Ink and preparation method thereof

A technology of ink and magnetic nanoparticles, which is applied in the manufacture and application of ink, semiconductor/solid-state devices, etc., can solve problems such as carrier injection imbalance, affecting device luminous efficiency and stability, etc., to improve device performance and eliminate coffee Ring effect, the effect of simple method

Inactive Publication Date: 2019-10-01
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 an ink and its preparation method, aiming to solve the problem of unbalanced carrier injection in existing light-emitting diode devices, which affects the luminous efficiency and stability of the device

Method used

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Examples

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preparation example Construction

[0045] Another aspect of the embodiments of the present invention provides a method for preparing ink, comprising the following steps:

[0046] S01. Provide each component according to the formula of the above-mentioned ink;

[0047] S02. Disperse magnetic nanoparticles and electrode materials in an organic solvent, or disperse magnetic nanoparticles, electrode materials and surfactants in an organic solvent to obtain an ink.

[0048] The preparation method of the ink provided in the embodiment of the present invention only needs to disperse the magnetic nanoparticles and the electrode material, or the magnetic nanoparticles, the electrode material and the surfactant in the organic solvent, and the operation is simple and easy to control, and does not require strict conditions for mass production.

[0049] Specifically, in the above-mentioned step S01, the ink formula, the ratio of each component, the material and its preferred situation are as described above, and in order t...

Embodiment 1

[0061] A method for preparing ink, comprising the steps of:

[0062] S11. Provide magnetic nanoparticles Fe, electrode material Ag, mixed organic solvent and surfactant, described mixed organic solvent is made up of ethanol, 1,2-butanediol, described surfactant is ethanolamine, and various solvents all adopt The corresponding method removes water and oxygen and refines the purity to greater than 99.9%;

[0063] S12. Provide a reaction vessel such as a high-density polyethylene bottle, under the condition of stirring, add each component in the following order: 40wt% ethanol, 30wt% 1,2-butanediol, 25wt% Ag, 3wt% % Fe, 2wt% ethanolamine, and continue to stir the mixed solution for 1 h to obtain a dispersed ink.

Embodiment 2

[0065] A QLED device, comprising the following material layers sequentially stacked and combined: ITO / PEDOT:PSS (poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid) / TFB (poly(9,9-dioctyl Base fluorene-co-N-(4-butylphenyl) diphenylamine)) / quantum dots CdSe / ZnO / magnetic electrode (Ag electrode doped with magnetic iron).

[0066] The preparation method of the QLED device is:

[0067] Prepare ITO, PEDOT:PSS layer, TFB layer, CdSe layer, ZnO layer in sequence;

[0068]The ink prepared in Example 1 was used as an electrode material, and was printed on the ZnO layer by an inkjet printing device on the ZnO layer.

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Abstract

The invention provides ink. On the basis that the total weight of the ink is 100%, the ink is prepared from the following components by weight percent: 0.01-5.0% of magnetic nanoparticles, 0.01-30.0%of an electrode material and 65.0-99.0% of an organic solvent. The ink provided by the invention is formed by adding the magnetic nanoparticles into the electrode material and dispersing into the organic solvent, so that the magnetic nanoparticles are contained in a magnetic electrode formed by the ink-jet printing of the ink. The magnetic nanoparticles have a long-range ordered magnetic moment, and the movement of a carrier is subject to magneton, phonon and ferromagnetic / nonmagnetic interface scattering effect, so that the migration rate of the carrier is changed, and the carrier injection balance in a device is improved.

Description

technical field [0001] The invention belongs to the field of display technology, in particular to an ink and a preparation method thereof. Background technique [0002] Quantum Dot Light Emitting Diodes (Quantum Dot Light Emitting Diodes QLED) is a light-emitting device based on inorganic nanocrystal quantum dot materials. A strong contender for next-generation display technology. [0003] In a QLED device, the movable holes are usually transferred from the anode to the light-emitting layer through the hole injection and transport layer, and recombine with the electrons transferred from the cathode through the electron injection and transport layer to form excitons, and then the excitons radiate and emit photons. The problem of carrier balance has become an important factor affecting the luminous efficiency of QLED devices, especially multilayer QLED devices. However, it is worth noting that too many holes or electrons will generate a three-particle system, which will caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/30C09D11/38H01L51/52B05D1/02B05D5/00B05D7/24
CPCC09D11/30C09D11/38B05D1/02B05D5/00B05D7/24H10K50/805
Inventor 向超宇王雄志李雪张滔
Owner TCL CORPORATION
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