Method for preparing hydroxylquinoline aluminium of blue green type mixing ligand

Abstract

This invention relates to a method for preparing 8-hydroxyquinoline aluminum with blue-green mixed ligands. The method utilizes aluminum sulfate crystals, 8-hydroxyquinoline crystals and acetyl acetone as the raw materials, ethanol as the solvent, hexahydropyridine as the acidity regulator, and deionized water and ethanol as the washing reagents. The method comprises: preparing ethanol solution of aluminum sulfate crystals, ethanol solution of acetyl acetone and hexahydropyridine, and ethanol solution of 8-hydroxyquinoline crystals and hexahydropyridine, synthesizing, vacuum-filtering, washing, filtering, vacuum-drying, and vacuum-subliming to obtain light green ligands. The introduction of acetyl acetone as a ligand can improve the luminescent performance and intensity, as well as the luminescent brightness by 80%. The method has such advantages as simple process, few equipments, low cost, abundant raw materials, high product purity (99.6%) and high yield (61.4%).

Description

technical field [0001] The invention relates to a preparation method of 8-hydroxyquinoline aluminum alloy with blue-green mixed ligands, and belongs to the technical field of preparation methods and applications of aluminum-based organic electroluminescent materials. Background technique [0002] Organic electroluminescence can realize full-color display from blue light region to red light region, low driving voltage, high luminous brightness and luminous efficiency, wide vision, fast response speed, relatively simple manufacturing process, and can realize flexible display and many other advantages. Its material selection range is wide and there are many varieties. [0003] Organic electroluminescent materials have high-efficiency fluorescence, good conductivity, semiconductor characteristics, good film-forming properties, strong stability of the material itself, and good mechanical processing performance. [0004] In recent years, organic electroluminescent diodes (OLEDs) ...

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Problems solved by technology

[0006] At present, organic electroluminescent devices have low efficiency, poor stability, fast performance decay, and short service life, mainly due to the preparation of luminescent materials. Most of the existing luminescent materials have low purity and unstable luminescent performance, especially blue light and blue-green The preparation of optical materials is relatively backward, the purity is low, the yield is low, the process flow is unreasonable, and it is difficult to meet the needs of organic light-emitting diodes

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