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

An inkjet printing and quantum dot technology, applied in the field of quantum dots, can solve the problems of ink viscosity and surface tension not meeting the requirements

Inactive Publication Date: 2015-11-18
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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 a preparation method thereof, aiming at solving the problem that the ink viscosity and surface tension of the existing inkjet printing cannot meet the requirements, and the film The problem of layer materials introducing more organic materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Add the following components to about 500mL single-necked flask, under stirring, the order of addition is: 11.6wt% oleylamine-stabilized red CdSe / ZnS quantum dots, 80wt% high-purity chlorobenzene solvent, 3wt% isopropanol and 0.4wt% toluene surface tension regulator, 5wt% viscosity regulator glycerin, and the mixture was stirred for 30 minutes to obtain a quantum dot ink composition.

[0058] Print a quantum dot luminescent layer of 70×200um with a resolution of 80×80ppi by an inkjet printer.

[0059] Heat to 100°C on a hot plate, vacuum 1×10 -3 Volatilize and dry under Torr for 30 minutes to obtain a monochromatic quantum dot light-emitting layer.

Embodiment 2

[0061] Add the following components to an approximately 500mL high-density polyethylene bottle with stirring in the following order: 9 wt% oleylamine-stabilized blue CdS / CdZnS, (green CdZnSe / CdZnS, red CdSe / ZnS quantum dots ), 85%wt high-purity n-heptane, 3wt% 3-dimethylaminopropionate surface tension modifier, 3wt% propylene glycol n-propyl ether viscosity modifier, and stirred the mixture for 30min to obtain a quantum dot ink composition.

[0062] Through an inkjet printer, it is printed into a blue, green, and red side-by-side quantum dot layer with a resolution of 80×80ppi and 50×150um.

[0063] Heating to 100° C. on a hot plate, volatilizing and drying under nitrogen flow for 30 minutes, to obtain a three-color quantum dot light-emitting layer.

[0064] In summary, the quantum dot ink for inkjet printing provided by the present invention and the preparation method thereof, the prepared quantum dot ink has appropriate viscosity and surface tension, and can be deposited to fo...

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Abstract

The invention discloses quantum dot printing ink for ink-jet printing and a preparation method thereof. The quantum dot printing ink comprises, by weight, 0.1-20.0% of quantum dots, 40.0-90.0% of solvent, 0-20.0% of viscosity modifiers and 0-20.0% of surface tension modifiers. According to the formula, the obtained quantum dot printing ink has the certain viscosity, surface tension and volatilization property and can meet the requirements of a current ink-jet printer for the viscosity and surface tension, an ink-jet printing mode of a quantum dot light emitting layer is achieved, and the quantum dot light emitting layer with pixel matrixes, the high resolution and the electroluminescent performance is obtained. Meanwhile, printing ink compositions such as organic molecules in the printed and prepared quantum dot layer can be volatilized completely through the proper volatilization performance of the printing ink, therefore, the quantum dots can be arranged compactly, charge transportation among the quantum dots is effective, the turn-on voltage is reduced, and the energy efficiency is improved.

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 dots, also known as semiconductor nanocrystals, are nanocrystalline particles with a radius smaller than or close to the radius of the Bohr excitons. The size of quantum dots is very small, and its particle size is generally between 2-20nm. Quantum dots have a quantum confinement effect, and the continuous energy band structure becomes a discrete energy level structure with molecular characteristics. After being excited, it can emit fluorescence. Quantum dots have unique luminescence characteristics, and the emission frequency changes with the size of quantum dot nanoparticles. , narrow emission peak, relatively high luminous quantum efficiency, ultra-high photostability and solution processing (inkjet printing) characteristics. Quantum dot electroluminescent devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/38
Inventor 李雪谢相伟付东
Owner TCL CORPORATION
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