Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of quantum dot material for silk-screen printing

A quantum dot material and screen printing technology, applied in nanotechnology, luminescent materials, chemical instruments and methods for materials and surface science, can solve the problems of complex preparation devices and difficulty in large-scale synthesis

Inactive Publication Date: 2017-08-18
SHANGHAI DONGZHOU IND
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN1978587A (application number: 200510019940.6) discloses a method for preparing water-soluble CdSe quantum dots by heating in an ultrasonic water bath. This method requires high-purity nitrogen for oxygen removal and protection, and the introduction of ultrasonic technology not only brings new noise pollution and energy Consumption, and complicate the preparation equipment, it is difficult to achieve large-scale synthesis

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0012] The preparation method of aqueous quantum dot solution of the present invention is characterized in that: selenium source, tellurium source are dispersed in deionized water, with sodium borohydride as ligand, at 50 o C to form a precursor; dissolve the cadmium source in deionized water, use sodium hexametaphosphate and mercaptosuccinic acid as stabilizers to form a ligand solution, and then mix and heat to react to obtain CdSe and CdTe quantum dot solutions.

[0013] The organic extraction solvent of the described water-based quantum dot particles of the present invention is one or more mixed solutions in isopropanol, cyclohexanol, methanol, and dimethylformamide, and the quantum dot solution and the organic solvent are mixed according to a certain amount. After proportional mixing, the organic solvent is fully contacted with the quantum dot particles by microwave vibration, and the original solution balance is disturbed, so that the quantum dot particles are precipitate...

Embodiment 1

[0024] Weigh CdCl 2 。 2.5H 2 0.871g of solid particles was placed in a three-necked flask, and 500ml of deionized water was added to stir for later use, then 0.813g of mercaptosuccinic acid was weighed, stirred and dissolved for later use, and the pH of the solution was adjusted to 11 with NaOH after the dissolution was complete.

[0025] Take another 0.093g of sodium borohydride and place it in a beaker, add 50ml of deionized water to dissolve it, then add SeO 2 Particles 0.106g, stirred and reacted for 30min.

[0026] Set the temperature of the heating mantle to 150 0 C. After constant temperature, add the solution in the beaker to the three-necked flask, pass nitrogen gas, add a condenser, and react at constant temperature for 1.5 hours. After the reaction is completed, turn off the heating mantle and cool to room temperature to obtain the aqueous quantum dot solution. Then take 10ml of the quantum dot solution. Add 100ml of ethanol solution, extract to obtain quantum d...

Embodiment 2

[0028] Weigh CdCl 2 。 2.5H 22.282g of O solid particles was placed in a three-necked flask, and 500ml of deionized water was added to stir for later use. Then, 2.124g of mercaptosuccinic acid was weighed, stirred and dissolved for later use, and the pH of the solution was adjusted to 11 with NaOH after the dissolution was complete.

[0029] Take another 0.254g of sodium borohydride and place it in a beaker, add 50ml of deionized water to dissolve, then add SeO 2 Particles 0.223g, stirred and reacted for 30min.

[0030] Set the temperature of the heating mantle to 300 0 C. After constant temperature, add the solution in the beaker to the three-necked flask, pass nitrogen gas, add a condenser, and react at constant temperature for 3 hours. After the reaction is completed, turn off the heating mantle and cool to room temperature to obtain the aqueous quantum dot solution. Then take 50ml of the quantum dot solution. Add 50ml of cyclohexanol solution, extract to obtain quantum ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to View More

Abstract

A preparation method of a quantum dot material for silk-screen printing is characterized in that the quantum dot material is prepared from water-based CdSe and CdTe quantum dot particles and an oily CdSe and CdTe quantum dot solution, wherein the water-based quantum dot particles are extracted from a water-based quantum dot solution through an organic extraction method, then surface silica-based treatment is conducted on the surfaces of the particles, the size of the quantum dot particles obtained after treatment is in the range of 10-20 nm, then the water-based quantum dot particles and the oil quantum dot solution are evenly mixed with screen printing ink, and the mixture is used as the required material for screen printing of QLED devices.

Description

technical field [0001] The invention belongs to the field of preparation and application of nanometer materials. Background technique [0002] Quantum dots are stable and fluorescent semiconductor nanocrystals with size-dependent electrical and optical properties. In recent years, it has been widely used in many fields, such as light-emitting diodes (LEDs), nonlinear optical devices, solar cells, life sciences, etc., and great progress has been made especially in the field of biomedicine. CdSe (cadmium selenide) has become the most studied quantum dot because its emission wavelength covers the entire visible light region. However, because the quality of quantum dots seriously restricts the development of its application research and the quality of research results, its preparation has always been one of the hotspots in nanoscience research. The preparation methods of quantum dots are mainly organic phase synthesis method and aqueous phase synthesis method. In addition, the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88B82Y20/00B82Y30/00B82Y40/00H01L51/50
CPCC09K11/883B82Y20/00B82Y30/00B82Y40/00H10K50/115
Inventor 郭素文郑岩边静宇宋丹丹宋长波张瑞君范翊陈磊刘星元乔泊赵谡玲徐征费运启
Owner SHANGHAI DONGZHOU IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com