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Organic electroluminescent material, preparation method thereof and organic electroluminescent device containing organic electroluminescent material

An electroluminescent material and luminescent technology, applied in luminescent materials, electric solid devices, organic chemistry, etc., can solve the problems of efficiency drop, triplet-polaron annihilation, triplet annihilation, etc., to reduce the driving voltage , good carrier mobility, and the effect of improving luminous efficiency and lifetime

Pending Publication Date: 2022-07-08
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lifetime of the excited state of phosphorescent materials is long, and triplet-triplet annihilation and triplet-polaron annihilation are easy to form when the triplet exciton concentration is high, which seriously reduces the efficiency.

Method used

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  • Organic electroluminescent material, preparation method thereof and organic electroluminescent device containing organic electroluminescent material
  • Organic electroluminescent material, preparation method thereof and organic electroluminescent device containing organic electroluminescent material
  • Organic electroluminescent material, preparation method thereof and organic electroluminescent device containing organic electroluminescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Preparation formula Chinese formula I-1, its concrete synthesis step is as follows:

[0052]

[0053]Under nitrogen protection system, weigh formula I-1a (153.85mmol, 50g), formula I-1b (169.23mmol, 52.83g), sodium tert-butoxide (430.77mmol, 41.4g) into the reaction system, add 500ml Toluene, catalyst Pd under nitrogen protection 2 (dba) 3 (6.15mmol, 3.54g) and (50%) P(t-Bu) 3 (6.15mmol, 1.25g), refluxed at 110°C for 22h under nitrogen protection, then cooled to 25°C, the organic phase was passed through a 200g silica gel funnel, the organic phase filtrate was spun until no liquid flowed out, 100ml of dichloromethane was added to dissolve, and the Solution column chromatography (200~300 mesh, 1000g) developing agent DCM:PE=1:1, spin the receiving liquid until no liquid flows out, add petroleum ether and stir for 20min, suction filter, rinse the filter cake with petroleum ether, filter The cake was vacuum-dried to obtain the compound formula I-1c (82.4 g, yield 84....

Embodiment 2

[0059] Preparation formula Chinese formula I-4, its concrete synthesis step is as follows:

[0060]

[0061] Under nitrogen protection system, weigh formula I-1a (94.87mmol, 50g), formula I-4b (104.35mmol, 43.02g), sodium tert-butoxide (265.63mmol, 25.53g) into the reaction system, add 500ml Toluene, catalyst Pd under nitrogen protection 2 (dba) 3 (3.79 mmol, 2.18 g) and (50%) P(t-Bu) 3 (3.79mmol, 0.767g), refluxed at 100°C for 19h under nitrogen protection, then cooled to 25°C, the organic phase was passed through a silica gel funnel of 200g silica gel, the organic phase filtrate was rotated until no liquid flowed out, 100ml of dichloromethane was added to dissolve, and the Solution column chromatography (200~300 mesh, 1000g) developing agent DCM:PE=2:1, spin the receiving liquid until no liquid flows out, add petroleum ether and stir for 20min, suction filter, the filter cake is rinsed with petroleum ether, the filter The cake was dried in vacuum to obtain the compound...

Embodiment 3

[0067] Preparation formula Chinese formula I-6, its concrete synthesis step is as follows:

[0068]

[0069] Under nitrogen protection system, weigh formula I-1a (94.87mmol, 50g), formula I-6b (104.35mmol, 44.7g), sodium tert-butoxide (265.63mmol, 25.53g) into the reaction system, add 50ml Toluene, catalyst Pd under nitrogen protection 2 (dba) 3 (3.79 mmol, 2.18 g) and (50%) P(t-Bu) 3 (3.79mmol, 0.767g), refluxed at 110°C for 22h under nitrogen protection, then cooled to 25°C, the organic phase was passed through a silica gel funnel of 200g silica gel, the organic phase filtrate was rotated until no liquid flowed out, 100ml of dichloromethane was added to dissolve, and the Solution column chromatography (200~300 mesh, 1000g) developing agent DCM:PE=2:1, spin the receiving liquid until no liquid flows out, add petroleum ether and stir for 20min, suction filter, the filter cake is rinsed with petroleum ether, the filter The cake was vacuum-dried to obtain the compound form...

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Abstract

The invention discloses an organic electroluminescent material, a preparation method thereof and an organic electroluminescent device containing the organic electroluminescent material, and belongs to the technical field of organic photoelectric materials, and the structural general formula of the organic electroluminescent material is shown in the specification. After the obtained organic compound is applied to the organic electroluminescent device, the starting voltage of the device is effectively reduced, the luminous efficiency of the device is improved, the service life of the device is prolonged, the preparation method of the organic luminescent material is simple in process, and the prepared product is high in purity.

Description

technical field [0001] The present invention relates to the technical field of organic optoelectronic materials, in particular to an organic electroluminescent material, a preparation method thereof, and an organic electroluminescent device comprising the same. Background technique [0002] As a new type of display technology-OLED device, it has wide viewing angle, self-luminescence, high efficiency, low energy consumption, thinness, rich colors, fast response speed, wide application temperature range, low driving voltage, flexible, bendable and transparent The unique advantages of display panels and environmental friendliness are mainly used in flat panel displays and new-generation lighting, and can also be used as backlights for LCDs. [0003] Since high-efficiency organic light-emitting diodes were first reported, the industry has been working on how to improve device efficiency and stability. Phosphorescent materials have strong spin-orbit coupling and can utilize sing...

Claims

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Application Information

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IPC IPC(8): C07D403/10C07D403/14C09K11/06H01L51/50H01L51/54
CPCC07D403/10C07D403/14C09K11/06C07B2200/09C09K2211/1007C09K2211/1011C09K2211/1029C09K2211/1059H10K85/626H10K85/615H10K85/6572H10K50/11Y02E10/549
Inventor 王辉陈剑锋尹维龙张慧
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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