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Inorganic nano-material ink, preparation method and application thereof, and QLED device

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

Active Publication Date: 2019-01-22
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 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

Method used

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  • Inorganic nano-material ink, preparation method and application thereof, and QLED device
  • Inorganic nano-material ink, preparation method and application thereof, and QLED device
  • Inorganic nano-material ink, preparation method and application thereof, and 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, and 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 ...

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Abstract

The invention discloses an inorganic nano-material ink, a preparation method and application thereof, and a QLED device. The quantum dot ink comprises: 1%-25% mass fraction of an inorganic nano-material and 75%-99% mass fraction of an organic solvent, wherein the organic solvent comprises at least one sulfonamide organic solvent, and the mass fraction of the sulfonamide organic solvent in the inorganic nano-material ink is 5%-85%. The inorganic nano-material ink prepared by the invention has good dispersion performance and storage stability, at the same time has appropriate viscosity and surface tension, and can meet the performance requirements of large-area printing into films.

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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IPC IPC(8): C09D11/36C09D11/30H01L51/50
CPCC09D11/30C09D11/36H10K50/115H10K50/14H10K50/17H10K50/11
Inventor 李雪
Owner TCL CORPORATION