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Electroluminescent material, preparation method for same, and luminescent device prepared from electroluminescent material

A technology for electroluminescent materials and light-emitting devices, applied in the directions of light-emitting materials, electro-solid devices, electrical components, etc., can solve the problems of high production cost, unsatisfactory light-emitting brightness decay life, complicated preparation, etc. Conducive to the effect of industrialization promotion

Inactive Publication Date: 2013-07-03
GUOKE RE ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • 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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  • Electroluminescent material, preparation method for same, and luminescent device prepared from electroluminescent material
  • Electroluminescent material, preparation method for same, and luminescent device prepared from electroluminescent material
  • Electroluminescent material, preparation method for same, and luminescent device prepared from electroluminescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 10g aluminum trichloride is dissolved in 60ml deionized water to obtain aluminum trichloride solution, 40g 8-hydroxyquinoline is dissolved in 100ml ethanol to obtain the ethanol solution of 8-hydroxyquinoline, after these two kinds of solutions are mixed, in Concentrate to about 50ml at 70°C, then keep the temperature at 70°C, and slowly drop into saturated sodium chloride solution under stirring condition. Yellow-green 8-hydroxyquinoline aluminum gradually precipitated, and the precipitate was filtered after the reaction was complete. The crude product was washed 3 times with deionized water and 5 times with methanol, and then dried in vacuum at 70° C. to obtain the final product. The XRD pattern of this product is as follows figure 1 shown.

Embodiment 2

[0036]20g aluminum isopropoxide is dissolved in 100ml ethanol to obtain aluminum isopropoxide solution, 52g 8-hydroxyquinoline is dissolved in 100ml acetone to obtain the acetone solution of 8-hydroxyquinoline, after these two kinds of solutions are mixed, at 70 °C to about 50ml, then maintain the temperature at 70 °C, and slowly add a saturated solution of sodium sulfate dropwise under stirring conditions. Yellow-green 8-hydroxyquinoline aluminum gradually precipitated, and the precipitate was filtered after the reaction was complete. The crude product was washed 5 times with deionized water and 7 times with tetrahydrofuran, and then dried in vacuum at 70° C. to obtain the final product.

Embodiment 3

[0038] Dissolve 30g aluminum sulfate octadecahydrate in 60ml deionized water to obtain aluminum sulfate octadecahydrate solution, dissolve 49g 8-hydroxyquinoline in 100ml methanol to obtain a methanol solution of 8-hydroxyquinoline, after mixing these two solutions, Concentrate to about 50ml at 60°C, then keep the temperature at 60°C, and slowly drop into saturated sodium sulfate solution under stirring condition. Yellow-green 8-hydroxyquinoline aluminum gradually precipitated, and the precipitate was filtered after the reaction was complete. The crude product was washed 7 times with deionized water and 3 times with tetrahydrofuran, and then dried in vacuum 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 electroluminescence material, a preparation method thereof and a light-emitting device made of the material, belonging to the technical field of organic / complex photoelectric materials and devices. Background technique [0002] With the advent of the information age, novel, high-efficiency, and lightweight organic light-emitting diodes (OLEDs) have attracted widespread attention. The basic structure of OLED is a light-emitting device constructed by sandwiching organic light-emitting materials between two electrodes. Due to its advantages such as low driving voltage, easy realization of large-screen display, high brightness, wide viewing angle, and continuously adjustable luminous color, it makes OLED It has become a major research hotspot in the field of information display. As the third-generation display technology after cathode ray tube (CRT) and liquid crystal display (LCD), it has developed rapidly in recent years and ...

Claims

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Application Information

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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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