Method for producing quantum dot nanoparticles, Quantum dot nanoparticles prepared by the method, and Light emitting element

A nanoparticle and quantum dot technology, which is applied in the field of preparing quantum dot nanoparticles, can solve the problems of quantum dot nanoparticles being easily oxidized, luminous efficiency, and durability reduction, and achieve excellent quantum yield, narrow full width at half maximum, and color reproduction Excellent range of effects

Pending Publication Date: 2021-02-05
SHIN A T&C CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if water is bound to the quantum dot particles, the luminous efficiency increases in a short period of time, but there is a problem that the quantum dot nanoparticles are easily oxidized and the persistence of the luminous efficiency decreases

Method used

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  • Method for producing quantum dot nanoparticles, Quantum dot nanoparticles prepared by the method, and Light emitting element
  • Method for producing quantum dot nanoparticles, Quantum dot nanoparticles prepared by the method, and Light emitting element
  • Method for producing quantum dot nanoparticles, Quantum dot nanoparticles prepared by the method, and Light emitting element

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preparation example Construction

[0045] According to the production method of the present invention, quantum dot nanoparticles with a narrow full width at half maximum can be produced by narrowing the particle size distribution. If the cationic and anionic precursors meet water molecules during the preparation of quantum dot nanoparticles, the following reactions occur.

[0046] [Reaction Scheme 1]

[0047] In-(Alkyl Acid) 3 +H 2 O→HO-In-(Alkyl acid) 2 + Alkyl acid

[0048] P(SiMe 3 ) 3 +H 2 O→HO-P(SiMe 3 ) 2 +HO-SiMe 3

[0049]As shown in Reaction Scheme 1 above, the cationic and anionic precursors containing hydroxyl groups (-OH) have lower particle growth rates due to the reduction in bonding groups, and thus, the particle size distribution is also uniformly formed. However, the method of inputting only water has the disadvantage that it is difficult to introduce hydroxyl groups (—OH) into quantum dot nanoparticles.

[0050] Therefore, the preparation method of the present invention provides a ...

preparation example 1

[0133] Preparation Example 1: Preparation of Indium Precursor

[0134] 51.0 g (0.175 mol) of indium acetate, 134.5 g (0.525 mol) of palmitic acid and 152.2 g of 1-octadecene were charged into a 4-neck 1 L equipped with a heating mantle, reduced pressure vacuum, thermometer and mechanical stirrer glass reactor and the temperature was raised to 100°C while feeding nitrogen. After raising the temperature, it was confirmed that the solid compound was completely dissolved in the reactor, and the acetic acid produced during the reaction was completely removed while the temperature was raised to 170° C. and kept under reduced vacuum of 10 mTorr for 3 hours. Subsequently, 305.4 g of the indium palmitate precursor was cooled to room temperature and stored in a nitrogen-filled container.

preparation example 2

[0135] Preparation Example 2: Preparation of Zinc (Zn) Precursor

[0136] 64.2 g (0.35 mol) zinc acetate, 197.7 g (0.70 mol) oleic acid, and 373.1 g 1-octadecene were charged into a 4-neck 1 L glass reactor equipped with a heating mantle, reduced pressure vacuum, thermometer and mechanical stirrer and the temperature was raised to 100°C while feeding nitrogen. After raising the temperature, it was confirmed that the solid compound was completely dissolved in the reactor, and the acetic acid produced during the reaction was completely removed while the temperature was raised to 170° C. and kept under reduced vacuum of 10 mTorr for 3 hours. Subsequently, 592.1 g of the zinc oleate precursor was cooled to room temperature and stored in a nitrogen-filled container.

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Abstract

The present invention relates to a production method of quantum dot nano-particles, which comprises a step of producing quantum dot nano-particle by reacting at least one cationic precursor containingat least one of group 12 and 13 elements and at least one anionic precursor containing at least one of group 15 elements, wherein the reaction between the cation precursor and the anion precursor ismade under the supply of a compound represented by chemical formula 1, to quantum dot nano-particles produced by the production method, to core-shell structured quantum dot nano-particles comprising the quantum dot nano-particles as a core, and to a light emitting element comprising the quantum dot nano-particles having the core-shell structure.

Description

technical field [0001] The present invention relates to a method for preparing quantum dot nanoparticles, quantum dot nanoparticles prepared by the method, quantum dot nanoparticles having a core-shell structure, and a light-emitting element. Background technique [0002] In general, when a material is reduced to nanoscale, it has new physical properties that cannot be seen in bulk, because as the material is reduced to nanoscale, the difference in surface area / volume is reduced compared to bulk materials. The ratio becomes unusually large. [0003] Among these nanomaterials, there are quantum dots (QDs), which are semiconductor materials having a diameter of about 2 to 10 nm corresponding to the nanometer size. Quantum dots are materials that exhibit the quantum confinement effect, where the emission wavelength is different from that of the bulk, because when the bulk semiconductor material becomes smaller than a certain size, its electron motion properties are further res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/88B82Y20/00B82Y30/00
CPCC09K11/02C09K11/883B82Y30/00B82Y20/00B82Y40/00C09K11/0883C09K11/70H01L33/06
Inventor 洪承模宋真汉洪赫振朴硕奎李珠英李仁嫄
Owner SHIN A T&C CO LTD
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