrode and the second electrode, and the organic layer contains any one or a combination of at least two of the compounds. The compound provided by the invention can further reduce the efficiency roll-off of the device and prolong the service life of the device on the premise of ensuring proper driving voltage.

Description

Technical field [0001] The present invention relates to the field of organic electroluminescent techniques, and more particularly to a compound and its application thereof, including an organic electroluminescent device thereof. Background technique [0002] Based on the display and illumination organic electroluminescent diode (OLEDS) has self-emitting, wide viewing angle, quick response time, low power consumption, large size, and flexibility, etc. have aroused extensive attention. The device structure of the OLEDS is often composed of a plurality of functional layers such as transport layers, barrier layers, light-emitting layers, in which the emission degree of the device is directly determined by the luminescent dye. [0003] Although the luminous efficiency of the fluorescent material is low, the power consumption is higher than the phosphorescent material, but due to the long life, the color purity is better. Currently, Blu-ray devices are still mainly based on fluorescent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C09K11/06H01L51/54
CPCC07F5/027C09K11/06C09K2211/1055C09K2211/1007C09K2211/1029C09K2211/1014C09K2211/1011C09K2211/1044H10K85/615H10K85/631H10K85/636H10K85/654H10K85/657H10K85/6572
Inventor 魏金贝李国孟曾礼昌李熠烺
Owner BEIJING ETERNAL MATERIAL TECH
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