Preparation method of organic electro luminous material rare earth europium organic metal complex

A technology of electroluminescent materials and organic metals, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high color purity, low purity, high cost, etc., and achieve the effect of simple process, good purity and less equipment

Inactive Publication Date: 2006-01-11
TAIYUAN UNIV OF TECH +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The light-emitting materials used in organic electroluminescent devices mainly include metal complexes, organic small molecule dyes and organic polymers. Rare earth organometallic complexes belonging to the category of organometallic complexes have large emission peaks with narrow half-peak widths in the emission spectrum. , only 10 nanometers, high color purity, this unique advantage is unmatched by other luminescent materials, and the quantum efficiency can reach almost 100%, it is a promising organic electroluminescence material, at present, the red The research on rare earth organometallic complexes of rare earth europium, green, and blue primary colors and its devices is in its infancy, and there are still many deficiencies in the purification, synthesis, and detection of rare earth europium organometallic complexes, and further experimental research is needed, such as : The production process is unreasonable, the cost is high, the purity is low, the quality is poor, the extraction yield is low, and high-purity rare earth europium organometallic complexes cannot be obtained in large quantities

Method used

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  • Preparation method of organic electro luminous material rare earth europium organic metal complex
  • Preparation method of organic electro luminous material rare earth europium organic metal complex
  • Preparation method of organic electro luminous material rare earth europium organic metal complex

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Embodiment approach

[0084] The present invention will be further described below in conjunction with accompanying drawing:

[0085] figure 1 Shown is the process flow chart for preparing rare earth europium organometallic complexes, which must be carried out in strict accordance with the process flow and process values, and operate in sequence.

[0086] The chemical substances required for the preparation must be strictly selected, and the purity control must be carried out to avoid the intervention of too many impurities and prevent side reactions, so as not to affect the luminescence performance of the product.

[0087] The chemical substances used in the compound reaction must be accurately weighed with an electronic scale in strict accordance with the ratio to ensure that the compound reaction is accurately compounded according to the molar ratio, optimize the reaction parameters, and avoid waste.

[0088] When preparing europium chloride, europium oxide and excess concentrated hydrochloric ...

Embodiment 1

[0104] All production equipment is in ready working condition;

[0105] Preparation of europium chloride: Weigh 0.5 g of europium oxide and place it in a round-bottomed crucible, add 15 ml of concentrated hydrochloric acid, place the round-bottomed crucible on an electric heating mantle and heat at a temperature of 80°C±5°C for 120 minutes, stirring evenly , the solution was clarified, and the concentrated hydrochloric acid was evaporated to obtain a white europium chloride powder;

[0106] Dissolve Europium Chloride:

[0107] Put the white europium chloride powder in a beaker, add 20 ml of absolute ethanol, heat with an electric heating mantle for ten minutes, and stir at 50°C±5°C to form a europium chloride ethanol solution;

[0108] To dissolve dibenzoylmethane:

[0109] Weigh 1.884 g of diphenylmethane, put it in a beaker, add 80 ml of absolute ethanol, heat the beaker on an electric heating mantle at a temperature of 50°C±5°C, and stir for 10 minutes while heating until...

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Abstract

An Eu-organic metal match used as organic electroluminescent material is prepared through preparing europium chloride from europium oxide, respectively dissolving europium chloride, dibenzoyl methane and 1, 10-O-phenanthroline in alcohol, mixing at 70+/-5 deg.C, adding alkali twice for regulating pH value, reaction, washing three times, filtering, baking, recrystallizing three times and vacuum filter.

Description

Technical field: [0001] The invention relates to an organic electroluminescent material, a preparation method of an organic metal complex with rare earth europium ions as central ions, and belongs to the technical field of research and preparation of organic electroluminescent materials and devices. Background technique [0002] Organic electroluminescent devices have the advantages of low-voltage DC drive, high brightness, large viewing angle, easy colorization, and flat panel large-area display. Compared with inorganic electroluminescent devices, organic electroluminescent devices are easy to process and have good mechanical properties. Compared with liquid crystal display devices, organic electroluminescent devices have a faster response speed. It is expected that in the near future, organic electroluminescent devices will replace inorganic electroluminescent and liquid crystal display devices and become the main body of flat panel displays in the future. [0003] The stu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
Inventor 许并社阮莉敏王华郝玉英周禾丰刘旭光卢英兰
Owner TAIYUAN UNIV OF TECH
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