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Quantum dot ink used for ink-jet printing and preparation method thereof

An inkjet printing and quantum dot technology, applied in the field of quantum dots, can solve problems such as the introduction of more film materials, the viscosity and surface tension of quantum dot inks cannot meet the requirements, and achieve the effect of meeting the requirements of film formation.

Inactive Publication Date: 2016-12-07
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a quantum dot ink for inkjet printing and its preparation method, aiming to solve the problem that the viscosity and surface tension of the quantum dot ink for inkjet printing cannot meet the requirements , the problem of introducing more organic materials into the film layer material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The mixed solvent is composed of dodecane and ethylene glycol-butyl ether, wherein ethylene glycol-butyl ether is 40% of the total weight of the solvent.

[0063] Add the following components to about 500mL single-necked flask, under stirring, the order of addition is: 15wt% oleylamine-stabilized red CdSe / ZnS quantum dots, 51wt% dodecane solvent, 34wt% ethylene glycol monobutyl base ether, and stirred the mixture for 30 minutes to obtain a quantum dot ink.

[0064] Printed into a red quantum dot layer of 20×30um with a resolution of 200×200ppi by an inkjet printer.

[0065] Heating to 100°C on a hot plate, nitrogen flow vacuum 1×10 -6 Volatilize and dry under Torr for 30 minutes to obtain a monochromatic quantum dot light-emitting layer.

Embodiment 2

[0067] The mixed solvent is composed of decahydronaphthalene and dibenzyl ether, wherein the dibenzyl ether is 30% of the total weight of the solvent.

[0068] Add the following components to an approximately 500 mL HDPE bottle with stirring in the following order: 10 wt% oleylamine-stabilized green CdZnSe / CdZnS, 23 wt% dodecane, 40 wt% decahydronaphthalene, 27 wt% % 3-Dibenzyl ether stirred the mixture for 30 minutes to obtain quantum dot ink.

[0069] Through an inkjet printer, it is printed into a green quantum dot layer of 20×30um and a resolution of 200×200ppi.

[0070] Heat to 180°C on a hot plate, vacuum 1×10 -6 Volatilize and dry under Torr for 30 minutes to obtain a monochromatic quantum dot light-emitting layer.

Embodiment 3

[0072] The mixed solvent is composed of dodecane, decalin, dibenzyl ether and ethylene glycol dibenzyl ether, wherein dibenzyl ether and ethylene glycol dibenzyl ether are 40% of the total weight of the solvent.

[0073] Add the following components to an approximately 500mL high-density polyethylene bottle under stirring in the following order: 10wt% oleylamine-stabilized blue CdS / CdZnS quantum dots, green CdZnSe / CdZnS quantum dots, and red CdSe / ZnS quantum dots, 24wt% dodecane, 30wt% decahydronaphthalene, 18wt% 3-dibenzyl ether, and 18wt% ethylene glycol dibenzyl ether were stirred for 30 minutes to obtain a quantum dot ink composition.

[0074] Through an inkjet printer, it is printed into a blue, green and red side-by-side quantum dot layer with a resolution of 200×200ppi and 20×30um.

[0075] Heat to 180°C on a hot plate, vacuum 1×10 -6 Volatilize and dry under Torr for 30 minutes to obtain a three-color quantum dot light-emitting layer.

[0076] In summary, the quantu...

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PUM

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Abstract

The invention discloses quantum dot ink used for ink-jet printing and a preparation method thereof. The quantum dot ink comprises the following ingredients in parts by weight: 5-20% of quantum dot and 80.0-95.0% of solvent, wherein the solvent comprises at least one alkane and / or arene organic solvent and at least one small molecule ether organic solvent, and the dosage of the small molecule ether organic solvent is 1.0-80.0% of the total weight of the solvent. The quantum dot ink has proper viscosity and surface tension, the requirement of an ink-jet printer on membrane performance can be met, and the ink-jet printing way of a quantum dot luminescent layer is realized. Through the ink-jet printing method, the quantum dot luminescent layer with a pixel dot matrix is formed by deposition; meanwhile, through post-processing, organic substances in the quantum dot luminescent layer prepared by printing can volatilize, so that the electric charge transmission of the quantum dot luminescent layer can be conveniently carried out, starting voltage is lowered, and therefore, electrons and cavities can carry out compound radiation luminescence.

Description

technical field [0001] The invention relates to the technical field of quantum dots, in particular to a quantum dot ink for inkjet printing and a preparation method thereof. Background technique [0002] Quantum dot (QD) luminescent materials have the characteristics of changing emission frequency with size change, narrow emission line width, relatively high luminescence quantum efficiency, ultra-high photostability and solution processing. These characteristics make quantum dot light-emitting diodes (QLEDs) with quantum dot materials as the light-emitting layer have broad application prospects in solid-state lighting, flat panel display and other fields, and have attracted extensive attention from academia and industry. [0003] The solution processing characteristics of quantum dots make the quantum dot light-emitting layer can be prepared by various methods such as spin coating, scraping coating, spraying, and inkjet printing. Compared with the previous methods, the inkj...

Claims

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Application Information

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IPC IPC(8): C09D11/36C09D11/38
CPCC09D11/36C09D11/38
Inventor 李雪
Owner TCL CORPORATION
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