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Acrylate copolymer-modified metal oxide, QLED and preparation method

A technology of acrylate and copolymer, which is applied in the field of light-emitting diodes, can solve the problems of structural defects of electron transport materials, low transport and light transmittance of electron transport layers, etc., to improve electron transport capacity, surface potential and dispersion Effect

Active Publication Date: 2018-11-02
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 a metal oxide modified by an acrylate copolymer, a QLED device and a preparation method, aiming at solving the problem that the existing electron transport materials have many structural defects, which lead to defects in the electron transport layer. The problem of low transmission and light transmission

Method used

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  • Acrylate copolymer-modified metal oxide, QLED and preparation method
  • Acrylate copolymer-modified metal oxide, QLED and preparation method
  • Acrylate copolymer-modified metal oxide, QLED and preparation method

Examples

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Effect test

Embodiment 1

[0059] The preparation steps of the zinc oxide nanoparticle dispersion liquid modified by acrylate copolymer are as follows:

[0060] (1) Use ethylene glycol monomethyl ether as solvent to prepare 10ml of 30mg / ml zinc acetate solution and 2ml of 200mg / ml tetramethylammonium hydroxide solution respectively. Use xylene as a solvent to prepare a 50mg / ml acrylate copolymer solution;

[0061] (2) Heat the zinc acetate solution described in (1) to 80°C, stir it with a magnet at a speed of 1500 rpm to fully dissolve it, and then pour the prepared tetramethylammonium hydroxide solution at a uniform speed Inject into the zinc acetate solution, keep stirring for several minutes, add 10mL of the acrylate copolymer solution described in (1), keep the temperature at 60°C, and stir for 1h to obtain a mixed solution;

[0062] (3) Add methanol solution to the mixture to purify the acrylate copolymer-modified zinc oxide nanoparticles, take the mixture and centrifuge (8000 rpm, 5 min), remove ...

Embodiment 2

[0073] First prepare the zinc oxide nanoparticle precipitation of acrylate copolymer modification according to the same method as in Example 1, then use octadecane solution to redisperse the zinc oxide nanoparticle modification of acrylate copolymer to obtain a final concentration of about 3mg / ml Acrylate Copolymer Modified Zinc Oxide Nanoparticle Dispersion.

[0074] Prepare the QLED device according to the method of Example 1, the difference is that the vacuum-evaporated hole transport layer and the vacuum-evaporated quantum dot light-emitting layer are used: the triphenylamine compound 4,4'-di-(N-naphthyl-N -Phenylamino)biphenyl (NPB) as the hole transport layer, using a vacuum coating machine at 3×10 -4 The NPB film layer was vacuum thermally evaporated at a vacuum degree of Pa with a thickness of 30 nm. Using vacuum coating machine in 3×10 -4 The quantum dot light-emitting layer was vapor-deposited on the hole transport layer at a vacuum degree of Pa.

[0075] In summa...

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Abstract

The invention discloses an acrylate copolymer-modified metal oxide, a QLED and a preparation method. The method comprises the steps of adding an acrylate copolymer solution to a pre-prepared metal oxide solution under a certain atmosphere and then stirring at 60-80 DEG C for 0.5-8h to obtain a mixed solution; and adding a solvent to purify the mixed solution and carrying out centrifugal separationto obtain a white precipitate, wherein the white precipitate is the acrylate copolymer-modified metal oxide. The metal oxide is modified by using an acrylate copolymer, so that on one hand, the acrylate copolymer-modified metal oxide can play roles in passivating surface defects of the metal oxide and reducing exciton quenching and carrier recombination through the surface defects, and on the other hand, the surface potential of the metal oxide can be improved, thereby improving the electron injection level and the electron transport capacity; and furthermore, the acrylate copolymer is capable of improving the dispersity of metal oxide nanoparticles, thereby facilitating formation of a smooth film and improvement of the transmittance of the film.

Description

technical field [0001] The invention relates to the technical field of light emitting diodes, in particular to a metal oxide modified by an acrylate copolymer, a QLED device and a preparation method. Background technique [0002] Quantum dots (quantum dots) are nanocrystals with three dimensions on the order of nanometers. Due to their unique optical characteristics, such as adjustable luminescence spectrum, extremely narrow half-peak width of luminescence, and high luminous efficiency, quantum dot materials are made into Quantum Dot Light Emitting Diode (QLED for short), which can achieve a better color gamut than organic light-emitting diode (Organic Light-Emitting Diode, OLED for short) display devices, is expected to become the next generation of flat panel technology. choose. [0003] The basic structure of quantum dot light-emitting diodes is anode / light-emitting layer / cathode. The carrier injection and transport capability of a device is an important criterion to me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/56H01L51/54
CPCH10K50/115H10K50/165H10K50/16H10K2102/00H10K50/00H10K71/40
Inventor 杨成玉杨一行
Owner TCL CORPORATION
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