A kind of phenanthroimidazole electroluminescent material with circularly polarized luminescence and its preparation method and application

An electroluminescent material, phenanthroimidazole technology, applied in the direction of luminescent materials, chemical instruments and methods, circuits, etc., can solve the problems of material types or quantities, and performance needs to be improved, so as to achieve commercial application and improve device electrical Luminescent properties, easy synthesis of effects

Active Publication Date: 2022-05-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many studies on phenanthroimidazole luminescent materials. However, the research on luminescent materials with circularly polarized luminescence and localized hybrid charge transfer state properties is still in its infancy. Both the type and quantity of materials are extremely rare. also needs to be improved

Method used

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  • A kind of phenanthroimidazole electroluminescent material with circularly polarized luminescence and its preparation method and application
  • A kind of phenanthroimidazole electroluminescent material with circularly polarized luminescence and its preparation method and application
  • A kind of phenanthroimidazole electroluminescent material with circularly polarized luminescence and its preparation method and application

Examples

Experimental program
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preparation example Construction

[0086] (5) Preparation of compound CPPI1

[0087] Under argon atmosphere, 2-fluorobenzo[b]dinaphtho[2,1-e:1',2'-g][1,4]dioxan (1.89 g, 5 mmol) and 1-( 4-tert-butylphenyl)-2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-1H-phenanthrene [9,10-d]imidazole (4.26g, 7.5mmol), catalyst tetraphenylphosphine palladium (Pd(PPh 3 ) 4) (0.29g, 0.25mmol) was dissolved in toluene, then an alkaline potassium carbonate aqueous solution (50% by mass, 3.45g / 3.45mL deionized water, 25mmol) was added, reacted at 100°C for 16h, after the reaction was stopped, quenched with water Reaction, extraction with dichloromethane and drying with anhydrous magnesium sulfate, the solution was concentrated to obtain a khaki liquid, purified by silica gel column chromatography, petroleum ether and dichloromethane mixed solvent (volume ratio 3:1) as eluent As eluent, a white solid was obtained with a yield of 72%. 1 H NMR, 13 C NMR, MS and elemental analysis results show that the compound obtained...

Embodiment example 18

[0108] Fabrication of Organic Electroluminescent Devices

[0109] 1) Cleaning of ITO conductive glass. Place the ITO glass substrate on the film rack, and use an ultrasonic machine to ultrasonically clean it. The washing liquid is used in the order of acetone, isopropanol, detergent, deionized water and isopropanol. The purpose is to fully remove the ITO glass substrate. Stains that may remain on the surface of the chip, such as photoresist, etc., and improve interface contact. Then dry in a vacuum oven;

[0110] 2) ITO is placed in an oxygen plasma etcher, using oxygen plasma (O 2 Plasma) carries out the bombardment of 20 minutes, thoroughly removes possible residual organic matter on the surface of the ITO glass substrate;

[0111] 3) Spin-coat a 40nm-thick hole injection layer PEDOT:PSS (Baytron P4083) on the ITO, and then dry it in a vacuum oven at 80°C for 12 hours;

[0112] 4) Spin-coat a layer of 80nm-thick phenanthroimidazole electroluminescent material with circu...

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Abstract

The invention discloses a class of phenanthroimidazole electroluminescence material with circularly polarized light emission, a preparation method and application thereof. The structure of the described phenanthroimidazole electroluminescent material with circularly polarized luminescence is shown in formula (I), and the material: (1) has circularly polarized luminescent properties, and prepares a CP-OLED device as a light-emitting layer, which can improve the efficiency of the device. (2) It has localized hybrid charge transfer state performance, which can effectively use triplet excitons to improve the utilization rate of excitons and improve the electroluminescence performance of devices; ( 3) The luminescent material CPPI has a large degree of conjugation and strong rigidity, which can improve the thermal stability of the material, increase the radiation transition rate of the material, and improve its luminous efficiency; (4) The luminescent material CPPI has a large molecular weight and has a good Solubility, solution processing technology can be used to prepare large-area flexible display devices, which has great development potential and prospects in the field of organic electronic display.

Description

technical field [0001] The invention belongs to the technical field of organic optoelectronics, and in particular relates to a class of phenanthroimidazole electroluminescence materials with circularly polarized luminescence, and a preparation method and application thereof. Background technique [0002] Organic light-emitting diodes (Organic Light-Emitting Diodes, OLEDs) have unique advantages such as quick response, wide viewing angle, rich colors, light and thin volume, self-luminescence and bendable, rollable and even foldable, and are known as the most potential third Modern display technology has great application prospects in electronic products such as smart phones, TVs, tablet computers, VR (virtual reality, head-mounted display devices) and wearable smart devices. [0003] Circularly polarized luminescence (CPL) refers to the phenomenon that a chiral luminescent substance is stimulated to emit left-handed or right-handed circularly polarized light. Luminescent mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D405/10C07D405/14C07D409/14C07D413/14C07F7/10C09K11/06H01L51/50H01L51/54
CPCC07D405/10C07D405/14C07D413/14C07D409/14C07F7/0812C09K11/06C09K2211/1007C09K2211/1011C09K2211/1014C09K2211/1029C09K2211/1044C09K2211/1088C09K2211/1092C09K2211/1033H10K85/624H10K85/615H10K85/631H10K85/636H10K85/6576H10K85/657H10K85/6574H10K85/40H10K85/6572H10K50/12H10K50/11
Inventor 马於光胡德华应磊郭婷
Owner SOUTH CHINA UNIV OF TECH
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