Organic electroluminescent device and producing method thereof

An electroluminescent device, organic technology, applied in the direction of electroluminescent light sources, chemical instruments and methods, electric light sources, etc., can solve problems such as difficult purification, achieve firm adhesion, improve thermal stability and film-forming performance, and high thermal stability sexual effect

Inactive Publication Date: 2006-03-22
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But on the other hand, polymer materials are difficult to purify, and the purity can only be roughly controlled by measuring the molecular weight. However, the use of small molecule materials can be easily purified to the ultra-high purity required for the preparation of OLEDs by sublimation and other methods.

Method used

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  • Organic electroluminescent device and producing method thereof
  • Organic electroluminescent device and producing method thereof
  • Organic electroluminescent device and producing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0044] The organic electroluminescence material of the present invention is prepared by a synthesis method in an organic solvent. The steps adopted include two parts: one is the synthesis of the corresponding tridentate ligand, and the other is the synthesis of the target complex.

[0045] The synthesis method of the related tridentate ligand in the first step adopts a Schiff base (Schiff base) synthesis method. The specific process is to directly mix and heat the aromatic aldehyde containing the o-hydroxyl in the stoichiometric ratio and the aromatic amine containing the o-hydroxyl in the solid phase, or heat and reflux the reaction in an alcohol solvent to obtain the crude product of the corresponding Schiffer base. Then by the method of recrystallization in organic solvent, it is easy to obtain the product with high purity.

[0046] The synthesis of the target compound in the second step adopts inorganic salts of trivalent metals (such as gallium, aluminum, indium, iridium...

Embodiment 1

[0047] Embodiment 1: the synthesis of compound 1

[0048] Synthesis of ligand salicylaldehyde ortho-aminophenol:

[0049] Weigh 1.22 grams (0.01 mol) of salicylaldehyde and put it into a reaction bottle, add 1.09 grams (0.01 mol) of equimolar o-aminophenol, and heat directly, that is, a red substance will be produced. After the reaction is completed, use ethanol to recrystallize to obtain The needle-like product, salicylaldehyde-o-aminophenol, was obtained in 85% yield.

[0050] Synthesis of compound 1:

[0051] In a three-neck flask equipped with a stirring device, add 20 milliliters of 0.88 grams (0.005 moles) of anhydrous aluminum trichloride in ethanol. Completely dissolve 0.5 g (0.005 mol, 0.5 ml) of acetylacetone in a mixed solution of 5 ml of ethanol and 0.43 g (0.005 mol) of hexahydropyridine, slowly drop this solution into the above solution while stirring, and continue to Stir for 5 minutes. 1.065 grams (0.005 moles) of salicylaldehyde o-aminophenol was completel...

Embodiment 2

[0053] Embodiment 2: the synthesis of compound 2

[0054] Synthesized according to the method of compound 1, replacing aluminum chloride with gallium chloride, the pure product of (acetylacetonate)-(salicylaldehyde orthoaniline phenol)gallium(III) (compound 2) can be obtained. Mass spectrum: m / e, 380; elemental analysis (C18H16GaNO4): experimentally determined C: 58.007%, H: 4.309% N: 3.759%; theoretical value: C: 58.065%, H: 4.301%, N: 3.763%

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Abstract

An organic electroluminescent device is composed of substrate, anode layer, organic function layer including a luminescent layer which is a metal complex, and cathodes layer. Said luminescent layer is prepared by ink-jet print. Its advantages are high thermal stability and luminescent efficient, low glowing voltage, and high luminescent quantum efficiency of said luminescent layer.

Description

technical field [0001] The invention relates to an organic electroluminescence device and a preparation method thereof. Background technique [0002] Today, with the development of multimedia technology and the advent of the information society, the requirements for the performance of flat panel displays are getting higher and higher. Three new display technologies emerging in recent years: plasma display, field emission display and organic light emitting device (OLED), all make up for the shortcomings of cathode ray tubes and liquid crystal displays to a certain extent. Among them, OLED has a series of advantages such as self-illumination, low-voltage DC drive, full curing, wide viewing angle, and rich colors. Compared with liquid crystal displays, OLED does not require a backlight source, has a large viewing angle, low power, and its response speed is faster than that of liquid crystal displays. 1000 times higher than that of a liquid crystal d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/14C09K11/06H01L33/00
Inventor 邱勇乔娟段炼王立铎
Owner TSINGHUA UNIV
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