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Ionic cathode buffer layer molecule type material, preparation method and applications thereof

A cathode buffer layer, ionic technology, applied in the direction of chemical instruments and methods, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the application limitations, it is difficult to resist the erosion of weak polar solvents, and it is easy to be partially or completely washed away and other problems, to achieve the effects of corrosion resistance, good alcohol solubility and solution processability, and good film shape stability

Inactive Publication Date: 2015-08-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most organic small molecule cathode interface materials are difficult to resist the erosion of weak polar solvents, that is, the active layer is easily washed off partially or completely when spin-coated, and its application in organic optoelectronic devices with inverted structures is limited.

Method used

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  • Ionic cathode buffer layer molecule type material, preparation method and applications thereof
  • Ionic cathode buffer layer molecule type material, preparation method and applications thereof
  • Ionic cathode buffer layer molecule type material, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The structural formula of the ion type cathode buffer layer molecular material in the present embodiment is as follows:

[0051]

[0052] The preparation process of the ion type cathode buffer layer molecular type material of the present embodiment is as follows:

[0053] Step 1: Preparation of (2-bromo-6-naphthyl)diphenylphosphine (1)

[0054]

[0055] in N 2 Under atmosphere, 2,6-dibromonaphthalene (3 g, 10.5 mmol) was dissolved in dry tetrahydrofuran (200 mL), cooled to -78°C. n-BuLi (2.4M solution in hexane, 4.8 mL, 11.55 mmol) was added dropwise via syringe. in N 2 Stir at atmosphere and temperature for 40 minutes, then diphenylphosphine chloride (2.3 mL, 12.6 mmol) is added via syringe. The mixture was slowly returned to room temperature, under N 2 Stirring was continued overnight under atmosphere. After the reaction was completed, a small amount of ethanol was added to terminate the reaction. After the tetrahydrofuran was distilled off under reduced p...

Embodiment 2

[0072] The structural formula of the ion type cathode buffer layer molecular material in the present embodiment is as follows:

[0073]

[0074] The preparation process of the ion type cathode buffer layer molecular type material of the present embodiment is as follows:

[0075] Step 1: Preparation of (2-bromo-6-naphthyl)diphenylphosphine (1)

[0076]

[0077] in N 2 Under atmosphere, 2,6-dibromonaphthalene (3 g, 10.5 mmol) was dissolved in dry tetrahydrofuran (200 mL), cooled to -78°C. n-BuLi (2.4M solution in hexane, 4.8 mL, 11.55 mmol) was added dropwise via syringe. in N 2 Stir at atmosphere and temperature for 40 minutes, then diphenylphosphine chloride (2.3 mL, 12.6 mmol) is added via syringe. The mixture was slowly returned to room temperature, under N 2 Stirring was continued overnight under atmosphere. After the reaction was completed, a small amount of ethanol was added to terminate the reaction. After the tetrahydrofuran was distilled off under reduced p...

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Abstract

The present invention discloses an ionic cathode buffer layer molecule type material, wherein an aryl phosphorus oxygen group is introduced into an ammonium radical ion salt, such that the alcohol solubility and the amorphous property are high, the solubility in the weakly polar solvent can be reduced, and the erosion of the weakly polar solvent can be resisted. The present invention further discloses a preparation method and applications of the ionic cathode buffer layer molecule type material. Compared with the existing organic small molecule cathode buffer layer material, the ionic cathode buffer layer molecule type material of the present invention is used in the multilayer solution processing inversion device structure.

Description

technical field [0001] The invention relates to an alcohol-soluble cathode buffer layer material, in particular to an ion-type cathode buffer layer molecular material and its preparation method and application. Background technique [0002] Organic optoelectronic devices with an inverted structure can avoid the use of metals with low work function as cathodes, which is beneficial to improve device stability. Therefore, it is of great significance to apply cathode buffer layer materials to inverted optoelectronic devices. [0003] Organic small molecule cathode interface materials have the advantages of definite chemical structure, high purity, and excellent synthesis and purification repeatability, and have very good applications in traditional organic optoelectronic devices. However, most organic small molecule cathode interface materials are difficult to resist the erosion of weak polar solvents, that is, the active layer is easily washed off partially or completely when s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/53C07F9/6561H01L51/54H01L51/46
CPCC07F9/53C07F9/6561
Inventor 朱旭辉谭婉怡李敏张建刘刚彭俊彪曹镛
Owner SOUTH CHINA UNIV OF TECH
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