A kind of electroluminescent material and its preparation method and light-emitting device made of the material

An electroluminescent material and solution technology, applied in luminescent materials, electro-solid devices, electrical components, etc., can solve the problems of unsatisfactory luminous brightness decay life, high production cost, harsh synthesis conditions, etc., and is conducive to industrialization promotion. , the effect of low production cost

Inactive Publication Date: 2015-09-23
GUOKE RE ADVANCED MATERIALS CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the five crystalline phases, the preparation of the α phase is relatively complicated, and generally requires vacuum sublimation to obtain it, and the cost of the product is very high; while the γ-AlQ 3 , δ-AlQ 3 , ε-AlQ 3 It belongs to the "high temperature phase", and generally requires a high temperature above 350 °C to obtain (γ-AlQ 3 Need 410℃, δ-AlQ 3 Need 380℃, ε-AlQ 3 Need 350 ℃), some also need to pressurize, the synthesis conditions are relatively harsh, and the production cost is high; while the traditional method with low production cost can only prepare β-phase 8-hydroxyquinoline aluminum, its luminous brightness and decay life not ideal

Method used

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  • A kind of electroluminescent material and its preparation method and light-emitting device made of the material
  • A kind of electroluminescent material and its preparation method and light-emitting device made of the material
  • A kind of electroluminescent material and its preparation method and light-emitting device made of the material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Dissolve 10g of aluminum trichloride in 60ml of deionized water to obtain an aluminum trichloride solution, dissolve 40g of 8-hydroxyquinoline in 100ml of ethanol to obtain an ethanolic solution of 8-hydroxyquinoline, mix these two solutions, It was concentrated to about 50 ml at 70°C, and then the temperature was maintained at 70°C, and a saturated solution of sodium chloride was slowly added dropwise with stirring. The yellow-green 8-hydroxyquinoline aluminum was gradually precipitated, and when the reaction was completed, the precipitate was filtered. The crude product was washed three times with deionized water and five times with methanol, and then vacuum-dried at 70° C. to obtain the final product. The XRD pattern of the product is as follows figure 1 shown.

Embodiment 2

[0036]Dissolve 20g of aluminum isopropoxide in 100ml of ethanol to obtain an aluminum isopropoxide solution, and dissolve 52g of 8-hydroxyquinoline in 100ml of acetone to obtain an acetone solution of 8-hydroxyquinoline. °C was concentrated to about 50 ml, then the temperature was maintained at 70 °C, and a saturated sodium sulfate solution was slowly added dropwise with stirring. The yellow-green 8-hydroxyquinoline aluminum was gradually precipitated, and when the reaction was completed, the precipitate was filtered. The crude product was washed 5 times with deionized water and 7 times with tetrahydrofuran, and then vacuum-dried at 70° C. to obtain the final product.

Embodiment 3

[0038] Dissolve 30g of aluminum sulfate octadecahydrate in 60ml of deionized water to obtain a solution of aluminum sulfate octadecahydrate, and dissolve 49g of 8-hydroxyquinoline in 100ml of methanol to obtain a methanol solution of 8-hydroxyquinoline. After mixing these two solutions, It was concentrated to about 50 ml at 60°C, and then the temperature was maintained at 60°C, and a saturated sodium sulfate solution was slowly added dropwise with stirring. The yellow-green 8-hydroxyquinoline aluminum was gradually precipitated, and when the reaction was completed, the precipitate was filtered. The crude product was washed 7 times with deionized water and 3 times with tetrahydrofuran, and then vacuum-dried at 70° C. to obtain the final product.

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Abstract

The invention provides an electroluminescent material, a preparation method for the same, and a luminescent device prepared from the electroluminescent material. The electroluminescent material is zeta-phase 8-hydroxyquinoline electroluminescent material, and at least has diffraction peaks at the places where Bragg 2theta is 18.8+ / -0.1 degrees, 22.2+ / -0.1 degrees, 24.5+ / -0.1 degrees and 25.6+ / -0.1 degrees under the excitation of Cu K-alpha characteristic X-ray having a wavelength of 1.541 angstroms. In the preparation method provided by the invention, zeta-phase 8-hydroxyquinoline is prepared by adopting a salting-out method. The OLED (organic light emitting diode) device prepared from the zeta-phase 8-hydroxyquinoline provided by the invention has the advantages of being high in luminescent brightness and long in attenuation life.

Description

technical field [0001] The invention relates to an electroluminescent material, a preparation method thereof, and a light-emitting device made of the material, and belongs to the technical field of organic / complex optoelectronic materials and devices. Background technique [0002] With the advent of the information age, new, high-efficiency, and lightweight organic light-emitting diodes (OLEDs) have attracted more and more attention. The basic structure of OLED is a light-emitting device constructed by sandwiching an organic light-emitting material between two electrodes. Due to its advantages of low driving voltage, easy realization of large-screen display, high brightness, wide viewing angle, and continuously adjustable light-emitting color, etc. It has become a major research hotspot in the field of information display. As the third generation display technology following cathode ray tube (CRT) and liquid crystal display (LCD), it has been rapidly developed in recent yea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/06C09K11/06H01L51/54
Inventor 温晓帆胡斌庄卫东何华强刘荣辉胡运生
Owner GUOKE RE ADVANCED MATERIALS CO LTD
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