Oil-soluble blue-light quantum dot and preparation method thereof

A quantum dot and oil-soluble technology, which is applied in chemical instruments and methods, luminescent materials, semiconductor/solid-state device manufacturing, etc., can solve the problems of short lifespan and low current efficiency of blue light quantum dots, and achieve improved stability and enhanced fluorescence Strength and longevity, and the effect of not being easily oxidized

Active Publication Date: 2017-02-15
TCL CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an oil-soluble blue light quantum dot and its preparation method, aiming to solve the problems of low current efficiency and short lifespan of the existing blue light quantum dots in the long-wave band (458-465nm)

Method used

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  • Oil-soluble blue-light quantum dot and preparation method thereof
  • Oil-soluble blue-light quantum dot and preparation method thereof

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preparation example Construction

[0020] And, the embodiment of the present invention also provides a preparation method of oil-soluble blue light quantum dots, including the following steps, the flow chart is as follows figure 1 Shown:

[0021] S01. Provide a mixed solution of water-soluble blue light quantum dots and water-soluble metal nanoparticles, adjust the pH value to 7-10, vigorously stir the mixed solution, and react at room temperature for 3-10 hours to obtain a water-soluble blue light quantum dot coated with metal nanoparticles on the surface. Sexual blue light quantum dots;

[0022] S02. Provide an oil-soluble surface modifier containing a mercapto group, after dissolving and mixing the water-soluble blue light quantum dots coated with metal nanoparticles on the surface and the oil-soluble surface modifier containing a mercapto group, heat treatment is performed under an inert atmosphere, Obtain oil-soluble quantum dots.

[0023] Since water-soluble quantum dots are not suitable as display mate...

Embodiment 1

[0039] A preparation method of oil-soluble blue light quantum dots, comprising the following steps, its flow chart is as follows figure 1 Shown:

[0040] S11. Take 20ul of blue light (ZnCdS / ZnS) water-soluble quantum dots (30mg / ml) containing thioglycolic acid on the surface and 3ml of water-soluble gold (Au) nanoparticles (10mg / ml) and add them to a 50ml three-necked flask, and argon gas For protection, after stirring at room temperature for 10 minutes, NaHCO3 aqueous solution was added dropwise to the mixed solution to adjust the pH value of the mixed solution, and the dropwise addition was stopped until the pH value was 9. Then the mixed solution was vigorously stirred for 3h, and the carboxyl ions (-COO) on the surface of the quantum dots were fully mixed with gold nanoparticles - ) were combined into (-COOAu) in the form of ionic bonds, and then ethyl acetate was added to the quantum dot mixture for high-speed centrifugation to obtain blue light quantum dots wrapped with...

Embodiment 2

[0044] S21. Take 20ul of blue light (ZnCdS / ZnS) water-soluble quantum dots (30mg / ml) containing thioglycolic acid on the surface and 5ml of water-soluble silver (Ag) nanoparticles (10mg / ml) and add them to a 50ml three-necked flask, and argon gas For protection, stir at room temperature for 10 minutes and then add NaHCO dropwise to the mixture 3 Aqueous solution was used to adjust the pH value of the mixture until the pH value was 9 and the dropwise addition was stopped. Then the mixed solution was vigorously stirred for 3h, and the carboxyl ions (-COO) on the surface of the quantum dots were fully mixed with gold nanoparticles - ) into (-COOAg) in the form of ionic bonds, then add ethyl acetate to the quantum dot mixture and perform high-speed centrifugation to obtain blue light quantum dots wrapped with a single layer of silver (Ag) nanoparticles, and then centrifuge for standby.

[0045] Wherein, the silver nanoparticles can be prepared by the following method: under oil b...

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Abstract

The invention provides an oil-soluble blue-light quantum dot and a preparation method thereof. The oil-soluble blue-light quantum dot comprises a water-soluble blue-light quantum dot, a water-soluble metallic nano-particle layer coating the surface of the water-soluble blue-light quantum dot, and an oil-soluble ligand layer formed on the surface of the water-soluble metallic nano-particle layer. The preparation method comprises the following steps: providing a mixed solution of the water-soluble blue-light quantum dot and water-soluble metallic nano-particles, adjusting a pH value to 7 to 10, subjecting the obtained mixed solution to intense agitation and carrying out a reaction at a room temperature for 3 to 10 h so as to obtain the water-soluble blue-light quantum dot coated by the metallic nano-particles; and providing an oil-soluble surface modifying agent containing a mercapto group, dissolving and mixing the water-soluble blue-light quantum dot coated by the metallic nano-particles and the oil-soluble surface modifying agent containing the mercapto group, and carrying out heat treatment in an inert atmosphere so as to obtain the oil-soluble blue-light quantum dot.

Description

technical field [0001] The invention belongs to the technical field of quantum dot synthesis, and in particular relates to an oil-soluble blue light quantum dot and a preparation method thereof. Background technique [0002] In the field of display technology in the future, quantum dot display has attracted people's attention. Due to its advantages such as narrow half-width, high fluorescence intensity, and good stability, it has promoted the research boom of scientific researchers. However, red, green and blue (RGB) three-color quantum In order to be used as a next-generation new display material, dot itself must have better fluorescence intensity and stability as well as a longer lifespan. [0003] In quantum dot light-emitting devices (QLEDs), the device efficiency and lifetime of red and green light can meet the requirements of display, and are already comparable to organic light-emitting diodes (OLEDs). However, blue light quantum dot devices do not have high current e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/58B82Y30/00H01L51/50
CPCC09K11/02C09K11/584B82Y30/00H10K50/115
Inventor 程陆玲杨一行
Owner TCL CORPORATION
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