Preparation method of dysprosium coordinated compound emitting pale yellow light

Abstract

The invention relates to a preparation method of a dysprosium coordinated compound emitting pale yellow light, which comprises the following steps of: first preparing a dysprosium chloride and ethanol solution, a sulfosalicylic acid, triphenylphosphine oxide and ethanol solution, and a sodium hydroxide and ethanol solution by taking dysprosium chloride, sulfosalicylic acid and triphenylphosphine oxide as raw materials and taking ethanol as a solvent; in an orlovius flask, conducting synthesis in the states of heating, oscillation agitation, water circulation condensation, argon protection, water bath, neutral pH value and no water; and synthesizing dysprosium coordinated compound white powder by washing, vacuum filtering, recrystallization purification, hot vacuum filtering and vacuum drying. The synthesis method has the advantages of advanced technology, high yield rate which reaches 92.5% and excellent product purity which reaches 96.7%. The grain size of the product powder is not bigger than 100nm, the powder emits pale yellow light, and the color coordinates are as follow: x=0.5031, and Y=0.4458. The dysprosium coordinated compound can be used for preparing white light diodes, and is an ideal organic photoinduced rare earth luminescent material.

Description

technical field [0001] The invention relates to a preparation method of a dysprosium complex emitting light yellow light, and belongs to the technical field of preparation methods and applications of rare earth complexes of organic electroluminescent materials. Background technique [0002] Light-emitting diode LED is a new type of solid-state lighting source, referred to as SSL electric light source. Its principle and structure are different from the previous vacuum electric light source of incandescent lamp and fluorescent lamp. SSL electric light source has high luminous efficiency, energy saving and long life, and has great application value. [0003] White light diode LED is the most important light-emitting device. The conversion of white light by the phosphor of SSL electric light source is the key technology. It is very important to study the light-emitting material of white light LED. [0004] White light is formed by mixing polychromatic light, which can be mixed w...

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Problems solved by technology

[0004] White light is formed by mixing polychromatic light, which can be mixed with blue light and yellow light, and can also be mixed with blue, green, and red primary color lights to obtain white light; in rare earth complexes, due to effective energy transfer from intramolecular ligands to rare earth ions, Therefore, rare earth complexes have been widely used. As light-emitting materials for LED devices, rare earth complexes have narrow half-widths of fluorescence emission bands and high color lines, and have good development and utilization values; among them, rare earth complexes of europium and terbium are due to their respective It emits red light and green light and has been studied more. Compared with terbium, dysprosium has the lowest excited state energy level 4 f 9 / 2 It is 20830cm -1 , with the lowest excited state energy level of terbium 5 D. 4 20430cm -1 Similar, theoretically speaking, dysprosium can emit blue light at 480nm and yellow light at 572nm, but dysprosium complexes are difficult to find suitable ligands, and it is difficult to observe light with the eyes. At present, the invention of rare earth dysprosium complexes Not reported yet, it is a topic to be studied

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