Quantum dot printing ink and preparation method thereof, and quantum dot light emitting diode

A technology of quantum dots and inks, which is applied in the field of quantum dot inks and their preparation, and quantum dot light-emitting diodes, which can solve the problems of poor charge transmission efficiency of the quantum dot light-emitting layer, achieve excellent electroluminescence performance, reduce threshold voltage, and improve energy efficiency Effect

Inactive Publication Date: 2015-12-09
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a quantum dot ink, which aims to solve the problem that the existing quantum dot light-emitting layer has poor charge transport effectiveness and needs to increase the threshold voltage to enhance the charge transport effectiveness.

Method used

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  • Quantum dot printing ink and preparation method thereof, and quantum dot light emitting diode
  • Quantum dot printing ink and preparation method thereof, and quantum dot light emitting diode
  • Quantum dot printing ink and preparation method thereof, and quantum dot light emitting diode

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preparation example Construction

[0050] Correspondingly, the embodiment of the present invention also provides a preparation method of quantum dot ink, comprising the following steps:

[0051] S01. Weighing the formula components of the quantum dot ink;

[0052] S02. Dissolving the quantum dots, charge transport agent, dispersant and viscosity regulator in a solvent to form a blend;

[0053] S03. The blend is mixed.

[0054] Specifically, in the above step S01, the formulation of the quantum dot ink and its preferred components and contents have been stated above, and will not be repeated here to save space.

[0055] In the above step S02, the quantum dots, the charge transport agent, the dispersant and the viscosity modifier are dissolved in the solvent, and the method is not limited. As a preferred embodiment, the quantum dots are dissolved in the solvent first, and then other components are added. As another preferred embodiment, polar components such as the quantum dots, etc., can be dissolved in the m...

Embodiment 1

[0062]A kind of quantum dot ink, with the weight percent of described quantum dot ink being 100%, comprising such as Table 1 below Components by weight percentage shown in Example 1, wherein the quantum dots are red CdSe / ZnS quantum dots stabilized by oleylamine, and the charge transport agent is polyvinylcarbazole PVK, and its structure is as follows: 10), the main solvent is high-purity chlorobenzene, the co-solvent is dimethylformamide, the dispersant is betaine surfactant, and the viscosity modifier is glycerol.

[0063]

[0064] The preparation method of described quantum dot ink, comprises the following steps:

[0065] S11. Weighing the formula components of the above-mentioned quantum dot ink;

[0066] S12. under stirring condition, each component is added in the 500mL high-density polyethylene bottle containing solvent, forms blend;

[0067] S13. Stir and mix the blend for 30 minutes to obtain a quantum dot ink.

[0068] Further, the quantum dot ink is printed i...

Embodiment 2

[0070] Three kinds of quantum dot inks, based on the weight percentage of the quantum dot inks as 100%, include such as Table 1 below The components in weight percent shown in Example 2, wherein the quantum dots are oleylamine-stabilized quantum dots, and the charge transport agent is a polyaniline derivative poly-TPD, and its structure is shown in the following structural formula (11) , the main solvent is high-purity toluene, the co-solvent is dimethyl sulfoxide, the dispersant is an ethoxylated fatty amine surfactant, and the viscosity modifier is propylene glycol n-propyl ether.

[0071] The quantum dots in the first quantum dot ink are blue CdS / CdZnS quantum dots, the quantum dots in the second quantum dot ink are green CdZnSe / CdZnS quantum dots, and the third quantum dot ink is red CdSe / ZnS quantum dots quantum dots.

[0072]

[0073] The preparation method of described quantum dot ink, comprises the following steps:

[0074] S11. Weighing the formula components of...

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Abstract

The invention provides a quantum dot printing ink and a preparation method thereof, and a quantum dot light emitting diode, belonging to the technical field of quantum dot luminescence. The quantum dot printing ink comprises, on the basis that the weight percentage content of the quantum dot printing ink is 100%, 0.1 to 20.0% of quantum dot, 0.1 to 15.0% of a charge transferring agent, 40.0 to 90.0% of a solvent, 0.1 to 15.0% of a viscosity conditioning agent and 0 to 15% of a dispersing agent, wherein the solvent comprises a main solvent and a cosolvent. The quantum dot printing ink provided by the invention contains the charge transferring agent capable of facilitating charge transfer, so charge transfer of a quantum dot luminescent layer prepared from the quantum dot printing ink is more effective; thus, threshold voltage is reduced, and energy efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of quantum dot luminescence, and in particular relates to a quantum dot ink, a preparation method thereof, and a quantum dot light emitting diode. Background technique [0002] Quantum dot organic light emitting device (quantum dot organic light emitting device, QLED) is a light emitting device with a new structure formed by combining organic materials and highly efficient light emitting inorganic nanocrystals. Due to the advantages of high color gamut and self-illumination of quantum dot light-emitting diode displays, its application prospects are very exciting, and it is the frontier direction of display technology research and development in various countries around the world. Quantum dot (QD) luminescent materials have the characteristics of changing emission frequency with the size of quantum dot nanoparticles, narrow emission peak, relatively high luminescent quantum efficiency, ultra-high photostabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/30C09D11/38H01L51/50H01L51/54
Inventor 李雪付东
Owner TCL CORPORATION
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