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Phenanthroimidazole electroluminescent material with circular polarization luminescence as well as preparation method and application thereof

An electroluminescent material and phenanthroimidazole technology, which is applied in the directions of luminescent materials, chemical instruments and methods, circuits, etc., can solve the problems such as the scarcity of material types and the performance to be improved, and achieve commercial application and improve device electrical properties. The effect of electroluminescence performance and high utilization rate

Active Publication Date: 2021-07-16
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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  • Phenanthroimidazole electroluminescent material with circular polarization luminescence as well as preparation method and application thereof
  • Phenanthroimidazole electroluminescent material with circular polarization luminescence as well as preparation method and application thereof
  • Phenanthroimidazole electroluminescent material with circular polarization luminescence as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0086] (5) Preparation of Compound CPPI1

[0087] In argon atmosphere, 2-fluorobenzene [b] naphthalene [2, 1-E: 1 ', 2'-g] [1,4] dioxus (1.89 g, 5 mmol) and 1- ( 4-tert-butylphenyl) -2- (4- (4, 4,4,5,5-tetramethyl-1,3,2-dioxane-2-yl) phenyl) -1H-Philippine [9, 10-D] Imidazole (4.26 g, 7.5 mmol), catalyst tetraphenylphosphine palladium (PD (PPH) 3 ) 4(0.29 g, 0.25 mmol) is dissolved in toluene, and then the potassium carbonate solution (50%, 3.45 g / 3.45 mL deionized water, 25 mmol), 100 ° C reaction for 16 h, stopped the reaction, and quenched with water The reaction was carried out with dichloromethane and dried with anhydrous magnesium sulfate. The solution was concentrated, and the soil yellow liquid was purified, purified, petroleum ether and dichloromethane mixed solvent (volume ratio 3: 1) as a collapse For the eluge, a white solid was obtained, and the yield was 72%. 1 H NMR, 13 C NMR, MS and element analysis results show that the resulting compound is a target product, an...

Embodiment example 18

[0108] Preparation of organic electroluminescent devices

[0109] 1) Cleaning of ITO conductive glass. Place the ITO glass substrate on the washing frame, using ultrasonic ultrasonic cleaning, the sequential sequence of washing liquid is acetone, isopropanol, detergent, deionized water, and isopropyl alcohol, the purpose is to sufficiently remove the ITO glass base Substatic stains such as photoresist, such as photoresist, etc., and improve interface contact. Then dry in a vacuum oven;

[0110] 2) Place ITO in an ion etch analyzer, use oxygen plasma (O 2 Plasma) For twenty-minute bombardment, completely remove the possible residual organic substances of the ITO glass substrate;

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

[0112] 4) In the glove box of the nitrogen atmosphere, a layer of 80 nm thick with a layer of 80 nm thick, a layer of 80 nm thick, and a device based on the lig...

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Abstract

The invention discloses a phenanthroimidazole electroluminescent material with circular polarization luminescence as well as a preparation method and application thereof. The structure of the phenanthroimidazole electroluminescent material with circular polarization luminescence is as shown in formula (I), and the material (1) has circular polarization luminescence performance, can be used as a luminescent layer to prepare a CP-OLED device, and can improve the contrast ratio of the device and reduce energy consumption; (2) the material has local hybrid charge transfer state performance, triplet state excitons can be effectively utilized through anti-gap crossing to improve the utilization rate of the excitons, and the electroluminescent performance of the device is improved; (3) the luminescent material CPPI is large in conjugation degree and high in rigidity, the thermal stability of the material can be improved, the radiative transition rate of the material can be increased, and the luminous efficiency of the material can be improved; and (4) the luminescent material CPPI has relatively large molecular weight and good solubility, can be used for preparing large-area flexible display devices by adopting a solution processing technology, and has huge development potential and prospect in the field of organic electronic display.

Description

Technical field [0001] The present invention belongs to the field of organic photoelectric technology, and in particular, the present invention relates to a type of phenanthemum electroluminescent material having circularly polarized luminescent light and its preparation method and application thereof. Background technique [0002] Organic Light-Emitting DioDes, OLEDS has a unique advantage that is a unique advantage that is widely visible, rich in color, thin volume, autologous glow and bend, can be curled, and can be more potential, known as the most potential third On behalf of the display technology, electronic products such as smartphones, TV, Tablet, VR (virtual reality, headset) and wearable smart devices have huge application prospects. [0003] The circularly polarized luminescent (CPL) is a phenomenon that the lighter luminescent substance is protected from the left-handed or right-rotated circularly polarized light. Light-emitting materials having circularly polarized ...

Claims

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Application Information

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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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