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

A technology of inkjet printing and quantum dots, which is applied in the field of quantum dots, can solve the problems of ink viscosity and surface tension that cannot meet the requirements, achieve the effect of convenient charge transmission, meet the requirements of film formation, and reduce the starting voltage

Inactive Publication Date: 2016-11-16
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] 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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  • Quantum dot printing ink for ink-jet printing and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Add the following components into an approximately 500mL one-necked flask, and under stirring, the order of addition is: 14wt% oleylamine-stabilized red CdSe / ZnS quantum dots, 52wt% dodecane solvent, 33.5wt% ethylene glycol- Butyl ether, 0.5wt% sodium phthalene sulfonate, and the mixture was stirred for 30 minutes to obtain a quantum dot ink.

[0072] Printed into a red quantum dot layer of 20×30um with a resolution of 200×200ppi by an inkjet printer.

[0073] Place the red quantum dot layer at a power of 5mW / cm 2 Under the low-pressure mercury lamp, the main emission wavelength is 253.7nm, and the irradiation time is 20min. Then heated to 100°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 2

[0075] Add the following components to an approximately 500 mL high-density polyethylene bottle with stirring in the following order: 10 wt% oleylamine-stabilized green CdZnSe / CdZnS, 23% wt dodecane, 40 wt% decahydronaphthalene, 26wt% 3-dibenzyl ether, 1wt% thermally degradable decomposable surfactant, stirred the mixture for 30 minutes to obtain quantum dot ink.

[0076] With an inkjet printer, it is printed into a green quantum dot layer of 20×30um and a resolution of 200×200ppi.

[0077] Heating to 180° C. on a hot plate, volatilizing and drying under nitrogen flow for 30 minutes, to obtain a monochromatic quantum dot light-emitting layer.

[0078]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 meet the film-forming requirements of printers. A quantum dot light-emitting layer with a pixel lattice can be deposited and ...

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Abstract

The invention discloses quantum dot printing ink for ink-jet printing and a preparing method thereof. The quantum dot printing ink is prepared from, by weight, 0.01-20.0% of quantum dot, 60.0-95.0% of solvent and 0.01-20.0% of dissoluble surfactant. The quantum dot printing ink prepared according to the formula has proper viscosity and surface tension, and the requirement for film-forming property of a printer can be met. Through ink-jet printing, a quantum dot luminescent layer with a pixel matrix can be formed through sedimentation; meanwhile, an organic matter composition in a quantum dot film prepared through printing can be decomposed into small molecules under the action of heating and / or ultraviolet irradiation, and then removed through volatilization under heating and / or pressure reduction; in this way, charge transfer of the quantum dot luminescent layer can be conducted conveniently, starting voltage can be reduced, and then composite radioluminescence of electrons and holes can be achieved.

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 are quasi-zero-dimensional nanomaterials composed of a small number of atoms. The size of quantum dots is very small, and its particle size is generally between 1-20nm. With quantum confinement effect, the continuous energy band structure becomes a discrete energy level structure with molecular characteristics, which can emit fluorescence after being excited. 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-s...

Claims

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Application Information

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IPC IPC(8): C09D11/38C09D11/30
CPCC09D11/30C09D11/38
Inventor 李雪
Owner TCL CORPORATION
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