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Ink and preparation method thereof

An ink and magnetic nanoparticle technology, applied in inks, semiconductor/solid-state device manufacturing, nanotechnology and other directions, can solve the problems of unbalanced carrier injection, affecting the luminous efficiency and stability of devices, and improve device performance, improve The effect of carrier injection balance, improving device efficiency and stability

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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preparation example Construction

[0049] Another aspect of the embodiments of the present invention provides a method for preparing ink, comprising the following steps:

[0050] S01. Provide each component according to the formula of the above-mentioned ink;

[0051] S02. Dispersing the magnetic nanoparticles and the carrier transport material in an organic solvent to obtain an ink.

[0052] The preparation method of the ink provided in the embodiment of the present invention only needs to disperse the magnetic nanoparticles and the carrier transport material in the organic solvent, or disperse the magnetic nanoparticles, the carrier transport material and the surfactant in the organic solvent. Yes, the operation is simple and easy to control, no harsh conditions are required, and mass production can be realized.

[0053] 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 to save space, deta...

Embodiment 1

[0064] A method for preparing ink, comprising the steps of:

[0065] S11. Provide magnetic nanoparticles ferric oxide, carrier transport material PVK, toluene and N,N dimethylformamide DMF;

[0066] S12. Dissolve PVK in the mixed solution of toluene and N,N dimethylformamide DMF, then add the toluene solution of ferroferric oxide, and obtain the magnetic nanoparticle composite organic material Fe after ultrasonic dispersion 3 o 4 &PVK ink. Wherein, the weight ratio of each component in the ink is as follows: 5wt% Fe 3 o 4 , 36wt% PVK, 40wt% toluene and 19wt% DMF.

Embodiment 2

[0068] A QLED device, including the following material layers sequentially stacked and combined: ITO / PEDOT:PSS (poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid) / Fe 3 o 4 &PVK / Poly-TPD (poly[bis(4-phenyl)(4-butylphenyl)amine]) / quantum dot CdSe / ZnO / Al electrode.

[0069] The preparation method of the QLED device is:

[0070] Provide ITO substrate, prepare PEDOT:PSS on the ITO substrate;

[0071] The magnetic nanoparticles composite organic material Fe prepared in Example 1 3 o 4 &PVK ink is printed on the PEDOT:PSS layer by inkjet printing equipment as a hole transport layer;

[0072] A Poly-TPD layer, a quantum dot CdSe layer, and a ZnO layer are sequentially deposited on the hole transport layer, and an Al electrode is prepared 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: 0.01-15.0% of magnetic nanoparticles, 0.2-40.0%of a carrier transport material and 45.0-99.0% of an organic solvent, wherein the carrier transport material is prepared from an organic material.

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): C09D11/30C09D11/38B82Y30/00B82Y40/00H01L51/50
CPCC09D11/30C09D11/38B82Y30/00B82Y40/00H10K50/115
Inventor 王雄志向超宇张滔
Owner TCL CORPORATION
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