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Quantum dot, light converting ink composition, light converting pixel, color filter, image display device

An ink composition, quantum dot technology, applied in ink, optics, instruments, etc., can solve the problems of decreased stability and reliability, unable to solve the problems of light fastness, decreased dispersibility, etc., to achieve improved brightness and reliability, excellent jetting Characteristics, low viscosity effect

Pending Publication Date: 2020-06-23
DONGWOO FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is a method of replacing organic molecules existing on the surface of quantum dots with organic molecules suitable for the desired application, but it has the disadvantage of causing fatal problems in luminous efficiency because it directly affects the surface of quantum dots
[0005] Korean Laid-Open Patent No. 10-2018-0002716 and Korean Registered Patent No. 10-1628065 disclose quantum dots containing ligands arranged on the surface, but the actual situation is that the dispersibility decreases due to low compatibility, and the stability and Decreased reliability, so still doesn't address lightfastness degradation over time

Method used

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  • Quantum dot, light converting ink composition, light converting pixel, color filter, image display device
  • Quantum dot, light converting ink composition, light converting pixel, color filter, image display device
  • Quantum dot, light converting ink composition, light converting pixel, color filter, image display device

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0147] Synthesis Example 1: Synthesis of InP / ZnS Core-Shell Quantum Dots

[0148] 0.05839 g of indium acetate, 0.12019 g of oleic acid, and 10 mL of 1-octadecene (ODE) were added to a three-necked flask (3-neck flask). While stirring the above-mentioned flask, after degassing at 110° C. and 100 mTorr for 30 minutes, it was heated to a temperature of 270° C. under an inert gas until the solution became transparent.

[0149] As a phosphorus (P) precursor, prepare 0.025054 g of tris(trimethylsilyl)phosphine, add 0.5 mL of 1-octadecene and 0.5 mL of tri-n-octylphosphine, and stir it under an inert gas Quickly inject into the above-mentioned flask which has been heated to 270°C. After reacting for 1 hour, the reaction was rapidly cooled to complete the reaction. Then, when the temperature of the flask reached 100° C., 10 mL of toluene was injected, and then transferred to a 50 mL centrifuge tube. After adding 10 mL of ethanol, purification was performed twice by precipitation ...

Synthetic example 2

[0153] Synthesis Example 2: Synthesis of InP / ZnSe / ZnS Core-Shell Quantum Dots

[0154] Add 0.4 mmol (0.058 g) of indium acetate (0.058 g), 0.6 mmol (0.15 g) of palmitic acid (0.15 g) and 20 mL of 1-octadecene into the reactor, and heat to 120° C. under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen. After heating to 280° C., a mixed solution of 0.2 mmol (58 μl) of tris(trimethylsilyl)phosphine (TMS3P) and 1.0 mL of trioctylphosphine was quickly injected and reacted for 0.5 minutes.

[0155] Next, 2.4 mmol (0.448 g) of zinc acetate, 4.8 mmol of oleic acid, and 20 mL of trioctylamine were added to the reactor, and heated to 120° C. under vacuum. After 1 hour, the atmosphere in the reactor was switched to nitrogen, and the temperature of the reactor was raised to 280°C. 2 mL of the previously synthesized InP core solution was added, followed by the addition of 4.8 mmol of selenium (Se / TOP) in trioctylphosphine, and then the final mixture was allo...

Embodiment 1

[0158] Example 1: Ligand Substitution Reaction 1 (LE-1)

[0159] Put 5 mL of the quantum dot solution obtained in Synthesis Example 1 into a centrifuge tube, and add 20 mL of ethanol to precipitate it. The supernatant was removed by centrifugation, 3 mL of chloroform was added to the precipitate, and after the quantum dots were dispersed, 2.50 g of 3-methoxybutyl 3-mercapto propionate represented by the following chemical formula 1-1 was added ( 3-Methoxybutyl 3-Mercaptopropionate (Aldrich Company)) was reacted for one hour while heating to 60° C. under a nitrogen atmosphere.

[0160] [Chemical formula 1-1]

[0161]

[0162] Next, 25 mL of n-hexane was added to the reactant to precipitate the quantum dots, followed by centrifugation to separate the precipitate, followed by drying at 60° C. for one hour in a vacuum drying oven (manufactured by Yamato Corporation, DP43) to obtain quantum dots. Click LE-1. The maximum emission wavelength is 516nm.

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Abstract

The present invention provides quantum dots, a light conversion ink composition containing the same, a light conversion pixel manufactured using the light conversion ink composition, a color filter including the light conversion pixel, and an image display device including the color filter, the quantum point is characterized by having a ligand layer on the surface. The ligand layer contains one ormore of the compound represented by the following chemical formula 1 and the compound represented by the chemical formula 2. In the chemical formula 1, L1 an alkylene group that is directly connectedor with the number of carbon atoms being 1 to 10, L2 is an alkylene group that is directly connected or with the number of carbon atoms being 1 to 30, and R1 and R2 are each independently an alkyl group of 1 to 22 carbon atoms or an alkenyl group of 4 to 22 carbon atoms, in chemical formula 2, L3 an alkylene group that is directly connected or having 1 to 30 carbon atoms, and R3 and R4 are eachindependently hydrogen, an alkyl group having 1 to 22 carbon atoms or an alkenyl group having 4 to 22 carbon atoms.

Description

technical field [0001] The present invention relates to quantum dots, a light conversion ink composition comprising the same, a light conversion pixel produced using the above light conversion ink composition, a color filter comprising the above light conversion pixel, and an image display device comprising the above color filter. Background technique [0002] Quantum dots have high luminescence and narrow luminescence spectrum, can adjust the luminescence wavelength by one excitation wavelength, and have the inherent characteristics of light-stable quantum dots, so far, they have been used for biological imaging or energy conversion, and illumination ( A large number of studies in important application areas such as LED). [0003] Such quantum dots are extremely sensitive to the surface state, and are oxidized from the surface by the dispersed solvent or the surrounding environment, resulting in a sharp decrease in luminous efficiency. For various applications of quantum d...

Claims

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Application Information

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IPC IPC(8): C09K11/70C09K11/88C09K11/02G02B5/22C09D11/38B82Y20/00B82Y30/00B82Y40/00
CPCC09K11/703C09K11/883C09K11/025G02B5/223C09D11/38B82Y20/00B82Y30/00B82Y40/00
Inventor 金亨柱金召喜金胄皓申奎澈
Owner DONGWOO FINE CHEM CO LTD
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