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Electron transport layer ink, preparation method thereof and electroluminescence device

An electron transport layer and ink technology, which is applied to electric solid devices, electrical components, semiconductor devices, etc., can solve the problems of device preparation difficulties, and achieve the effects of simple preparation method, suppression of damage, and enhancement of electron injection and transmission capabilities.

Inactive Publication Date: 2019-08-27
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because most electron transport layer materials are materials dissolved in organic solvents, and after being configured into ink, there is a tendency to miscible with the light-emitting layer, which leads to difficulties in the preparation of devices in the full solution process.

Method used

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  • Electron transport layer ink, preparation method thereof and electroluminescence device
  • Electron transport layer ink, preparation method thereof and electroluminescence device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The electronic transport layer ink of the present invention, its components include organic small molecule electron transport material, 30wt%; alkali metal complex doping material, 0.1wt%; surface tension regulator, 0.1wt%; viscosity regulator , 0.1wt%; polar mixed solvent, 69wt%; auxiliary solvent, 0.7wt%.

[0033] 2,2'-(1,3-phenyl)bis[5-(4-tert-butylphenyl)-1,3,4-oxadiazole] is selected as the small organic molecule electron transport material. The alkali metal complex doping material is lithium 8-hydroxyquinolate. In the surface tension modifier, dimethylformamide is selected as a co-solvent, sodium alkylbenzenesulfonate as a surfactant, and hydroquinone as a small molecule compound for regulating surface tension;

[0034] The viscosity regulator is selected from amine compounds. The polar mixed solvent is a polyalcohol compound, and ethylene glycol is selected in this embodiment. The auxiliary solvent is selected from amide compounds.

[0035] This embodiment al...

Embodiment 2

[0037]The electronic transport layer ink of the present invention, its components include organic small molecule electron transport material, 10wt%; alkali metal complex doping material, 2wt%; surface tension regulator, 2wt%; viscosity regulator, 2wt% by weight percentage. %; polar mixed solvent, 80wt%; auxiliary solvent, 4wt%.

[0038] 1,3,5-tris(1-phenyl-benzo[D]pyrazol-2-yl)benzene is selected as the small organic molecule electron transport material. The alkali metal complex doping material is lithium 8-hydroxyquinolate.

[0039] In the surface tension regulator, cyclohexane is used as a co-solvent, sodium alkylbenzenetripolyethylene sulfonate is used as a surfactant, and imidazole and its derivatives are small molecular compounds for regulating surface tension.

[0040] The viscosity regulator is selected from ether compounds. The polar mixed solvent is a polyalcohol compound, and ethylene glycol is selected in this embodiment. The auxiliary solvent is selected from et...

Embodiment 3

[0043] The electron transport layer ink of the present invention, its component comprises organic small molecule electron transport material, 5wt% by weight percentage; Alkali metal complex doping material, 5wt%; Surface tension regulator, 5wt%; Viscosity regulator, 5wt% %; polar mixed solvent, 69wt%; auxiliary solvent, 11wt%.

[0044] 2,2'-(1,3-phenyl)bis[5-(4-tert-butylphenyl)-1,3,4-oxadiazole] is selected as the small organic molecule electron transport material. The alkali metal complex doping material is lithium 8-hydroxyquinolate. In the surface tension modifier, dimethylformamide is selected as a co-solvent, sodium alkylbenzenesulfonate as a surfactant, and hydroquinone as a small molecule compound for regulating surface tension;

[0045] The viscosity regulator is selected from amine compounds. The polar mixed solvent is a polyalcohol compound, and ethylene glycol is selected in this embodiment. The auxiliary solvent is selected from amide compounds.

[0046] Tests...

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Abstract

The invention discloses an electron transport layer ink, a preparation method thereof and an electroluminescence device. The electron transport layer ink is prepared from, by weight, 0.5-30% of an organic micro-molecular electron transport material, 0.1-5% of an alkali metal complex doping material, 0.1-5% of a surface tension modifier, 0.1-5% of a viscosity modifier, 69-99% of a polar mixed solvent and 0.1-30% of an auxiliary solvent. The electron transport layer ink, the preparation method thereof and the electroluminescence device have the advantages that the prepared electron transport layer ink can be formed in an electron transport layer through a printing technology, and the solvent in the electron transport layer ink can also be prevented from destroying the lower luminescent layer.

Description

technical field [0001] The invention relates to the fields of displays and the like, in particular to an electron transport layer ink, a preparation method thereof, and an electroluminescent device. Background technique [0002] Organic light-emitting diodes (OLEDs) are considered to be the most promising next-generation technology due to their own outstanding advantages such as self-illumination, high contrast, wide color gamut, large viewing angle, fast response speed, and flexible display. A new generation of flat panel display technology. At present, OLED products that have been commercialized are mainly prepared by high-vacuum thermal evaporation method, which has disadvantages such as complex equipment and process, high energy consumption, large waste of materials, and high cost. [0003] Printed display technology provides an effective way to prepare high-performance OLED products at low cost. Among them, the inkjet printing technology greatly improves the material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/36C09D11/38H01L51/50
CPCC09D11/36C09D11/38H10K50/165
Inventor 王士攀
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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