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Substrate and preparation method thereof, light-emitting device, and display screen

A light-emitting device and substrate technology, which is applied in the direction of electric solid-state devices, semiconductor devices, organic semiconductor devices, etc., can solve the problems of poor thermal conductivity of the substrate, and achieve the effects of low thermal expansion coefficient, excellent electrical insulation performance, and good corrosion resistance

Active Publication Date: 2019-07-05
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a substrate and its preparation method, and a light-emitting device, aiming to solve the problem of poor thermal conductivity of the substrate in the existing light-emitting devices

Method used

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  • Substrate and preparation method thereof, light-emitting device, and display screen
  • Substrate and preparation method thereof, light-emitting device, and display screen
  • Substrate and preparation method thereof, light-emitting device, and display screen

Examples

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Embodiment 1

[0073] (1) Nanosheets were prepared by ball milling hexagonal boron nitride particles for 48 hours and ultrasonicating for 5 hours.

[0074] (2) Mix the above-mentioned hexagonal boron nitride nanosheets with ethanolamine and ethanol solvent, adjust the pH to 8.5, and stir at room temperature for 24 hours, then wash and dry with deionized water to obtain hexagonal boron nitride that has been alcoholized on the surface Nanosheets. Wherein, the -H hydroxylation on the surface of the hexagonal boron nitride after alcoholization treatment forms hydroxyl boron nitride.

[0075] (3) Add cellulose, sodium hydroxide, and urea to deionized water, and mix well to obtain a mixed solution. In the mixed solution, the concentration of cellulose is 45 mg / ml, and the concentration of sodium hydroxide is 53 mg / ml, the concentration of urea is 115 mg / ml. After the above mixed solution was obtained, it was kept at -17°C for 12 h, and a surface-modified hexagonal boron nitride sheet with a vol...

Embodiment 2

[0080] A kind of flexible QLED device is prepared, comprising steps:

[0081] (1) Deposit and prepare an ITO electrode on the substrate in Example 1;

[0082] (2) On the ITO anode, print PEDOT hole injection layer, TFB hole transport layer, CdSe quantum dot light-emitting layer, ZnO electron transport layer in sequence, and finally evaporate Al cathode to form a flexible QLED device.

[0083]In summary, the present invention provides a substrate and a preparation method thereof, a light-emitting device and a display screen. The substrate provided by the present invention uses a hexagonal boron nitride material with high thermal conductivity and excellent electrical insulation As well as the characteristics of good corrosion resistance and low thermal expansion coefficient, the surface-modified hexagonal boron nitride and cellulose are cross-linked to form a three-dimensional network structure of hexagonal boron nitride / cellulose airgel skeleton, Then the organic polymer base ...

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Abstract

The invention discloses a substrate, a preparation method thereof, a light-emitting device and a display screen, and the method comprises the following steps: providing hexagonal boron nitride, and carrying out alcoholization treatment of the hexagonal boron nitride to obtain hydroxylated hexagonal boron nitride; providing an organic ligand, wherein the organic ligand has an amino group and an active group, and the surface modification of the hydroxylated hexagonal boron nitride is performed through the organic ligand; providing cellulose, and performing the cross-linking of the cellulose withthe surface-modified hexagonal boron nitride to prepare a hexagonal boron nitride / cellulose aerogel skeleton of a three-dimensional network structure; providing an organic polymer substrate material,and placing the organic polymer substrate material in the hexagonal boron nitride / cellulose aerogel framework to prepare the substrate. The problem that a substrate in an existing light-emitting device is poor in heat conduction is solved.

Description

technical field [0001] The invention relates to the technical field of quantum dot light-emitting diodes, in particular to a substrate and a preparation method thereof, a light-emitting device and a display screen. Background technique [0002] With the continuous development of display technology, people have higher and higher requirements for display quality of display devices. Quantum dot light-emitting diodes (QLED) and organic light-emitting diodes (OrganicLight Emitting Diodes, OLED) are two new types of light-emitting devices with similar structures. QLED uses quantum dots (Quantum dots, QDs) as the light-emitting layer, which has incomparable advantages over other light-emitting materials, such as controllable small size effect, ultra-high internal quantum efficiency, excellent color purity, etc.; OLED uses organic As a light-emitting layer, it has many advantages such as low driving voltage, high luminous efficiency, short response time, high clarity and contrast, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/56H01L51/52H01L51/54
CPCH10K50/841H10K50/87H10K2102/00H10K71/00
Inventor 宋春蕾梁柱荣曹蔚然
Owner TCL CORPORATION