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Inorganic nano material ink and its preparation method and application, qled device

A technology of inorganic nanomaterials and inks, applied in inks, applications, electrical solid devices, etc., can solve the problems of easy volatilization, low viscosity of printing inks, and low boiling points, and meet the requirements of film formation, improve ink dispersion, and dissolve good sex effect

Active Publication Date: 2021-06-22
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 an inorganic nanomaterial ink, its preparation method and application, and a QLED device, aiming at solving the problem of low viscosity, low boiling point, and volatile ink used in existing inkjet printing. The problem

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  • Inorganic nano material ink and its preparation method and application, qled device

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Embodiment 1

[0063] The preparation method of the inorganic nano material ink of the present embodiment comprises:

[0064] In the case of stirring, add 10wt% oleylamine-coordinated red CdSe / ZnS quantum dots, 8wt% 1,1-bicyclohexane solvent, 82wt% difluoromethanesulfonamide, stir and mix for 30 minutes to obtain inorganic nano material ink.

[0065] The inorganic nano material ink of this embodiment was printed into a red quantum dot layer of 20×30um and a resolution of 200×200ppi by inkjet printing. Place the printed substrate on a hot stage and heat it to 100°C, vacuum 1×10 - 6 Volatilize and dry under Torr for 30 minutes to obtain a monochromatic quantum dot light-emitting layer.

[0066] The QLED device of this embodiment includes an anode 14, a hole transport layer 16, a light emitting layer 18, an electron transport layer 20 and a cathode 22 stacked on a substrate 12, wherein the light emitting layer is the quantum dot light emitting layer of this embodiment.

Embodiment 2

[0068] The preparation method of the inorganic nano material ink of the present embodiment comprises:

[0069] In the case of constant shaking, add 5wt% oleylamine-stabilized green CdZnSe / CdZnS, 20%wt dodecane, 25%wt decahydronaphthalene, 42wt% 1-hexanesulfonamide, shake and mix for 60 minutes to obtain inorganic Nanomaterial inks.

[0070] The inkjet printing method was used to print the inorganic nano material ink of this embodiment into a green quantum dot layer with a size of 20×30um and a resolution of 200×200ppi. Heating on the substrate to 180° C., volatilizing and drying under nitrogen flow for 30 minutes, to obtain a monochromatic quantum dot light-emitting layer.

[0071] The QLED device of this embodiment includes an anode 14, a hole transport layer 16, a light emitting layer 18, an electron transport layer 20 and a cathode 22 stacked on a substrate 12, wherein the light emitting layer is the quantum dot light emitting layer of this embodiment.

Embodiment 3

[0073] The preparation method of the inorganic nano material ink of the present embodiment comprises:

[0074] Add the following components to an approximately 500mL high-density polyethylene bottle, in the case of ultrasonic dispersion, the order of addition is: 20wt% oleylamine-stabilized blue CdS / CdZnS, green CdZnSe / CdZnS, red CdSe / ZnS quantum dots , 20wt% dipentylbenzene, 50%wt tetralin, 10wt% N-tert-butyl-3-chloropropane-1-sulfonamide, ultrasonically dispersed and mixed for 20 minutes to obtain an inorganic nanomaterial ink.

[0075] Through an inkjet printer, print a blue, green and red parallel quantum dot layer of 20×30um and a resolution of 200×200ppi.

[0076] Heat to 150°C on a hot plate, vacuum 1×10 -5 Volatilize and dry under Torr for 30 minutes to obtain a three-color quantum dot light-emitting layer.

[0077] The QLED device of this embodiment includes an anode 14, a hole transport layer 16, a light emitting layer 18, an electron transport layer 20 and a catho...

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Abstract

The invention discloses an inorganic nanomaterial ink, its preparation method and application, and a QLED device, comprising an inorganic nanomaterial with a mass fraction of 1% to 25% and an organic solvent with a mass fraction of 75% to 99%, wherein the organic solvent At least one sulfonamide organic solvent is included in the ink, and the mass fraction of the sulfonamide organic solvent in the inorganic nanomaterial ink is 5% to 85%. The inorganic nano material ink prepared by the invention has better dispersion performance and storage stability, and has proper viscosity and surface tension, and can meet the performance requirements of large-area printing and film formation.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/36C09D11/30H01L51/50
CPCC09D11/30C09D11/36H10K50/115H10K50/14H10K50/17H10K50/11
Inventor 李雪
Owner TCL CORPORATION
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